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Lightblue KK. 117

[ "Hybridization between sea turtle species occurs with particularly high frequency at two adjacent nesting areas in northeastern Brazil. To understand the outcomes of hybridization and their consequences for sea turtle conservation, we need to evaluate the extent of hybridization occurrence and possible deleterious effects in the hybrid progeny. Thus, we investigated the hypothesis of the existence of a new hybrid spot offshore of Brazil’s northeastern coast. The Abrolhos Archipelago is surrounded by the largest and richest coral reefs in the South Atlantic and is known to be a nesting site for loggerhead turtles (Carettacaretta). In this study, we performed a multidisciplinary investigation into levels of hybridization in sea turtles and their reproductive output in the Abrolhos beaches. Genetic data from mitochondrial DNA (mtDNA) and six autosomal markers showed that there are first-generation hybrid females nesting in Abrolhos, resulting from crossings between hawksbill males (Eretmochelysimbricata) and loggerhead females, and backcrossed hatchlings from both parental species. The type and extent of hybridization were characterized using genomic data obtained with the 3RAD method, which confirmed backcrossing between F1 hybrids and loggerhead turtles. The reproductive output data of Abrolhos nests suggests a disadvantage of hybrids when compared to loggerheads. For the first time, we have shown the association between hybridization and low reproductive success, which may represent a threat to sea turtle conservation." ]

[ "A1463" ]

[ "The late Pleistocene Holocene stratigraphic architecture on the northeastern Brazilian continental shelf off the Parnaíba Delta has been explored by high-resolution seismic profiles. The seismic surveys reveal the widespread distribution of incised valleys of different size in offshore continuation of the present-day Parnaiba delta. According to morphology two channel types can be distinguished: U-shaped channels in the eastern part and V-shaped channels in the western part. The stratigraphic successions were grouped into four seismic units separated by different seismic boundaries. The characteristics of the seismic boundaries and internal reflectors of the seismic units were used to distinguish between marine and riverine deposits. The incised-valleys architectural elements were used to link sedimentation processes and variations in base level from late Pleistocene channel avulsion and channel infill in the lowermost course of the paleo-Parnaíba River to marine sediments of the present-day inner shelf. The change of the depositional environments in relation to deglacial sea-level rise is compared to incised valley infills of the Mekong River and Red River systems in Southeast Asia.", "The rift phase of the Campos Basin developed during the Early Cretaceous on a heterogeneous crust comprising structures inherited from the Brasiliano-Pan African tectonic events, mostly generated during the Neoproterozoic-Cambrian amalgamation of western Gondwana blocks. The main rifting episode took place from the Hauterivian to the Barremian, then was succeeded by the transition and post-rift (SAG) phases during the Aptian. Rift faults developed as a result of a progressive rotation of extension from E-W to NW-SE. The role of pre-existing intra-basement structures on the style and evolution of the rift faults was investigated using 3D high-resolution seismic data, borehole logs and sidewall samples. Three seismic facies (SF1, SF2 and SF3) and three types of intra-basement structures (Surfaces, Geobodies and Internal Reflections) were identified and mapped. They represent, respectively, contrasting levels of seismic anisotropy, interpreted as metamorphic foliation, and ductile shear zones that bound rock units with particular seismic facies signatures. Sidewall cores show that banded biotite-gneiss is the predominant rock type in the eastern half of the study area, while more homogeneous granitoid is the dominant lithology on the west. Such a binary division of lithotypes is consistent with the distribution of mapped intra-basement seismic facies and features. The contrasting basement heterogeneity across the study area is the major control in the strain distribution during rifting. Where the basement is highly heterogeneous, the pre-existing fabric was selectively reactivated whenever its orientation was favourable, resulting in faults forming progressively as the extension direction rotates, whilst shallower low to very low angle basement fabric were cross-cut by rift faults. Where the basement is homogeneous, only early formed faults remain active throughout the rifting.", "We present the first evidence of Archean oceanic crust submitted to Proterozoic high-pressure (HP) metamorphism in the South American Platform. Sm–Nd and Lu–Hf isotopic data combined with U–Pb geochronological data from the Campo Grande area, Rio Grande do Norte domain, in the Northern Borborema Province, reflect a complex Archean (2.9 ?Ga and 2.6 ?Ga) and Paleoproterozoic (2.0 ?Ga) evolution, culminating in the Neoproterozoic Brasiliano/Pan-African orogeny (ca. 600 Ma). The preserved mafic rocks contain massive poikiloblastic garnet and granoblastic amphibole with variable proportions of plagioclase ?+ ?diopside in symplectitic texture, typical of high-pressure rocks. These clinopyroxene-garnet amphibolites and the more common garnet amphibolites from the Campo Grande area are exposed as rare lenses within an Archean migmatite complex. The amphibolite lenses represent 2.65 ?Ga juvenile tholeiitic magmatism derived from depleted mantle sources (positive ?Hf(t) values of +3.81 to +30.66) later enriched by mantle metasomatism (negative ?Nd(t) values of –7.97). Chondrite and Primitive Mantle-normalized REE of analyzed samples and discriminant diagrams define two different oceanic affinities, with E-MORB and OIB signature. Negative Eu anomalies (Eu/Eu? ?= ?0.75–0.95) indicate depletion of plagioclase in the source. Inherited zircon cores of 3.0–2.9 ?Ga in analyzed samples indicate that the Neoarchean tholeiitic magmatism was emplaced into 2923 ?± ?14 ?Ma old Mesoarchean crust (?Nd(t) ?= ?–2.58 and Nd TDM ?= ?3.2 ?Ga) of the Rio Grande do Norte domain. The age of retro-eclogite facies metamorphism is not yet completely understood. We suggest that two high-grade metamorphic events are recognized in the mafic rocks: the first at 2.0 ?Ga, recorded in some samples, and the second, at ca. 600 Ma, stronger and more pervasive and recorded in several of the mafic rock samples. The Neoproterozoic zircon grains are found in symplectite texture as inclusions in the garnet grains and represent the age of HP conditions in the area. These zircon grains show a younger cluster of concordant analyses between 623 ?± ?3 ?Ma and 592 ?± ?5 ?Ma with ?Hf(t) values of +0.74 to –65.88. Thus, the Campo Grande rock assemblage is composed of Archean units that were amalgamated to West Gondwana during Neoproterozoic Brasiliano orogeny continent-continent collision and crustal reworking.", "The ultimate effect that ocean acidification (OA) and warming will have on the physiology of calcifying algae is still largely uncertain. Responses depend on the complex interactions between seawater chemistry, global/local stressors and species-specific physiologies. There is a significant gap regarding the effect that metabolic interactions between coexisting species may have on local seawater chemistry and the concurrent effect of OA. Here, we manipulated CO2 and temperature to evaluate the physiological responses of two common photoautotrophs from shallow tropical marine coastal ecosystems in Brazil: the calcifying alga Halimeda cuneata, and the seagrass Halodule wrightii. We tested whether or not seagrass presence can influence the calcification rate of a widespread and abundant species of Halimeda under OA and warming. Our results demonstrate that under elevated CO2, the high photosynthetic rates of H. wrightii contribute to raise H. cuneata calcification more than two-fold and thus we suggest that H. cuneata populations coexisting with H. wrightii may have a higher resilience to OA conditions. This conclusion supports the more general hypothesis that, in coastal and shallow reef environments, the metabolic interactions between calcifying and non-calcifying organisms are instrumental in providing refuge against OA effects and increasing the resilience of the more OA-susceptible species.", "Two sediment cores collected in the shelf off Rio de Janeiro (RJ13-01B: 10.8 cal kyr BP, and RJ13-02B: 4.7 cal kyr BP) were investigated in high-resolution to evaluate changes in sedimentary processes and paleoclimatic and paleoceanographic variability during the Holocene in the Southeastern Brazil. Information from inorganic proxies of continental input (Al/Ca and Fe/Ca), redox-sensitive elements (Fe/Al, V/Al and Mn/Al), paleoproductivity (Sr/Al, Cd/Al and Ba/Al), as well as data for grain size, geophysical properties (p-wave velocity, gamma-ray density, acoustic impedance, magnetic susceptibility and porosity), Si, total organic carbon and calcium carbonate were considered. The data revealed three main periods of sediment accumulation: (i) from 10.8 cal kyr BP to 7.6 cal kyr BP the sediment was coarse, Si content was high (27%), the magnetic susceptibility was low and the presence of shell fragments all suggest a period of low continental input and the deposition site was shallow (i.e, lower sea level); (ii) from 7.5 cal kyr BP to 4.6 cal kyr BP the elevated ratios of Al/Ca (0.69 ± 0.08), Fe/Ca (0.27 ± 0.04), Sr/Al (31.57 ± 4.47) ×10?4, Cd/Al (0.09 ± 0.03) ×10?5 and Ba/Al (0.70 ± 0.16) ×10?4 are consistent with a period of maximum sea transgression and elevated influence of the nutrient-rich South Atlantic Central Water (SACW); (iii) from 4.5 cal kyr BP to the present, events of higher fluxes of TOC, Ni, Cu and Zn were observed from ca 3.2 cal kyr BP to 3.4 cal kyr BP, in both cores, related to humid climate. Overall, the multi-proxy approach shed light on the effects of climate and oceanographic variability on sediment input and accumulation in a less-studied portion of the Brazilian shelf, which are consistent with other shelf areas and with changes in regional climate systems like the Intertropical Convergence Zone (ITCZ), South American Monsoon Systems (SAMS) and South Atlantic Convergence Zone (SACZ).", "This study was conducted in the Itajaí-Açu river lower estuary in Southern Brazil, in which we aimed to: (1) analyze spatiotemporal variations on the macrofauna; (2) search for relationships between environmental variables and the assembly and (3) evaluate the influence of capital dredging upon the assembly. Two hundred twenty eight samples were performed in four stations, two of which affected by dredging. Sediment (sand, silt and clay, organic matter and carbonate) and water column´s variables (temperature, salinity, pH, dissolved oxygen, and turbidity) were also assessed. We applied Principal Component Analysis for environmental variables and Hierarchical Clustering for biotic data. Correlations between environmental and biotic matrices were tested by Canonical Analysis of Principal Coordinates. Spatiotemporal variations in the assembly were tested by Permutational Multivariate Analysis of Variance. From the 21.839 organisms sampled, 97% was represented by the gastropod Heleobia australis. Despite the influence of the river discharge on the ecosystem, dredging was deleterious to the assembly, favoring opportunistic organisms such as H. australis.", "Several Mesozoic successions of the Southern Tethyan margin were accumulated on a carbonate platform evolving to pelagic plateau depositional systems. Rifting paleotectonics was the main process conditioning their tectono-sedimentary evolution. The well-exposed outcrops in NW Sicilian fold and thrust belt of the so-called Trapanese carbonate platform to pelagic succession highlight the occurrence of lateral facies and thickness changes, paleofaults, volcanics, and resedimented deposits. The integration of facies analysis, stratigraphic data, and subsidence history have permitted to decipher the polyphase tectono-sedimentary evolution and to distinguish different depositional settings. Structural lows, filled with up to 100m-thick of pillow lavas and reworked deposits, appear as intraplatform basins bordered by structural highs, as horst ridges, characterised by condensed sedimentation, and isolated seamounts. These sectors were linked among them by stepped fault margins, scalloped margins and depositional slopes. The tectonic history, highlighted by the backstripped sections, reveals superimposed evolutionary stages reflecting rifting and rapid tectonic subsidence, leading to continental break-up (Late Triassic-Early Jurassic stage); the Middle Jurassic stage reflects slow thermal subsidence in the basin shoulders and higher rates in the intervening depressions; the Late Jurassic-Early Cretaceous regional uplift interrupts the thermal subsidence curve trend. The tract of the Late Cretaceous-Eocene curve suggests again slow thermal post-rift subsidence, also influenced by sediment load. The different subsidence curves, reconstructed from different positions in the sedimentary basin, demonstrate that its evolution could be driven by the identified syn-sedimentary faults that were formed and/or re-activated during several tectonic events encompassing the whole Jurassic-Cretaceous time period. The regional significance of this tectonics indicates that the Sicilian sector of the Southern Tethyan continental margin was tectonically active for the whole Mesozoic. The reconstructed paleophysiography of the Trapanese continental margin, during the Mesozoic, appears characterized by a segmented and drowned carbonate platform with morphostructural highs separated by deep channels. The comparison to the present-day morphostructural setting of some regions of the Atlantic continental margins (e.g. Caribbean, Brazilian Equatorial Margin), suggests also for the study region that the occurrence of transcurrent/transform faults and stretching of the continental lithosphere can have played an important role in determining the physiographic conformation.", "The distribution of planktonic foraminifera in box-core tops under the influence of a western boundary upwelling system along the southeastern Brazilian continental margin was examined to evaluate the similarity percentage (SIMPER) and to create a biofacies model for paleoenvironmental applications. Species associated with warm and oligotrophic water were distributed in the Rio de Janeiro sector of the Campos Basin, while productive water species were most abundant in the Rio de Janeiro sector of the Santos Basin, and cold-water species were most abundant in the Cabo Frio Upwelling System (CFUS). Four major biofacies are associated with the oceanographic setting of the CFUS: one from the Campos Basin (A - Brazil Current front), one from the Santos Basin (B - mixture of coastal and oceanic waters), and two associated with the Cabo Frio High in the northern biofacies (C) and southern biofacies (D). The distribution of biofacies C and D was associated with temperature differences. Biofacies C represents a mixture of upwelling and tropical waters, while biofacies D represents a mixture of cold, nutrient-rich and Santos Basin waters. These biofacies were also defined in core CF10-01B, in which six main paleoceanographic phases were characterized during the last 9 cal kyr, predominantly showing alternating dominance between biofacies C and D From 9.0 to 5.0 cal kyr before the present (BP), the system was dominated by biofacies C. Between 4.0 and 3.5 cal kyr BP, biofacies D was dominant. Between 3.5 and 2.5 cal kyr BP, a strong influence of coastal waters and weakened upwelling activity were indicated by the dominance of biofacies B + C + D. The last 2.5 cal kyr was dominated by biofacies D. The SST in this core was reconstructed using the Modern Analog Technique (MAT), which revealed 0.35. °C of variability, indicating no SST changes during the Holocene. The weak sensitivity of the MAT was due to the interplay among different oceanographic features.", "This study describes the characteristics of large-scale vertical velocity, apparent heating source (Q1) and apparent moisture sink (Q2) profiles associated with seasonal and diurnal variations of convective systems observed during the two intensive operational periods (IOPs) that were conducted from 15 February to 26 March 2014 (wet season) and from 1 September to 10 October 2014 (dry season) near Manaus, Brazil, during the Green Ocean Amazon (GoAmazon2014/5) experiment. The derived large-scale fields have large diurnal variations according to convective activity in the GoAmazon region and the morning profiles show distinct differences between the dry and wet seasons. In the wet season, propagating convective systems originating far from the GoAmazon region are often seen in the early morning, while in the dry season they are rarely observed. Afternoon convective systems due to solar heating are frequently seen in both seasons. Accordingly, in the morning, there is strong upward motion and associated heating and drying throughout the entire troposphere in the wet season, which is limited to lower levels in the dry season. In the afternoon, both seasons exhibit weak heating and strong moistening in the boundary layer related to the vertical convergence of eddy fluxes. A set of case studies of three typical types of convective systems occurring in Amazonia-i.e., locally occurring systems, coastal-occurring systems and basin-occurring systems-is also conducted to investigate the variability of the large-scale environment with different types of convective systems.", "Petrographic, mineralogical, elemental, isotopic and fluid inclusion analyses were integrated to unravel the diagenetic evolution of Brazilian Pre-Salt lacustrine carbonate reservoirs of northern Campos Basin, southeast Brazilian margin. Detailed thin section and cathodoluminescence petrography, scanning electron microscopy and electron microprobe analyses established a paragenetic evolution of diagenetic processes and products, comprising extensive dolomitization, silicification, and dissolution. A paragenesis including saddle dolomite, macrocrystalline calcite, mega-quartz, Sr-barite, celestine, fluorite, dickite, sphalerite, galena, and other metallic sulfides filling fractures and dissolution porosity, and aqueous fluid inclusions with homogenization temperatures of 92–152 °C and salinities between 13 and 26 wt % eq. NaCl characterized a hydrothermal system with some analogy to carbonate-hosted Pb–Zn Mississippi Valley (MVT) and Irish-type deposits. Petroleum inclusions and solid bitumen testify atypical oil generation and migration, associated with the hydrothermal flow. The host Pre-Salt spherulitic and fascicular carbonates present highly radiogenic 87Sr/86Sr ratios, indicating strong interaction with continental crust materials. Hydrothermal phases show ?18O values more negative than syngenetic and diagenetic carbonates. The ?13C values are interpreted as result of interaction between the hydrothermal fluids and the host rocks. The combined data set provides clear evidence of intense hydrothermal alteration of northern Campos Basin Pre-Salt reservoirs at deep-burial conditions (>2 km), possibly related to Late Cretaceous or more probably Paleogene magmatic activity. Mixed-sourced fluids bearing a basinal signature fed the hydrothermal system and promoted dissolution of the host rocks. The hydrothermal alterations had strong impact on the porosity, permeability, and heterogeneity, contributing, together with the associated fracturing, to the excellent production performance of the Pre-Salt reservoirs." ]

[ "Marine heatwaves are shown to be increasing in frequency and intensity owing to climate change caused by human activities and are having a mostly negative impact on marine ecosystems. Marine heatwaves and their impacts are projected to increase in the future but those increases can be strongly limited by efforts to mitigate climate change. Forecasting systems may be employed in adapting to the effects of marine heatwaves. Extreme El Niño and La Niña events have been observed but, because they occur infrequently, a human influence has not been detected. Nevertheless, models indicate an increase in the frequency of both phases of the oscillation under future scenarios of global warming. As in the case of marine heatwaves, forecasting systems, which already exist, may be employed in risk management and adaptation. While changes in the frequency and spatial distribution of tropical cyclones are hard to detect in the observational record, studies of individual cyclones have shown a human influence on their intensity, in particular, the associated rainfall. Changes in intensity are projected to increase in the future, with associated impacts on storm surges and coastal infrastructure. Although all coastal cities are already facing rising sea levels, low-lying cities and developing countries that lack the ability to invest in coastal defence measures and natural barrier restoration will suffer damage and losses of a higher degree. Global population studies suggest that people are relocating to coastal areas and will continue to do so, thereby putting more people at risk economically and socially. Although cities are typically centres for innovation and investment, key examples demonstrate the difficulty in solving such complex problems in vulnerable locations. Damage and losses are also driven by existing vulnerabilities in coastal infrastructure and may not be solely attributed to rising sea levels. Rather, increasing sea levels may exacerbate existing issues, increasing risk. The complex interactions of temperature and salinity with nutrients and chemical cycles of the ocean imply that variations in those variables owing to climate change and anthropogenic impact thus affect marine ecosystems, population, coastal communities and the related economy. Ocean warming is causing significant damage to marine ecosystems, and species are losing their habitats, forcing them to adapt or relocate to new temperatures or look for new feeding, spawning or nursery areas. Ocean acidity and the availability of sufficient oxygen both underpin the provision of marine ecosystem services to human society. Rapid changes in ocean acidity and falling oxygen levels caused by climate change and anthropogenic CO2 emissions are, however, now being observed, which is changing marine habitats and ecosystems worldwide. Warming is causing oxygen levels to fall, and acidification is rapidly changing the carbonate chemistry of surface ocean waters, which together are reducing the growth and survival of many organisms and degrading ecosystem resilience. Closing knowledge gaps in ocean science by supporting capacity-building efforts that increase the understanding of how the ocean and its ecosystems are responding to changes in ocean physical and chemical properties is an important pathway to reducing the impacts of such changes and achieving Sustainable Development Goal 14." ]

[ "B2437" ]

[ "Impacts of climate change and related changes in the atmosphere Changes in seasonal life cycles in the ocean It has been predicted under some climate change scenarios that up to 60 per cent of the current biomass in the ocean could be affected, either positively or negatively, resulting in disruptions to many existing ecosystem services. For example, modelling studies of species with strong temperature preferences, such as skipjack and bluefin tuna, predict major changes in range and/or decreases in productivity. The effects are found in all regions. For example, in the North-West Atlantic, the combination of changes in feeding patterns triggered by overfishing and changes in climate formed the primary pressures thought to have brought about shifts in species composition amounting to a full regime change, from one dominated by cod to one dominated by crustacea. Even in the open ocean, climate warming will increase ocean stratification in some broad areas, reduce primary production and/or result in a shift in productivity to smaller species (from diatoms of 2-200 microns to picoplankton of 0.2-2 microns) of phytoplankton. This has the effect of changing the efficiency of the transfer of energy to other parts of the food web, causing biotic changes over major regions of the open ocean, such as the equatorial Pacific.", "Impacts of climate change and related changes in the atmosphere Seaweeds and seagrasses Cold-water seaweeds, in particular kelps, have reproductive regimes that are temperature-sensitive. Increase in seawater temperature affects their reproduction and survival, which will consequently affect their population distribution and harvest. Kelp die-offs have already been reported along the coasts of Europe, and changes in species distribution have been noted in Northern Europe, Southern Africa and Southern Australia, with warm-water-tolerant species replacing those that are intolerant of warmer water. The diminished kelp harvest reduces what is available for human food and the supply of substances derived from kelp that are used in industry and pharmaceutical and food preparation. Communities with kelp-based livelihoods and economies will be affected. For seagrasses, increased seawater temperatures have been implicated in the occurrence of a wasting disease that decimated seagrass meadows in the north-eastern and northwestern parts of the United States. Changes in species distribution and the loss of kelp forest and seagrass beds have resulted in changes in the ways that those two ecosystems provide food, habitats and nursery areas for fish and shellfish, with repercussions on fishing yields and livelihoods.", "Extreme weather events are likely to become more frequent in the 21st century bringing significant impacts to coastal ecosystems. However, the capacity to detect and measure those impacts are still limited, with effects largely unstudied. In June 2016, a hailstorm with wind gusts of over 100 km·h?1 caused an unprecedented mangrove dieback on Eastern Brazil. To quantify the scale of impact and short-term recovery of mangroves (15-mo), we used satellite imagery and field sampling to evaluate changes in forest structure in control and impacted areas after the hailstorm. Satellite imagery revealed mangrove dieback in over 500 ha, corresponding to 29.3% of the total forest area suddenly impacted after the hailstorm. Fifteen months after the hailstorm, some impacted areas show an initial recovery, while others continued to degrade. The El Niño years of 2014–2016 created mild drought conditions in Eastern Brazil. As observed in wetlands of semi-arid regions during the same period, mangrove recovery may have been impaired by continued physiological stress and climate change effects. Economic losses in the study site from typical mangrove ecosystem services including food provision, climate regulation, raw materials and nurseries are estimated to at least US$ 792,624 yr?1. This is the first evidence of an extreme weather impact on mangroves in Brazil that typically provide unique ecological and economic subsistence to coastal populations. Our results reveal that there is a pressing need for long-term monitoring and climate change adaptation actions for coastal wetlands in Brazil, and to provide broad estimates of ecosystem values associated with these ecosystems given many areas are already experiencing chronic stress from local impacts, drought and high temperatures.", "Regulating services of marine and coastal ecosystems Oceans perform fundamental regulating services. They influence biologically mediated processes, such as carbon fixation and oxygen release, enabling climate mitigation and regulation. Similarly, coastal fringes perform a key role in sequestering carbon. Those services have an indirect use value for humans as they enable the maintenance of favourable and stable climate conditions (e.g., temperatures and precipitation) to which livelihood activities have adapted (e.g., crop cultivations), the preservation of human health, and infrastructure and other assets on which livelihoods depend. The role of coastal ecosystems in controlling pests and animal populations through trophic-dynamic relations and supporting pollination helps to keep at bay pests and diseases that can have an impact on cultivations, aquaculture activities and, potentially, human health. Coastal ecosystems play an important role in the prevention of coastal erosion and can act as both shoreline stabilization and protection against storms, attenuating the strength of the waves and reducing the vulnerability of coastal settlements to sea surges and flooding events. For example, it was estimated that the Indian Ocean tsunami of 2004 caused greater damage to areas that had been converted to shrimp ponds and other uses than those where the mangrove had remained intact (FEnvironmental Justice Foundation, 2006) and that, overall, the thicker the mangrove fringes were, the greater the protection to economic activity that they offered (Hochard and others, 2019). Albeit to a lesser extent, coral reefs, seagrass beds and other vegetated coastal ecosystems can also have a significant impact in dissipating wave action and offering shoreline protection (Spalding and others, 2014) provided that they are in a healthy state themselves. Supporting services of marine and coastal ecosystems Photosynthesis occurring in marine and coastal ecosystems enables the conversion of solar energy into plants and animals and the maintenance of the net primary productivity of the ecosystems. Coastal ecosystems perform a key role in maintaining biodiversity and suitable reproductive habitats and nursery grounds for aquatic species. The ecological niches and refuge for wild animals and plants that they provide directly support the provisioning services of marine and coastal ecosystems. For example, seagrass beds in the Mediterranean are estimated to contribute 30 to 40 per cent of the value of commercial fisheries landings and approximately 29 per cent of recreational fisheries expenditure (Jackson and others, 2015). Coastal ecosystems also act as pollution sinks, enable the storage and recycling of nutrients and support water cycling.", "Impacts of climate change and related changes in the atmosphere Ocean circulation The intensified study of the ocean as part of the study of climate change has led to a much clearer understanding of the mechanisms of ocean circulation and its annual and decadal variations. As a result of changes in the heating of different parts of the ocean, patterns of variation in heat distribution across the ocean (such as the El Niño-Southern Oscillation) are also changing. Those changes in patterns result in significant changes in weather patterns on land. Water masses are also moving differently in areas over continental shelves, with consequent effects on the distribution of species. There is evidence that the global circulation through the open ocean may also be changing, which might lead, over time, to reductions in the transfer of heat from the equatorial regions to the poles and into the ocean depths. Storms and other extreme weather events Increasing seawater temperatures provide more energy for storms that develop at sea. The scientific consensus is that this will lead to fewer but more intense tropical cyclones globally. Evidence exists that the observed expansion of the tropics since approximately 1979 is accompanied by a pronounced poleward migration of the latitude at which the maximum intensities of storms occur. This will certainly affect coastal areas that have not been exposed previously to the dangers caused by tropical cyclones. Ultraviolet radiation and the ozone layer The ultraviolet (UV) radiation emitted by the sun in the UV-B range (280-315 nanometres wavelength) has a wide range of potentially harmful effects, including the inhibition of primary production by phytoplankton and cyanobacteria, changes in the structure and function of plankton communities and alterations of the nitrogen cycle. The ozone layer in the Earth’s stratosphere blocks most UV-B from reaching the ocean’s surface. Consequently, stratospheric ozone depletion since the 1970s has been a concern. International action (under the Montreal Protocol on Substances that Deplete the Ozone Layer) to address that depletion has been taken, and the situation appears to have stabilized, although with some variation from year to year. Given those developments and the variations in the water depths to which UV-B penetrates, a consensus on the magnitude of the ozone-depletion effect on net primary production and nutrient cycling has yet to be reached. There is, however, a potential effect of ultraviolet on nanoparticles.", "Impacts of climate change and related changes in the atmosphere Loss of sea ice in high latitudes and associated ecosystems The high-latitude ice-covered ecosystems host globally significant arrays of biodiversity, and the size and nature of those ecosystems make them critically important to the biological, chemical and physical balance of the biosphere. Biodiversity in those systems has developed remarkable adaptations to survive both extreme cold and highly variable climatic conditions. High-latitude seas are relatively low in biological productivity, and ice algal communities, unique to those latitudes, play a particularly important role in system dynamics. Ice algae are estimated to contribute more than 50 per cent of the primary production in the permanently ice-covered central Arctic. As sea-ice cover declines, this productivity may decline and open water species may increase. The high-latitude ecosystems are undergoing change at a rate more rapid than in other places on earth. In the past 100 years, average Arctic temperatures have increased at almost twice the average global rate. Reduced sea ice, especially a shift towards less multi-year sea ice, will affect a wide range of species in those waters. For example, owing to low reproductive rates and long lifetimes, some iconic species (including the polar bear) will be challenged to adapt to the current fast warming of the Arctic and may be extirpated from portions of their range within the next 100 years.", "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "Theme G Adverse impacts on marine ecosystems come from the cumulative impacts of a number of human activities. Ecosystems, and their biodiversity, that might be resilient to one form or intensity of impact can be much more severely affected by a combination of impacts: the total impact of several pressures on the same ecosystem often being much larger than the sum of the individual impacts. Where biodiversity has been altered, the resilience of ecosystems to other impacts, including climate change, is often reduced. Thus the cumulative impacts of activities that, in the past, seemed to be sustainable are resulting in major changes to some ecosystems and in a reduction in the ecosystem services that they provide. Theme H The distribution around the world of the benefits drawn from the ocean is still very uneven. In some fields, this unevenness is due to the natural distribution of resources in areas under the jurisdiction of the various States (for example, hydrocarbons, minerals and some fish stocks). The distribution of some benefits is becoming less skewed: for example, the consumption of fish per capita in some developing countries is growing; the balance between cargoes loaded and unloaded in the ports of developing countries is moving closer to those in developed countries in tonnage terms. In many fields, however, including some forms of tourism and the general trade in fish, an imbalance remains between the developed and developing parts of the world. Significant differences in capacities to manage sewage, pollution and habitats also create inequities. Gaps in capacity-building hamper less developed countries in taking advantage of what the ocean can offer them, as well as reduce their capability to address the factors that degrade the ocean.", "Distribution of ocean benefits and disbenefits Changes in the universal ecosystem services from the ocean The most obvious distributional effects of climate change relate to the rise in sea level. Some small island States are predicted to become submerged completely and some heavily populated deltas and other low-lying areas also risk inundation. Another important distributional effect is the poleward extension of major areas of storms, which is likely to lead to cyclones, hurricanes and typhoons in areas previously not seriously affected by them. Changes in patterns of variability of oscillations (such as the El Niño-Southern Oscillation) will bring climatic changes to many places and affect new areas, with consequent effects on agriculture and agricultural earnings. The changes in ocean conditions will affect many other ecosystem services indirectly. For example, some models predict that the warming ocean will increase the fish biomass available for harvesting in higher latitudes and decrease it in equatorial zones. This will shift provisioning services to benefit the middle and moderately high latitudes (which are often highly developed) at the expense of low latitudes, where small-scale (subsistence) fishing is often important for food security.", "Impacts of climate change and related changes in the atmosphere Fish stock distribution As seawater temperatures increase, the distribution of many fish stocks and the fisheries that depend upon them is shifting. While the broad pattern is one of stocks moving poleward and deeper in order to stay within waters that meet their temperature preference, the picture is by no means uniform, nor are those shifts happening in concert for the various species. Increasing water temperatures will also increase metabolic rates and, in some cases, the range and productivity of some stocks. The result is changes in ecosystems occurring at various rates ranging from near zero to very rapid. Research on those effects is scattered, with diverse results, but as ocean climate continues to change, those considerations are of increasing concern for food production. Greater uncertainty for fisheries results in social, economic and food security impacts, complicating sustainable management." ]

[ "This paper describes the application of remote sensing data for oil spill monitoring in the Guanabara Bay, Rio de Janeiro, Brazil. During the emergency, Landsat-5/TM (Thematic Mapper) and Radarsat-1 data were acquired to monitor the location of the spill and its movement. Image classification procedures have been utilized to highlight oil-covered areas on the water surface. Ambiguities in the oil detection were resolved with the aid of ancillary information in a GIS (Geographic Information System) environment. The results obtained helped PETROBRAS to optimize the emergency response procedures and subsequent cleaning efforts." ]

[ "A719" ]

[ "The rupture of a pipeline transporting hydrocarbons at high temperature caused the spill of 1,300 m3 of fuel oil near the Guanabara Bay shoreline, on January 18, 2000. Immediately after the accident, an emergency effort was undertaken to obtain satellite images in order to monitor the spill's location and movement. One Landsat-5/TM (Thematic Mapper) and 15 Radarsat-1 images were acquired. This paper describes the results obtained with the interpretation of the first three images acquired after the spill. The low frequency of acquisition and the prevailing cloud cover limited the use of visible and infrared spaceborne sensors. Image processing techniques were applied to highlight oil-covered areas on the water surface. Ambiguities in the oil detection were resolved with the aid of ancillary information such as location of knows sources of pollution; aerial inspection information and OPS controlled aerial photos taken from helicopters. The RADARSAT-1 images show clearly the area affected by the spill accident allowing the differentiation of oil-free water areas, fluvial discharge or effluents areas, and oil-covered water areas. One limitation to oil detection using the Landsat-5/TM image was the presence of clouds and haze near the spilled area. In order to improve the visual discrimination of patterns on the water surface related to oil, many RGB combinations of the seven TM bands were evaluated. A supervised classification procedure was applied resulting in the following classes: oil-free water, fluvial discharge, bay areas affected by haze and oil-covered water. The CIS integration of the classification results with ancillary information, such as location of knows sources of pollution; aerial inspection information and GPS controlled aerial photos acquired simultaneously with image acquisition, allowed the final selection of oil-covered areas. The results obtained helped PETROBRAS to optimize the emergency response procedures and subsequent cleaning efforts.", "On the 18th January 2000 a broken pipeline owned and operated by the oil company Petrobras spilt some 1300 tonne of bunker fuel into Guanabara Bay, Rio de Janeiro. The wildlife response was divided amongst 2 operational strategies and included - avion fauna and cetaceans. This paper deals with the cetacean response only. Cetaceans are generally not considered as an important feature of an oil spill response. Contingency planning for cetaceans in oil spills is now becoming an important element for preparedness for some countries. The cetacean response in Guanabara Bay specifically targeted a pod of about 70 members of the species Sotalia fluviatilis, a small dolphin that inhabits the bay. The response included the development of a plan that included a response system, a monitoring program and action plans. The response system detailed the mechanism for the plan to work and adopted the incident control management system. The monitoring program related to the study of any short term or long term deleterious effects resulting from the spill and consisted of basic spatial, temporal and behavioural studies. Action plans were developed specific to the character of Guanabara Bay and included the rescue and rehabilitation strategies necessary to respond to oil affected cetaceans. A training program, was then developed and implemented to personnel who were to enact the cetacean response.", "Faced with the latest experiences on Brazilian oil spill incidents, Petrobras has been trying to overcome many challenges in environmental management and operational safety, aiming to prevent environmental risks. This paper presents the oil characterizations and monitoring studies in affected ecosystems such as the hot spots on soils affected by the Iguassu River oil spill (occurred in July 2000, due to a pipeline rupture in the scraper area of REPAR, a Petrobras refinery located in the state of Parana), by the Vessel Vergina II oil spill in São Sebastião channel (located in the state of São Paulo, occurred in November 2000) and lastly, the Guanabara Bay oil spill (a pipeline rupture that occurred in January 2000, due to a pipeline rupture between oil terminal and REDUC, a Petrobras refinery located in the state of Rio de Janeiro). Chemical analysis were performed in different sample matrixes including many parameters such as total petroleum hydrocarbons (TPH), aliphatic compounds (n-alkanes), unresolved complex mixtures (UCM), benzene, toluene, ethylbenzene and xylenes (BTEX), polycyclic aromatic hydrocarbons (PAH), terpanes and steranes, that are the parameters usually monitored after a spill oil. Visual inspections were also performed mainly in Guanabara Bay in order to identify the affected ecosystems by the spilled oil and to plot maps of classified regions based on the level of visual oil contamination. The acute toxicity was evaluated in water soluble fraction (WSF) of the spilled oils using ecotoxicological tests.", "On January 18, 2000, approximately 340,000 gallons (1,300 m3) of marine fuel (MF-380) spilled into Guanabara Bay, Rio de Janeiro, Brazil. The spill originated from a leak in the pipeline from the PETROBRAS refinery to the oil terminal. This paper presents the results for the water column and sediment monitoring 10 days after the spill, including n-alkanes, unresolved complex mixture (UCM), polycyclic aromatic hydrocarbons (PAHs), and toxicological essays. Chemical and toxicological monitoring of the water column was performed at 14 sampling stations throughout the impacted area in Guanabara Bay. The chemical analysis of PAHs by ultraviolet fluorescence showed results from <0.04–11.56 ?g/L?1 in chrysene equivalents. The toxicological essays for three species (Artemia sp., Mysidium gracile, and Vibrio fisheri, Microtox) indicate no acute effects for the water samples studied. To monitor sediments, 57 samples were collected from intertidal and sub tidal sites. For the 30 intertidal sediments, 73% contained PAHs (GC-MS) below 2 ?g/g?1, 20% were in the range 2–5 ?g/g?1, and only two stations (7%), located in the vicinity of the spill point, contained levels up to 20 ?g/g?1. For the 27 subtidal sediments, results were in the range of 0.2–9.6 ?g/g?1 for PAHs, 0.7–43.3 ?g/g?1 for n-alkanes, and 17.8–1,250 ?g/g?1 for UCM. The toxicological study for the sediments based on Vibrio fisheri (Microtox) indicated no acute toxicity effects. When comparing the post-spill results with previous hydrocarbon data, no significant impact was observed in sediments and water column because of the oil spill. There is, however, a significant background of chronic anthropogenic inputs to Guanabara Bay.", "In January 2000, Guanabara Bay in Rio de Janeiro experienced a major oil spilling caused by a break down in one PETROBRAS oil pipeline. Over than 1.3 tons of fuel oil escaped into the bay water in the northern region. Studies of foraminiferal taphonomic assemblages in sediment samples collected on three periods in the same stations, before and after the spilling, were important for the pollution impact evaluation during eight years. In 2005, in the north region, TOC values were higher than in 1999. It was observed the increase of test abnormalities, corrosion and dwarfism. Abundance and species richness reduced in 2005 and increased in 2008 but they did not reach the 1999 levels. Trends of dominant species confirmed the increase of pollution values in 2005: Abundance of A. tepida increased while B. elegantissima reduced. In 2008 there was an increase in the species richness with the occurrence of agglutinated species.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "In Brazil, environmental laws define oil containment and collection as a primary strategy to oil spills originated by exploitation and production enterprises that reaches water bodies. Thus, it is foreseen a continuous equipment increase over the time, in a scaled response, always in accordance to accidental scenarios forecasted in the enterprise risk assessment. This way, minor spills, with higher probability to occur, require smaller resources, however made available in a smaller rage of time, whereas larger and less frequent spills must be attended to with strongest resources, in a larger period of time. At Brazilian maritime zones with higher exploitation and production activities the use of larger vessels, aiming to solve the worst cases, was prioritizred. Such vessels are also used to respond the small and medium discharges, which could be solved by less robust vessels. The use of smaller and fastest vessels and simpler equipment to be operated allows the fleet's rationalization and a quicker and more effective response to more frequent situations. This changing also fosters economic profits (by reducing the figures and the fees paid by vessels chartering) and environmental benefits (by reducing emissions and the fuel consumption). In order to represent this situation, this paper compares the compliance with requirements from regulatory agency using an exclusive fleet of traditional boats and a fleet of traditional boats and fast response. A case study will be presented, considering a high activity oilfield on Brazilian coast.", "Petrobras announced a \"giant\" discovery in the northern part of Campos Basin, of at least an estimated recoverable 0.6 billion bbl of heavy oil. The reservoir, about 80 km offshore, was initially discovered in January 2001. The country's last major find, the 3 billion bbl, ultra-deep-water Roncador field, was made by Petrobras in 1996.", "On July 16, 2000 a major oil spill occurred at the side of the Araucaria refinery of Petrobras. A total of4,000 m3 of a light crude oil (41° API) ran down along a small two kilometers creek referred to as Arroio Saldanha, crossing and contaminating a series of four wetlands. The oil discharged into the Barigüi River, a tributary of the Iguassu River. It's estimated that twenty per cent of all the oil spilled volatilized. After running along the creek and its wetlands, the oil contaminated 6 kilometers of the Barigiii River and 60 kilometers of the Iguassu River. A comprehensive oil recovery emergency response operation was immediately engaged to clean the impacted area and the rivers. Some 3000 persons worked around the clock during the peak of the operations. Helicopters, trucks, oil recovering boats, light boats, mechanical excavators, dredgers and 3,200 meters of retention booms were used. Roads and accesses were reformed or built. The overall emergency response effort proved to be successful; in nine days, all of the free oil was removed from the rivers. The cleaning of the riverbanks and inundation areas was completed in three months. The Saldanha Creek and the four wetlands areas upgradient of the Bangui River retained approximately 70 per cent of all of the oil spilled, all superficial oil was removed until it could not move superficially, the remaining oil impregnated in the upper soil profiles. Since then, various remediation techniques were implemented to remediate both, soil surface water and groundwater. The upper portion of the soil profile is remediated with bioremediation, using natural indigenous microorganism. This technique consists in cultivating the soil with mechanical agricultural equipment or manuallv where accessibility does not allow the use of mechanical equipment. Nutrients and other amendments can be added when required. In some cases soil are bioaugmented with microorganisms of the \"landfarming\" cells of the refinery. This technique is a variant of the landfarming technique that has been studied at the Repar (Refinaria Presidente Getúlio Vargas) refinery for more than ten years. Such technique has proven to be more efficient than traditional landfarming. The soil below 40 centimeters cannot be remediated with this technique. Soils at such depth are being recovered through a series of drainage and injection trenches. Water injected in the injection trench forces the free and trapped oil to move laterally to the recovery trenches. The largest contaminated swamp was transformed in a treatment wetland and its recovery is being monitored and adjusted to quicken the recovering, thus minimizing interference with the natural ecosystem.", "On July 16, 2000, a crude oil spill occurred at the PETROBRAS refinery Refinaria Presidente Getúlio Vargas-REPAR, located in Araucária, PR, Brazil A significant quantity of oil was retained within an area known as Ponto 0, between the spill site and Rio Barigüi, contaminating the banks of a small stream (Arroio Saldanha), the soil adjacent to the stream, and the soil of four small wetlands, over a distance of 2 km. This paper presents an overview of the remediation program for Ponto 0, and draws preliminary conclusions regarding the efficacy of different remediation technologies. The major remediation technologies are: 1) injection and recovery trenches for free-product recovery in the sector adjacent to the spill site; 2) in situ bioremediation along the floodplain of Arroio Saldanha; and 3) a treatment wetland near the discharge of Arroio Saldanha into Rio Barigüi. The trenches appear to have removed most of the free product from the sector adjacent to the spill site. There is preliminary evidence, based on soil monitoring data, for the efficacy of in situ bioremediation, but further data will be required before a firm conclusion can be drawn. The treatment wetland was successful in restoring wetland vegetation (an essential component of this technology), and appears to be capable of removing hydrocarbons from groundwater. Data of the groundwater monitoring program indicates a general decline in TPH concentrations, over the October 2000, August 2001 and April 2002 sampling campaigns. BTEX concentrations are generally below the method detection limit." ]

[ "BG Group recently produced a new estimate on the Tupi oil discovery in the Santos basin, stating that the field contains 12-30 billion boe or more. On the one hand, Brazil's Petroleo Brasileiro SA (Petrobras) did not comment on the revised production estimate. It can be remembered that Petrobras reported the discovery to be 8 billion bbl of light crude in 2007. Meanwhile, BG claim have been produced in a statement regarding the company's long-term growth strategy, released ahead of the presentation of its fourth-quarter results." ]

[ "A960" ]

[ "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Campos Basin, the main production province in Brazil, was discovered in 1974. It is located on the North coast of the Rio de Janeiro State and comprises an area of around 115,000 km2 (28,400 acres), as shown in Figure 1. The producing oil fields are between 70 and 150 km (43 to 93 miles) far from the seashore. It started its production on August 13th, 1977 with 10,000 bopd (barrels of oil per day) from the well 1-EN-01-RJS, which produced to a semi-submersible platform; this well has produced nearly 35 million barrels of oil until February 1998, when it was shutdown for economical reasons. Today, after more than twenty-five years of continuous operation, the overall production system comprises 13 fixed platforms and 24 Floating Systems distributed among 42 oil fields, which account for the production of 1.21 million bopd - which corresponds to more than 80% of Petrobras oil production, plus 18.9 million m3 of gas per day - or 43% of the gas production (as of December 2002). Such an evolution was supported by investments in exploration and production development, in deepwater technology developments and in continuous management improvement. This paper describes the main driving forces to exploit Campos Basin - especially its deep and ultra-deepwaters fields, the technological and production developments performed, the experience accumulated by Petrobras along these 25 years of operations as well as its contribution to the global oil industry.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "Igneous rocks are widely developed in many hydrocarbon-bearing sedimentary basins in Brazil, and some igneous rocks play positive roles in the oil and gas accumulation process. But so far, no industrial oil or gas flow is discovered in igneous rocks in Brazilian onshore basins. At present, in some literatures published by some researchers, cases of igneous reservoirs in Brazil are inaccurate. The lithology of reservoirs in the Igarape Cuia oil and gas field, the oil and gas field of Urucu and the Barra Bonita gasfield, were previously thought to be volcanic rocks, but now are clastic rocks according to studies, and the igneous rocks in these three oil and gas field can only be acted as indirect and direct cap rocks. Furthermore, igneous rock reservoirs in the Campos Basin and Santos Basin in the Brazilian offshore are briefly analyzed. The representative Badejo oilfield in the Campos Basin has igneous rock reservoirs dominated by basalts which are intercalated with thin layers of volcaniclastic and sedimentary rocks, the storage space are vesicules, fractures and vugular pores, and the porosity of hydrocarbon bearing interval basalt reservoirs ranges from 10% to 15%. In addition, for the Santos Basin, igneous rocks in this basin are dominated by basic rocks, some alkaline intrusive rocks develop good micro spaces, mainly crystal moldic pores, inter- and intra-crystal dissolution pores and fractures, better reservoir intervals are often concentrated such as at sections near to unconformity surfaces and can have porosity of 6%–9% or higher; local pre-salt igneous rock reservoirs in the Santos Basin have the necessary conditions for hydrocarbon accumulation and it will be a new target layer for hydrocarbon exploration.", "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin.", "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "Petrobras announced a \"giant\" discovery in the northern part of Campos Basin, of at least an estimated recoverable 0.6 billion bbl of heavy oil. The reservoir, about 80 km offshore, was initially discovered in January 2001. The country's last major find, the 3 billion bbl, ultra-deep-water Roncador field, was made by Petrobras in 1996.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina." ]

[ "This study was conducted in the Itajaí-Açu river lower estuary in Southern Brazil, in which we aimed to: (1) analyze spatiotemporal variations on the macrofauna; (2) search for relationships between environmental variables and the assembly and (3) evaluate the influence of capital dredging upon the assembly. Two hundred twenty eight samples were performed in four stations, two of which affected by dredging. Sediment (sand, silt and clay, organic matter and carbonate) and water column´s variables (temperature, salinity, pH, dissolved oxygen, and turbidity) were also assessed. We applied Principal Component Analysis for environmental variables and Hierarchical Clustering for biotic data. Correlations between environmental and biotic matrices were tested by Canonical Analysis of Principal Coordinates. Spatiotemporal variations in the assembly were tested by Permutational Multivariate Analysis of Variance. From the 21.839 organisms sampled, 97% was represented by the gastropod Heleobia australis. Despite the influence of the river discharge on the ecosystem, dredging was deleterious to the assembly, favoring opportunistic organisms such as H. australis." ]

[ "A1709" ]

[ "Increasing inputs of harmful material Offshore hydrocarbon industries Major disasters in the offshore oil and gas industry have a global, historical recurrence of one about every 17 years. The most recent is the Deepwater Horizon blowout of 2010, which spilled 4.4 million barrels (about 600,000 tons) of oil into the Gulf of Mexico. The other main harmful inputs from that sector are drilling cuttings (contaminated with drilling muds) resulting from the drilling of exploration and production wells, “produced water” (the water contaminated with hydrocarbons that comes up from wells, either of natural origin or through having been injected to enhance hydrocarbon recovery), and various chemicals that are used and discharged offshore in the course of exploration and exploitation. Those materials can be harmful to marine life under certain circumstances. However, it is possible to take precautions to avoid such harm, for example by prohibiting the use of the most harmful drilling muds, by limiting the proportion of oil in the produced water that is discharged or by controlling which chemicals can be used offshore. Such regulation has been successfully introduced in a number of jurisdictions. Nonetheless, given the growth in exploration and offshore production, there is no doubt that those inputs are increasing over time, even though exact figures are not available globally. Produced water, in particular, increases in quantity with the age of the field being exploited. Offshore mining The environmental impacts of near-shore mining are similar to those of dredging operations. They include the destruction of the benthic environment, increased turbidity, changes in hydrodynamic processes, underwater noise and the potential for marine fauna to collide with vessels or become entangled in operating gear.", "This work reports the chemical monitoring of saline water and sediments at Aratu port, All Saints Bay, Brazil, when subjected to a deep dragging process (DDP) over a 2-year period (2010–2012). The aim of this work was to detect which metals had possible deleterious effects on the biota. It analyzed percentage of silt + clay and TOC and metal concentrations (As, Cd, Cu, Cr, Ni, Pb, and Zn) before, during, and after the DDP. The determination of metal concentration in sediments used the following techniques: atomic absorption spectrometer with flame, also with hydrate generation, and cold vapor spectrophotometry. The DDP disturbed the concentrations of metals in sediments and water, but 15 months after the DDP, only Cu and Zn were detectable on the bottom saline water, and 20 months after the DDP, only Zn was detectable in water. This fact indicates that these metals were longer available for absorption by the marine biota with probable deleterious effect. Indeed, studies by others during the DDP in Aratu port, indicated the decrease from 50 to 40 of the number of microalgae species identified. On the other hand, in the sediments, 20 months after the DDP, the concentrations of As, Cr, Cu, Pb, and Hg, returned to the original values, but Ni and Zn did not return to their original values. Comparison with studies by others indicated that the sediments from dredging were inappropriate for disposal at sea. This work indicated that the metals Cu, Ni, and Zn are the most deleterious elements to the marine environment.", "Extreme weather events are likely to become more frequent in the 21st century bringing significant impacts to coastal ecosystems. However, the capacity to detect and measure those impacts are still limited, with effects largely unstudied. In June 2016, a hailstorm with wind gusts of over 100 km·h?1 caused an unprecedented mangrove dieback on Eastern Brazil. To quantify the scale of impact and short-term recovery of mangroves (15-mo), we used satellite imagery and field sampling to evaluate changes in forest structure in control and impacted areas after the hailstorm. Satellite imagery revealed mangrove dieback in over 500 ha, corresponding to 29.3% of the total forest area suddenly impacted after the hailstorm. Fifteen months after the hailstorm, some impacted areas show an initial recovery, while others continued to degrade. The El Niño years of 2014–2016 created mild drought conditions in Eastern Brazil. As observed in wetlands of semi-arid regions during the same period, mangrove recovery may have been impaired by continued physiological stress and climate change effects. Economic losses in the study site from typical mangrove ecosystem services including food provision, climate regulation, raw materials and nurseries are estimated to at least US$ 792,624 yr?1. This is the first evidence of an extreme weather impact on mangroves in Brazil that typically provide unique ecological and economic subsistence to coastal populations. Our results reveal that there is a pressing need for long-term monitoring and climate change adaptation actions for coastal wetlands in Brazil, and to provide broad estimates of ecosystem values associated with these ecosystems given many areas are already experiencing chronic stress from local impacts, drought and high temperatures.", "Many estuaries present natural harbor conditions with relatively calm and shallow waters that provide a connection between the ocean and continental waterways. The increase in the demand for goods by the constant growing of the world population has forced estuaries to be altered by human activities, such as dredging, in order to maintain a safe navigation system. The development of sophisticated morphological and hydrodynamic models opened a new perspective of assisting dredging operations inside different estuaries. Thus, the aim of this study is to apply a hydromorphodynamic model to simulate the bed evolution of the Patos Lagoon estuary, southern Brazil. The results of the simulation were applied in a dredge operation model to simulate dredging inside the waterway of the Rio Grande harbor, located inside the Patos Lagoon estuary. The salinity and current velocities inside the estuary were well represented by the model simulations. An annual mean discharge of 3 407 ms3 s?1 was calculated for the lagoon for the year 2004. The morphodynamic model successfully represented the silted and eroded scenarios for the estuarine channel. The dredge operation model results affirm that dredging of the channel causes significant variations in estuarine physical parameters such as salinity, current velocity and suspended sediment concentration. The bed evolution results indicate that a fast siltation of the channel occurs right after dredging stops, stabilizing the variations after a 60-day period.", "Currently, the Port of Santos is the largest in Latin America, and its access channel is in the process of deepening, intending to reach 17 m DHN as an ultimate goal. Specifically for the maritime bar section, which is now maintained only by dredging, a significant increase in the volume of maintenance dredging is expected. The current study applied the physical modelling to evaluate the effectiveness of two curved jetties in the maintenance of depth along the inlet entrance of Santos channel, its impact on the dispersion of the plume of effluents from the existing outfall and its influence on the beach adjacent to the proposed right jetty. As a result, the jetties’ layout could maintain the access channel’s depth with a much lower volume of dredging than the current maintenance requires. It was found that the increase of 1.2 km on the outfall’s original length would not only reduce the influence of the jetties’ presence, but also improve significantly the dispersion of effluents in comparison to the original situation. Moreover, the presence of the jetties induces a marine accretion that tends to protect the region adjacent to the inlet, which is currently suffering a severe erosion process. Finally, the study shows that it is completely feasible to adopt the curved jetties to transpose the Port of Santos’ maritime bar, which may be configured as an economic and attractive option to maintain depths of 17 m DHN.", "On July 16, 2000 a major oil spill occurred at the side of the Araucaria refinery of Petrobras. A total of4,000 m3 of a light crude oil (41° API) ran down along a small two kilometers creek referred to as Arroio Saldanha, crossing and contaminating a series of four wetlands. The oil discharged into the Barigüi River, a tributary of the Iguassu River. It's estimated that twenty per cent of all the oil spilled volatilized. After running along the creek and its wetlands, the oil contaminated 6 kilometers of the Barigiii River and 60 kilometers of the Iguassu River. A comprehensive oil recovery emergency response operation was immediately engaged to clean the impacted area and the rivers. Some 3000 persons worked around the clock during the peak of the operations. Helicopters, trucks, oil recovering boats, light boats, mechanical excavators, dredgers and 3,200 meters of retention booms were used. Roads and accesses were reformed or built. The overall emergency response effort proved to be successful; in nine days, all of the free oil was removed from the rivers. The cleaning of the riverbanks and inundation areas was completed in three months. The Saldanha Creek and the four wetlands areas upgradient of the Bangui River retained approximately 70 per cent of all of the oil spilled, all superficial oil was removed until it could not move superficially, the remaining oil impregnated in the upper soil profiles. Since then, various remediation techniques were implemented to remediate both, soil surface water and groundwater. The upper portion of the soil profile is remediated with bioremediation, using natural indigenous microorganism. This technique consists in cultivating the soil with mechanical agricultural equipment or manuallv where accessibility does not allow the use of mechanical equipment. Nutrients and other amendments can be added when required. In some cases soil are bioaugmented with microorganisms of the \"landfarming\" cells of the refinery. This technique is a variant of the landfarming technique that has been studied at the Repar (Refinaria Presidente Getúlio Vargas) refinery for more than ten years. Such technique has proven to be more efficient than traditional landfarming. The soil below 40 centimeters cannot be remediated with this technique. Soils at such depth are being recovered through a series of drainage and injection trenches. Water injected in the injection trench forces the free and trapped oil to move laterally to the recovery trenches. The largest contaminated swamp was transformed in a treatment wetland and its recovery is being monitored and adjusted to quicken the recovering, thus minimizing interference with the natural ecosystem.", "This paper will describe the improvement made to the reamer cutter blocks to enhance its durability and optimize the Pre-salt Well Construction Currently, most of the Brazilian's Pre-Salt wells have the last phase built-in 12.25in. In some situations, it is necessary to drill oil wells in a giant offshore field wells with five phases, enlarging the third phase from 18.125in to 22in. The high abrasiveness encountered at this phase increased the number of runs needed to drill it and, consequently, time and costs that encouraged the development of solutions. This work relates what has been observed during the last years about reaming difficulties, specifically, in the enlargement from 18.125in to 22in when facing abrasive formations. Petrobras specialists analyzed these events and concluded the matrix of the reamer's cutter blocks was wearing faster and losing the capacity to hold the PDC cutters. The hole enlargement company, that Petrobras works for nowadays, developed a process that increased the resistance of the cutter blocks by increasing the hardness of the surface material prior to the brazing of the cutters. Then, Petrobras has had the opportunity to use both modified and common cutter blocks in a challenging operation to compare their durability and the results were completely satisfactory. The modified cutter blocks had much less wearing on the same formations. Based on this operation, we can conclude this process is validated since improved the reamer cutter blocks quality and its lifetime. This paper can serve as a guide to reduce operations costs and to optimize well construction when there are concrete possibilities to enlarge abrasive formations.", "Ports link world commerce via maritime routes, and dredging services are essential to establish and maintain these connections. However, one question is critical when dredging is being considered: where are the best places to do it? To try to answer this question, a Dredging Sensitivity Index (DSI) was developed as a management tool to be used in project planning steps. In order to diminish environmental damages and quality-of-life losses, DSI provides alternatives by identifying sensitivity areas. This new methodology quantifies impacts caused by the sediment removal step and points out favorable areas to dredge, with a simple map. Parameters such as fine-grain content (% < 63 ?m), Acid Volatile Sulfides (AVS), Shannon-Wiener Index and fisheries, among others, were used to calculate the DSI. Formulas were used to weight and aggregate both, the parameters and the DSI itself. Sepetiba Bay was chosen to apply this methodology because of its relevant economic and environmental aspects. The methodology was applied to dredging situations, but it can be used to indicate areas for dredged material disposal, with a few modifications in the DSI formulas. A DSI map was a final result of this methodology, and showed that the northern portion of the bay, close to the littoral is a more sensitive area, where dredging should be avoided, or carried out very carefully. DSI is a very useful tool for reducing damages from dredging services, it contributes with zonation and it provides alternatives to decision-makers who manage these areas.", "Impacts of climate change and related changes in the atmosphere Seaweeds and seagrasses Cold-water seaweeds, in particular kelps, have reproductive regimes that are temperature-sensitive. Increase in seawater temperature affects their reproduction and survival, which will consequently affect their population distribution and harvest. Kelp die-offs have already been reported along the coasts of Europe, and changes in species distribution have been noted in Northern Europe, Southern Africa and Southern Australia, with warm-water-tolerant species replacing those that are intolerant of warmer water. The diminished kelp harvest reduces what is available for human food and the supply of substances derived from kelp that are used in industry and pharmaceutical and food preparation. Communities with kelp-based livelihoods and economies will be affected. For seagrasses, increased seawater temperatures have been implicated in the occurrence of a wasting disease that decimated seagrass meadows in the north-eastern and northwestern parts of the United States. Changes in species distribution and the loss of kelp forest and seagrass beds have resulted in changes in the ways that those two ecosystems provide food, habitats and nursery areas for fish and shellfish, with repercussions on fishing yields and livelihoods.", "Several gas-influx events occurred while drilling an exploratory well in 4,219 ft of water offshore the southeast coast of Brazil. The 9 5/8-in. casting was set at 12,480 ft before drilling the final 8 1/2-in. phase of the program. A sequence of gas-influx events adversely affected drilling operations. Water-based mud (WBM) mixed with the gas influx formed hydrates in the choke and kill lines in the low-temperature environment close to the seafloor. The full-length paper contains a table that reports in detail events during the 13 days following the first gas influx." ]

[ "Micropaleontological analyses based on calcareous nannofossils were conducted on samples taken from the Agencia Nacional de Hidrocarburos (ANH)-Piedras Blancas-1 Well, which was drilled in the Sinú–San Jacinto Basin, Caribbean Region of Colombia. A summary of published literature on fossil coccolithophores from the marine Cenozoic record of South America reveals that our study is the first to report Lower Eocene coccolith-bearing sedimentary rocks in the substratum of the Caribbean inland margin. The assemblages are characterized by common occurrences of Reticulofenestra dictyoda and Sphenolithus radians and sporadic occurrences of Girgisia gammation, Heliodiscoaster lodoensis, and Sphenolithus orphanknolli. The co-occurrence of H. lodoensis, R. dictyoda, and S. orphanknolli indicates that the core between 1190 ft (362 m) and 279 ft (85 m) encompasses Zone NP12 to Subzone NP14a and spans the interval between ~53 to ~48.3 Ma of the latest Early Eocene (Late Ypresian Age). Small placoliths (R. dictyoda and Reticulofenestra <3 lm) and sphenoliths (S. radians and Sphenolithus spp.) dominate the tropical assemblages. Other species include Campylosphaera dela, Coccolithus formosus, Coccolithus pelagicus, Helicosphaeroides lophota, Helicosphaeroides seminulum, and Pontosphaera spp. Investigations on calcareous nannofossil distribution in Cenozoic marine sediments from South America are few, and most published information concerns the Brazilian continental margin and inland Argentina. The Man Aike Formation from the Austral Basin of Argentina is the only Lower Eocene formation available for comparison." ]

[ "A1584" ]

[ "This study analyzes the geographical distribution of 131 podocopid ostracod species recovered from the Brazilian continental shelf between Cabo de São Roque (lat. 05°30’S) and Cabo Frio (lat. 23oS). This very large area corresponds to the northeastern and eastern Brazilian marine regions. The 104 samples studied were collected in water depths ranging from 12 to 110 m as part of the legs 4 and 7 of the REMAC Project. The cosmopolitan species, as well as those shared with the Caribbean and/or Gulf of Mexico region, represent a small part of the ostracods herein studied and it is assumed that their dispersion was prompted by processes linked to events of relative sea level changes during the Neogene and Quaternary. The fossil record of some species spans to the Neogene, mostly from the Atlantic coast of North and Central America, while one species has Tethyan origin. Three species known from the Neogene of the Caribbean have been recorded as relicts in the study area. From the 131 species herein identified, 36.5% are more widespread in temperate waters south of Cabo Frio town, 46.5% of warm waters north of Cabo Frio town, 4% are present only in the studied area, and 11.5% are rare and probably restricted to the E region. A new province – the Brazilian Province – is herein proposed based on the species occurrence.", "This study refers to the palynological analysis of wells samples (cores) awarded by Petrobras and Eletronorte and has almost all stratigraphically positioned within the Trombetas Group, composed, from base to top by Autás-Mirim (Upper Ordovician neritic sandstones and shales); and Nhamundá (neritic sandstones of the glaciogenic deposits, of Llandovery and lower Wenlock) Formations; upper and lower Pitinga members, (upper and lower Llandovery marine Shales and diamictites and lower Ludlow); and Manacapuru Formation (neritic sandstones and pelitic rocks of upper Pridoli to Lochkovian). Three short glacial episodes are recorded in this sedimentary sequence, during the Silurian, on the Nhamundá Formation (lower Aeronian, upper Aeronian to lower Telychian and upper Telychian to lower Wenlock). This study objective the register of the stratigraphical distribution of the diversity of Deunffia and Domasia genera Silurian acritarchs of the Pitinga Formation, Amazon Basin, as well as its importance as guide-fossils once they have been presented as excelent worldwide chronostratigraphic indicators for the Llandovery/Wenlock interval. Their wide geographical distribution and restrict time occurrence in the Silurian interval, provide worldwide sharp dating and correlation of marine sequences due to this organic composition microfossil are dominant in the Paleozoic.", "The vegetation history and climate in southeastern Brazil, as well as the oceanic dynamics of the tropical Atlantic Ocean offshore, were reconstructed for the last 7.4 cal ka BP. This reconstruction was based on pollen, fern spores and dinoflagellate cysts identified in a marine core (CF10–04B). It was possible to verify the presence of an ombrophilous forest from 7.4 cal ka BP. Near the base of the PI zone low concentrations of pollen and fern spores are recorded, along with low frequencies of forest taxa and fern spores and an increase in pollen types of open vegetation, suggesting less humid climatic conditions than currently observed in the coastal regions of Southeastern Brazil. The assemblages of dinoflagellate cysts suggest a neritic zone with warm upper column temperature, high salinity and oligotrophic environment (evidenced by the presence of O. centrocarpum, Spiniferites spp. and L. machaerophorum). An increase in Tropical Waters (TW) and the approximation of the Brazilian Current (BC) in the middle shelf of southeastern Brazil in the mid-Holocene probably influenced the low accumulation of cysts, pollen grains, fern spores, and their associations. It is still possible to verify that at approximately 4.6 cal ka BP, an increase in the rainfall in the southeastern Brazilian region was probably the fundamental factor for the expansion of vegetation, mainly based on the considerable increases in hygrophytic and aquatic plants. The marked increase in the accumulation of dinoflagellate cysts, with the dominance of autotroph taxa (mainly O. centrocarpum, followed by Spiniferites spp), evidences the warmer waters of the BC and more intense surface upwelling of the South Atlantic Central Water (SACW).", "The distribution of planktonic foraminifera in box-core tops under the influence of a western boundary upwelling system along the southeastern Brazilian continental margin was examined to evaluate the similarity percentage (SIMPER) and to create a biofacies model for paleoenvironmental applications. Species associated with warm and oligotrophic water were distributed in the Rio de Janeiro sector of the Campos Basin, while productive water species were most abundant in the Rio de Janeiro sector of the Santos Basin, and cold-water species were most abundant in the Cabo Frio Upwelling System (CFUS). Four major biofacies are associated with the oceanographic setting of the CFUS: one from the Campos Basin (A - Brazil Current front), one from the Santos Basin (B - mixture of coastal and oceanic waters), and two associated with the Cabo Frio High in the northern biofacies (C) and southern biofacies (D). The distribution of biofacies C and D was associated with temperature differences. Biofacies C represents a mixture of upwelling and tropical waters, while biofacies D represents a mixture of cold, nutrient-rich and Santos Basin waters. These biofacies were also defined in core CF10-01B, in which six main paleoceanographic phases were characterized during the last 9 cal kyr, predominantly showing alternating dominance between biofacies C and D From 9.0 to 5.0 cal kyr before the present (BP), the system was dominated by biofacies C. Between 4.0 and 3.5 cal kyr BP, biofacies D was dominant. Between 3.5 and 2.5 cal kyr BP, a strong influence of coastal waters and weakened upwelling activity were indicated by the dominance of biofacies B + C + D. The last 2.5 cal kyr was dominated by biofacies D. The SST in this core was reconstructed using the Modern Analog Technique (MAT), which revealed 0.35. °C of variability, indicating no SST changes during the Holocene. The weak sensitivity of the MAT was due to the interplay among different oceanographic features.", "The aim of this work was to carry out a paleoenvironmental study of Holocene sedimentary deposits in the southern sector of Pernambuco's coast (northeastern Brazil). This work addresses an important aspect of Quaternary research that has implications for current climate debates, for instance, how does vegetation react to changing climate and rising sea levels. Thus, we provide a combined approach using sedimentological, palynological, geochemical analyses (stable isotopes i.e., ?13C, ?15N and C:N), in addition to AMS 14C dating from two surficial sediment cores i.e. T4 (up to 150 cm depth) and T5 (up to 136 cm depth) collected from the Formoso River estuarine system. Climatic oscillations show variation in precipitation and atmosphere humidity, marked by areas of expansion and/or retraction of herbaceous plain and forest vegetation. Variations in vegetation composition over the last 7168–7260 cal yr BP in the Formoso River estuary reflects the strong influence of sea-level variations, which were responsible for changes in coastal paleogeography and paleogeomorphology. Changes in vegetation composition indicate its close relationship with transgressive and regressive marine events and corresponding variation of the depositional environment like lakes to coastal lagoons, tidal channels, sandy strand-plain, and the modern estuary of the Formoso River.", "Two sediment cores collected in the shelf off Rio de Janeiro (RJ13-01B: 10.8 cal kyr BP, and RJ13-02B: 4.7 cal kyr BP) were investigated in high-resolution to evaluate changes in sedimentary processes and paleoclimatic and paleoceanographic variability during the Holocene in the Southeastern Brazil. Information from inorganic proxies of continental input (Al/Ca and Fe/Ca), redox-sensitive elements (Fe/Al, V/Al and Mn/Al), paleoproductivity (Sr/Al, Cd/Al and Ba/Al), as well as data for grain size, geophysical properties (p-wave velocity, gamma-ray density, acoustic impedance, magnetic susceptibility and porosity), Si, total organic carbon and calcium carbonate were considered. The data revealed three main periods of sediment accumulation: (i) from 10.8 cal kyr BP to 7.6 cal kyr BP the sediment was coarse, Si content was high (27%), the magnetic susceptibility was low and the presence of shell fragments all suggest a period of low continental input and the deposition site was shallow (i.e, lower sea level); (ii) from 7.5 cal kyr BP to 4.6 cal kyr BP the elevated ratios of Al/Ca (0.69 ± 0.08), Fe/Ca (0.27 ± 0.04), Sr/Al (31.57 ± 4.47) ×10?4, Cd/Al (0.09 ± 0.03) ×10?5 and Ba/Al (0.70 ± 0.16) ×10?4 are consistent with a period of maximum sea transgression and elevated influence of the nutrient-rich South Atlantic Central Water (SACW); (iii) from 4.5 cal kyr BP to the present, events of higher fluxes of TOC, Ni, Cu and Zn were observed from ca 3.2 cal kyr BP to 3.4 cal kyr BP, in both cores, related to humid climate. Overall, the multi-proxy approach shed light on the effects of climate and oceanographic variability on sediment input and accumulation in a less-studied portion of the Brazilian shelf, which are consistent with other shelf areas and with changes in regional climate systems like the Intertropical Convergence Zone (ITCZ), South American Monsoon Systems (SAMS) and South Atlantic Convergence Zone (SACZ).", "The mixture of different water masses can strongly influence the marine reservoir effect (MRE) in localities under the effect of coastal marine upwelling. The Cabo Frio region, on the southeastern Brazilian coast, is well known for its seasonal marine upwelling and for its rich landscape of Holocene shellmounds. In this kind of archaeological settlement, common on the southern and southeastern Brazilian coasts, marine mollusk shells are frequently used for radiocarbon dating and can represent a valuable tool in the study of MRE. On the other hand, terrestrial mollusks have proven to be an important alternative to represent the atmospheric carbon isotopic concentration. In this work we analysed the most frequent terrestrial and marine mollusk shells from the Usiminas shellmound, on Cabo Frio Island. The radiocarbon signal of marine shells from Pinctada imbricata (Röding, 1798), Ostreidae (Rafinesque, 1815), Cymathium parthenopeum (Von Salis, 1793), Leucozonia nassa (Gmelin, 1791), Lithopoma olfersii (Philippi, 1846), and that of terrestrial shells from Thaumastus achilles (Pfeiffer, 1852) and Megalobulimus terrestris (Spix, 1827), collected from the archaeological layers in the sequence, were measured and a value of 67 ± 33 14C yr was obtained for the local offset from the average global marine reservoir age. The effect of upwelling in this region and in its surrounding area is discussed.", "Southeastern Brazilian marine coastal deposits provide an excellent opportunity to investigate environmental changes such as sea level and trophic variability during the Holocene period. In this study, we present a sediment record from Arraial do Cabo Bay, Rio de Janeiro State. In order to improve the understanding of the upper subtidal palaeoecosystem evolutionary dynamics of this Bay, we provide a microfacies analysis of Holocene carbonate and mixed siliciclastic-carbonate deposits cropping out today from the supratidal to the subtidal zones. The age-depth model is based on 14C dating and revealed a basal age of ~ 7000 cal. years BP. In the six distinguished microfacies, the biogenic components are dominated by vermetids and coralline algae. A number of subordinate components are also present, including the microfacies determining thin-shelled bivalves. Fossil vermetids are represented by monospecific clusters of overgrowing Petaloconchus varians. Coralline red algae are represented by Lithophyllum pustulatum, Spongites fruticulosus, Spongites yendoi, Mesophyllum engelharti, and unidentified geniculate corallines. The microfacies analysis revealed that the substrate of the benthic community in the upper subtidal ecosystem of the Bay changed according to the relative sea level: (1) during the rapid sea transgressive trend it was coarse soft substrate, (2) after the postglacial sea level maximum succeeding a slow decline to present sea level it changed into fine soft substrate. At ~ 7000 years ago the coarse soft substrate was characterised by fruticose corallines and composed of quartz grains from continental run off input. After the postglacial sea level maximum the highstand elevation along with the established upwelling system brought about a predominantly carbonate deposition. Vermetids and corallines, along with thin-shelled bivalves, thrived in a low sedimentation rate setting and high nutrient level environment.", "Studies on mixed carbonatic and siliciclastic sedimentation on the Brazilian continental shelf have been used Foraminifera as bioindicators of carbonate productivity, marine currents, nutrient intakes, and environmental health. This work aim to investigate the recent sedimentary coverage and the Foraminifera assemblages of the equatorial outer shelf of Rio Grande do Norte State, between the Apodi-Mossoró and Piranhas-Açu incised valleys to understand the nutrient distribution and carbonate production. Statistical methods were used for the biotic data, in quantitative and qualitative values. granulometric analysis, CaCO3, and organic matter contents allowed to identify six sedimentary facies. The presence of Globigerina rubra, Quinqueloculina patagonica, and Peneroplis pertussus is related to the intrusion of ocean currents over the shelf break. The presence of Buccella peruviana is correlated with high CaCO3 and organic matter contents. The species of foraminifera mentioned above may indicate occurrence of oceanic phenomena such as tropical Gyre and upwelling. Diversity of symbiotic organisms and their correlation to abiotic are related to carbonate production and the pristine shelf environment.", "Here palynological assemblages are presented from channel surface sediment samples from the Caceribu, Guaraí and Guapimirim-Macacú rivers located in an important area of the Brazilian coast (Guanabara Bay, State of Rio de Janeiro), in order to provide information relevant for the interpretation of palaeoecological records. The data indicate the predominance of pollen types from the Atlantic Forest in all samples and a relatively low representation of mangrove pollen, suggesting distant (regional) fluvial transport. Avicennia and Rhizophora were represented in those samples closer to the intertidal zone, Rhizophora being the most important. It was possible to verify a marked difference in pollen concentration/deposition among the three rivers, probably related to the different hydrodynamic pattern of each river. A low concentration of palynomorphs occurred in the Macacú-Guapimirim River, resulting from its higher flow, and there was a high deposition of palynomorphs in the sediments of Guaraí River, in response to its isolation from the hydrographic Guanabara Bay basin. It was possible to verify other interesting data, such as low palynomorph concentration in samples from near the mouth and an increase of palynomorphs in the upstream samples, mainly due to the more active action of the tidal currents. Meanwhile, the increase in the total concentration of the palynomorphs in the upstream samples coincides with the maximum reach of the saline waters and their meeting with the internal flow of the rivers." ]

[ "Rifting and related normal stress regime in the equatorial continental margin of Brazil ceased during the Late Cretaceous, when the stress regimes in eastern South America and West Africa changed to induce strike-slip or reverse motion. In this study, we explore the postrift tectonic, geomorphic, magmatic, and sedimentary responses to stress changes using the Potiguar Basin, the easternmost basin in the equatorial margin of Brazil, as a case study. We use field and topographic data, 2D seismic reflection lines, vertical electric soundings, and geochronological and borehole data to constrain the stress evolution of the Potiguar Basin from the Late Cretaceous to the Quaternary, discussing the role of basin inversion on sedimentation and landforms. Our results indicate the presence of two strike-slip stress regimes after rifting. The first stress field (SF1) occurred from Late Cretaceous to the middle Miocene and consisted of a N-S-oriented maximum subhorizontal compression and an E-W-oriented extension. The second stress field (SF2) took place from the middle Miocene to the present day and included subhorizontal E-W to NW-SE compression combined with N-S and NE-SW subhorizontal extension. Emplacement of volcanic rocks occurred along transtensional faults, with a principal peak during SF1 at 20–30 Ma and a subordinate peak during SF2 at 5–10 Ma. In response to shortening during SF2, a 70-km-long and 50-km-wide dome formed, where marine Miocene strata were uplifted to ~250 m asl. This uplift induced the displacement of alluvial channels away from the dome. Anticlines formed by transpression along the main NE-SW-striking faults during both SF1 and ST2 acted as traps in the petroleum system. Similar shifts and stress field inversions documented in other areas of the Brazilian continental margin are consistent with the Neogene rise of the Andes and may have implications for reconstructing the tectonic history of the Equatorial Atlantic margin of South America." ]

[ "A1635" ]

[ "Fourteen years (September 2002 to August 2016) of high-resolution satellite observations of sea surface temperature (SST) data are used to describe the frontal pattern and frontogenesis on the southeastern continental shelf of Brazil. The daily SST fronts are obtained using an edge-detection algorithm, and the monthly frontal probability (FP) is subsequently calculated. High SST FPs are mainly distributed along the coast and decrease with distance from the coastline. The results from empirical orthogonal function (EOF) decompositions reveal strong seasonal variability of the coastal SST FP with maximum (minimum) in the astral summer (winter). Wind plays an important role in driving the frontal activities, and high FPs are accompanied by strong alongshore wind stress and wind stress curl. This is particularly true during the summer, when the total transport induced by the alongshore component of upwelling-favorable winds and the wind stress curl reaches the annual maximum. The fronts are influenced by multiple factors other than wind forcing, such as the orientation of the coastline, the seafloor topography, and the meandering of the Brazil Current. As a result, there is a slight difference between the seasonality of the SST fronts and the wind, and their relationship was varying with spatial locations. The impact of the air-sea interaction is further investigated in the frontal zone, and large coupling coefficients are found between the crosswind (downwind) SST gradients and the wind stress curl (divergence). The analysis of the SST fronts and wind leads to a better understanding of the dynamics and frontogenesis off the southeastern continental shelf of Brazil, and the results can be used to further understand the air-sea coupling process at regional level.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability.", "The rift phase of the Campos Basin developed during the Early Cretaceous on a heterogeneous crust comprising structures inherited from the Brasiliano-Pan African tectonic events, mostly generated during the Neoproterozoic-Cambrian amalgamation of western Gondwana blocks. The main rifting episode took place from the Hauterivian to the Barremian, then was succeeded by the transition and post-rift (SAG) phases during the Aptian. Rift faults developed as a result of a progressive rotation of extension from E-W to NW-SE. The role of pre-existing intra-basement structures on the style and evolution of the rift faults was investigated using 3D high-resolution seismic data, borehole logs and sidewall samples. Three seismic facies (SF1, SF2 and SF3) and three types of intra-basement structures (Surfaces, Geobodies and Internal Reflections) were identified and mapped. They represent, respectively, contrasting levels of seismic anisotropy, interpreted as metamorphic foliation, and ductile shear zones that bound rock units with particular seismic facies signatures. Sidewall cores show that banded biotite-gneiss is the predominant rock type in the eastern half of the study area, while more homogeneous granitoid is the dominant lithology on the west. Such a binary division of lithotypes is consistent with the distribution of mapped intra-basement seismic facies and features. The contrasting basement heterogeneity across the study area is the major control in the strain distribution during rifting. Where the basement is highly heterogeneous, the pre-existing fabric was selectively reactivated whenever its orientation was favourable, resulting in faults forming progressively as the extension direction rotates, whilst shallower low to very low angle basement fabric were cross-cut by rift faults. Where the basement is homogeneous, only early formed faults remain active throughout the rifting.", "This paper describes the history, challenges, solutions and evolution of the Floating Production Units in Brazil. The first floating unit was on stream in 1977 at Campos Basin in Brazil. It produced from a single well with a drilling riser and dry-X-tmas tree to a MODU converted into a floating production unit and exporting to a spread-moored shuttle-tanker by a floating hose. Now, more than 40 years later, over 2,400 meters of water depth at Santos Basin are moored several floating production and storage units (FPSOs). It houses over 40 thousand metric tons of complex topsides exploiting ultra-deep wells from the pre-salt prospects. Along the evolution of the FPSOs, one major stepping-stone was the implementation of lessons learned as a feedback to create a strong foundation. This paper will depict field demands and solutions adopted to deal with the differing climates and environments as well as other particularities to develop FPSOs in Brazil. To face the technological challenges to efficiently and safely produce from ultra-deep water complex pre-salt reservoirs required the consolidated use of the expertise and experience from past projects. Initially Petrobras was well known worldwide as a Semi-Submersible company, with a unique proficiency to develop converted Semi-submersibles and other new constructions. This expertise is still present to this day, but the company has since pioneered and consolidated the use of FPSOs worldwide, leading the industry in this concept. Petrobras led the industry effort to approve FPSO international standards, local regulations with agencies and regulatory bodies by the end of '80s to early '90s. This paper will focus on the evolution of this industry, highlighting the achievements, and address the new developments and opportunities for the future.", "The Southern Brazilian Coast is highly susceptible to storm surges that often lead to coastal flooding and erosive processes, significantly impacting coastal communities. In addition, climate change is expected to result in expressive increases in wave heights due to more intense and frequent storms, which, in conjunction with sea-level rise (SLR), has the potential to exacerbate the impact of storm surges on coastal communities. The ability to predict and simulate such events provides a powerful tool for coastal risk reduction and adaptation. In this context, this study aims to investigate how accurately storm surge events can be simulated in the Southwest Atlantic Ocean employing the coupled ADCIRC+SWAN hydrodynamic and phase-averaged wave numerical modeling framework given the significant data scarcity constraints of the region. The model’s total water level (TWL) and significant wave height (Hs) outputs, driven by different sources of meteorological forcing, i.e., the Fifth Generation of ECMWF Atmospheric Reanalysis (ERA 5), the Climate Forecast System Version 2 (CFSv2), and the Global Forecast System (GFS), were validated for three recent storm events that affected the coast (2016, 2017, and 2019). In order to assess the potentially increasing storm surge impacts due to sea-level rise, a case study was implemented to locally evaluate the modeling approach using the most accurate model setup for two 2100 SLR projections (RCP 4.5 and 8.5). Despite a TWL underestimation in all sets of simulations, the CFSv2 model stood out as the most consistent meteorological forcing for the hindcasting of the storm surge and waves in the numerical model, with an RMSE range varying from 0.19 m to 0.37 m, and an RMSE of 0.56 m for Hs during the most significant event. ERA5 was highlighted as the second most accurate meteorological forcing, while adequately simulating the peak timings. The SLR study case demonstrated a possible increase of up to 82% in the TWL during the same event. Despite the limitations imposed by the lack of continuous and densely distributed observational data, as well as up to date topobathymetric datasets, the proposed framework was capable of expanding TWL and Hs information, previously available for a handful of gauge stations, to a spatially distributed and temporally unlimited scale. This more comprehensive understanding of such extreme events represents valuable knowledge for the potential implementation of more adequate coastal management and engineering practices for the Brazilian coastal zone, especially under changing climate conditions.", "A passing cold front is the main modifying agent of the weather in Rio de Janeiro State and it can occur throughout the whole year, most frequently during winter. By using synoptic charts, satellite images and data collected through meteorological observations, this paper aims to analyses the evolution and transitioning of a frontal zone which has passed over the Ocean, nearby the Brazilian southeastern coast. This particular event was chosen due to is its high impact as well as the inefficiency of meteorology centers to forecast its occurrence. These specific baroclinic waves had a fast advancement, caused by the formation and persistence of a trough observed at medium levels but associated to trough at high levels and transitioning on the surface, thus making these baroclinic waves more intense and consequently, generating an squall line across the Rio de Janeiro City on the evening of 16th March 2015, when it was registered high levels of precipitation not provided.", "After the formalization of the base of the Miocene in the Lemme-Carrosio section (Italy) at the base of Subchron C6Cn.2n, the calcareous plankton biostratigraphy was refined in several open ocean Deep Sea Drilling Project/Ocean Drilling Program sites. However, high-resolution quantitative biostratigraphic studies, integrating planktonic foraminifera and calcareous nannofossils, are still lacking for the time interval spanning the Oligocene–Miocene transition. Here, we present a reinvestigation of Deep Sea Drilling Project Hole 516F (Rio Grande Rise) and 4 oil wells drilled by Petróbras Brasileiro SA in the Campos Basin (SW Atlantic Ocean). We identified 12 planktonic foraminiferal and 18 calcareous nannofossil bioevents that have been integrated with an updated magnetostratigraphy of Hole 516F allowing the correlation with the GPTS and the identification of the Oligocene/Miocene boundary (base of Subchron C6Cn.2n) between the Top of Sphenolithus delphix and the Base of common Paragloborotalia kugleri. Furthermore, our results give new insights on the reliability of major calcareous plankton events across the Oligocene–Miocene transition: (a) the Sphenolithus ciperoensis Top, the S. delphix Base and Top, and the Sphenolithus cometa Base are reliable events at a global scale; (b) the Bases of Globoquadrina dehiscens and Sphenolithus disbelemnos > 4 ?m are correlatable events only within the study sector of the SW Atlantic Ocean; and (c) the Globoturborotalita ciperoensis Top, Globoturborotalita angulisuturalis Top, and Sphenolithus procerus Base are diachronous. Finally, previously unreported biostratigraphic data, such as the distribution range of S. disbelemnos < 4 ?m and Sphenolithus cf. S. pseudoheteromorphus, the Tenuitellinata praestainforthi acme interval, and the Top of common Globigerinoides primordius were identified in the Campos Basin.", "With the expansion of oil exploration in deep waters, assessing the risks associated with offloading operations becomes essential in preventing accidents that may cause huge environmental disasters. In this paper, the system that composed of a turret-moored floating production storage and offloading (FPSO) connected to a conventional shuttle tanker, which is assisted by a tug boat to maintain its position during an offloading operation, will be studied. Using environmental data collected over a period of 6 years, from 2004 to 2009, from the Campos Basin in Brazil, the equilibrium positions of the system were calculated, considering its constraints (operational criteria defined by Petrobras) and verifying the stability of those equilibrium points. The hydrodynamic and aerodynamic static forces were calculated using models validated in the literature. Dynamic effects and oscillations are taken into account by adding safety margins to the operational sectors. With this analysis, we calculated the FPSO heading probabilities during an offloading operation and the expected downtime of operation in Campos Basin. We concluded that the downtime of the offloading operation with a conventional shuttle tanker is close to that with a dynamic positioned (DP) shuttle tanker (10% downtime). Furthermore, the results from the stability analysis were used to generate a simplified set of rules to classify the environmental conditions into four classes of operational risk by applying an unbiased decision tree. This method obtains practical rules based on measurements of wind, wave, and current, allowing the operator to quickly evaluate the risk level before starting the operation.", "The distribution of planktonic foraminifera in box-core tops under the influence of a western boundary upwelling system along the southeastern Brazilian continental margin was examined to evaluate the similarity percentage (SIMPER) and to create a biofacies model for paleoenvironmental applications. Species associated with warm and oligotrophic water were distributed in the Rio de Janeiro sector of the Campos Basin, while productive water species were most abundant in the Rio de Janeiro sector of the Santos Basin, and cold-water species were most abundant in the Cabo Frio Upwelling System (CFUS). Four major biofacies are associated with the oceanographic setting of the CFUS: one from the Campos Basin (A - Brazil Current front), one from the Santos Basin (B - mixture of coastal and oceanic waters), and two associated with the Cabo Frio High in the northern biofacies (C) and southern biofacies (D). The distribution of biofacies C and D was associated with temperature differences. Biofacies C represents a mixture of upwelling and tropical waters, while biofacies D represents a mixture of cold, nutrient-rich and Santos Basin waters. These biofacies were also defined in core CF10-01B, in which six main paleoceanographic phases were characterized during the last 9 cal kyr, predominantly showing alternating dominance between biofacies C and D From 9.0 to 5.0 cal kyr before the present (BP), the system was dominated by biofacies C. Between 4.0 and 3.5 cal kyr BP, biofacies D was dominant. Between 3.5 and 2.5 cal kyr BP, a strong influence of coastal waters and weakened upwelling activity were indicated by the dominance of biofacies B + C + D. The last 2.5 cal kyr was dominated by biofacies D. The SST in this core was reconstructed using the Modern Analog Technique (MAT), which revealed 0.35. °C of variability, indicating no SST changes during the Holocene. The weak sensitivity of the MAT was due to the interplay among different oceanographic features.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated." ]

[ "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin." ]

[ "A1097" ]

[ "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "We present new evidence for the existence of a large pockmark field on the continental slope of the Santos Basin, offshore southeast Brazil. A recent high-resolution multibeam bathymetric survey revealed 984 pockmarks across a smooth seabed at water depths of 300–700 m. Four patterns of pockmark arrays were identified in the data: linear, network, concentric, and radial. Interpretation of Two-dimensional multi-channel seismic reflection profiles that crosscut the surveyed area shows numerous salt diapirs in various stages of development (e.g. salt domes, walls, and anticlines). Some diapirs were exposed on the seafloor, whereas the tops of others (diapir heads) were situated several hundreds of meters below the surface. Extensional faults typically cap these diapirs and reach shallow depths beneath the seafloor. Our analysis suggests that these pockmark patterns are linked to stages in the development of underlying diapirs and their related faults. The latter may extend above salt walls, take the form of polygonal extensional faults along higher-level salt anticlines, or concentric faults above diapir heads that reach close to the seafloor. Seismic data also revealed buried pockmark fields that had repeatedly developed since the Middle Miocene. The close spatio-temporal connection between pockmark and diapir distribution identified here suggests that the pockmark field extends further across the Campos and Espírito Santo Basins, offshore Brazil. Spatial overlap between the pockmark field topping a large diapir field and a proliferous hydrocarbon basin is believed to have facilitated the escape of fluid/gas from the subsurface to the water column, which was enhanced by halokinesis. This provides a possible control on fossil gas contribution to the marine system over geological time.", "Campos Basin, the main production province in Brazil, was discovered in 1974. It is located on the North coast of the Rio de Janeiro State and comprises an area of around 115,000 km2 (28,400 acres), as shown in Figure 1. The producing oil fields are between 70 and 150 km (43 to 93 miles) far from the seashore. It started its production on August 13th, 1977 with 10,000 bopd (barrels of oil per day) from the well 1-EN-01-RJS, which produced to a semi-submersible platform; this well has produced nearly 35 million barrels of oil until February 1998, when it was shutdown for economical reasons. Today, after more than twenty-five years of continuous operation, the overall production system comprises 13 fixed platforms and 24 Floating Systems distributed among 42 oil fields, which account for the production of 1.21 million bopd - which corresponds to more than 80% of Petrobras oil production, plus 18.9 million m3 of gas per day - or 43% of the gas production (as of December 2002). Such an evolution was supported by investments in exploration and production development, in deepwater technology developments and in continuous management improvement. This paper describes the main driving forces to exploit Campos Basin - especially its deep and ultra-deepwaters fields, the technological and production developments performed, the experience accumulated by Petrobras along these 25 years of operations as well as its contribution to the global oil industry.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "The Campos basin is a sedimentary basin located in offshore Brazil, between the north coast of Rio de Janeiro State and the south coast of Espírito Santo State, encompassing many oilfields. Most of the reservoirs in the basin are high-permeability sandstones containing low API gravity oil but are without strong water drives. Long horizontal producer wells are the best economic option for field development but require water injection to maintain reservoir pressure. Horizontal sections generally range from 1000 to 2000m, which demands gravel pack as a sand control method. Gravel packing such long wells is a challenge and requires thoughtful engineering to optimize pumping techniques and technology. Presented here are best practices to overcome several challenges faced in this field to achieve overall success. The challenge for extended-reach gravel packing is that the long horizontal section develops high friction during the alpha and beta wave propagation. Increasing the pumping pressure to overcome this friction increases the risk of fracturing the formation, consequently reducing the equivalent circulation rate downhole impairing the proppant transportation. In contrast, a reduced pump rate during alpha wave propagation can lead to a premature screenout due to the increase in dune height of over 85%. To overcome these issues and place gravel packs in these wells, careful engineering and simulation, lightweight proppants, friction reducers, and thorough job planning were used to successfully perform gravel packs in more than 40 horizontal wells completed in the Campos basin from 2011 up to 2017. The experience of pumping the longest gravel pack jobs in offshore Brazil (horizontal length more than 2,000m) offer insights into best practices for gravel packs in extended-reach horizontal wells: Design considerations, specific well challenges faced, technologies deployed, and operational planning requirements. Specifically, highlighting the benefits of using lightweight proppants and optimized fluid systems to minimize screen out risks and maximize pack efficiency.", "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "A panoramic view of Petrobras activity offshore Brazil focusing on the Campos Basin's early and permanent production systems, the capability of Brazilian engineering and industry to overcome the challenge of producing oil and gas from the sea, as well as forecasting the performance of the Brazilian state oil company.", "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns.", "As new oil fields are discovered downslope on the largest Brazilian oil region, Campos Basin, situated on the shelf break and continental slope of eastern South America, new oceanographic challenges are continuously encountered by oceanographers and engineers involved in the design, installation and production of oil field ranging from water depths between 500 to 2000 m. The surface flow in the region is dominated by the Brazil Current, the counterpart of the Gulf Stream as the western boundary current of the South Atlantic gyre. The deep water flow is very complex with different layers of counter currents associated with the rich structure of water masses on this region. This paper discusses the attempts made by PETROBRAS to study the complex flow in the region and produce oil under the harsh environment of deep continental slope regions. Results of oceanographic measurements are presented to build a reliable metocean design basis for this region of the South Atlantic Ocean where there is a lack of long term data measurements." ]

[ "This paper aims to report the production management of domestic shipyards, with the inclusion of the national fleet renewal program. The study addresses how domestic production may or may not leverage its business and promote sustainable growth of the national shipbuilding industry. The largest national power generation company, Petrobras, began a program in 2008 to renew the fleet of marine support. This program included the construction of 146 offshore support vessels in Brazilian shipyards. With this, the Brazilian government promoted the revitalization of the national shipbuilding industry by introducing this segment in its Growth Acceleration Program (PAC) and decided that shipbuilding should have local content in its production." ]

[ "A485" ]

[ "This case focuses on the challenges regarding capacity building required to meet the huge increase of manpower demand by the offshore and shipbuilding sectors in Brazil and Rio Grande do Sul state. This arises from four key factors: end of monopoly of exploration and production of oil and gas in 1997, expanding the Brazilian offshore market; the Local Content policy adopted since 1999; national programs to stimulate the maritime industry such as the Fleet Modernization and Expansion Program created in 2004 to renew the fleet of Transpetro, a Petrobras subsidiary; and the expansion of Petrobras investments, partly due to the discovery of giant oil reserves in the Pre-salt layer in Brazil, in 2006. Since 2010, annual investments from Petrobras have reached US$ 40 billion/year, more than ten times the yearly investment in the 1997-2001 period. Consequently, offshore clusters have been developed in the country to build platforms, drilling ships and supply vessels, demanding massive training. In Rio Grande do Sul, three big shipyards and modules producers have installed. In this context, government created in 2003 the National Oil and Natural Gas Industry Mobilization Program (Prominp) and the National Plan of Professional Qualification (Pnqp) in 2006. Until 2013, circa US$ 120 million were invested to train nearly 100.000 people in 185 trades at several levels. In the state, training has been provided mainly by SENAI-RS, the state branch of the National Service of Industrial Apprenticeship, linked to the Federation of the Industries of Rio Grande do Sul. The large-scale actions undertaken for training have not been efficacious enough to meet the needs. Studies and discussions have raised factors that impact on shipyards' productivity and competitiveness. We consider alternatives to develop talents to accelerate the learning curve, anchored in the following axes: SENAI methodology for professional training; pre-selection of people according to specific abilities; the concept of a \"Living Lab\" training environment; familiarizing workers with productiveness indicators; efficient management paradigm; workers training aligned with the project repeatability principle. The local industry must be internationally competitive when the local content policy ends and labour productivity plays a crucial role in this aspect.", "BR Petrobras plans to spend $224 billion through 2014 to develop deepsea oil finds. Supplying equipment in a timely fashion will be key to its efforts to nearly double oil production in Brazil by 2020. Brazil's government wants the majority of the cash headed to local companies or local units of foreign multinationals and wants to develop the oil services sector, creating industry that could export goods and services around the world. Thus, gradually, the minimum local content requirements will increase up to 95% in 2017. Whoever wishes to have a major role in the E&P will have to establish significant local presence, in particular equipment suppliers (topsides, pipes, drilling packages, power packages for offshore units, etc.), who will likely need to build production facilities in Brazil. The issue is not only to install local manufacturing support, but also pre-sales technical support, a presence close to the shipyards and operators throughout the phase of integration, commissioning and operation, and a very strong and effective after-sale support. The paper will discuss the overall strategy needed to bring to Brazil the technical and manufacturing expertise to support the rapid growth of the shipbuilding industry and will examine the importance of providing local support to the yards and owners to reduce delays in technical proposal and during the construction phase of vessels. Honeywell has set up, in addition of its already existing operations, a Marine operation in Rio de Janeiro. This unit includes: • Front End Engineering Desing (FEED) • Customer Engineering Project Support • Technical sales support • Installation & Commissioning support. • Service Station • Local spare part inventory. Consideration will also be given to a study being run by Honeywell to implement an assembly line in Brazil to minimize logistics costs and delivery times.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "The establishment of policies relevant to the oceanic area in Brazil aims to guide the rational planning of resources of marine space (Blue Amazon), ensuring the quality of coastal population life and the effective protection of ecosystems and resources within it. Therefore, it appears as a major factor in the formalization of coastal and marine policies and, especially, in the training of human resources to work in the area. The concern of political regulation of the Brazilian government with the use of marine resources and coastal areas emerged in the 1970s, parallel to the emergence of an environmental viewpoint in state planning held in the country. The Special Department of Environment of the Presidency was created in 1973, which was a significant milestone in its institutional history. A year later, the Inter-Ministerial Commission of Sea Resources was created, aimed at coordinating issues that would lead to a national policy for the coastal region of Brazil. However, only with the Constitution of the Federative Republic of Brazil ratified in 1988, and with the ratification of the country to the United Nations Convention on the Law of the Sea in 1994, did the legal issues related to marine environment areas take form and effect.", "This paper describes the history, challenges, solutions and evolution of the Floating Production Units in Brazil. The first floating unit was on stream in 1977 at Campos Basin in Brazil. It produced from a single well with a drilling riser and dry-X-tmas tree to a MODU converted into a floating production unit and exporting to a spread-moored shuttle-tanker by a floating hose. Now, more than 40 years later, over 2,400 meters of water depth at Santos Basin are moored several floating production and storage units (FPSOs). It houses over 40 thousand metric tons of complex topsides exploiting ultra-deep wells from the pre-salt prospects. Along the evolution of the FPSOs, one major stepping-stone was the implementation of lessons learned as a feedback to create a strong foundation. This paper will depict field demands and solutions adopted to deal with the differing climates and environments as well as other particularities to develop FPSOs in Brazil. To face the technological challenges to efficiently and safely produce from ultra-deep water complex pre-salt reservoirs required the consolidated use of the expertise and experience from past projects. Initially Petrobras was well known worldwide as a Semi-Submersible company, with a unique proficiency to develop converted Semi-submersibles and other new constructions. This expertise is still present to this day, but the company has since pioneered and consolidated the use of FPSOs worldwide, leading the industry in this concept. Petrobras led the industry effort to approve FPSO international standards, local regulations with agencies and regulatory bodies by the end of '80s to early '90s. This paper will focus on the evolution of this industry, highlighting the achievements, and address the new developments and opportunities for the future.", "In the presence of the President of the Republic, Luiz Inácio Lula da Silva, the BrasFels S/A shipyard launched to the sea the $(US)1 billion P-51, the first semi-submersible platform built entirely in Brazil. Ordered by Petrobras, the unit is programmed to operate in the Marlim Sul field, Campos basin, state of Rio de Janeiro with 75% of the goods and services applied to the construction provided by Brazilian companies. In 2010, the P-51 will reach its maximum operating capacity of 180,000 bpd of petroleum and 6 million cu m/day of gas. The P-51 will provide about 8% of the national petroleum production. The P-51 will be strategic with respect to increasing the supply of gas to Brazil under Plangás (Plano de Antecipação da Produçäo de Gás Natural). The P-51 is also part of the PDET (Plano Diretor de Escoamento e Tratamento) of the Cuenca basin. Of the 6 million cu m/day of gas produced, a part will be for internal consumption in the P-51 such as fuel to generate electricity and the rest will be sent to dry land. Brazil wants a naval construction base that will supply the needs of Brazil and the entire world. The P-51 will be anchored in the Marlim Sul field of 1,255 m depth 150 km offshore and will be connected to 19 wells (10 producing oil and gas and 9 injecting water) and will produce 22° API. The 9 water injection wells will inject 282,000 bpd of water. Energy use will be 100 Mw, enough energy to light a city of 300,000 persons. The patroness of the P-51 platform was the First Lady of Brazil, Marisa Letícia Lula da Silva.", "Brazil is entering the age of decommissioning, with aging offshore fields that have been in operation for more than 25 years. Brazil has migrated from an operator's monopolistic environment (with the state owned oil company, Petrobras) to a new reality in which many companies, national and international operate in Brazilian waters. As part of this new reality, Brazil has established government organizations whose aim is to coordinate the exploitation of Brazil's natural resources with the intent of optimizing activities while protecting the environment in an ever increasingly complex eco-system management. Traditionally, offshore projects follow basic phases such as conceptual, front end engineering and design (FEED), detail design, construction and commissioning. Cost allocation and schedules for these phases are all associated with production estimates and return on investment estimates. In many instances, internationally, planning for decommissioning has been deferred to an unforeseen future. Finally that far off horizon has become a reality, and domestic and foreign operators in Brazil are going through a new decommissioning awareness phase. It is the author's opinion that operators wish to comply with a well-defined frame of Brazilian and international regulations. In general, this paper aims at examining the existing regulatory environment and make recommendations on a path forward for: • Clear-cut requirements so that the permitting process flows with a minimized review cycle; • A clear set of rules, defining what abandonment options exist (e.g. complete removal vs. partial removal, on-site abandonment rules for topsides and subsea infrastructure); • A clear set of rules defining fines and sanctions for environmental violations The objectives of this paper are to 1) Gather basic information on the current status of the Brazilian Rules and Regulations, 2) Help non-government entities work together to accomplish the goals set forth by Brazilian lawmakers and officials, and 3) Develop a roadmap for convergence of the environmental agency and project stakeholders. Laws, rules and regulations, and international treaties of which Brazil is signatory are part of this environment.", "Brazil has a transport system with little presence of intermodality and use of Short-Sea Shipping. Nevertheless, these are goals for Brazilian waterborne transportation matrix, which is expected to exceed 13% going to 25% in 2025. Currently, Brazilian transportation matrix isn't balanced surpassing that of other countries in the use of the highway, where approximately 63% of the total cargo is transported. The aim of this paper is to make a diagnosis on the investigative potential use and improvement of Short-Sea Shipping in Brazil. To base this effect, we present a new concept of \"fast coastal terminals\", its conceptual model and potential gains in an intermodal transportation network.", "In passive continental margins, the brittle reactivation of shear zones and their role in the deformation and deposition of sedimentary basins are still a matter of debate. In this research, we investigated the role of the brittle reactivation of Precambrian shear zones in the nucleation of rift and postrift faults in the onshore portion of the Sergipe-Alagoas and Pernambuco basins in northeastern Brazil. We combine and interpret a dataset of aeromagnetic and topographic data, associated with reflection seismic and borehole data, to analyze the evolution of a portion of the Atlantic continental margin of Brazil. Our results indicate that in the crystalline basement, the magnetic lineaments are correlated with ductile structures as shear zones, and the continuity of these lineaments in the Sergipe-Alagoas and Pernambuco basins is interpreted as the shear zones below the sedimentary cover of these basins. We document the following phases of the brittle reactivation of basement shear zones: (1) the opening of the South Atlantic Ocean in the Early Cretaceous under an extensional stress regime and (2) tectonic inversion induced by the Mid-Atlantic Ridge push and the Andean Cordillera rise in the Neogene-Quaternary under a predominantly strike-slip stress regime. During the rift phase, the brittle reactivation of the shear zones controlled the locations and architectures of the rifts. These structures acted as zones of weakness and were reactivated as normal faults. The brittle reactivation of shear zones was still active during the postrift phase and was responsible for the development of compressional structures. The reverse faulting and related folding pattern indicate tectonic inversion in the Late Cretaceous-Cenozoic. The structures formed during the postrift phase under a strike-slip regime are consistent with the present-day stress field, indicating that tectonic inversion is an active phase of the Brazilian margin.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water." ]

[ "The Miocene Pirabas Formation is of strategic importance for the hydrocarbon industry since it represents the onshore portion of larger offshore basins of Northern Brazil, including the Foz de Amazonas, the Pará-Maranhão, Barreirinhas, Ceará, and the Potiguar basins of the equatorial margin of South America. The Pirabas Formation from the Aricuru outcrop (Pará State) is a shallow-water mixed siliciclastic-carbonate deposit, comprising highly bioturbated wackestone and packstone. However, the impact of these biogenic structures on the reservoir quality of this formation has been overlooked. Here, our results show that pervasive Thalassinoides penetrating the rock matrix, result in remarkably improved porosity and permeability, thus, turning the Pirabas Formation in extremely favorable strata for fluid flow and storage. Since these bioturbated layers are likely to be common in the sub-surface counterparts of this formation, the hydrocarbon potential of these deposits is probably higher than previously expected. Also, considering that the offshore basins of Northern Brazil are directly related to the breakup of the African and American plates during Aptian-Albian, the exploratory interest in the correlated Guinea Gulf (Jubilee play) and French Guiana-Suriname Basin (Zaedyus play) need to be reconsidered. Overall, the results of this research highlight the importance of integrating ichnological datasets with reservoir characterization studies for more accurate reservoir quality assessments." ]

[ "A1670" ]

[ "The Barreiras Formation records continental-to-shallow–water marine sequences deposited during the Paleogene–Neogene periods in the Brazilian continental margin. In northern Rio de Janeiro and southern Espírito Santo states, the Barreiras Formation preserve alluvial depositional system. The sediments were derived from a source located in the hinterland of the southeastern Brazilian continental margin, where rocks formed or reworked notably during the Gondwana supercontinent assembly are exposed. Detrital zircon U–Pb ages are mostly late Neoproterozoic, dominantly close to 608 Ma. Source rocks of this age occurred within the Ribeira and Araçuaí belts and were formed during their main magmatic activity. U–Pb zircon age distribution is similar to the southern and central Ribeira belt. Zircon fission-track ages occur in four main groups, between 429 and 358 Ma, 351 and 274 Ma, 270 and 171 Ma, and 167 and 127 Ma. Complex variation in the detrital zircon fission-track ages is related to the continental crust thermal evolution in the source areas. Older ages also occur between 534 and 433 Ma (Cambrian-to-Silurian periods) and are chrono-correlated to post-orogenic processes after the Gondwana supercontinent agglutination. Zircon fission-track ages between 429 and 274 Ma (Silurian to Permian periods) are related to the formation of the Pangea supercontinent, whereas the predominant zircon fission-track age group, between 270 and 171 Ma (Permian to Jurassic periods), is chrono-correlated to both orogeneses in the Gondwana supercontinent west margin and the Pangea supercontinent breakup. Zircon fission-track ages from 167 to 127 Ma are in the same period as the opening of the North and South Atlantic oceans. Data indicate that the thermal evolution of the source region either during the Gondwana supercontinent and South America Platform stages is complex.", "Martin Vaz Archipelago is located at the parallel 20°S, 1200 km away from the Brazilian coastline and is composed of Plio-Pleistocenic alkaline rocks that represent the last volcanic event of the Vitória-Trindade Ridge. The Archipelago is divided into three main units: Pico das Gaivotas Unit (i) is made up of nosean-phonolite and phono-tephrite domes and tephri-phonolite dykes with clinopyroxene, nosean and potassic feldspar phenocrysts, and scarce kaersutite anhedral phenocrysts; the Bandeira Unit (ii), in turn, comprises melanephelinitic and basanitic lava flows with olivine and clinopyroxene (diopside) phenocrysts; and lastly, the Basal Unit (iii) is composed of pyroclastic deposits with tuffs, lapilli-tuffs and lapillite. The clinopyroxene phenocrysts from Pico das Gaivotas and Bandeira Units have anhedral green cores with sieved and poikilitic textures and show reaction rims composed of opaque minerals, indicating disequilibrium and compositional changes in the liquid. This study provides mineral chemistry data indicating that clinopyroxene rims are more primitive (Mg# 57.46–84.12) and enriched in Al–Ti–Fe3+-Ca compared to the Fe-rich green-cores, probably related with a more primitive Ca-rich magma input in the magmatic chamber after the green-core crystallization from a different liquid. Olivine crystals from Bandeira Unit show resorption features and no compositional affinity with the analyzed liquid, indicating that these crystals have a xenocrystic origin from mantle peridotitic source. Clinopyroxene geothermobarometry data suggest different pressure and temperature conditions for cores and rims during crystallization, reflecting a polybaric evolutionary history. Pico das Gaivotas Unit clinopyroxene phenocrysts suggest a particularly higher-pressure environment, and a complex evolutionary history.", "Geologic events related to the opening of the South Atlantic Ocean deeply influenced the sedimentary record of the Araripe Basin. As consequence, upper stratigraphic units of the basin record a marine ingression in northeastern Brazil during the late Aptian. The timing and stratigraphic architecture of these units are crucial to understand the paleogeography of Gondwana and how the proto-Atlantic Ocean reached interior NE Brazil during the early Cretaceous. This marine ingression is recorded in the Araripe Basin as the Romualdo Formation, characterized by a transgressive-regressive cycle bounded by two regional unconformities. In the eastern part of the basin, the Romualdo depositional sequence comprises coastal alluvial and tide-dominated deposits followed by marine transgressive facies characterized by two fossil-rich intervals: a lower interval of black shales with fossil-rich carbonate concretions (Konservat-Lagerstätten) and an upper level with mollusk-dominated shell beds and shelly limestones. Following the marine ingression, an incomplete regressive succession of marginal-marine facies records the return of continental environments to the basin. The stratigraphic framework based on the correlation of several sections defines a transgressive-regressive cycle with depositional dip towards southeast, decreasing in thickness towards northwest, and with source areas located at the northern side of the basin. The facies-cycle wedge-geometry, together with paleocurrent data, indicates a coastal onlap towards NNW. Therefore, contrary to several paleogeographic scenarios previously proposed, the marine ingression would have reached the western parts of the Araripe Basin from the SSE.", "Based on the evolution of the tectonic plate and pregeography, the passive continental margin basins on the east coasts of Brazil experienced three prototype phases. Berremian intracontinental rift megasequence in lower cretaceous, comprising lacustrine sediments overlying Neocomian basalts, Aptian intercontinental rift basin, in which the laqoon transitional megasequence deposited, including two sedimentary units:the lower, mostly composed by carbonate and the upper represented by halite, and the drift phase, passive continental margin basin from Albian until the present-day, deposited with the marine megasequence. The Lower Cretaceous lacustrine calcareous black shale is the main source rocks of the giant oil and gas fields. The reservoirs include two sects:lower laqoon carbonatea nd upper, Tertiary and Cretaceous turbidites. The carbonate reservoirs is sealed by halite, while the turbidites are preserved by marine shale. The lower Cretaceous lacustrine source rocks starts to generate the oil and gas from Eocene-Miocene formed \"double insurance\" type models of giant oil and gas fields. If no salt windows existing, hydrocarbons migrated vertically along faults and are trapped mainly in the pre-salt carbonates. If salt windows exiting, hydrocarbons are accumulated in Upper Cretaceous-Tertiary turbidites which are packaged by marine facies shale.", "The current research was performed in the eastern portion of the Marlim oilfield to identify the hydrocarbon-generating potential of the Albian-Oligocene sequences (Macaé Group, Ubatuba and Carapebus formations) in the Campos Basin, Brazil. On the basis of petroleum geochemical proxies, an integrated approach was developed using source rock characterizations to establish the distribution of source rock properties, such as organic matter content, hydrocarbon-generating potential, thermal maturity and stratigraphic thickness. The outcomes of a comprehensive petroleum geochemical characterization were integrated with cuttings and core sample descriptions, biostratigraphic controls, well log analyses and 2-D/3-D seismic interpretations. Our results reveal that for the Albian-Oligocene deposits, the key geochemical properties required to develop hydrocarbon source kitchens converge in specific locations, demonstrating a variable hydrocarbon potential ranging from poor to excellent and suggesting the existence of local generation pods in the central and principally northern portions of the research area. The accumulation and preservation of the organic matter were influenced by the paleo-topography and tectonic controls, and the lowest concentrations of organic carbon were attributed to significant siliciclastic dilution taking place mostly toward the middle and southern portions of the Eastern Marlim oilfield. Lateral variations in both the lithofacies and organic facies are the main conditions controlling the behavior of the petroleum potential in the investigated sediments. Our results indicate that the Macaé Group has sufficient source-rock potential, maturation patterns, and hydrocarbon-generating potential to be considered as an active source rock in the Eastern Marlim oilfield, where the petroleum geochemical properties converge and are adequate to generate hydrocarbon compounds. In addition, the Ubatuba and Carapebus formations are also likely to generate oil and/or gas, but due to their relatively low maturity, it is difficult to establish that these rocks can be active source rocks in the study area.", "Foraminifera have demonstrated to be a good proxy of climatic changes during the Cenozoic for their high preservation in the sediment and quick responses to environmental changes. The aim of this study is to identify climate changes and the variation of marine influence during the Late Holocene, in Piraquê-Açu River Estuary (ES, Brazil). The study was based on the characterization of benthic foraminifera assemblages, ?13C and ?18O data in Ammonia tepida tests and the PA05 (2411 B.P.) and PA20 (1632 B.P.) cores. A total of 16 benthic foraminiferal species were identified in the cores. Some of them are characteristic from continental shelf environment (e.g. Lagena spp., Spiroloculina eximia, Oolina spp., Pyrulina gutta, Cibicidoides variabilis) and four are typical estuarine species (Ammonia parkinsoniana, A. tepida, Cribroelphidium excavatum and Bolivina striatula). The results allow us to identify four colder periods in the sedimentary record such as: the end of Iron Age (? 1000 B.C.), Greek Dark Ages (?450 B.C. - 100 B.C.), Dark Ages (?250 A.D. - 550 A.D.) and the Litter Ice Age (?1200 A.D. and 1850 AD.). In these periods the estuary showed an increase in confinement, which can be seen by the reduction in ecological indexes values and by the presence of only typically estuarine foraminifera species. Four warming periods were recorded in the sedimentary sequence: Greek Warming Period (? 900 B.C. - 450 B.C.), Roman Warming Period (? 50 A.D. - 250 A.D.), Medieval Warming Period (?550 A.D. - 1200 A.D.), and the fourth event represents the warming that started since the beginning of 19th Century. During warming events, the ecological indexes show higher values and species of marine habit were more constant in the sedimentary record.", "In the northernmost of Rio Grande do Sul coastal plain, southern Brazil, the first comparative palynological study of the sedimentary profiles of two present-day Atlantic rainforests was conducted in Torres municipality: Pirataba forest (29°15? S, 49°51? W), 17 km from the coastline, and Faxinal forest (29°21? S, 49°45? W), 2 km from the coastline. Ten radiocarbon dates and additional grain influx diagrams allowed for a more accurate analysis. The results suggested that regional and local events affected the northern coastal plain vegetation. The inner coastal plain of the Pirataba site was characterized by a cold, dry regional climate and a small number of pioneer forest species at the end of the last glacial stage (24,000–10,000 BP); a regionally variable temperature increase with slightly humid and dry phases in the early/mid-Holocene (10,000–6700 BP); and regional high temperature and humidity, and expanding Atlantic rainforests, in the mid-Holocene (6700 BP onwards). Near the coastline in the Faxinal site, the following were detected: marine transgression and damage to herbaceous marsh plants, and elevated temperature in the mid-Holocene (7000–6700 BP); regional marine regression, gradual soil desalination and scarce herbaceous marsh in the mid/late Holocene (6700–3500 BP); and regional high temperature and humidity, with forest expansion over the desalinated herbaceous marsh in the late Holocene (3500 BP onwards). The Pirataba and Faxinal forests expanded because of the high temperatures, an even greater increase in regional rainfall, and improved soil conditions at the end of the late Holocene (1500 BP onwards). The hydrosere occurring due to a water reservoir in Faxinal highlights the importance of preserving the lacustrine bodies of the region as generators of coastal forests.", "The Albacora field, located in Campos Basin, offshore Brazil, was discovered by PETROBRÁS in 1984. Following the discovery, a 7000Km 3-D survey was recorded, in the search for a better understanding of the field. At least three distinct families of reservoirs were identified in the area, ranging in age from Cretaceous (Albian-Cenomanian) to Miocene. The reservoirs are turbidites of two basic types: loose sands with a complex areal distribution, in the Tertiary accumulations; and more cemented sandstones, with a simpler distribution, in the Cretaceous accumulation. In a great part of the area, the reservoirs are interbedded with higher acoustic impedance rocks. The clear 3-D seismic definition of the reservoirs, as a rule, allows a detailed stratigraphic (as well as structural) interpretation. For the Oligocene and Miocene pools, seismic amplitude mapping, carried out in an interactive workstation, provided a surprisingly good picture of the turbidites distribution, considering the target depths (236D-2645m). Most well locations in the field, after the 3-D interpretation, were chosen with the help of the seismic amplitude maps. Special geologic features, such as channel facies and lobe-type deposits, were identified on the amplitude maps, and later confirmed by core and well log data interpretation.", "The Cretaceous Bauru Group of the Paraná Basin in Brazil is a widespread continental unit well known for its vertebrate and invertebrate fossiliferous content. The São Carlos Formation is an exception among its distinct and dominantly reddish siliciclastic units, which are otherwise devoid of palynomorphs. It includes an unique unit, the Ibaté Bed, which corresponds to the lower interval of the Fazenda Nossa Senhora de Fátima Member (FNSF Mbr) and is represented by a dark grey organic silty-argillaceous rhythmite with a rich palynoflora. These rocks are the main focus of this study. Samples were collected from the type section of the formation that is located in the central area of the São Paulo State. Identified palynomorph types are as follows: 32 pteridophyte spore taxa, 31 gymnosperm pollen taxa and 64 angiosperm pollen taxa. Acritarchs, prasinophytes and phytoclasts were also recognized. Seven new taxa are proposed: Anacolosidites eosenonicus sp. nov., Leiosphaeridia ibateensis sp. nov., Stellatia gen. nov., Trichomites brevifurcatus gen. et sp. nov., Trichomites duplihelicoidus gen. et sp. nov., Trichomites simplex gen. et sp. nov. and Tricolpites joelcastroi sp. nov. In quantitative terms, the ephedroid pollen grains – e.g., Equisetosporites, Gnetaceaepollenites and Steevesipollenites – are predominant. Their occurrence associated with Classopollis grains suggest a warm climate tending towards dryness. Some levels are relatively rich in pteridophyte spores, suggestive of contribution from lakeside vegetation. The permanent presence of freshwater is attested by conspicuous microalgal remains (Botryococcus, Pediastrum, Staurastrum and prasinophycean phycomata), recognizable via fluorescence microscopy. Significant amounts of microalgal remains in some samples suggest episodic blooms in the lake, probably induced by eutrophication. The Ibaté Bed corresponds to a depositional scenario involving a distal lacustrine environment with low-oxygen conditions in its bottom waters. As observed in offshore Brazilian basins, the presence of Anacolosidites eosenonicus sp. nov., combined with the absence of Steevesipollenites nativensis, indicates a late Santonian age for the bed (ca. 84 Ma). Other associated index-palynomorphs are compatible with this time assignment, which is reinforced by the presence of carbonized sclereids that are associated with the “Great Santonian Wildfire” recorded in coeval marine offshore strata of the Campos and Santos basins. The FNSF Mbr is stratigraphically related to the uppermost part of the Adamantina and Uberaba formations of the Bauru Group. Among all known Brazilian Late Cretaceous palynological continental records, this is the richest one ever detected. Although Late Cretaceous in age, the composition of the Ibaté Bed palynoflora reflects better the mid Cretaceous ASA Paleophytogeographic Province.", "Studies on mixed carbonatic and siliciclastic sedimentation on the Brazilian continental shelf have been used Foraminifera as bioindicators of carbonate productivity, marine currents, nutrient intakes, and environmental health. This work aim to investigate the recent sedimentary coverage and the Foraminifera assemblages of the equatorial outer shelf of Rio Grande do Norte State, between the Apodi-Mossoró and Piranhas-Açu incised valleys to understand the nutrient distribution and carbonate production. Statistical methods were used for the biotic data, in quantitative and qualitative values. granulometric analysis, CaCO3, and organic matter contents allowed to identify six sedimentary facies. The presence of Globigerina rubra, Quinqueloculina patagonica, and Peneroplis pertussus is related to the intrusion of ocean currents over the shelf break. The presence of Buccella peruviana is correlated with high CaCO3 and organic matter contents. The species of foraminifera mentioned above may indicate occurrence of oceanic phenomena such as tropical Gyre and upwelling. Diversity of symbiotic organisms and their correlation to abiotic are related to carbonate production and the pristine shelf environment." ]

[ "Global aquaculture production in 2017 (animals and plants) was recorded as 111.9 million tons, with an estimated firstsale value of $249.6 billion. Since 2000, world aquaculture has ceased to enjoy the high annual growth rates of the 1980s and 1990s (11.3 and 10.0 per cent, respectively). Nevertheless, it continues to grow at a faster rate than other major food production sectors. Annual growth declined to a moderate 5.8 per cent during the period from 2000 to 2016, although double-digit growth still occurred in a small number of countries, in particular in Africa, from 2006 to 2010. Fish produced by this rapidly growing sector is high in protein and contains essential micronutrients, sometimes essential fatty acids, which cannot easily be substituted by other food commodities. The United Nations predicts that the global population will reach 8.5 billion in 2030. This will inevitably increase the pressure on food sectors to increase production and reduce losses and waste. Production increases must be able to ensure sustainability, given a context in which key resources, such as land and water, are likely to be scarcer and the impact of climatic change will intensify. The aquaculture sector is no exception. Success in achieving the long-term goal of economic, social and environmental sustainability of the aquaculture sector, so as to ensure its continued contribution of nutritious food to keep the world healthy, will depend primarily on continued commitments by Governments to provide and support a good governance framework for the sector. As the sector further expands, intensifies and diversifies, it should recognize relevant environmental and social concerns and make conscious efforts to address them in a transparent manner, backed by scientific advice." ]

[ "B2418" ]

[ "Population growth and demographic changes Although the global human population increased from 7 billion in 2011 to 7.7 billion in 2019, the growth rate has been steadily decreasing, from 2.1 per cent in 1968 to 1.08 per cent in 2019. Projections of global population growth suggest an uneven but continuing increase, at a lower rate of change, to a mean population size of 9.7 billion by 2050. The decrease in the growth rate is associated with declining numbers of births and, combined with lower mortality rates and increasing longevity associated with increasing health standards, means that the average age of the global population is rising (Baxter and others, 2017). The number of international migrants has increased from 2.8 per cent of the global population in 2000 to 3.5 per cent in 2019 (United Nations, Department of Economic and Social Affairs, Population Division (UNDESA), 2019a). Most migrations have occurred between countries within the same region, with the exception of North America and Oceania, where, 97.5 per cent and 87.9 per cent, respectively, of international migrants were born in another region (UNDESA, 2019a). More than 600 million people live in coastal regions that are less than 10 m above sea level, and nearly 2.5 billion people live within 100 km of the coast (UNDESA, 2019b). Those regions are experiencing higher rates of population growth and urbanization than inland regions (Neumann and others, 2015). Such growth has resulted in many economic benefits to coastal regions, including improved transportation and increased trade, tourism and food production, as well as social, recreational and cultural benefits (Clark and Johnston, 2017). However, as the population in those regions grows, it is placing ever more pressure on coastal ecosystems. The extent to which an increasing global population places pressures on the marine environment varies and depends on a variety of factors, including where and how people live, the amount that is consumed and the technologies used to produce energy, food and materials, provide transport and manage the waste produced. The implications of changes to the global population on coastal regions, the use of marine resources and the generation of waste are described in detail in chapter 8 and Part 5.", "Within coastal regions, projections under shared socioeconomic pathways estimate a 71 per cent increase in the global human population across the period 2000–2050 to over 1 billion, as a result of overall global population growth as well as migration into those areas (Merkens and others, 2016). Under the same scenarios, populations in low-density to medium-density areas (<1,000 persons km2) are projected to decline, while those in higher-density areas are projected to increase (Jones and O’Neill, 2016), with an expansion of urban footprints in high-density areas and an increasing strain on associated infrastructure. How and where global populations live and their associated impacts on the environment will be influenced by climate change in many ways. As areas become increasingly unliveable as a result of declining precipitation, increasing temperatures, sea level rise and the loss of ecosystem goods and services, people will redistribute themselves to more liveable regions, increasing urban footprints in those regions. As the global population ages and overall growth slows, the size of the labour force is expected to decline, with an impact on the global economy. It is estimated that the global population considered to have the highest proportion of contributors to global economies, namely the population aged 20–64, will grow less than half as fast over the period 2015–2040 compared with the previous 25 years, while the population over the age of 65 will grow five times faster than the working-age population (Baxter and others, 2017). How global economies respond to the influence of changing population growth and demographics will depend on public policy, such as introducing policies that reduce barriers to the employment of women, and their ability to use advances in technologies to maintain productivity. Those changes in population growth and the distribution and densities of the population, as well as changing economies, will influence the marine environment in ways yet to be determined.", "The major growth in aquatic production is expected to come from aquaculture and is projected to reach 109 million tons in 2030, an increase of 37 per cent over 2016 levels. However, it is estimated that the annual growth rate of aquaculture will slow from 5.7 per cent in the period from 2003 to 2016 to 2.1 per cent in the period from 2017 to 2030, mainly because of a reduced rate of growth in Chinese production, offset in part by an increase in production in other countries (FAO, 2018a). The share of farmed aquatic animal species in global fishery production (for food and non-food uses), which was 47 per cent in 2016, is projected to exceed that of wild species in 2020 and to grow to 54 per cent by 2030. Over 87 per cent of the increase in aquaculture production in 2030 will come from Asian countries. Asia will continue to dominate world aquaculture production, contributing 89 per cent of total production in 2030. China will remain the world’s leading producer, but its share of total production will decrease from 62 per cent in 2016 to 59 per cent in 2030. Production is projected to continue to expand on all continents, with variations in the range of species and products across countries and regions (World Bank, 2013). Millions of people engaged in fisheries and aquaculture are struggling to maintain reasonable livelihoods. These are the people who are most vulnerable to certain climate change impacts, such as extreme weather conditions, storms, floods and rising sea levels, and particular attention needs to be paid to them when designing adaptation measures if the sector is to continue to contribute to meeting the global goals of poverty reduction and food security (FAO, 2018a).", "Changes in drivers Human civilizations originated and thrived in the floodplains and the deltaic coastal zones of the world’s large rivers, which are now inhabited by about 2.7 billion people (Best, 2019). The rapid increase in the demand for water, food, land and power has led to human interventions, such as the construction of large dams, deforestation, intensive agriculture expansion, urbanization, infrastructural construction and sand mining. Such human activities have placed those systems under immense stress, leading to large-scale and irreversible changes. According to the International Commission on Large Dams (2018), globally, there are 59,071 dams with heights of more than 15 m and related reservoirs of more than 3 million m3. The largest densities of hydropower dams are found in South America, South Asia and Northern Europe. The largest dams, including those have been built, are under construction or are planned, are located in the Mekong River basin, the Amazon River basin and the Congo River basin (Kondolf and others, 2014; Warner and others, 2019). The construction of dams and reservoirs can reduce the sediment supply to the coast by different degrees (Slagel and Griggs, 2008), sometimes by more than 50 per cent (Besset and others, 2019), leading to the erosion of deltas and adjacent coasts. The reduction in sediment supply to the coasts is expected to increase greatly in the twenty-first century (Dunn and others, 2018), by 50 to 100 per cent (Kondolf and others, 2014; Besset and others, 2019). For example, in the Pearl River, China, the construction of two mega dams (Yangtan and Longtan) has reduced the fluvial sediment supply to the coast by 70 per cent over the period 1992–2013 (Ranasinghe and others, 2019). Kondolf and others (2014) found that 140 dams had been built, were under construction or were planned for the Mekong River or its tributaries. Under a “definite future”, if 38 dams that are planned or are under construction are actually completed, the cumulative sediment reduction to the Mekong Delta would be 51 per cent; and if all dams that are planned and under construction are completed, there would be a cumulative sediment reduction to the Mekong Delta of 96 per cent. That would lead to a serious decay of mangrove systems and, as a consequence, the erosion of the coast and irreversible changes in the surrounding ecosystem. On the other hand, there are substantial efforts in States to remove large dams, such as the Elwha Dam in Washington State, United States (Warrick and others, 2015). Sand mined from rivers, beaches and coastal seabeds is used for land reclamation, beach nourishment and industry (Bendixen and others, 2019). That removes significant amounts of sand that would otherwise contribute to littoral transport, consequently resulting in a coastal sediment deficit (Montoi and others, 2017) and affecting the coastal morphology (International Council for the Exploration of the Sea, 2016; Abam and Oba, 2018). Presently, coastal beach and seabed sand mining is common practice in many countries, although it is sometimes illegal. Sand mining, in general, is known to take place in 73 countries on five continents, although there is no reliable figure on the practice worldwide (Peduzzi, 2014; Jayappa and Deepika, 2018).", "Economic activity in the ocean is expanding rapidly, with projections that, by 2030, under a business-as-usual scenario, the ocean economy could more than double to a value of more than $3 trillion, with approximately 40 million full-time jobs (Organization for Economic Cooperation and Development, 2016). Technological advances and innovations will be critical to identifying sustainable pathways that allow for the development of global economies, including the ocean economy, while addressing many of the challenges facing the ocean at present. In the context of such rapid change, regulation and governance will struggle to keep up. The integration of emerging ocean industries into existing, fragmented regulatory frameworks will restrict the ability to address pressures generated by industries in an effective and timely way. More effective integrated ocean management will be required to ensure a sustainable future for the ocean in the light of the drivers of change detailed in the present chapter and also in chapter 27. If greenhouse gas emissions continue to be released at the current rate, it is estimated that the surface temperature will warm by 1.5°C sometime between 2030 and 2052 (IPCC, 2018). Many changes to marine ecosystems as a result of climate change have already been observed, and future climate-related change and associated risks will depend on whether (and when) net zero greenhouse gas emissions are achieved and the associated rate, peak and duration of surface warming (IPCC, 2018). Even if net zero global anthropogenic CO2 emissions are achieved, sustained warming will persist for centuries to millenniums and will continue to cause further long-term changes in the climate system and, by association, in the ocean, including sea level rise and ocean acidification (IPCC, 2018). The upscaling and acceleration of mitigating and adaptive approaches will be required to reduce future climate-related risks to food security, maritime industries and coastal communities associated with changes to the marine environment. The COVID-19 pandemic is currently sweeping across the world, causing major disruption to national economies and people. In many regions, because of mitigating efforts to reduce the spread of the virus, pressures immediately affecting the ocean, such as fishing, tourism activities, pollution and greenhouse gas emissions, have been temporarily reduced. With restrictions being placed on the movement of people and on business operations, along with the closing of borders, disruption to supply chains and declining markets have affected a number of marine industries, notably fisheries. The likely impacts that reduced pressures might have on longer-term change by drivers such as climate change, however, are expected to be minimal, and it is currently unclear what benefits might be afforded to marine ecosystems. Disruptions to global supply chains have highlighted the need in many countries to strengthen local supply chains and, in particular, to explore e-commerce options for supporting supply chains in general.", "Consider how dependent upon the ocean we are. The ocean is vast – it covers seven-tenths of the planet. On average, it is about 4,000 metres deep. It contains 1.3 billion cubic kilometres of water (97 per cent of all water on Earth). But there are now about seven billion people on Earth. So we each have just one-fifth of a cubic kilometre of ocean to provide us with all the services that we get from the ocean. That small, one-fifth of a cubic kilometre share produces half of the oxygen each of us breathes, all of the sea fish and other seafood that each of us eats. It is the ultimate source of all the freshwater that each of us will drink in our lifetimes. The ocean is a highway for ships that carry across the globe the exports and imports that we produce and consume. It contains the oil and gas deposits and minerals on and beneath the seafloor that we increasingly need to use. The submarine cables across the ocean floor carry 90 per cent of the electronic traffic on which our communications rely. Our energy supply will increasingly rely on wind, wave and tide power from the ocean. Large numbers of us take our holidays by the sea. That onefifth of a cubic kilometre will also suffer from the share of the sewage, garbage, spilled oil and industrial waste which we produce and which is put into the ocean every day. Demands on the ocean continue to rise: by the year 2050 it is estimated that there will be 10 billion people on Earth. So our share (or our children’s share) of the ocean will have shrunk to one-eighth of a cubic kilometre. That reduced share will still have to provide each of us with sufficient amounts of oxygen, food and water, while still receiving the pollution and waste for which we are all responsible. The ocean is also home to a rich diversity of plants and animals of all sizes – from the largest animals on the planet (the blue whales) to plankton that can only be seen with powerful microscopes. We use some of these directly, and many more contribute indirectly to our benefits from the ocean. Even those which have no connection whatever with us humans are part of the biodiversity whose value we have belatedly recognized. However, the relationships are reciprocal. We intentionally exploit many components of this biodiverse richness. Carelessly (for example, through inputs of waste) or unknowingly (for example, through ocean acidification from increased emissions of carbon dioxide), we are altering the circumstances in which these plants and animals live. All this is affecting their ability to thrive and, sometimes, even to survive. These impacts of humanity on the oceans are part of our legacy and our future. They will shape the future of the ocean and its biodiversity as an integral physical-biological system, and the ability of the ocean to provide the services which we use now and will increasingly need to use in the future. The ocean is vital to each of us and to human well-being overall.", "Distribution of ocean benefits and disbenefits Developments in fish and seafood consumption The Food and Agriculture Organization of the United Nations (FAO) estimates that total fish consumption, including all aquaculture and inland and marine capture fisheries, has been rising from 9.9 kg per capita in the 1960s to 19.2 kg per capita in 2012 — an average increase of 3.2 per cent a year over half a century. The distribution of consumption per capita varies considerably, from Africa and Latin America and the Caribbean (9.7 kg) to Asia (21.6 kg), North America (21.8), Europe (22.0 kg) and Oceania (25.4 kg). Marine capture fisheries represent 51 per cent and marine aquaculture 13 per cent of the total production of fish (154 million tons), of which 85 per cent is used for food. The annual consumption of fishery products per capita has grown steadily in developing regions (from 5.2 kg in 1961 to 17.0 kg in 2009) and low-income food-deficit countries (from 4.9 kg in 1961 to 10.1 kg in 2009). This is still considerably lower than in more developed regions, even though the gap is narrowing. A sizeable share of fish consumed in developed countries consists of imports and, owing to steady demand and declining domestic fishery production (down 22 per cent in the period 1992-2012), their dependence on imports, in particular from developing countries, is projected to grow. FAO estimates indicate that small-scale fisheries contribute about half of global fish catches. When considering catches destined for direct human consumption, the share contributed by the subsector increases, as small-scale fisheries generally make broader direct and indirect contributions to food security (through affordable fish) and employment for populations in developing countries. As well as direct consumption, many small-scale fishermen sell or barter their catch. It is doubtful that much of that trade is covered by official statistics. However, studies have shown that selling or trading even a portion of their catch represents as much as one third of the total income of subsistence fishermen in some low-income countries. Thus an increase in imports of fish by more developed countries from less developed countries has the potential to increase inequities in food security and nutrition, unless those considerations are taken into account in global trade arrangements.", "The global impact of poor water quality was examined in a study by the Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) and WHO. Based on global estimates of the number of tourists who go swimming, and WHO estimates of the relative risks at various levels of contamination, the study estimated that bathing in polluted seas causes some 250 million cases of gastroenteritis and upper respiratory disease every year and that some of those people affected would be disabled over the longer term. Measured by adding up the total years of healthy life that are lost through disease, disability and death, the worldwide burden of disease incurred by bathing in contaminated seawater is some 400,000 disability-adjusted life-years (a standard measure of time lost owing to premature death and time spent disabled by disease), comparable to the global impacts of diphtheria and leprosy. GESAMP and WHO estimated that the cost to society, worldwide, amounted to about $1.6 billion per year (GESAMP, 2001). Furthermore, harmful or toxic algal blooms can induce serious neurological disease and also have major financial impacts (Bechard, 2020; Diaz and others, 2019). The most common pollutants tend to come from one of two places: humans or animals. Human faecal matter in water bodies constitutes the greatest public health threat because humans are reservoirs for many bacteria, parasites and viruses that are dangerous to other humans and can lead to a variety of illnesses. The cause of many problems can often be traced back to sewage overflows or leaky residential septic systems. Run-off from agricultural land can also represent a serious health concern, as faecal waste from farmed animals can contain pathogens, including various viruses, cryptosporidium, Escherichia coli and salmonella, while pet waste on beaches can also pose health threats to humans (Food and Agriculture Organization of the United Nations (FAO), 2017; Moore and others, 2014; Woods Hole Oceanographic Institution (WHOI), 2020). Exposure to contaminated seawater thus affects the health of those enjoying recreation by the sea and adversely affects coastal tourism and recreation. Drawing together the scientific work in the field, in 2003, WHO published Guidelines for Safe Recreational Water Environments: Coastal and Fresh Waters (WHO, 2003). More recently, WHO, with the support of the European Union, prepared recommendations on scientific, analytical and epidemiological developments relevant to the parameters for bathing-water quality, with special reference to Europe (WHO, 2018). WHO has indicated that the recommendations will inform the revision of the 2003 Guidelines (WHO, 2020). However, achievement of such standards requires adequate planning and infrastructure. Even where, as in some parts of India, strenuous efforts are being made to install properly operating sewage treatment systems, problems persist. For example, in Goa, a major tourist location, faecal coliform bacteria exceeded the relevant standards at all 10 of the beaches monitored (Goa State Pollution Control Board (GSPCB), 2019). The monitoring of bathing water will not achieve its aim of improving public health without improvements in the communication to the public of the findings so that they are readily understandable. The current European Union legislation on bathing water (European Union, 2006) provides for standardized ways of publicizing the results of the monitoring that is required. Similar systems are found in various Australian States (New South Wales Department of Planning, Industry and Environment (NSW-DPIE), 2020; South Australia Environment Protection Agency (SA-EPA), 2020) and in the United States (WHOI, 2020). Climate change may be influencing the prevalence of microbial infections (Deeb and others, 2018; Konrad and others, 2017). For example, increases in Vibrio vulnificus and Vibrio parahaemolyticus infections, both topical, and infections from ingesting seafood (oysters), have been described in relation to climate change, with rises in cases overall, as well as new cases found in high latitude areas that were previously not affected, as they are having more days over the minimum temperature threshold (Vezzulli and others, 2016).", "The importance of fishes and fishery-based activities to food security in less developed countries is particularly prominent. In 2016, Asia accounted for 85.7 per cent of the global population engaged in fisheries and aquaculture (FAO, 2018a), which represents an increase of more than 1 per cent since 2014. More than 19 million people (32 per cent of all people employed in the sector) were engaged in fish farming, and 95.9 per cent of all aquaculture activities were being conducted in Asia. The statistics clearly indicate the important and increasing contribution of aquaculture to that continent’s regional food and nutrition security, as well as its socioeconomic development. There are several major reviews on the subject (Allison, 2011; Béné and others, 2016). Fishes provide more than 4.5 billion people with at least 15 per cent of their animal protein intake. The nutritional properties of fishes make them important to the health of consumers in developed and developing countries. Fishes are efficient converters of feed into high quality food and their carbon footprint is lower than that of other animal production systems. Fisheries and aquaculture value chains contribute substantially to the income and employment, and therefore indirectly to the food security, of more than 10 per cent of the world’s population, principally in developing countries and emerging economies (FAO, 2017a). The 80 million tons of aquatic animals produced in 2016 contributed 46 per cent to total aquatic animal production and a little over 54 per cent to total fish consumption in the same year. Per capita food fish consumption was estimated at 20.3 kg in 2016, compared with 19.5 kg in 2013 (FAO, 2018b). An estimated 18.7 million people were employed in aquaculture in 2015 (FAO, 2017a). The culture and use of small indigenous fish species with high nutritional value in human nutrition is recognized and is being practised (Castine and others, 2017). However, with the intensification of aquaculture production methods, and with the increasing use of plant-based feedstuffs, care must be taken to ensure that the nutrient contents of farmed aquatic animal products are as high as possible (Beveridge and others, 2013; Bogard and others, 2017).", "Economic activity Economic growth, measured as gross domestic product (GDP) per capita, has steadily increased globally, although it has slowed as a result of declining trade volume. Growth in the first half of 2019 stood at 1 per cent, the weakest level since 2012 (IMF, 2019). Economic growth, when averaged across the global population (with vast geographical variability in economic growth, as noted in sect. 3), has resulted in the average annual income of an individual increasing from $3,300 in 1950 to $14,574 in 2016. The slowdown in growth is largely associated with weak manufacturing and trade. In contrast, service industries such as tourism have grown (IMF, 2019). As the global population has grown and the demand for goods and services has increased, there has been an associated increase in energy consumption and resource use. Understanding the relationship between increasing economic activity and the use of natural resources is essential to identifying future sustainability and limiting impacts associated with extraction, production, consumption and waste generation (Jackson, 2017). Total energy demand, as measured in million tons of oil equivalent (Mtoe), grew from 13,267 Mtoe in 2014 to 13,978 Mtoe in 2018. At the same time, primary energy intensity, an indicator of how much energy is used by the global economy, slowed from 1.7 per cent in 2017 to 1.2 per cent in 2019 (IEA, 2019a). The slowing of efficiencies (i.e., the amount of GDP generated for the amount of energy used) is the result of a number of short-term factors, such as growth in fossil fuel-based electricity generation, and longer-term structural changes, such as a slowing transition towards less energy-intensive industries. At the same time, investment targeting energy efficiencies has been stable since 2014. Improvements in technical efficiency reduced energy-related carbon emissions by 3.5 gigatons of CO2 between 2015 and 2018 (IEA, 2019a). In addition, renewable energy production has grown as many countries shift to energy strategies that rely on it as part of efforts to reduce greenhouse gas emissions. Ocean energy production is part of many strategic developments and grew from 1 TWh (Terawatt hour) in 2014 to 1.2 TWh in 2018 (IEA, 2019b). Changes in energy production, including marine renewable energy and the pressures generated on the marine environment, are detailed in chapters 19 and 21. Economic activity associated with the extraction of marine resources also continues to grow as the global population expands. Marine and freshwater food production was a key protein provider and source of income for approximately 59.6 million people globally in 2016, an increase from 56.6 million in 2014. Although marine capture fisheries remain stable at around 80 million tons, mariculture is steadily increasing, from 26.8 million tons in 2014 to 28.7 million tons in 2016 (Food and Agriculture Organization of the United Nations, 2018). The implications for increasing marine food production demands, including overfishing, bycatch of endangered species and habitat loss or degradation by fishing and aquaculture, are described in detail in chapters 15–17. Many countries are developing or have developed strategies for the potential growth of maritime activities, such as ocean energy, aquaculture, marine biotechnology, coastal tourism and seabed mining (i.e., growth of the blue economy). However, an important constraint on the growth of ocean economies is the current declining health of the ocean and the pressures already being placed on it (Organization for Economic Cooperation and Development, 2016), many of which are detailed in Part 5." ]

[ "The marine environment is currently subject to a number of pressures, many of which are derived from human activities. They include climate change, the extraction of resources, pollution (from land and marine sources) and invasive species, resulting in biodiversity loss, habitat damage and fragmentation and disease (e.g., Evans and others, 2017). The aim of ecosystem-based management is to balance human activities with environmental stewardship in order to maintain ecosystem properties, functions and services. That requires an appreciation of how and to what extent human activities and natural events interact and affect ecosystem components and their functioning. It also requires the identification of solutions to prevent and mitigate the pressures being caused by such interactions (Halpern and others, 2008; Levin and others, 2009; Ban and others, 2010; Curtin and Prellezo, 2010). Those interactions are known as cumulative impacts or cumulative effects. The terms “cumulative impacts” and “cumulative effects” are often used interchangeably to describe how pressures affect ecosystems. The use of standardized language is key to the transfer of knowledge, assessment approaches and expertise across management boundaries and among stakeholders and organizations. A preference for the use of the term “cumulative effects” has been identified, noting that impacts are hypothesized and have been either not directly observed or attributed (Murray and others, 2015). For consistency, the term “cumulative effects” is used in the present chapter. There is as yet no universally accepted definition of cumulative effects and impacts, with definitions varying in the literature, depending on what is being assessed, and the context within which the assessment is being undertaken (e.g., Anthony, 2016; Spaling and Smit, 1993; Hegmann and others, 1999; Halpern and others, 2008; Johnson, 2016; Uthicke and others, 2016). The present chapter follows the premise that effects can be defined as a change to the environment, including its human components, while impacts represent the consequences of such change (Johnson, 2016). There are four general types of cumulative effects: additive, synergistic, antagonistic (compensatory) and masking (Sonntag and others, 1987; Hegmann and others, 1999; Crain and others, 2008; Halpern and others, 2008). Additive effects are incremental additions to the pressures caused by an activity, with each increment adding to previous increments over time. Synergistic effects, also referred to as amplifying or exponential effects, magnify the consequences of individual pressures to produce a joint consequence that is greater than the additive effect. Antagonistic or compensatory effects produce a joint consequence that is less than additive. Masking effects produce essentially the same consequence for the ecosystem or social component as would occur with exposure to one of the pressures alone. Impacts that can be considered cumulative may result from a single activity that repeatedly produces a single pressure, a single activity that produces multiple pressures, multiple activities that produce a single pressure or multiple activities that produce multiple pressures over time (Foley and others, 2017)." ]

[ "B2092" ]

[ "The \"pseudo-sticking and pull\", also nicknamed \"blocky effect\" (because of its general aspect), is a common acquisition artifact that reduces considerably the quality of wireline acoustic and microresistive image logs, even though it is not well known among image log interpreters, well-site geologists and engineers. This artifact is generated by heave motion influence when the wave movement is not minimized enough by the compensation systems during offshore wireline operations. In fact, it is well known that the linear or rotary compensator systems reduce the heave variance between 52-80% and, sometimes, other factors such as string weight and fluid density can affect, significantly, wireline logs quality by the heave variance not well compensated. In this case, mainly the wireline stationary tools and the ones that need lower acquisition speed, present depth uncertainties that may cause relevant problems. The image logs are largely used in pre-salt reservoirs for geomechanics, petrophysics, structural, sedimentological and stratigraphic studies due to their great contrast responses on carbonates. However, because acoustic image logs run at speeds around 425 ft/h (against 3600 ft/h from basic logs) and acquire between 180 and 250 samples data each 0,2 inches depth, this log becomes more affected by this artifact than the microresistive one (over 1500 ft/h). The residual heave affects directly the image quality by creating \"pseudo-sticking and pull\" at each wave period, distorting the image log significantly. Besides the artifact that immediately appears on the image during the logging, the residual heave can also be confirmed by observing when cable tension and vector Z accelerometer variation have the same frequency as the period of ocean waves, monitored by the meteo-oceanographic daily reports. Even though this artifact can be minimized with processing (better than true sticking and pull corrections), the loss of quality should be considered. Petrobras experience has also shown that interventions directly on the source by adjusting compensators and changing steering towards can be effective to handle this problem. In order to help the interested community in acquiring better data with minimum costs, this work shows some examples of this artifact on acoustic image logs from pre-salt wells. It can also show the results with processing, the differences reached after adjusting compensators and demands for future works.", "This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment.", "The mixture of different water masses can strongly influence the marine reservoir effect (MRE) in localities under the effect of coastal marine upwelling. The Cabo Frio region, on the southeastern Brazilian coast, is well known for its seasonal marine upwelling and for its rich landscape of Holocene shellmounds. In this kind of archaeological settlement, common on the southern and southeastern Brazilian coasts, marine mollusk shells are frequently used for radiocarbon dating and can represent a valuable tool in the study of MRE. On the other hand, terrestrial mollusks have proven to be an important alternative to represent the atmospheric carbon isotopic concentration. In this work we analysed the most frequent terrestrial and marine mollusk shells from the Usiminas shellmound, on Cabo Frio Island. The radiocarbon signal of marine shells from Pinctada imbricata (Röding, 1798), Ostreidae (Rafinesque, 1815), Cymathium parthenopeum (Von Salis, 1793), Leucozonia nassa (Gmelin, 1791), Lithopoma olfersii (Philippi, 1846), and that of terrestrial shells from Thaumastus achilles (Pfeiffer, 1852) and Megalobulimus terrestris (Spix, 1827), collected from the archaeological layers in the sequence, were measured and a value of 67 ± 33 14C yr was obtained for the local offset from the average global marine reservoir age. The effect of upwelling in this region and in its surrounding area is discussed.", "Integrated management of human activities affecting the ocean When various conclusions in parts III to VI of the present Assessment are linked together, they clearly show that a similar broadening of the context of management decisions will produce similar benefits in and among other sectors of human activities that affect the ocean. Examples of such interactions of pressures on the environment include: The lack of adequate sewage treatment in many large coastal conurbations, especially in developing countries, and other excessive inputs of nutrients (especially nitrogen) are producing direct adverse impacts on human health through microbial diseases as well as eutrophication problems. In many cases, they are creating harmful algal blooms, which are not only disrupting ecosystems, but also, as a consequence, damaging fisheries, especially small-scale fisheries and the related livelihoods and, in some cases, poisoning humans through algal toxins; Plastic marine debris results from the poor management of waste streams on land and at sea. There is a clear impact of such debris in its original form on megafauna (fish caught in “ghost” nets, seabirds with plastic bags around their necks, etc.) and on the aesthetic appearance of coasts (with potential impacts on tourism). Less obviously, impacts on zooplankton and filter-feeding species have also been demonstrated from the nanoparticles into which those plastics break down, with potentially serious effects all the way up the food web. Likewise, nanoparticles from titanium dioxide (the base of white pigments found in many waste streams) have been shown to react with the ultraviolet component of sunlight and to kill phytoplankton; Although much is being done to reduce pollution from ships, there is scope for more attention to the routes that ships choose and the effects of those routes in terms of noise, chronic oil pollution and operational discharges; The cumulative effects of excessive nutrient inputs from sewage and agriculture and the removal of herbivorous fish by overfishing can lead to excessive algal growth on coral reefs. Where coral reefs are a tourist attraction, such damage can undermine the tourist business; The ocean is acidifying rapidly and at an unprecedented rate in the Earth’s history. The impact of ocean acidification on marine species and food webs will affect major economic interests and could increasingly put food security at risk, particularly in regions especially dependent on seafood protein.", "Cultural services and other social benefits of marine and coastal ecosystems Heritage is also part of the cultural services provided by the ocean, with significant, though often unquantified, social and economic benefits (Firth, 2015). The iconic nature of underwater cultural heritage, such as historic shipwrecks, captures archaeological and historical information, revealing unique aspects of past human seafaring and behaviour, to be shared through museums, documentaries and public research. Shipwrecks can also yield valuable information about the sociocultural, historical, economic and political contexts on various scales of reference (local, regional or global) between the date of the vessel’s construction (e.g., hull design, rig, materials used or purpose) and the reason for its eventual demise in the sea (e.g., warfare, piracy, privateering, intentional abandonment or natural weather events) (Gould, 1983). The remains of prehistoric and historic landscapes submerged by changing sea levels and the continuing destruction of important coastal sites by exposure and erosion are important reminders of climate change in the human past and of the impact of the climate crisis today (Harkin and others, 2020). Wreck site tourism plays a role in the recreational diving industry. Services to memorialize vessel losses, such as wreath-laying ceremonies at submerged warship gravesites, are an expression of the deep connection to sacrifice at sea. The diversity of cultural services arising from shipwrecks and other historic structures in the sea is complemented by the role that underwater cultural heritage can play as artificial reef, providing habitats that are important for nature conservation, sea angling and commercial fishing, for example (Firth, 2018). Finally, there is a sense of place engendered in onlookers by the ocean. The sense of openness and exposure to the elements can be very important to those who live by the sea or visit it as tourists. As discussed in chapter 8B on human health and the ocean, there is growing evidence that the sense of openness engendered by the ocean can improve human health. The ocean has also been an important source of inspiration to artists, composers and writers, often reflecting economically important aspects of society. Some studies reveal the deep emotional attachment of people to the marine environment (e.g., the Black Sea in Fletcher and others (2014) and the North Sea in Gee and Burkhard (2010)), as well as the importance of maintaining that relationship to preserve both nature and culture (Fletcher and others, 2014). However, despite progress to date, marine research and management have until recently largely neglected the critically important role of the sense of place, including how it influences the success and efficacy of management interventions (Van Putten and others, 2018; Hernandez and others, 2007). Opportunities for income generation and employment opportunities, for education and recreation and for scientific and artistic information and inspiration are also part of the wider range of social benefits that marine and coastal ecosystems provide and upon which the well-being of populations, regardless of their distance from the shore, hinges directly and indirectly.", "The ultimate effect that ocean acidification (OA) and warming will have on the physiology of calcifying algae is still largely uncertain. Responses depend on the complex interactions between seawater chemistry, global/local stressors and species-specific physiologies. There is a significant gap regarding the effect that metabolic interactions between coexisting species may have on local seawater chemistry and the concurrent effect of OA. Here, we manipulated CO2 and temperature to evaluate the physiological responses of two common photoautotrophs from shallow tropical marine coastal ecosystems in Brazil: the calcifying alga Halimeda cuneata, and the seagrass Halodule wrightii. We tested whether or not seagrass presence can influence the calcification rate of a widespread and abundant species of Halimeda under OA and warming. Our results demonstrate that under elevated CO2, the high photosynthetic rates of H. wrightii contribute to raise H. cuneata calcification more than two-fold and thus we suggest that H. cuneata populations coexisting with H. wrightii may have a higher resilience to OA conditions. This conclusion supports the more general hypothesis that, in coastal and shallow reef environments, the metabolic interactions between calcifying and non-calcifying organisms are instrumental in providing refuge against OA effects and increasing the resilience of the more OA-susceptible species.", "The new map shows the way in which the ocean consists of four main basins (the Arctic Ocean, the Atlantic Ocean, the Indian Ocean and the Pacific Ocean) between the tectonic plates that form the continents. The tectonic plates have differing forms at their edges, giving broad or narrow continental shelves and varying profiles of the continental rises and continental slopes leading from the abyssal plain to the continental shelf. Geomorphic activity in the abyssal plains between the continents gives rise to abyssal ridges, volcanic islands, seamounts, guyots (plateau-like seamounts), rift valley segments and trenches. Erosion and sedimentation (either submarine or riverine when the sea level was lower during the ice ages) has created submarine canyons, glacial troughs, sills, fans and escarpments. Around the ocean basins there are marginal seas, partially separated by islands, archipelagos or peninsulas, or bounded by submarine ridges. These marginal seas have sometimes been formed in many ways: for example, some result from the interaction between tectonic plates (for example the Mediterranean), others from the sinking of former dry land as a result of isostatic changes from the removal of the weight of the ice cover in the ice ages (for example, the North Sea). The water of the ocean circulates within these geological structures. This water is not uniform: there are very important physical and chemical variations within the sea water. Salinity varies according to the relativity between inputs of freshwater and evaporation. Sea areas such as the Baltic Sea and the Black Sea, with large amounts of freshwater coming from rivers and relatively low evaporation have low salinity – 8 parts per thousand and 16 parts per thousand, respectively, as compared with the global average of 35 parts per thousand (HELCOM 2010, Black Sea Commission 2008). The Red Sea, in contrast, with low riverine input and high insolation, and therefore high evaporation, has a mean surface salinity as high as 42.5 parts per thousand (Heilman et al 2009). Seawater can also be stratified into separate layers, with different salinities and different temperatures. Such stratification can lead to variations in both the oxygen content and nutrient content, with critical consequences in both cases for the biota dependent on them. A further variation is in the penetration of light. Sunlight is essential for photosynthesis of inorganic carbon (mainly CO2) into the organic carbon of plants and mixotrophic species1 . Even clear water reduces the level of light that can penetrate by about 90 per cent for every 75 metres of depth. Below 200 metres depth, there is not enough light for photosynthesis (Widder 2014). The upper 200 metres of the ocean are therefore where most photosynthesis takes place (the euphotic zone). Variations in light level in the water column and on the sea bed are caused by seasonal fluctuation in sunlight, cloud cover, tidal variations in water depth and (most significantly, where it occurs) turbidity in the water, caused, for example, by resuspension of sediment by tides or storms or by coastal erosion. Where turbidity occurs, it can reduce the penetration of light by up to 95 per cent, and thus reduce the level of photosynthesis which can take place (Anthony 2004).", "In carbonate rock reservoirs, spatial distribution models and elastic properties are complex because of diagenetic processes and mineralogical composition, which together directly interfere with variations in pore shape and interconnectivity. The main objective of this paper is to propose a workflow to aid in three-dimensional quantitative carbonate reservoir characterization of the Quissamã Formation (Macaé Group) in the Pampo field of the Campos Basin, offshore Brazil. Model-based seismic inversion, sequential Gaussian simulation with cokriging for porosity modeling, and truncated Gaussian simulation with trend for facies modeling were used to characterize the carbonate reservoirs. Our results show that the carbonate platform is located between the upper Aptian and lower Albian seismic surfaces. Interpretation of a new surface, called the intra-Albian, was possible via acoustic-impedance (AI) analysis. Our workflow facilitated identification of low AI, high porosity, and best facies areas in structural highs where the most productive wells have been drilled. Facies modeling suggests that intercalation of facies with high and low porosities is connected to shallowing-upward cycles. Finally, several debris facies with low AI and high porosities were identified in an area that could be targeted for new exploration.", "Wind-driven mixing affects only the surface of the ocean, mainly the upper 200 metres or so, and rarely deeper than about 1,000 metres. Without the ocean’s thermohaline circulation system, the bottom waters of the ocean would soon be depleted of oxygen, and aerobic life there would cease to exist. Superimposed on all these processes, there is the twice-daily ebb and flow of the tide. This is, of course, most significant in coastal seas. The tidal range varies according to local geography: the largest mean tidal ranges (around 11.7 metres) are found in the Bay of Fundy, on the Atlantic coast of Canada, but ranges only slightly less are also found in the Bristol Channel in the United Kingdom, on the northern coast of France, and on the coasts of Alaska, Argentina and Chile (NOAA 2014). Global warming is likely to affect many aspects of ocean processes. Changes in seasurface temperature, sea level and other primary impacts will lead, among other things, to increases in the frequency of major tropical storms (cyclones, hurricanes and typhoons) bigger ocean swell waves and reduced polar ice formation. Each of these consequences has its own consequences, and so on (Harley et al., 2006; Occhipinti-Ambrogi, 2007). For example, reduced sea ice production in the polar seas will mean less bottom water is produced (Broecker, 1997) and hence less oxygen delivered to the deep ocean (Shaffer et al., 2009).", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost." ]

[ "The Santos Basin Pre-salt reservoirs are located in deepwater offshore Brazil and although the oil has a good quality, their CO2 concentrations are higher than those generally found in other Brazilian fields. PETROBRAS and its partners established that they will not vent the CO 2 produced in the Pre-salt layer to the atmosphere so a CO 2 injection scenario is a potential alternative to improve the oil recovery. An extensive monitoring program is being considered in order to ensure the Carbon Capture and Geological Storage (CCGS) projects efficiency. However, there are several challenges to be confronted concerning the CO2 monitoring in such adverse conditions as the Presalt reservoirs. Among the existing techniques for monitoring offshore storage sites, some of them have already technological maturity and applicability to the Pre-salt environment but other methods must rely on some development or methodology adaptation to the specific features of these fields and they will be initiatives of the PRO-CO2 technological program of PETROBRAS Research Center. This paper addresses the main technological challenges for PETROBRAS and its partners related to the methods applicability for the CO2 storage monitoring in the Santos Basin Pre-salt Cluster and also exposes the strategies found to solve the problems." ]

[ "A437" ]

[ "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "Located in the Brazilian continental shelf, the so called \"Pre-Salt\" reservoirs with large accumulations of excellent quality, high commercial value light oil have become the most strategic oil production site for Brazil. One of the main challenges that has recently arisen concerns the definition of an adequate process to address the high concentration of carbon dioxide (CO2) presented in their geological formations. For the Pre-Salt basin, several options of offshore carbon dioxide storage have been studied, such as: aquifers, depleted reservoirs, and salt caverns. Although a mined offshore salt cavern has never been constructed, its adoption has been gaining momentum due to the mantle origin of CO2, the thickness of rock layer above the salt layer, and the lack of reservoirs below the carbonate reservoirs capable to store gases. Because of its unprecedent characteristics, the development of such facility implies a series of challenges in terms of safety and integrity aspects. Using tailored qualitative risk management tools, this paper explores the many aspects and interdependencies of well design, well clustering configuration, drilling, solution mining, CO2 disposal, and abandonment phases related to offshore salt caverns. The results obtained so far indicated that, technically, they are a feasible solution for Pre-Salt CO2 storage. However, economic and environmental viability strongly depends on well clustering configuration and solution mining process.", "The Santos Basin Pre-Salt Cluster (SBPSC), Offshore Southeast Brazil, is a unique scenario, posing great development challenges. The microbial carbonate reservoir is unusual regarding its origin and petrophysical properties; the fluids have a variable CO2 content; the few analogue reservoirs around the world do not compare in terms of volumes, water depth and distance to the coast; and there are also flow assurance issues. Considering the importance of these reserves for the Brazilian economy and the opportunity to accelerate cash flow, Petrobras and its partners have opted for a fast track development, including extended well tests (EWTs) and production pilots. The current Petrobras Business Plan (2011-15) foresees mat the SBPSC areas alone will produce over 500,000 boe/d in 2015 and over 1,100,000 boe/d in 2020. These numbers refer only to Petrobras share and do not include me transfer of rights with economic compensation from the Brazilian government to Petrobras. Therefore, the initial development phase will have to cope with several uncertainties, mainly the subsurface ones. Some of the most relevant are the quality and the heterogeneity degree of each reservoir zone; the compositional grading of the fluids; the performance of different EOR methods; and the presence of fractures affecting the flow. How to specify and anticipate the acquisition of expensive equipment, such as FPSOs and subsea devices, with uncertainties to be clarified? When is it worth to invest in more data acquisition, such as EWTs, core and fluid sampling, extensive lab analysis or even more appraisal wells? The timing and the uncertainty reduction foreseen for each initiative must be taken into account. On the other hand, when is it better to pay for extra flexibilities, accepting the inevitable CAPEX increase? Some examples would be: smart completions and possibility to inject different chemical products in the wells; gas and water separated lines for each satellite injector; flexible subsea layout, allowing multiples strategies and the addition of more wells; FPSO plants designed to inject desulphated water, or to export, import or reinject me gas, and also to separate variable CO2 contents in the produced fluids. This paper aims to discuss the influence of the main subsurface uncertainties in the selection of alternatives to develop the giant fields in the SBPSC, in a fast track way.", "The \"Pre-salt application\" offers some unique and challenging difficulties for producers and the service companies who support their operations. The carbonate reservoirs which occur in Brazilian deepwater fields provide unique challenges that relate to high temperatures, the high H2S content, as well as severe saline and scaling conditions. It is quite common to find oil and gas fields with estimated H2S level in the produced gas between 100 and 200 ppmv and salinity approximately 230,000 mg/L. Hydrogen sulfide is a poisonous gas, very harmful to life, and removal is essential to comply with sulfur emissions, as well as to ensure system and pipeline integrity.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "Brazilian carbonate reservoirs contain huge oil-in-place volumes and are likely to have an important economic impact in global oil industry. Such carbonate reservoirs, both Albian and Aptian, are located offshore in deep water, which has an important role in development costs. In siliciclastic plays it is standard practice to use time-lapse (4D) seismic to locate wells in unswept areas, maximizing the recovery factor. However, in carbonate plays, time-lapse seismic monitoring remains challenging, with few cases of success published around the world. Carbonates differ from siliciclastic rocks in many aspects. With a varied chemical composition and complex pore connectivity, carbonates bring on a large diversity of facies, each one showing a specific seismic response. Moreover, the usually high incompressibility of the carbonate matrix reduces sensitivity to pressure and saturation changes, which are the main effects expected on a hydrocarbon field undergoing production. Considering both the economic relevance and the difficulties of using time-lapse seismic to monitor carbonate reservoirs, Petrobras created a strategic program to face this challenge, a time-lapse seismic (S4D) study of an Albian carbonate reservoir located in the Campos Basin offshore Brazil. Three legacy data were available: streamer-1987, streamer-2002, and ocean-bottom cable-2010. Extensive feasibility studies are performed as well as a meticulous prestack 4D simultaneous inversion based on the seismic data, preliminary cross-equalized to partially overcome the initial low repeatability. A multidisciplinary interpretation conducted by a team of geophysicists, geologists, and reservoir engineers finally lead to results overcoming expectations. Saturation and pressure changes are detected using P-and S-impedance attributes, consistent with production data. Results are opening perspectives for further monitoring other carbonate reservoirs, especially with new presalt Brazilian discoveries in the Campos and Santos Basins, which might have a huge economic impact.", "The high CO2 content found in Pre-Salt offshore oil fields has led to cost-energetically processes for CO2 removal and destination. In this paper, an innovative and promising alternative subsea separation process (SSP), proposed by Petrobras, was analyzed. Since a CO2 rich phase is expected at reservoir conditions, subsea gravity separators can be employed avoiding large volumes of CO2 from being sent to the topside, lowering gas processing plant complexity. A differential-algebraic system of equations (DAE) was developed for the SSP modeling. Design and steady-state simulations were carried out within EMSO simulator. To ensure the process variables remain at their desirable values two control strategies, PID and Linear Model Predictive Control (MPC), were compared. The proposed process showed technical feasibility with up to 62% GOR reduction. The control strategies presented reasonable performance. MPC had for most of the controlled variables a better performance.", "Significant volumes of heavy and high viscosity oil have been discovered in the Campos and Santos Basins, offshore Brazil, and its economical production is a challenge for the oil industry. New production technologies are required for the economic development of offshore heavy oil reservoirs. Long horizontal or multilateral wells, produced with high power ESPs, hydraulic pumps or submarine multiphase pumps, could partially compensate the decrease in productivity caused by the high oil viscosity. The flow assurance could be improved with insulated or heated flowlines or, alternatively, with the use of water as the continuous phase. The heavy oil processing in a Floating Production Unit is not straightforward, and new separation technologies, as well as the feasibility of the heavy oil transportation with emulsified water, should be investigated. The existence of light oil reserves in neighboring reservoirs, even in small volumes, would be an important issue for the commercial feasibility of the heavy oil area. The Petrobras experience with offshore heavy oil fields in the Campos Basin shows that some can be economically produced. However, the economic feasibility is controlled by factors such as: reservoir characteristics; water depth; possibility of blend with light oil; oil acidity and contaminants; price scenario; fiscal regime; availability of new production technologies; transportation, refining and marketability of the heavy oil. The recently created Petrobras Heavy Oil Technological Program - PROPES - is in charge of the development, together with universities, service companies and the industry, of new technologies for the offshore heavy oil fields. The main objective of all this work is to set the basis for the economical development of the significant volumes of heavy oil already discovered offshore Brazil. This paper presents the main research and development topics of the Petrobras Heavy Oil Program, as well as the key production technologies for the target fields. Additionally, the results of some well tests and Extended Well Tests (EWT) in heavy oil reservoirs in the Campos Basin are presented and discussed.", "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water." ]

[ "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns." ]

[ "A1857" ]

[ "The consortium operating Block BMS11 offshore Brazil has opened the 10 million cu m/day LulaMexilhao natural gas pipeline. The consortium is comprised of operator Petroleo Brasileiro SA 65%, BG Group 25%, and Petrogal Brasil SAGalp Energia 10%. The system connects the presalt Lula field to the Mexilhao platform in the Santos basin's shallow waters. The 18-in. OD LulaMexilhao pipeline, operating at 250 bar, extends 216 km, starting 2145 m below sea level at the Cidade de Angra dos Reis floating production, storage, and offloading vessel, and ending at the Mexilhao platform, at a depth of 172 m. Mexilhao is the largest fixed production unit in Brazil and the new pipeline as the deepest and longest undersea pipeline ever laid in Brazil. The new pipeline will also transport natural gas from other fields developed as part of Phase 1 of Santos basin presalt operations, with connections to the FPSO developing each, two in the Tupi field, one in Guara.", "The Petroleo Brasileiro SA (Petrobras), a state-owned oil company utilizes its floating production storage and offloading (FPSO) P-50 vessel to 16 production wells at the Albacora Leste field in Campos basin. FPSO symbolizes Brazil's plans to reach oil self-sufficiency by mid-2006. The FPSO will process oil pumped from the field 150 km off Rio de Janeiro and each peak production of 180,000 b/d by August, which represents around 10% of Brazil's crude oil output. The P-50 will also be able to handle 6M cu m/day of natural gas. The P-50 and P-34, also an FPSO, are to begin processing 20,000 b/d of oil at Jubarte field. They will raise national production to 1.9M b/d in 2006, surpassing domestic needs and making Brazil reach oil self-sufficiency.", "On November, 2010 Petrobras defined the necessity of one additional gas export pipeline in Santos Basin Pre-Salt area to improve the capacity of the export gas network and assure the objectives defined in the Strategic Plan. Nowadays there are two gas export pipelines in operation to export the gas from pre-salt area: Rota 1 connecting Lula Sul field to onshore facilities in Caraguatatuba/SP and Rota 2 connecting Lula Área de Iracema Sul to onshore facilities in Cabiunas/RJ. The new 20-in and 24-in gas export pipeline named Rota 3 is approximately 307km long and connects Lula Norte field in Santos Basin to Jaconé Beach/Maricâ It has 15 spare hubs and 3 PLEMs for future connections to Sépia, Berbigão, Atapu, Sururu, Buzios and Libra fields. Also, Rota 3 is interconnected to export gas pipeline Rota 2 in a loop to permit gas exportation through Maricá and Cabiúnas. This paper addresses the pipeline design optimizations based on standard DNV-0S-F101 and on several consulting to national and international pipe suppliers. Full scale qualifications tests were performed in accordance with DNV-0S-F101 to permit the use of the alfafab factor identical to one for the supplied 20-in UOE pipes. All qualification process was witnessed by DNV. Additional simplifications were introduced aiming to costs reduction and in order to improve attractiveness of EPCI (Engineering, Procurement, Construction and Installation) contract. Installation contractors were invited to suggest simplifications to the project. Lessons learned during the design, BID process and installation phase of the project are also envisaged.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008.", "In the presence of the President of the Republic, Luiz Inácio Lula da Silva, the BrasFels S/A shipyard launched to the sea the $(US)1 billion P-51, the first semi-submersible platform built entirely in Brazil. Ordered by Petrobras, the unit is programmed to operate in the Marlim Sul field, Campos basin, state of Rio de Janeiro with 75% of the goods and services applied to the construction provided by Brazilian companies. In 2010, the P-51 will reach its maximum operating capacity of 180,000 bpd of petroleum and 6 million cu m/day of gas. The P-51 will provide about 8% of the national petroleum production. The P-51 will be strategic with respect to increasing the supply of gas to Brazil under Plangás (Plano de Antecipação da Produçäo de Gás Natural). The P-51 is also part of the PDET (Plano Diretor de Escoamento e Tratamento) of the Cuenca basin. Of the 6 million cu m/day of gas produced, a part will be for internal consumption in the P-51 such as fuel to generate electricity and the rest will be sent to dry land. Brazil wants a naval construction base that will supply the needs of Brazil and the entire world. The P-51 will be anchored in the Marlim Sul field of 1,255 m depth 150 km offshore and will be connected to 19 wells (10 producing oil and gas and 9 injecting water) and will produce 22° API. The 9 water injection wells will inject 282,000 bpd of water. Energy use will be 100 Mw, enough energy to light a city of 300,000 persons. The patroness of the P-51 platform was the First Lady of Brazil, Marisa Letícia Lula da Silva.", "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market.", "Brazil's oil development continues its remarkable progress; latest figures show crude oil output averaged 160,000 bpd, strong 8% increase over 1967; largest producer became Miranga field, discovered only in 1965 (see Engineering Index 1967 p 1699), where 120 wells have been drilled, and average total output amounted to 39,000 bpd; extensive drilling program has contributed to proven reserves of Petrobras, calculated at end of 1967 at 800 million bbl and 24. 5 billion cu m or around 850 billion cu ft of gas; offshore development is considered most promising, as sedimentary section of about 6000 m thickness has been indicated by previous geophysical and seismic surveys on Continental Shelf.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030." ]

[ "Forty-four companies competed for 23 blocks - 13 offshore and 10 onshore - in Brazil's second bid round in June 2000. That 21 of the 23 blocks on offer were licensed shows that the country remains a big draw among E&P firms. The top bidders include a consortium between Santa Fe Snyder (operator, 45%) and Construtora Norberto Odebrecht (15%), which paid 12.025 million real ($6.68 million) for Block BM-C-8 in the Campos basin; Shell, which offered 65.16 million real for the hotly contested Campos Block BM-C-10, for which it was the sole bidder; and Petrobras, with eight winning bids." ]

[ "A873" ]

[ "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "The consortium operating Block BMS11 offshore Brazil has opened the 10 million cu m/day LulaMexilhao natural gas pipeline. The consortium is comprised of operator Petroleo Brasileiro SA 65%, BG Group 25%, and Petrogal Brasil SAGalp Energia 10%. The system connects the presalt Lula field to the Mexilhao platform in the Santos basin's shallow waters. The 18-in. OD LulaMexilhao pipeline, operating at 250 bar, extends 216 km, starting 2145 m below sea level at the Cidade de Angra dos Reis floating production, storage, and offloading vessel, and ending at the Mexilhao platform, at a depth of 172 m. Mexilhao is the largest fixed production unit in Brazil and the new pipeline as the deepest and longest undersea pipeline ever laid in Brazil. The new pipeline will also transport natural gas from other fields developed as part of Phase 1 of Santos basin presalt operations, with connections to the FPSO developing each, two in the Tupi field, one in Guara.", "The current global financial crisis and other issues have split Brazilian officials regarding the impact of the crisis on exploration and production. However, there have been impacts, as Petroleo Brasilerio SA (Petrobras) now is postponing to 2009 its construction tenders for 28 deep-sea drilling rigs. However, according to energy minister Edison Lobao, the ongoing global financial crisis will not cause delays to the development of the subsalt oil reserves. Another disagreements pertained to the review of the country's oil law, where Lobao said changes will be designed in a way to maintain the interest of foreign investors in the country. However, delays have impacted real cooperation regarding how to maximize development of Brazil's subsalt oil deposits.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "US subsea engineer Global Industries has received a letter of intent from Petrobras to install the 24-in. Camarupim gas pipeline in the Espirito Santo Basin offshore Brazil. The project, valued at ? $165 million, includes project planning, detailed engineering, and installation of 52 km of pipeline, and fabrication and installation of the pipeline-end manifold and tie-in spool. The offshore installation will be performed by Global's pipelay barge Iroquois.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry." ]

[ "Changes in drivers Human civilizations originated and thrived in the floodplains and the deltaic coastal zones of the world’s large rivers, which are now inhabited by about 2.7 billion people (Best, 2019). The rapid increase in the demand for water, food, land and power has led to human interventions, such as the construction of large dams, deforestation, intensive agriculture expansion, urbanization, infrastructural construction and sand mining. Such human activities have placed those systems under immense stress, leading to large-scale and irreversible changes. According to the International Commission on Large Dams (2018), globally, there are 59,071 dams with heights of more than 15 m and related reservoirs of more than 3 million m3. The largest densities of hydropower dams are found in South America, South Asia and Northern Europe. The largest dams, including those have been built, are under construction or are planned, are located in the Mekong River basin, the Amazon River basin and the Congo River basin (Kondolf and others, 2014; Warner and others, 2019). The construction of dams and reservoirs can reduce the sediment supply to the coast by different degrees (Slagel and Griggs, 2008), sometimes by more than 50 per cent (Besset and others, 2019), leading to the erosion of deltas and adjacent coasts. The reduction in sediment supply to the coasts is expected to increase greatly in the twenty-first century (Dunn and others, 2018), by 50 to 100 per cent (Kondolf and others, 2014; Besset and others, 2019). For example, in the Pearl River, China, the construction of two mega dams (Yangtan and Longtan) has reduced the fluvial sediment supply to the coast by 70 per cent over the period 1992–2013 (Ranasinghe and others, 2019). Kondolf and others (2014) found that 140 dams had been built, were under construction or were planned for the Mekong River or its tributaries. Under a “definite future”, if 38 dams that are planned or are under construction are actually completed, the cumulative sediment reduction to the Mekong Delta would be 51 per cent; and if all dams that are planned and under construction are completed, there would be a cumulative sediment reduction to the Mekong Delta of 96 per cent. That would lead to a serious decay of mangrove systems and, as a consequence, the erosion of the coast and irreversible changes in the surrounding ecosystem. On the other hand, there are substantial efforts in States to remove large dams, such as the Elwha Dam in Washington State, United States (Warrick and others, 2015). Sand mined from rivers, beaches and coastal seabeds is used for land reclamation, beach nourishment and industry (Bendixen and others, 2019). That removes significant amounts of sand that would otherwise contribute to littoral transport, consequently resulting in a coastal sediment deficit (Montoi and others, 2017) and affecting the coastal morphology (International Council for the Exploration of the Sea, 2016; Abam and Oba, 2018). Presently, coastal beach and seabed sand mining is common practice in many countries, although it is sometimes illegal. Sand mining, in general, is known to take place in 73 countries on five continents, although there is no reliable figure on the practice worldwide (Peduzzi, 2014; Jayappa and Deepika, 2018)." ]

[ "B2455" ]

[ "Increased use of ocean space Offshore hydrocarbon industries The growth of the offshore oil and gas industry has increased the demand by that sector for access to ocean space within areas under national jurisdiction (including space for pipelines to bring the hydrocarbon products ashore). More than 620,000 km² (almost 9 per cent) of the exclusive economic zone (EEZ) of Australia is subject to oil and gas leases. In the United States, about 550,000 km² of the whole EEZ is subject to current oil and gas leases, including 470,000 km² in the Gulf of Mexico, representing 66 per cent of the EEZ of the United States in that area. When such significant proportions of the ocean areas under national jurisdiction are thus subject to such prior claims, overlaps in sectoral interests become inevitable. Offshore mining Offshore mining is currently confined to shallow-water coastal regions, although growing exploration activity is focused on deep-sea minerals. About 75 per cent of the world’s tin, 11 per cent of gold, and 13 per cent of platinum are extracted from the placer deposits near the surface of the coastal seabed, where they have been concentrated by waves and currents. Diamonds are also an important mining target. Aggregates (sand, coral, gravel and seashells) are also important: the United Kingdom, the world’s largest producer of marine aggregates, currently extracts approximately 20 million tons of marine aggregate per year, meeting around 20 per cent of its demand. Those activities are all concentrated in coastal waters, where other demands for space are high. Deep-water deposits that have generated continuing interest, but are not currently mined, include ferromanganese nodules and crusts, polymetallic sulphides, phosphorites, and methane hydrates. Demands for deep-sea space are likely to develop in the future.", "The present chapter provides an update to chapter 23 of the first World Ocean Assessment (United Nations, 2017a) in terms of shallow-water aggregate, placer deposits, ironsand deposits and phosphorite deposits. It focuses on exploration licences for deepwater seabed mineral resources, the number of which has increased significantly since the first Assessment. New technologies to reduce impacts on the marine environment are now envisaged for the exploitation of placer deposits, traditionally mined by dredging. Prospects for mining phosphorite deposits have faced opposition from stakeholders and have yet to become a reality. Seabed mineral deposits covered in the present chapter (polymetallic nodules, polymetallic sulphides and cobalt-rich ferromanganese crusts) are being considered for mining and the object of 30 contracts for exploration awarded by the International Seabed Authority (ISA). One driver for those activities is that deepwater seabed mineral resources contain diverse rare and critical metals that would support the implementation of Sustainable Development Goals adopted by the United Nations in 2015. The environmental impacts of the exploitation of those seabed mineral resources are a scientific community focus, and regulations are now being developed by ISA. A lack of information on biodiversity, connectivity and ecosystem services exists, and a robust collection of baseline ecological data is necessary for predictions related to the future deepwater seabed mining activities, given the risk of irreversible damage to deep-sea ecosystems. ISA has considered various financial models for the commercial mining of polymetallic nodules. Metal prices are difficult to predict, which can create significant risk that may delay commercial mining. Deepwater seabed mineral resources are typically located far from human communities and the social impacts of their exploitation may be less than those of terrestrial mining. However, significant concerns exist about loss of biodiversity and ecosystem services, including the role of the deep ocean in climate regulation. Those legitimate concerns constitute the basis for a “social licence to operate”.", "Increasing inputs of harmful material Offshore hydrocarbon industries Major disasters in the offshore oil and gas industry have a global, historical recurrence of one about every 17 years. The most recent is the Deepwater Horizon blowout of 2010, which spilled 4.4 million barrels (about 600,000 tons) of oil into the Gulf of Mexico. The other main harmful inputs from that sector are drilling cuttings (contaminated with drilling muds) resulting from the drilling of exploration and production wells, “produced water” (the water contaminated with hydrocarbons that comes up from wells, either of natural origin or through having been injected to enhance hydrocarbon recovery), and various chemicals that are used and discharged offshore in the course of exploration and exploitation. Those materials can be harmful to marine life under certain circumstances. However, it is possible to take precautions to avoid such harm, for example by prohibiting the use of the most harmful drilling muds, by limiting the proportion of oil in the produced water that is discharged or by controlling which chemicals can be used offshore. Such regulation has been successfully introduced in a number of jurisdictions. Nonetheless, given the growth in exploration and offshore production, there is no doubt that those inputs are increasing over time, even though exact figures are not available globally. Produced water, in particular, increases in quantity with the age of the field being exploited. Offshore mining The environmental impacts of near-shore mining are similar to those of dredging operations. They include the destruction of the benthic environment, increased turbidity, changes in hydrodynamic processes, underwater noise and the potential for marine fauna to collide with vessels or become entangled in operating gear.", "In a scenario of huge investments in the quest for new oil and natural gas discoveries, the oil industry has reached a consensus: no easy fields to be developed remain undiscovered, especially in offshore environments. New and old challenges on well drilling such as drilled extensions over 6000 m, sub-salt drilling, very narrow operational windows, operational problems like lost of circulation, stuck pipe, and kicks are aggravated when drilling in high pressure and high temperature (HPHT) environments. In the world's exploratory context, the occurrence of HPHT areas is an increasing trend. It is the materialization of the worst case scenario for well drilling and safety, formed by great challenges and operational, environmental, and economic risks. Field experience has shown that the economical risks have been overshadowed by the great premium target: increments on reserves. However, if the well safety aspect is dealt with the conventional approach, the oil industry is at risk of losing its investments, causing great impacts to the environment and also to the company's image. Since HPHT well construction costs are so much higher than those of traditional wells, the scope of knowledge and science on well safety, once limited to kick prevention and well control contingencies, are now an integral part of the technical and economic feasibility of well construction. Within this context, this work surveys the best HPHT techniques and procedures practiced by the oil industry, presents the new researches and trends and shares some valuable lessons learned on Petrobras' operations in Brazil and throughout the world.", "While some benefits from the ocean are very central and ensure the existence of life on earth, including the production of oxygen and the uptake of carbon dioxide and heat, most services are related to specific ecosystems or elements therein and are thus not evenly distributed. Moreover, not all States have the capacity to participate fully in and benefit from the ocean and its resources. That may be because they either do not have access to the ocean, such as landlocked States, or do not have the financial means to develop maritime industries, which is the case for many developing countries. Some States do not have the capacity for access to areas beyond national jurisdiction or even parts of their own exclusive economic zone. For example, in areas beyond national jurisdiction, the collection of marine genetic resources, their sequencing and potential commercialization are currently concentrated in a small number of countries (Blasiak and others, 2018; 2019; Harden-Davies, 2019; Levin and Baker, 2019). One of the main provisioning services, living resources, is not only unevenly distributed, with productivity hotspots concentrated in the upwelling areas of the world (Kämpf and Chapman, 2016), but a very substantial proportion of capture fisheries is carried out by relatively few fishing vessels from few States. Vessels from 25 States took 42 per cent of the global catch in 2016 (FAO, 2018). Thus, profits are not necessarily going to the countries with the exclusive economic zone in which the fishes are produced. McCauley and others (2018) found that vessels flagged to higher-income nations, for example, are responsible for 97 per cent of trackable industrial fishing on the high seas and 78 per cent within the national waters of lower-income countries. Economic assessments of the cultural benefits of ecosystem services are increasingly undertaken by applying environmental valuation methods to recreational uses such as tourism, marine recreational fishing, whale watching, and enjoying the seascape (Hanley and others, 2015; Aanesen and others, 2015; Spalding and others, 2017), as well as non-use values (i.e., existence and bequest values) of coral reefs and other marine biodiversity (Aanesen and others, 2015; Navrud and others, 2017). Tourism relies particularly on specific characteristics such as coral reefs (Brander and others, 2007) and specific activities such as cruise tourism, and are concentrated in certain areas such as the Caribbean and the Mediterranean but increasingly in polar areas too (see chap. 8A).", "About 40 per cent of the world’s population lives in the coastal zone, that is, within 100 km of the coast. The proportion is increasing. Coastal communities play a key role in supporting all components of the ocean economy, as well as a range of social and cultural values, and all forms of coastal and marine management and governance. While coastal communities often have to deal with physical and social vulnerabilities, they are crucial contributors to conservation, to marine hazard responses and to climate mitigation and adaptation. The ocean supports a wide range of economic activities, including the harvesting of food, shipping, seabed mining, offshore hydrocarbon exploration and exploitation, tourism and recreation, use of marine genetic resources, production of fresh water by desalinization and production of salt. The various economic activities are steadily growing in scale. Separate chapters in part 5 of the present Assessment, on trends in pressures on the marine environment, give more detail on areas not discussed in depth here. Shipping carries about 90 per cent by volume of international trade, which makes it fundamental to the global economy. It is still recovering from the economic crisis of the period 2008–2011. Globally, tourism continues to grow at about 6 per cent per year. Coastal tourism represents a substantial proportion of overall economic activity for many countries, especially small island developing States and archipelagic States. Shipping and tourism have been seriously dislocated by the COVID-19 pandemic. Desalinization continues to grow in importance, in particular in the Middle East, North Africa and small island States and archipelagic States. Sea salt production also continues at a generally steady level, but accounts for only about one eighth of total salt production.", "Increasing inputs of harmful material Human health, food security and food safety Marine biotas are under many different pressures from hazardous substances on reproductive success. Dead zones and low-oxygen zones resulting from eutrophication and climate change can lead to systematic changes in the species structure at established fishing grounds. Either can reduce the extent to which fish and other species used as seafood will continue to reproduce at their historical rates. When those effects are combined with those of excessive fishing on specific stocks, there are risks that the traditional levels of the provision of food from the sea will not be maintained. In addition, heavy metals and other hazardous substances represent a direct threat to human health, particularly through the ingestion of contaminated food from the sea. The episode of mercury poisoning at Minamata, in Japan, is probably the most widely known event of that kind, and the reason why the global convention to address such problems is named after the town. There are places around the world where local action has been taken to prevent or discourage the consumption of contaminated fish and other seafood. In other places, monitoring suggests that levels of contamination dangerous for human health are being reached. In yet other places, there are inadequate monitoring systems to check on risks of that kind. Ensuring linkages between adequate systems for controlling the discharge and emissions of hazardous substances and the systems for controlling the quality of fish and other seafood available for human consumption is therefore an important issue. In the case of subsistence fishing, the most effective approach is to ensure that contamination does not occur in the first place. The lack of proper management of wastewater and human bodily wastes causes problems for human health, both directly through contact with water containing pathogens and through bacteriological contamination of food from the sea, and indirectly by creating the conditions in which algal blooms can produce toxins that infect seafood. Those problems are particularly significant in and near large and growing conurbations without proper sewage treatment systems, such as found in many places in developing countries.", "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion.", "Manganese (Mn) is an abundant element in terrestrial and coastal ecosystems and an essential micronutrient in the metabolic processes of plants and animals. Mn is generally not considered a potentially toxic element due to its low content in both soil and water. However, in coastal ecosystems, the Mn dynamic (commonly associated with the Fe cycle) is mostly controlled by redox processes. Here, we assessed the potential contamination of the Rio Doce estuary (SE Brazil) by Mn after the world's largest mine tailings dam collapse, potentially resulting in chronic exposure to local wildlife and humans. Estuarine soils, water, and fish were collected and analyzed seven days after the arrival of the tailings in 2015 and again two years after the dam collapse in 2017. Using a suite of solid-phase analyses including X-ray absorption spectroscopy and sequential extractions, our results indicated that a large quantity of MnII arrived in the estuary in 2015 bound to Fe oxyhydroxides. Over time, dissolved Mn and Fe were released from soils when FeIII oxyhydroxides underwent reductive dissolution. Due to seasonal redox oscillations, both Fe and Mn were then re-oxidized to FeIII, MnIII, and MnIV and re-precipitated as poorly crystalline Fe oxyhydroxides and poorly crystalline Mn oxides. In 2017, redox conditions (Eh: -47 ± 83 mV; pH: 6.7 ± 0.5) favorable to both Fe and Mn reduction led to an increase (~880%) of dissolved Mn (average for 2015: 66 ± 130 µg L-1; 2017: 582 ± 626 µg L-1) in water and a decrease (~75%, 2015: 547 ± 498 mg kg-1; 2017: 135 ± 80 mg kg-1) in the total Mn content in soils. The crystalline Fe oxyhydroxides content significantly decreased while the fraction of poorly ordered Fe oxides increased in the soils limiting the role of Fe in Mn retention. The high concentration of dissolved Mn found within the estuary two years after the arrival of mine tailings indicates a possible chronic contamination scenario, which is supported by the high levels of Mn in two species of fish living in the estuary. Our work suggests a high risk to estuarine biota and human health due to the rapid Fe and Mn biogeochemical dynamic within the impacted estuary.", "Patterns of biodiversity Biodiversity and economic activity Sometimes, because of the special physical features that contribute to high biodiversity, and sometimes because of the concentration of biodiversity itself, many societies and industries are most active in areas that are also biodiversity hotspots. As on land, humanity has found the greatest social and economic benefits in the places in the ocean that are highly productive and structurally complex. For example, 22 of the 32 largest cities in the world are located on estuaries; mangroves and coral reefs support smallscale (artisanal) fisheries in developing countries. Biodiversity hotspots tend to attract human uses and become socioeconomic hotspots. Hence biodiversity-rich areas have a disproportionately high representation of ports and coastal infrastructure, other intensive coastal land uses, fishing activities and aquaculture. This is one of the major challenges to the sustainable use of marine biodiversity. Some marine features, such as seamounts, often found in areas beyond national jurisdiction, have high levels of biodiversity, frequently characterized by the presence of many species not found elsewhere. Significant numbers of the species mature late, and therefore reproduce slowly. High levels of fishing have rapidly undermined the biodiversity of many such features, and risk continuing to do so in the absence of careful management. New forms of economic activity in the open ocean, such as seabed mining, and the expansion of existing forms of activity, such as hydrocarbon extraction, have the potential to have major impacts on its biodiversity, which is to date poorly known. Without careful management of those activities, there is a risk that the biodiversity of areas affected could be destroyed before it is properly understood." ]

[ "Forty-four companies competed for 23 blocks - 13 offshore and 10 onshore - in Brazil's second bid round in June 2000. That 21 of the 23 blocks on offer were licensed shows that the country remains a big draw among E&P firms. The top bidders include a consortium between Santa Fe Snyder (operator, 45%) and Construtora Norberto Odebrecht (15%), which paid 12.025 million real ($6.68 million) for Block BM-C-8 in the Campos basin; Shell, which offered 65.16 million real for the hotly contested Campos Block BM-C-10, for which it was the sole bidder; and Petrobras, with eight winning bids." ]

[ "A846" ]

[ "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "Brazil's oil development continues its remarkable progress; latest figures show crude oil output averaged 160,000 bpd, strong 8% increase over 1967; largest producer became Miranga field, discovered only in 1965 (see Engineering Index 1967 p 1699), where 120 wells have been drilled, and average total output amounted to 39,000 bpd; extensive drilling program has contributed to proven reserves of Petrobras, calculated at end of 1967 at 800 million bbl and 24. 5 billion cu m or around 850 billion cu ft of gas; offshore development is considered most promising, as sedimentary section of about 6000 m thickness has been indicated by previous geophysical and seismic surveys on Continental Shelf.", "The 3 million bpd of crude oil produced globally in deep waters represent only 4% of the total explored volume by the petroleum industry. However, the expectation of a large increase in demand for energy in the coming decades is attracting new investments by oil companies. Although a matter that dominates the scene in Brazil, E&P in deep waters has marginal international participation and encounters unexplored frontiers. The global oil industry has discovered about 60,000 million bbl of petroleum in deep waters, half of which since 1995 has occurred in Brazil, Gulf of Mexico, and Western Africa, according to one study. In a study by the Total company, 90% of the global reserves of petroleum in deep waters of about 50,000 million bbl, are to be found in the \"Golden Triangle\" of the petroleum industry, namely, Brazil, Gulf of Mexico, and Western Africa. There is a consensus that the high prices for petroleum are an indication that exploration for petroleum in deep waters off Latin America may significantly increase the reserves of the region. The world consumes about 75,000 million bpd of crude oil and 6.5 MMM cu m/day of natural gas. Hardly some 3 MM bpd of crude oil are produced in deep waters or 4% of the total volume explored. In the coming three decades the demand for energy is expected to increase by two thirds and between now and 2015 the production in deep waters could triple reaching over 8 MM bpd. In the Offshore Magazine study on FPSO, of the 106 FPSO now operating in 23 countries, 16 are in Brazil. Of the 106 FPSO, 13 operate in waters at greater than 1,000 m depth. Of these 13, 7 are in Brazil, 4 in Angola, and 2 in Nigeria. In 2006, 21 FPSO are being built or being converted in the world and 56 FPSO are being bid for, will be bid for, or are in the final stage of conception and design. The large part of these projects is Brazilian. From now to 2010, 2,011 new underwater production projects will be initiated in Brazil that will include about 20 new platforms. In addition to offshore Brazil, Petrobras is active offshore Argentina and Colombia and has joined with large companies to explore in deep waters in the Gulf of Mexico.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina." ]

[ "We applied a combined approach of benthic terrain modelling with sediment type distribution, using regional available data sets in order to map the distribution of seabed physical habitats along the Espírito Santo Continental Shelf, Brazil. The Benthic Terrain Modeler (BTM) was used to define benthic terrain classes, which were combined with ground truth data (sediment samples and seabed images) to produce physical habitats (seascapes). Eight BTM classes were defined: flat bottom, rough, depression, valley flank, valley bottom, shelf break, crests, and deep crests. The combination of the BTM classes with sediment distribution produced 17 types of physical habitats. Analysis showed that shelf morphology controls the pattern of habitat distribution, combined with two major sedimentary processes: riverine sediment input and carbonate sedimentation. Seven types of physical habitats area associated with the flat bottom morphometric class, and five types of physical habitats are associated with rough/irregular morphometric classes. These are the two main broad categories observed along the shelf, when combined with the presence of rhodoliths. Shelf-incised valleys, combined with rhodolith beds, are the most conspicuous seascape along the ESCS. These seascapes add slope and roughness to the shelf seabed, producing great morphological complexity and potentially supporting diverse benthic communities." ]

[ "A1302" ]

[ "All published chronostratigraphic charts of the Espírito Santo basin, Brazil, show stratigraphic frameworks based on second-order depositional sequences. The absence of published high-resolution biostratigraphic analyses precludes the proposition of a higher order stratigraphic framework. This work breaks down the second-order depositional sequences, from Campanian to Maastrichtian succession in the drift phase of Espírito Santo offshore basin, in three third-order depositional sequences based upon seismic interpretation of a hierarchical scheme of channel on continental slope setting coupled with a correlation to a global sea-level curve. The resolution of the 2D seismic data analyzed allowed the identification of three levels of erosional surfaces and their subsequent filling, from smaller to higher: composite channels, channel complexes and channel complexes set. Channel complexes development is related to lowstand deposits on the continental slope. Also, the aspect ratio of the channel complexes analyzed are reverse to the expected for channel development on continental slope settings. Usually, the further down-dip the channels are located, the higher their aspect ratio, however, it does not happen in the study case. Most of down-dip channels show a lower aspect ratio. It is ascribed to the control of the seafloor topography by the halokinetics. The identification of the geometric pattern of the channels on seismic data allowed a proposition of an exportable depositional model to predict possible sandy deposits on the continental slope regarding the intensity of salt tectonics.", "The objective of this work is to describe the climate of Espírito Santo and the northern part of the Campos Basin (i.e., the Espírito Santo geographical area - ESGA), which is located in southeastern Brazil. The observed data from the Floating, Production, Storage and Offloading-Brazil platform, operated by Petrobras during the period 2004-2013, are used in this work. The results show that the 10-m wind over the ESGA blows predominantly from the northeast, north and east directions during the year, with moderate intensity (between 4.0 and 7.0 m s-1). The north wind is more intense than the south quadrant wind, which occurs during the passage of the transient systems. The average wind speed depends on the South Atlantic subtropical anticyclone position, which influences the surface pressure gradient over the study area. The wind is weaker during autumn; it reaches a monthly average of 5.3 m s-1 in April and is stronger in September and January (7.3 and 7.1 m s-1, respectively). The mean sea level pressure oscillates between 1012.3 hPa in the summer and 1019.5 hPa in the winter; the 2-m air temperature varies between 23.2°C in September and 27.4°C in March, and the 2-m relative humidity exhibits a minimum of 72.7% in May and a maximum of 84.2% in December. With regard to the frontal systems frequency, an average of 30.2 systems reach the southern ESGA each year, with a maximum in September (3.9 systems) and a minimum in February (0.8 system).", "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin.", "The continental shelf adjacent to the municipality of Salvador (CSS), state of Bahia, is the narrowest sector of the entire Brazilian continental shelf. During most of the Quaternary, this sector of the shelf was exposed to subaereous conditions, since sea level was approximately 45-60 meters below what is currently observed. This long subaereous exposure and resulting erosion were certainly controlled by the heterogeneity of the structural and stratigraphic framework of the Camamu and Jacuípe basins, highlighting relic physiographic features from both basins. The complex seascape that resulted from this prolonged erosion played an important role in controlling the characteristics of shelf sedimentation in episodes when the CSS was flooded during interglacial periods. The objective of the present study was to understand the geological evolution and the structural control of the Camamu /Jacuípe basins over sedimentation patterns of the Continental Shelf of Salvador, during the Quaternary, using seismic-stratigraphic interpretation of high-resolution shallow seismic lines obtained from a boomer plate sound source. Two major stratigraphic units were identified in the study area: the Cretaceous Sedimentary Basin and the overlapping Unconsolidated Quaternary Sediments. Isopach maps of Quaternary deposits and depth maps of the top of the Cretaceous sedimentary rocks showed that the structural framework of the Sedimentary Basin structurally controls shelf sedimentation. Compressional structures that affect the Cretaceous sedimentary rocks in areas near previously mapped transference faults seem to have originated topographic highs on the shelf where coarse bioclastic sedimentation predominates. These highs, in turn, delimitate low areas where fine-grained sediments accumulate. Shelf topographic highs are associated with antiforms in the Camamu/ Jacuípe basins, with their most deformed strata following a WNW-SSE trend. This information is important to aid marine environmental management strategies. Moreover, the present study will allow the evaluation of the controlling factors that determinate narrow shelf sedimentation and stratigraphy, with small accommodation area, as in the case of the CSS.", "Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of Espírito Santo (Brazil) contains evidence of different sedimentary regimes that distribute diverse and complex marine habitats. Herein, seabed morphology, acoustic images of the seafloor (side scan sonar and sub-bottom profiler), and sediment samples were used to investigate the influence of sedimentary regimes on physical marine habitat distribution. Seabed mapping is also integrated with available data on fisheries to understand the influence of shelf morphology and sedimentology in the usage of distinct fishing gears. The results indicate five morpho-sedimentary facies: terrigenous mud, terrigenous sand, rhodolith beds, carbonate gravel with rhodoliths, and hardground. Through an integrated analysis of the geomorphology and sedimentary distribution, two morpho-sedimentary domains were identified: a sediment-fed shelf adjacent to the Doce River associated with a major mud depocenter and a delta front morphology characterized by gentle slopes and low terrain ruggedness, and a sediment-starved shelf dominated by carbonate sedimentation showing an irregular morphology associated with higher slopes and terrain ruggedness. These contrasting morpho-sedimentary domains are a result of sedimentary responses to sea level fluctuation during Late Quaternary, specially, during the deglaciation processes after the Last Glacial Maximum. The morphological and sedimentary contrasts along the area define the physical habitat distribution. The sediment supply regime area is associated with a terrigenous fine/muddy sedimentation bed, which control the local morphology and favors coastal and delta front progradation. This physical habitat is a well-known shrimp-fishing ground where intense trawling takes place, as well as gillnet fisheries targeting weakfish and croakers. The accommodation regime or low sediment influx area is characterized by carbonate sedimentation associated with hardgrounds and rhodolith beds. In contrast, this physical habitat with scarce sediment supply, facilitates extensive benthic colonization by crustose coralline algae (CCA), which is primarily associated to line fisheries, longlines, and spearfishing. Rhodoliths show a high diversity of CCA and the occurrence of an endemic kelp species. Long-term processes such as relative sea level fluctuations and sediment supply are a legacy for the distribution of benthic habitats, and their resulting morphology can be a surrogate for predicting fishing activities or a first-base analysis for marine spatial planning. Available low-resolution bathymetric datasets can be a powerful tool, if applied with caution and in a regional scale approach. Here, terrain variables (terrain slope and ruggedness) derived from an extensive available (low-resolution and interpolated) bathymetric dataset distinguished two contrasting morphological domains characterized by rugged and smooth/flat seabeds.", "The Atlantic Ocean coast region of southeast Brazil contains two coast-parallel mountain ranges (the Serra do Mar and Serra da Mantiqueira) generated by tectonic activity pulses tens of millions years after the main continental rift event occurred around 120 Ma. Although the short-term erosion rates for the region are established, the relative importance of the factors controlling erosion is poorly constrained. We combine new and published catchment-averaged erosion rates (n = 48) using in situ-produced 10Be concentrations in quartz from river sediments to establish the regional erosion pattern. The river catchments are (i) escarpment topography, (ii) high-altitude low-relief and (iii) mixed topography, which record how escarpment fronts are migrating inland. Ocean-facing coastal escarpment catchments of the Serra do Mar (e = 18–53 m/Ma) can be eroded approximately twice as fast as continent-facing escarpment catchments in the Serra do Mar and Serra da Mantiqueira (e = 7–24 m/Ma). The correlation between the normalized channel steepness index (ksn) and slope angle indicates that river incision and hillslope erosion processes combine to maintain the high relief. The Serra do Mar catchments define a mean slope angle threshold indicating that landslides are the dominant erosional process when slope angles in excess of ~30°. Tectonic activity is low and plays no significant role in driving erosion. A first-order relationship between erosion rate and precipitation-temperature across the region implies that climate plays a key role in soil production, river incision and in triggering erosional processes. Although the high topographic relief is a pre-condition for the occurrence of significant erosion, the climatic condition is the outlining factor of the regional variation in erosion rates.", "The main tectonic, stratigraphic and sedimentological aspects of the Aptian Stage along the Brazilian Eastern Basins were analyzed based on data from 28 wells drilled by Petrobras, including the description of 750 meters of cores. The Aptian along the Eastern Margin (from Santos to Camamu-Almada basins) can be subdivided into 2 main packages with specific tectonic and sedimentological characteristics. The Lower Aptian (upper part of Jiquiá to lower part of Alagoas local stages) is characterized by continental sedimentation under rift tectonics. Scarce marine incursions were recognized in this package. Sedimentation occurred mainly in grabens located in the central portions of the rift and in scattered grabens located in proximal areas. This caused subaerial exposure of large proximal areas generating a regional unconformity called \"pre-Upper Aptian Unconformity\". The Upper Aptian (Upper Alagoas local stage) package was deposited under stable tectonic conditions in a sag basin. The lower portion of this unit is characterized by a fluvio-alluvial sedimentation with a widespread occurrence throughout the proximal areas of all marginal basins. Distal sediments however were deposited under shallow marine conditions. At the end of the Aptian a strong period of aridity and the presence of a volcanic barrier, the São Paulo High, allowed the deposition of a very thick evaporitic package (\"Ibura Event\"). These evaporites are estimated to be deposited in about 600,000 years.", "Igneous rocks are widely developed in many hydrocarbon-bearing sedimentary basins in Brazil, and some igneous rocks play positive roles in the oil and gas accumulation process. But so far, no industrial oil or gas flow is discovered in igneous rocks in Brazilian onshore basins. At present, in some literatures published by some researchers, cases of igneous reservoirs in Brazil are inaccurate. The lithology of reservoirs in the Igarape Cuia oil and gas field, the oil and gas field of Urucu and the Barra Bonita gasfield, were previously thought to be volcanic rocks, but now are clastic rocks according to studies, and the igneous rocks in these three oil and gas field can only be acted as indirect and direct cap rocks. Furthermore, igneous rock reservoirs in the Campos Basin and Santos Basin in the Brazilian offshore are briefly analyzed. The representative Badejo oilfield in the Campos Basin has igneous rock reservoirs dominated by basalts which are intercalated with thin layers of volcaniclastic and sedimentary rocks, the storage space are vesicules, fractures and vugular pores, and the porosity of hydrocarbon bearing interval basalt reservoirs ranges from 10% to 15%. In addition, for the Santos Basin, igneous rocks in this basin are dominated by basic rocks, some alkaline intrusive rocks develop good micro spaces, mainly crystal moldic pores, inter- and intra-crystal dissolution pores and fractures, better reservoir intervals are often concentrated such as at sections near to unconformity surfaces and can have porosity of 6%–9% or higher; local pre-salt igneous rock reservoirs in the Santos Basin have the necessary conditions for hydrocarbon accumulation and it will be a new target layer for hydrocarbon exploration.", "Rifting and related normal stress regime in the equatorial continental margin of Brazil ceased during the Late Cretaceous, when the stress regimes in eastern South America and West Africa changed to induce strike-slip or reverse motion. In this study, we explore the postrift tectonic, geomorphic, magmatic, and sedimentary responses to stress changes using the Potiguar Basin, the easternmost basin in the equatorial margin of Brazil, as a case study. We use field and topographic data, 2D seismic reflection lines, vertical electric soundings, and geochronological and borehole data to constrain the stress evolution of the Potiguar Basin from the Late Cretaceous to the Quaternary, discussing the role of basin inversion on sedimentation and landforms. Our results indicate the presence of two strike-slip stress regimes after rifting. The first stress field (SF1) occurred from Late Cretaceous to the middle Miocene and consisted of a N-S-oriented maximum subhorizontal compression and an E-W-oriented extension. The second stress field (SF2) took place from the middle Miocene to the present day and included subhorizontal E-W to NW-SE compression combined with N-S and NE-SW subhorizontal extension. Emplacement of volcanic rocks occurred along transtensional faults, with a principal peak during SF1 at 20–30 Ma and a subordinate peak during SF2 at 5–10 Ma. In response to shortening during SF2, a 70-km-long and 50-km-wide dome formed, where marine Miocene strata were uplifted to ~250 m asl. This uplift induced the displacement of alluvial channels away from the dome. Anticlines formed by transpression along the main NE-SW-striking faults during both SF1 and ST2 acted as traps in the petroleum system. Similar shifts and stress field inversions documented in other areas of the Brazilian continental margin are consistent with the Neogene rise of the Andes and may have implications for reconstructing the tectonic history of the Equatorial Atlantic margin of South America.", "The aim of this work was to carry out a paleoenvironmental study of Holocene sedimentary deposits in the southern sector of Pernambuco's coast (northeastern Brazil). This work addresses an important aspect of Quaternary research that has implications for current climate debates, for instance, how does vegetation react to changing climate and rising sea levels. Thus, we provide a combined approach using sedimentological, palynological, geochemical analyses (stable isotopes i.e., ?13C, ?15N and C:N), in addition to AMS 14C dating from two surficial sediment cores i.e. T4 (up to 150 cm depth) and T5 (up to 136 cm depth) collected from the Formoso River estuarine system. Climatic oscillations show variation in precipitation and atmosphere humidity, marked by areas of expansion and/or retraction of herbaceous plain and forest vegetation. Variations in vegetation composition over the last 7168–7260 cal yr BP in the Formoso River estuary reflects the strong influence of sea-level variations, which were responsible for changes in coastal paleogeography and paleogeomorphology. Changes in vegetation composition indicate its close relationship with transgressive and regressive marine events and corresponding variation of the depositional environment like lakes to coastal lagoons, tidal channels, sandy strand-plain, and the modern estuary of the Formoso River." ]

[ "This article presents a set of analysis and results on Shared-Actuation Control (SAC) techniques, intended for the remote control of valves in subsea manifolds. The discussion covers historical aspects, including presentation of real cases of SAC in Brazilian fields of Petrobras, as well as covers a conceptualization for the technique. The formulated concepts are used indeed to derive a methodology, intended to guide the development of SAC schemes, during engineering projects of subsea manifolds. The discussion is based in part on the unique experience accumulated by Petrobras in the last 20 years, with the development and introduction of a SAC-based subsea manifold in Campos Basin, Brazil, and the latest development efforts ongoing by 2019 for a new generation of SAC, for the application in subsea manifolds to be installed in ultra-deep waters of Pre-Salt fields, in Santos Basin, Brazil. The methodology proposed in this article is based on a comparative approach which aims to incorporate, on design of SAC, the best engineering practices and lessons learned from traditional Electric-Hydraulic Multiplexed Control Systems (EHMCSs). We refer to such approach as the Inheritance & Counterbalance (I&C) Methodology, since it is based on the application of two specific principles, namely, the Inheritance and Counterbalance Principles. The principles are proposed in this article as well. Taking as starting point a set of technical characteristics of EHMCSs, such as employment of redundant subsea electronics and methods of subsea installation, a subsea engineer can apply the I&C Principles to determine if SAC should inherit a given EHMCS characteristic or, if inheritance is not feasible for some reason, adopt alternative requisites on SAC, in order to counterbalance the effects of such no inheritance. The conceptualization of the I&C Methodology allow us effectively applying it, to obtain as result a table of engineering requisites, suitable for SAC schemes destined to subsea manifolds. The proposed table is presented in this article and incorporates several engineering aspects, which are arbitrated from the knowledge on previous applications of Petrobras in subsea control systems. Such applications include both SAC schemes and EHMCSs, featured on fields of Campos and Santos Basins." ]

[ "A1920" ]

[ "Turbulent air-sea heat fluxes were computed from in situ high-frequency micrometeorological data during two research cruises performed in the Southwestern Atlantic Ocean (SWAO) occurring in June 2012 and October 2014. Two different and dynamical areas were covered by the cruises: the Brazil-Malvinas Confluence (BMC) and the Southern Brazilian Continental Shelf (SBCS). The Eddy Covariance (EC) method was used to estimate the air-sea sensible and latent heat fluxes. This paper compares these novel high frequency estimates of heat fluxes with bulk parameterizations made at the same location and time from independent measurements taken onboard the ships. When comparing the EC and bulk-estimated time series of sensible heat fluxes, we found a good agreement both in their magnitude and variability, with small bias (generally < 20 W m-2) between the datasets from the two study areas in the SWAO. However, the EC and bulk latent heat flux comparisons show large biases ranging from 75 W m-2 to 100 W m-2 in the SBCS and BMC, respectively. These biases were always associated with short term, high frequency environmental perturbations occurring either in the atmosphere or in the ocean with the majority related to strong wind burst events and large air-sea temperature gradients. The short period changes in atmospheric conditions were mostly related to the passage of transient synoptic systems over the two study areas. The large air-sea temperature gradients were mostly linked to the surface characteristics of the BMC and SBCS regions, where sharp oceanographic fronts are located. Our results are able to contribute to improving weather and climate simulations of the mid to high latitudes of South America, a region largely influenced by the sea surface temperature patterns of the SWAO in combination with the frequent propagation of transient atmospheric systems.", "Marine mining is the ocean’s new exploration frontier, and polymetallic crusts (PMCs) and ferromanganese nodules are considered a strategic resource for the future. Acoustic geophysical methods are a valuable tool for oceanic research and have been employed for several decades in the exploration of marine resources and environmental evaluations. The main objective of this work was to investigate the correlation between the chemical composition of PMCs from three different areas along the Brazilian continental margin and their physico-acoustic attributes (P-wave velocity, density and acoustic impedance). The results show that the geoacoustic properties of PMCs are correlated to their chemical composition. Measurements showed positive and negative trends between acoustic impedance and studied elements (Fe, Mn, Co, Cu, Zn, W and Ni) according to the direction of measurement, indicting high anisotropy levels. Our study sheds initial light on the correlation between acoustic properties and metal content of PMCs. The study facilitates assessments of the acoustic responses of PMCs allowing more efficient prospection and exploitation compared to ship-board geophysical techniques that are too qualitative to identify PMCs. The results can contribute to determining the best procedures and techniques for more efficient future exploration of this resource.", "A new method developed to evaluate the performance measure of some sub-criteria of the environmental criterion in a Comparative Assessment of various options of the decommissioning of subsea installations in Brazil is presented. The method is based on an adaptation of that proposed by IBAMA in Technical Note N°. 10/2012 (TN 10) used for assessment of environmental impacts required for the licensing of offshore activities in Brazil. By requirement of the Comparative Assessment methodology, there is a need for a numerical evaluation that allows comparing the performance of one alternative over the others. An analytical method was developed based on the combination of environmental attributes that contribute for the magnitude of the impacts (frequency, intensity, extension and duration) and sensitivity of the environmental factors affected (relevance, resilience and reversibility). The importance of the impacts is given by the combination of the environmental sensitivity with the magnitude of the impacts, in the called \"Environmental Impact Importance Score Matrix\". The proposed method provides a performance measure that allows comparing and prioritizing each decommissioning option according to the proposed criteria. It reduces the subjectivity in assessing the importance of the environmental impacts and provides greater transparency and traceability in the assessment of the impacts. As an example, the proposed method is applied for the decommissioning of a rigid pipeline between two platforms in Campos Basin, where the considered decommissioning options are: (a) complete removal by cut and lift and (b) leave in situ. For this particular case, the assessment of the proposed environmental sub-criteria revealed that Option (b) was the preferred option with respect to the impacts on marine and onshore environment.", "Current oil prices have made the offshore exploration of oil reserves a major challenge for oil companies. Standardization and extensive use of chattered units has allowed Petrobras to effectively promote competitiveness, cost reduction and reduced schedules in its projects. As a step forward in its pursue for cost reduction Petrobras has recently looked into Integrated Field Development. This article presents a low cost methodology for the design of production systems. Experience shows that integration among reservoir, flow assurance, subsea, well design and topsides teams is crucial for achieving a successful project. Besides being pursued for a long time, this integration has only been partially achieved in the industry and cost reduction opportunities have been lost. This article shows a cost driven methodology that can be used for guidance in the generation and screening of FEL1 alternatives. Metrics for the various parts of the system have been created and integrated in a simulation environment that allows economic analysis of different sorts. In FEL2 the methodology allows, for example, the evaluation of the number and capacity of platforms, the optimal schedule of well construction, the use of flexible or rigid risers, the diameter of production lines and the choice of technologies for handling streams with high C02 concentration in an integrated way. A simulation of an oil field shows effective results. In this new methodology a representation of each discipline is developed to allow their integration with the objective of making comparative economic analysis of alternatives.", "Estuaries provide an appropriate unit for spatial analyses that permit the establishment of environmental management strategies, based on the existing knowledge of their hydrographic basins. The present study developed a diagnostic approach to landscape and environmental management, based on the theoretical concepts of landscape geoecology and environmental planning, and supported by the techniques of remote sensing and thematic cartography. Thematic maps were prepared representing the structures, functions, and dynamics of the natural and cultural geoecological units formed by the estuaries of three Brazilian rivers - the Itapecuru - State of Maranhão and estuarine complex of the Tubarão river - State of Rio Grande do Norte. These maps show the geoecological units and features, indicating their degree of ecodynamic stability, and the evolutionary trends of the propositional scenarios and zoning, with the objective of defining potential strategies for the planning of land use on different functional scales. Theoretical-methodological models of environmental management were proposed, based on landscape geoecology (geosystem analysis, ecodynamics) and environmental planning (thematic cartography, remote sensing) approaches. These models resulted in summary tables and thematic maps on three scales: (i) regional - hydrographic basin (1:250,000) and (ii) municipal - estuarine (1:100,000), to support the implementation of effective management plans for the study estuaries. This study was coordinated by the Landscape Geoecology and Environmental Planning Laboratory of the Federal University of Ceará, through the CNPq researcher PQ program, State University of Rio Grande do Norte and Federal University of Maranhão. It was also supported by four other Brazilian universities through their graduate and undergraduate research programs. This study represents an important step toward the development and integration of propositional management models based on interdisciplinary and interinstitutional approaches, which provide an ideal approach to the understanding and planning of the estuaries of the northern coast of Brazil, which encompasses two distinct socio-environmental realities, in the humid Amazon region and the semi-arid Northeast.", "The aim of this study is to systematize the knowledge related to the innovation capability of the small and medium enterprises (SMEs) operating in the exploration and production (E&P) of oil and natural gas in Rio de Janeiro state (Brazil). This systematization consists in the early stages of a larger study, which aims to formulate a reference model oriented to the evaluation of the innovation capability of these SMEs, focusing on a maturity trajectory. This model can guide innovation efforts of these companies in order to meet future technological and logistics demands of oil E&P in the Brazilian offshore.", "Mapping of natural gas hydrate systems has been performed successfully in the past using the controlled source electromagnetic (CSEM) method. This method relies on differentiating resistive highly saturated free gas or hydrate bearing host sediment from a less resistive low-saturated gas or brine-bearing host sediments. Knowledge of the lateral extent and resistivity variations (and hence the saturation variations) within sediments that host hydrates is crucial to be able to accurately quantify the presence of saturated gas hydrates. A 3D CSEM survey (PUCRS14) was acquired in 2014 in the Pelotas Basin offshore Brazil, with hydrate resistivity mapping as the main objective. The survey was acquired within the context of the CONEGAS research project which investigated the origin and distribution of gas hydrate deposits in the Pelotas Basin. We inverted the acquired data using a proprietary 3D CSEM anisotropic inversion algorithm. Inversion was purely CSEM data-driven, and we did not include any a-priori information in the process. Prior to CSEM, interpretation of near-surface geophysical data including 2D seismic, sub-bottom profiler and multibeam bathymetry data indicated possible presence of gas hydrates within features identified such as faults, chimneys and seeps leading to pockmarks, along the bottom simulating reflector (BSR) and within the gas hydrate stability zone. Upon integration of the same with CSEM derived resistivity volume, the interpretation revealed excellent spatial correlation with many of these features. The interpretation further revealed new features with possible hydrate presence, which were previously overlooked due to a lack of a clear seismic and/or multibeam backscatter signature. Also, features which were previously mapped as gas hydrate bearing had to be reinterpreted as residual or low saturated gas/hydrate features, due to lack of significant resistivity response associated with them. We further used the inverted resistivity volume to derive saturation volume of the subsurface using Archie's equation.", "Changes in the regional hydrodynamics of the region of the South Atlantic near the east coast of Brazil were evaluated from the beginning to the end of the century. The analysis was based on the anomalies from two downscaling experiments using the HadGEM2-ES outputs for the historical and RCP4.5 runs from the Coupled Model Inter-comparison Project phase 5. The anomalies between the experiments were collected in a system of two nested grids, with 1 / 3 ° and 1 / 12 ° horizontal resolutions. A northward displacement of the Brazil Current (BC), a southward BC transport intensification, and a 1.44 °C increase of the mean values of sea surface temperatures were observed. The sea level rise (SLR) was projected up until 2100 across the study area, and the spatial variations were shown to have an average on SLR rate of 7.30 mm year- 1 for those regions close to the coast. These results highlight the importance of studying climate change and applying methods to enable the evaluation of its effects on coastal zones, especially for regions with few existing studies, such as the Brazilian continental shelf area.", "Increasing pressures on marine environments from multiple sources are resulting in biodiversity loss, habitat damage and fragmentation and disease. Effective implementation of ecosystembased management requires an appreciation of how, and to what extent, human activities and natural events interact and affect different ecosystem components and their functioning. It also requires the identification of solutions to prevent and mitigate the pressures being caused by those interactions. Over the past two decades, many frameworks for assessing the interactions, known as cumulative effects, have been developed. They have used differing approaches and terminologies and have been applied at differing levels. Although approaches vary, cumulative effects assessments (CEAs) conducted to date have mostly involved three main steps: (a) collation of information on the intensity and footprint of activities that may be affecting marine ecosystems; (b) identification of the responses of ecosystem components; and (c) identification of management measures that could be applied in response. Despite their increase in use, assessments focused on particular regions, areas or values that follow the same general steps outlined above are largely lacking from areas outside Europe and North America. The geographical bias in the implementation of CEAs highlights clear knowledge and capacity gaps and the need for the development of approaches that: (a) can be implemented in regions where data are sparse; (b) are easily implementable; and (c) produce outputs that can be readily understood and are translatable to decision-making processes, in particular in developing countries.", "The Southern Brazilian Continental Shelf (SBCS) is one of the more productive areas for fisheries in Brazilian waters. The water masses and the dynamical processes of the region present a very seasonal behavior that imprint strong effects in the ecosystem and the weather of the area and its vicinity. This paper makes use of the Regional Ocean Modeling System (ROMS) for studying the water mass distribution and circulation variability in the SBCS during the year of 2012. Model outputs were compared to in situ, historical observations and to satellite data. The model was able to reproduce the main thermohaline characteristics of the waters dominating the SBCS and the adjacent region. The mixing between the Subantarctic Shelf Water and the Subtropical Shelf Water, known as the Subtropical Shelf Front (STSF), presented a clear seasonal change in volume. As a consequence of the mixing and of the seasonal oscillation of the STSF position, the stability of the water column inside the SBCS also changes seasonally. Current velocities and associated transports estimated for the Brazil Current (BC) and for the Brazilian Coastal Current (BCC) agree with previous measurements and estimates, stressing the fact that the opposite flow of the BCC occurring during winter in the study region is about 2 orders of magnitude smaller than that of the BC. Seasonal maps of simulated Mean Kinetic Energy and Eddy Kinetic Energy demonstrate the known behavior of the BC and stressed the importance of the mean coastal flow off Argentina throughout the year." ]

[ "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin." ]

[ "A571" ]

[ "Located in the Brazilian continental shelf, the so called \"Pre-Salt\" reservoirs with large accumulations of excellent quality, high commercial value light oil have become the most strategic oil production site for Brazil. One of the main challenges that has recently arisen concerns the definition of an adequate process to address the high concentration of carbon dioxide (CO2) presented in their geological formations. For the Pre-Salt basin, several options of offshore carbon dioxide storage have been studied, such as: aquifers, depleted reservoirs, and salt caverns. Although a mined offshore salt cavern has never been constructed, its adoption has been gaining momentum due to the mantle origin of CO2, the thickness of rock layer above the salt layer, and the lack of reservoirs below the carbonate reservoirs capable to store gases. Because of its unprecedent characteristics, the development of such facility implies a series of challenges in terms of safety and integrity aspects. Using tailored qualitative risk management tools, this paper explores the many aspects and interdependencies of well design, well clustering configuration, drilling, solution mining, CO2 disposal, and abandonment phases related to offshore salt caverns. The results obtained so far indicated that, technically, they are a feasible solution for Pre-Salt CO2 storage. However, economic and environmental viability strongly depends on well clustering configuration and solution mining process.", "The Santos Basin Pre-salt reservoirs are located in deepwater offshore Brazil and although the oil has a good quality, their CO2 concentrations are higher than those generally found in other Brazilian fields. PETROBRAS and its partners established that they will not vent the CO 2 produced in the Pre-salt layer to the atmosphere so a CO 2 injection scenario is a potential alternative to improve the oil recovery. An extensive monitoring program is being considered in order to ensure the Carbon Capture and Geological Storage (CCGS) projects efficiency. However, there are several challenges to be confronted concerning the CO2 monitoring in such adverse conditions as the Presalt reservoirs. Among the existing techniques for monitoring offshore storage sites, some of them have already technological maturity and applicability to the Pre-salt environment but other methods must rely on some development or methodology adaptation to the specific features of these fields and they will be initiatives of the PRO-CO2 technological program of PETROBRAS Research Center. This paper addresses the main technological challenges for PETROBRAS and its partners related to the methods applicability for the CO2 storage monitoring in the Santos Basin Pre-salt Cluster and also exposes the strategies found to solve the problems.", "The \"Pre-salt application\" offers some unique and challenging difficulties for producers and the service companies who support their operations. The carbonate reservoirs which occur in Brazilian deepwater fields provide unique challenges that relate to high temperatures, the high H2S content, as well as severe saline and scaling conditions. It is quite common to find oil and gas fields with estimated H2S level in the produced gas between 100 and 200 ppmv and salinity approximately 230,000 mg/L. Hydrogen sulfide is a poisonous gas, very harmful to life, and removal is essential to comply with sulfur emissions, as well as to ensure system and pipeline integrity.", "Mega oil and gas reservoirs have been discovered in deep and ultra-deep offshore Brazil. These Pre-Salt discoveries are remotely located at water depths ranging from 2200m (~7,200 ft) to 2600 m (~8,500 ft). Offshore Brazil has unique metocean conditions with long swell periods which present challenges on floating platforms such as Spars and Semis. In addition, the remoteness of location and the associated high cost of vessel mobilization add further pressure on economics and risk. Quayside integration is thus a desired feature of the hull concept in order to eliminate offshore mating and the associated risk to cost and schedule. To explore these pre-salt complicated ultra-deepwater reservoirs usually require large drilling rig and drilling variable payload which result in very large topsides in both size and weight. Spars and TLPs are the only two proven dry tree hull forms in deep and ultra-deep waters in the GOM. However the TLP becomes cost prohibitive if the water depth is beyond 1,524 m (5,000 ft). For large payload systems requiring a large drilling rig, a suitable Spar size creates a challenge for transportation and installation. The semi-submersible hull form is known to offer advantages over Spars such as larger deck space and quayside integration which are essential to reducing offshore commissioning time and risk as well as cost and schedule. Maturation of the dry tree semi-submersible solution in GoM ultra-deepwater (2,400m) had been undertaken by RPSEA and dry tree Paired Column Semisubmersible (PC Semi) platform, developed by Houston Offshore Engineering, was selected by the RPSEA committee in 2009. Extensive wind tunnel tests and wave basin model tests including 1,000-year central GoM hurricanes were successfully completed in 2010. PC Semi hull configuration, TTR stroke, the analytical results and simulation tools had been fully validated. This paper presents validation analysis results of a dry tree PC semi developed with conventional RAM style tensioners, in 2,400m ultra-deepwater of Offshore Brazil Pre-Salt carrying same topsides payloads as RPSEA. The validation analysis was performed by the correlated analysis tools and established analysis procedures. The design efficiencies including payload, steel weight and production efficiencies of PC Semis for BPS and central GoM are addressed and discussed. Highly efficient PC Semi for BPS has been developed, validated and became \"market ready\".", "Offshore logistical operations can be complicated. Companies need to keep tabs on all equipment and products necessary to keep exploration and production moving. Operators and service companies such as Brazil's Petrobras and Schlumberger are contemplating ways in which to simplify the process of tracking assets locally and around the globe. Swerdlow told the panel that RFID cannot replace barcodes and enterprise systems such as SAP and Oracle, but RFID tags can centralize control of physical processes with little localized realtime process visibility, monitoring, and decision making. RFID & RTLS (real-time locating system) can provide an effective and proven real-time bridge and report actual process events as they happen. Nathalia da Silva Sena, technical consultant, Petrobras, presented some of the challenges Petrobras has to deal with in terms of meeting E&P demands. With continued growth in both the Santos and Campos basins, Petrobras has to meet both long-distance and infrastructure challenges, all the while deciding how to best utilize the equipment the national player already has.", "The Santos Basin Pre-Salt Cluster (SBPSC), Offshore Southeast Brazil, is a unique scenario, posing great development challenges. The microbial carbonate reservoir is unusual regarding its origin and petrophysical properties; the fluids have a variable CO2 content; the few analogue reservoirs around the world do not compare in terms of volumes, water depth and distance to the coast; and there are also flow assurance issues. Considering the importance of these reserves for the Brazilian economy and the opportunity to accelerate cash flow, Petrobras and its partners have opted for a fast track development, including extended well tests (EWTs) and production pilots. The current Petrobras Business Plan (2011-15) foresees mat the SBPSC areas alone will produce over 500,000 boe/d in 2015 and over 1,100,000 boe/d in 2020. These numbers refer only to Petrobras share and do not include me transfer of rights with economic compensation from the Brazilian government to Petrobras. Therefore, the initial development phase will have to cope with several uncertainties, mainly the subsurface ones. Some of the most relevant are the quality and the heterogeneity degree of each reservoir zone; the compositional grading of the fluids; the performance of different EOR methods; and the presence of fractures affecting the flow. How to specify and anticipate the acquisition of expensive equipment, such as FPSOs and subsea devices, with uncertainties to be clarified? When is it worth to invest in more data acquisition, such as EWTs, core and fluid sampling, extensive lab analysis or even more appraisal wells? The timing and the uncertainty reduction foreseen for each initiative must be taken into account. On the other hand, when is it better to pay for extra flexibilities, accepting the inevitable CAPEX increase? Some examples would be: smart completions and possibility to inject different chemical products in the wells; gas and water separated lines for each satellite injector; flexible subsea layout, allowing multiples strategies and the addition of more wells; FPSO plants designed to inject desulphated water, or to export, import or reinject me gas, and also to separate variable CO2 contents in the produced fluids. This paper aims to discuss the influence of the main subsurface uncertainties in the selection of alternatives to develop the giant fields in the SBPSC, in a fast track way.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "Bijupirà & Salema field is located in the Campos Basin offshore Brazil in water depths ranging from 600 to 800 meters. A consortium led by Enterprise Oil and its partners, Odebrecht and Petrobras, is developing the fields. The two fields will be developed as subsea tiebacks to an FPSO with offset distances ranging from 2 to 3 km. The system comprises subsea manifolds, flowlines and risers with capability for round trip pigging. The paper will provide a brief overview of the main flow assurance challenges. Two of the flow assurance challenges highlighted include hydrates management and liquid slugging. During various production operations, produced fluids can potentially be cooled by the surrounding cold water, resulting in gas hydrates. Such blockages can plug the bore of the subsea tree, tree piping, well jumper, manifolds, flowlines and risers, causing loss of production and inability to open or close subsea valves. The hydrate management philosophy for this project considered the following: Use a combination of chemical injection using either ethanol or methanol and thermal insulation. Thermal insulation on subsea production system to provide sufficient cool down time without operator action. For long-term unplanned shut down, flowlines and risers can be depressurized and displaced. Circulate \"dry\" hot oil in the flowlines and risers prior to re-start. Hydrate inhibitor injection into the subsea system during start up and shut down. Liquid slug behavior is another important consideration in the design of the production system. Large liquid slugs arriving at the FPSO can cause several problems, such as exceeding the capacity of the topsides separators, impact loads on topsides piping and swivels, vibration of risers, and erratic well flow behavior. Severe slugging is likely in the Salema flowlines due to the combination of downhill profile from the manifold towards the riser base and the potentially low flow rates expected. This paper will present an overview of the selection and design process adopted to manage hydrates and liquid slugging for this field development considering system thermal and hydraulic performance, cost and ease of field installation and production operations.", "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "In the current scenario, the drilling of oil and gas wells in Brazilian offshore basins faces the barrier of crossing salt sequences to 2000 meters thick. In addition to the thickness, these sequences present in their composition different saline lithotypes with different physical and mechanical behavior. The characterization of the mechanical properties of the evaporite section is of extreme importance for well projects, especially the design of casings and the selection of drilling fluids. In the present paper, the several saline lithotypes and their mechanical properties were used to group then into mechanofacies. In addition, the use of mechanofacies allows the identification of regions with anomalous mechanical behavior. The 3D model was able to represent the heterogeneity of the mechanical behavior observed in the evaporite section of the study area. Validation wells were used to verify the methodology and good results were observed." ]

[ "Sevan Marine has let a contract to a unit of John Wood Group plc for the operation and management of the Sevan Stabilized Platform (SSP) Piranema, a floating production, storage, and offloading (FPSO) vessel. The FPSO will be operated for Petrobras in Piranema oil field off northeastern Brazil. The vessel will be the first implementation worldwide of Sevan Marine's SSP cylindrical monohull design. Piranema's design includes 30,000 bpd of oil process plant capacity, a gas injection plant with 3.6 million cu m/day of compression capacity, and 300,000 bbl of oil storage capacity. Piranema also can accommodate as many as 21 risers." ]

[ "A702" ]

[ "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "The Piúma lineament, located in the Southern Espírito Santo State, Brazil, is one of the most prominent linear morphostructural features of the northern Mantiqueira Province. The lineament stands out in satellite images and topographic maps, extending for about 70 km in a N50°W direction, between the towns of Iconha and Conceição do Castelo (Espírito Santo). In order to investigate the nature and role played by the Piúma lineament in the tectonic evolution of the Mantiqueira Province and adjacent Campos Basin, we carried out a detailed structural analysis based on fieldwork, as well as geophysical data processing and interpretation. The results we obtained indicate that the Piúma lineament is a brittle shear zone characterized by N50W-trending and SW-dipping shear fractures, faults and joints. These structures record two distinct and incompatible motions, thereby recording the operation of two tectonic regimes: NNE-SSW extension and E-W transtension. Comparing our results with the literature on the Southeastern Brazilian Continental Margin, we conclude that the Piúma lineament more likely developed after the Ediacaran Brasiliano orogenic event in response to an NNE-SSW extension, experiencing later a reactivation as normal dextral to dextral transtensional zone, probably in connection with the South Atlantic rifting in the Lower Cretaceous.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted.", "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "Guara BV, an affiliate of Petrobras, has signed a letter of intent to charter a floating production, storage, and offloading vessel for use on Block BM-S-9 in the Santos basin offshore Brazil. The platform will have a processing capacity of ~ 100,000 bpd of oil and 5 million cu m/day of natural gas. The FPSO will be provided and operated by Modec Inc and Schahin Petroleo e Gas SA for the BM-S-9 consortium for a 20-yr period. Delivery is expected in June 2016, and production is expected to begin 2 mo after the delivery. The consortium is planning to connect at least 8 wells, 4 as producing wells and 4 for injection, to the vessel from the presalt layer in the Carioca area.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008.", "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico.", "The continental margin of Brazil in intraplate South America exhibits a seismicity rate 70% higher than the average stable continental regions. This margin encompasses Northeastern Brazil, where most of the seismicity and active faults concentrate along the coast. The current study presents an integration of high-resolution aeromagnetic, seismological, and geological data to investigate the relationship between the seismicity and basement fabric in two areas in the northern part of the Precambrian Borborema Province. Our investigation indicates a relation between the metamorphic basement foliation and two seismogenic faults. In the first area adjacent to the Transbrasiliano Lineament, the largest continental suture zone in the South American platform, the magnetic anomaly patterns indicate that the regional basement grain and structural elements are E-W-oriented, which coincides with the strike of the E-W-striking, strike-slip Riacho Fundo Seismogenic Fault. In the second area, the magnetic anomaly patterns also coincide with the NE-SW-striking, strike-slip Samambaia Fault, and a swarm of chalcedony-quartz veins. Euler deconvolution used to estimate the source depth of the magnetic anomalies indicates that the faults in both cases could be longer and deeper than segments illuminated by the present-day seismicity. Although these findings are difficult to use as predictive tools, they indicate that the basement fabric could be reactivated by seismicity in continental interiors, as previously discussed in several cases in Brazil.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability." ]

[ "The global ocean covers 71 per cent of the Earth’s surface, and contains 97 per cent of all the surface water on Earth (Costello et al., 2010). Freshwater fluxes into the ocean include: direct runoff from continental rivers and lakes; seepage from groundwater; runoff, submarine melting and iceberg calving from the polar ice sheets; melting of sea ice; and direct precipitation that is mostly rainfall but also includes snowfall. Evaporation removes freshwater from the ocean. Of these processes, evaporation, precipitation and runoff are the most significant at the present time. Using current best estimates, 85 per cent of surface evaporation and 77 per cent of surface rainfall occur over the oceans (Trenberth et al., 2007; Schanze et al., 2010). Consequently, the ocean dominates the global hydrological cycle. Water leaving the ocean by evaporation condenses in the atmosphere and falls as precipitation, completing the cycle. Hydrological processes can also vary in time, and these temporal variations can manifest themselves as changes in global sea level if the net freshwater content of the ocean is altered." ]

[ "B2525" ]

[ "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "The winds in the atmosphere are the main drivers of these ocean surface currents. The interface between the ocean and the atmosphere and the effect of the winds also allows for the ocean to absorb oxygen and, more importantly, carbon dioxide from the air. Annually, the ocean absorbs 2,300 gigatonnes of carbon dioxide (IPCC, 2005; see Chapter 5). In addition to this vast surface ocean current system, there is the ocean thermohaline circulation (ocean conveyor) system (Figure 3). Instead of being driven by winds and the temperature difference between the equator and the poles (as are the surface ocean currents), this current system is driven by differences in water density. The most dense ocean water is cold and salty which sinks beneath warm and fresh seawater that stays near the surface. Cold-salty water is produced in sea ice “factories” of the polar seas: when seawater freezes, the salt is rejected (the ice is mostly fresh water), which makes the remaining liquid seawater saltier. This cold saltier water sinks into the deepest ocean basins, bringing oxygen into the deep ocean and thus enabling aerobic life to exist.", "The Earth's ocean and atmosphere are parts of a single, interactive system that controls the global climate. The ocean plays a major role in this control, particularly in the dispersal of heat from the equator towards the poles through ocean currents. The heat transfer through the ocean is possible because of the larger heat-capacity of water compared with that of air: there is more heat stored in the upper 3 metres of the global ocean than in the entire atmosphere of the Earth. Put another way, the oceans hold more than 1,000 times more heat than the atmosphere. Heat transported by the major ocean currents dramatically affects regional climate: for example, Europe would be much colder than it is without the warmth brought by the Gulf Stream current. The great ocean boundary currents transport heat from the equator to the polar seas (and cold from the polar seas towards the equator), along the margins of the continents. Examples include: the Kuroshio Current in the northwest Pacific, the Humboldt (Peru) Current in the southeast Pacific, the Benguela Current in the southeast Atlantic and the Agulhas Current in the western Indian Ocean. The mightiest ocean current of all is the Circumpolar Current which flows from west to east encircling the continent of Antarctica and transporting more than 100 Sverdrups (100 million cubic meters per second) of ocean water (Rintoul and Sokolov, 2001). As well as the boundary currents, there are five major gyres of rotating currents: two in the Atlantic and two in the Pacific (in each case one north and one south of the equator) and one in the Indian Ocean.", "Consider how dependent upon the ocean we are. The ocean is vast – it covers seven-tenths of the planet. On average, it is about 4,000 metres deep. It contains 1.3 billion cubic kilometres of water (97 per cent of all water on Earth). But there are now about seven billion people on Earth. So we each have just one-fifth of a cubic kilometre of ocean to provide us with all the services that we get from the ocean. That small, one-fifth of a cubic kilometre share produces half of the oxygen each of us breathes, all of the sea fish and other seafood that each of us eats. It is the ultimate source of all the freshwater that each of us will drink in our lifetimes. The ocean is a highway for ships that carry across the globe the exports and imports that we produce and consume. It contains the oil and gas deposits and minerals on and beneath the seafloor that we increasingly need to use. The submarine cables across the ocean floor carry 90 per cent of the electronic traffic on which our communications rely. Our energy supply will increasingly rely on wind, wave and tide power from the ocean. Large numbers of us take our holidays by the sea. That onefifth of a cubic kilometre will also suffer from the share of the sewage, garbage, spilled oil and industrial waste which we produce and which is put into the ocean every day. Demands on the ocean continue to rise: by the year 2050 it is estimated that there will be 10 billion people on Earth. So our share (or our children’s share) of the ocean will have shrunk to one-eighth of a cubic kilometre. That reduced share will still have to provide each of us with sufficient amounts of oxygen, food and water, while still receiving the pollution and waste for which we are all responsible. The ocean is also home to a rich diversity of plants and animals of all sizes – from the largest animals on the planet (the blue whales) to plankton that can only be seen with powerful microscopes. We use some of these directly, and many more contribute indirectly to our benefits from the ocean. Even those which have no connection whatever with us humans are part of the biodiversity whose value we have belatedly recognized. However, the relationships are reciprocal. We intentionally exploit many components of this biodiverse richness. Carelessly (for example, through inputs of waste) or unknowingly (for example, through ocean acidification from increased emissions of carbon dioxide), we are altering the circumstances in which these plants and animals live. All this is affecting their ability to thrive and, sometimes, even to survive. These impacts of humanity on the oceans are part of our legacy and our future. They will shape the future of the ocean and its biodiversity as an integral physical-biological system, and the ability of the ocean to provide the services which we use now and will increasingly need to use in the future. The ocean is vital to each of us and to human well-being overall.", "Ocean resources provide the basis for the livelihoods of millions of people across the globe, as well as a range of critical ecosystem services, including oxygen production and carbon storage, several biodiversity-related services, such as the harvesting of living resources, coastal protection and genetic resources (Mohammed, 2012) and cultural and amenity services (Whitmarsh, 2011). The most commonly valued services are tourism and recreation, as well as storm protection (Mehvar and others, 2018). Fisheries alone provide multiple benefits to millions of people, including those living in poverty in the coastal communities of low-income countries. Fishes and other seafood are a major source of food, protein and micronutrients for many vulnerable communities. It is estimated that, in 2016, 59.6 million people were employed in the primary sector of capture fisheries and aquaculture, with a great majority in low-income countries (although that figure includes some inland activities). With the addition of those who work in associated processing, marketing, distribution and supply industries, it is estimated that fisheries and aquaculture support nearly 250 million livelihoods (Food and Agriculture Organization of the United Nations (FAO), 2018). Benefits from marine and coastal ecosystems can be categorized in several ways. Traditionally, they have been understood in terms of goods (i.e., products, resources and harvests from nature with a market value), services (i.e., processes that sustain all forms of life but do not have a market value) and cultural benefits (i.e., spiritual and religious heritage, with no explicit market value). While goods have a direct use (consumptive) value, determined through market prices, services and cultural benefits have an indirect use (non-consumptive) value that can be determined through the application of a variety of valuation techniques (see figure). Provisioning services of marine and coastal ecosystems The ocean provides a multitude of direct and indirect benefits of value to humans. The most direct benefit that marine and coastal ecosystems provide is through their primary productivity and the resulting products, such as fishes, plants, animals, fuel, timber (e.g., mangroves), biochemicals, natural medicines, pharmaceuticals, raw materials (sand and corals) and, to a lesser extent, fresh water and fibre. In 2016, 79.3 million tons of marine fishes2 were caught, and 28.7 million tons of marine aquaculture species were farmed, supplying together an average of 14.6 kg of seafood per person on earth (FAO, 2018). Seafood is essential for food security: it provides more than 20 per cent of the average per capita animal protein intake for 3 billion people, and more than 50 per cent in some developing countries (FAO, 2018).", "The major ocean currents connect geographic regions and also exert control on ocean life in other ways. Currents form natural boundaries that help define distinct habitats. Such boundaries may isolate different genetic strains of the same species as well as different species. Many marine animals (for example, salmon and squid) have migration patterns that rely upon transport in major ocean current systems, and other species rely on currents to distribute their larvae to new habitats. Populations of ocean species naturally fluctuate from year to year, and ocean currents often play a significant role. The survival of plankton, for example, is affected by where the currents carry them. Food supply varies as changing circulation and upwelling patterns lead to higher or lower nutrient concentrations. The heterogeneity of the oceans, its water masses, currents, ecological processes, geological history and seafloor morphology, have resulted in great variations in the spatial distribution of life. In short, biodiversity is not uniformly distributed across the oceans: there are local and regional biodiversity “hotspots” (see Chapters 33 and 35). Figure 3 shows a way in which the diversity of species is consequently distributed around the world. Various classification systems have been devised to systematize this variety, including the European Nature Information System (EUNIS) (Davies and Moss, 1999; Connor et al., 2004) and the Global Open Ocean and Deep Sea-habitats (GOODS) classification and its refinements (Agnostini 2008; Rice et al 2011)).", "The complex system of the atmosphere and ocean currents is also crucial to the distribution of life in the ocean, since it regulates, among other factors, (as said above) temperature, salinity, oxygen content, absorption of carbon dioxide and the penetration of light and (in addition to these) the distribution of nutrients. The distribution of nutrients throughout the ocean is the result of the interaction of a number of different processes. Nutrients are introduced to the ocean from the land through riverine discharges, through inputs direct from pipelines and through airborne inputs (see Chapter 20). Within the ocean, these external inputs of nutrients suffer various fates and are cycled. Nutrients that are adsorbed onto the surface of particles are likely to fall into sediments, from where they may either be remobilised by water movement or settle permanently. Nutrients that are taken up by plants and mixotrophic biota for photosynthesis will also eventually sink towards the seabed as the plants or biota die; en route or when they reach the seabed, they will be broken up by bacteria and the nutrients released. As a result of these processes, the water in lower levels of the ocean is richer in nutrients.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "Imbalances in the freshwater cycle manifest themselves as changes in global sea level. Changes in global mean sea level are largely caused by a combination of changes in ocean heat content and exchanges of freshwater between the ocean and continents. When water is added to the ocean, global sea level adjusts, rapidly resulting in a relatively uniform spatial pattern for the seasonal ocean mass balance, as compared to the seasonal steric signal, which has very large regional amplitudes (Chambers, 2006). ‘Steric’ refers to density changes in seawater due to changes in heat content and salinity. On annual scales, the maximum exchange of freshwater from land to ocean occurs in the late Northern Hemisphere summer, and therefore the seasonal ocean mass signal is in phase with total sea level with an amplitude of about 7 mm (Chambers et al., 2004). Because most of the ocean is in the Southern Hemisphere, the seasonal maximum in the steric component occurs in the late Southern Hemisphere summer, when heat storage in the majority of the ocean peaks (Leuliette and Willis, 2011). Because globally averaged sea level variations due to heat content changes largely cancel out between the Northern and Southern Hemispheres, the size of the steric signal, globally averaged, is only 4 mm. Globally averaged sea level has risen at 3.2 mm/yr for the past two decades (Church et al., 2011), of which about a third comes from thermal expansion. The remainder is due to fluxes of freshwater from the continents, which have increased as the melting of continental glaciers and ice sheets responds to higher temperatures. Multi-decadal fluctuations in equatorial and mid-latitude winds (Merrifield et al., 2012; Moon et al., 2013) cause regional patterns in sea-level trends which are reflected in the El Niño/Southern Oscillation (ENSO) and the Pacific decadal oscillation (PDO) indices in the Pacific (Merrifield et al., 2012; Zhang and Church, 2012) and northern Australia (White et al., 2014). Interannual changes in global mean sea level relative to the observed trend are largely linked to exchanges of water with the continents due to changes in precipitation patterns associated largely with the ENSO; this includes a drop of 5 mm during 2010-11 and rapid rebound in 2012-13 (Boening et al., 2012; Fasullo et al., 2013).", "The polar ice sheets of Greenland and Antarctica are the largest reservoirs of freshwater on the planet, holding 7 m and 58 m of the sea-level equivalent, respectively (Vaughan et al., 2013). The net growth or shrinkage of such an ice sheet is a balance between the net accumulation of snow at the surface, the loss from meltwater runoff, and the calving of icebergs and submarine melting at tidewater margins, collectively known as marine ice loss. There is some debate about the relative importance of these in the case of Greenland. Van den Broeke et al. (2009), show the volume transport to the ocean is almost evenly split between runoff of surface meltwater and marine ice loss. In a more recent work, Box and Colgan (2013) estimate marine ice loss at about twice the volume of meltwater (see Figure 5 in that article), with both marine ice loss and particularly runoff increasing rapidly since the late 1990s. According to the Arctic Monitoring and Assessment Programme (AMAP, 2011), the annual mass of freshwater being added at the surface of the Greenland Ice Sheet (the surface mass balance) has decreased since 1990. Model reconstructions suggest a 40% decrease from 350 Gt/y (1970 - 2000) to 200 Gt/y in 2007. Accelerating ice discharge from outlet glaciers since 1995 - 2002 is widespread and has gradually moved further northward along the west coast of Greenland with global warming. According to AMAP (2011), the ice discharge has increased from the pre-1990 value of 300 Gt/y to 400 Gt/y in 2005. Antarctica’s climate is much colder, hence surface meltwater contributions are negligible and mass loss is dominated by submarine melting and ice flow across the grounding line where this ice meets the ocean floor (Rignot and Thomas, 2002). Freshwater fluxes from ice sheets differ from continental river runoff in two important respects. First, large fractions of both Antarctic ice sheets are grounded well below sea level in deep fjords or continental shelf embayments; therefore freshwater is injected not at the surface of the ocean but at several hundred meters water depth. This deep injection of freshwater enhances ocean stratification which, in turn, plays a role in ecosystem structure. Second, unlike rivers, which act as a point source for freshwater entering the ocean, icebergs calved at the grounding line constitute a distributed source of freshwater as they drift and melt in adjacent ocean basins (Bigg et al., 1997; Enderlin and Hamilton, 2014). Sea ice is one of the smallest reservoirs of freshwater by volume, but it exhibits enormous seasonal variability in spatial extent as it waxes and wanes over the polar oceans. By acting as a rigid cap, sea ice modulates the fluxes of heat, moisture and momentum between the atmosphere and the ocean. Summertime melting of Arctic sea ice is an important source of freshwater flux into the North Atlantic, and episodes of enhanced sea ice export to warmer latitudes farther south give rise to rapid freshening episodes, such as the Great Salinity Anomaly of the late 1960s (Gelderloos et al., 2012). The spatial distributions of these freshwater fluxes drive important patterns in regional and global ocean circulation, which are discussed in Chapter 5." ]

[ "Petrobras has almost 30yr experience of developing oil and gas resources offshore Brazil. Most important is the company's success in developing technologies for deepwater production systems in the Campos Basin. These technological challenges and developments are described together with specific development programmes for the deepwater Albacora and Marlim oilfields." ]

[ "A1128" ]

[ "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "This paper provides an overview of the main efforts that are being endeavored by Petrobras in order to contribute for developing a Brazilian regulation for use and discharge of drilling fluids and cuttings from offshore oil and gas operation, based on operational safety, well integrity and environmental aspects. In early 2018, the Brazilian Environmental Agency launched a Normative Instruction (IN 01/2018) addressing some new conditions for use and discharge of fluids and cuttings from offshore drilling rigs. This regulation is based on the EPA rules, although some relevant points deviate from it, such as the prohibition for discharging drilling fluids and cuttings associated with hydrocarbon reservoir sections. Additionally, this regulation mentions a potential zero discharge by 2022. Due to the challenges for meeting these new requirements and some uncertainty about the real environmental benefits, Petrobras has been developing fundamental and applied studies, research development and protocols in this area. Petrobras settled an innovative governance model to deal with the new regulation, its consequences and interfaces. It works as a multidisciplinary committee coordinated by an executive manager. It involves a law support for environmental issues and four work fronts, such as (1) linking between internal and external organization (2) guarantee of providing the required infrastructure (3) economical and operational impacts (4) technologies (research, development, studies and protocols) dedicated for related matters. Concerning the forth front, seven important initiatives were initially addressed and cover topics such as operational safety, well integrity - including offshore wells dedicated to cuttings disposal, laboratory protocols and environmental issues. Some relevant studies are those concerning LCA (life cycle analysis), options for avoiding landfill as final cutting disposal onshore and the quantification of oil compounds in drilling fluids and cuttings from the pay zone well section. The lack of knowledge about the whole impact for onshore destination as drilling waste management strategy, the improvements that still have to be established in order to achieve better operational practices and the comprehension of the input of oil from drilling discharges are the main drivers of this paper. The results help to clarify cloudy topics and, consequently, contribute to create a new basis for building or revisiting some aspects of the present regulation.", "Petrobras relies on a fleet of over 300 vessels to support the exploration and production of oil in Brazilian territorial waters. The fleet consists of vessels of various sizes, from Tug Supply vessels to Remotely Operated Vehicle (ROV) Support vessels. These support vessels are designed to aid E&P rigs in wide range of activities, from simple refueling units to specialized units responsible for oil well stimulation and seismic studies, diving vessels, ROV vessels, oil spill response vessels and anchor handling tug vessels. The entire fleet provides services to Petrobras through chartering contracts between shipping companies and Petrobras' operational sectors. In 2012 these vessels were involved in 95 recorded accidents that did not fall under the category of occupational accidents, such as crashes, collisions, chemical spills (including oil and oil denvates), floods, fires and strandings. Aiming to reduce the occurrence of these events, Petrobras has established a group, formed from the operational sectors of the Health, Safety and the Environment (HSE), to implant the concepts of safety within those shipping companies providing support services to Petrobras. The application of these concepts on support vessels has required some adjustment, primarily in the classification of accidents.", "A panoramic view of Petrobras activity offshore Brazil focusing on the Campos Basin's early and permanent production systems, the capability of Brazilian engineering and industry to overcome the challenge of producing oil and gas from the sea, as well as forecasting the performance of the Brazilian state oil company.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "PETROBRÁS’s exploration and production operations in Campos Basin, is the biggest offshore activity supported by helicopter in the Brazilizan coast. With the increment of the activities, the number of platform, rigs and drilling ships are increasing and it is necessary a great number of helicopters to accomodate all passengers. Quality and safety are the most important aspects of this mean of transportation and PETROBRÁS works hard to maintain them. To obtain the expected results PETROBRÁS has: ·Safety flight policy: ·Periodical meetings among PETROBRÁS and Flight Companies; ·Regular inspections in all aircrafts; ·Database containing all informations concerning flight safety; ·Daily analysis of each anomalous situation. This paper has the objective to show some data and information about offshore activity in Campos Basin and PETROBRÁS flight safety policy.", "Brazil's oil development continues its remarkable progress; latest figures show crude oil output averaged 160,000 bpd, strong 8% increase over 1967; largest producer became Miranga field, discovered only in 1965 (see Engineering Index 1967 p 1699), where 120 wells have been drilled, and average total output amounted to 39,000 bpd; extensive drilling program has contributed to proven reserves of Petrobras, calculated at end of 1967 at 800 million bbl and 24. 5 billion cu m or around 850 billion cu ft of gas; offshore development is considered most promising, as sedimentary section of about 6000 m thickness has been indicated by previous geophysical and seismic surveys on Continental Shelf.", "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan." ]

[ "Cultural services and other social benefits of marine and coastal ecosystems The aesthetic, cultural, religious and spiritual services from the ocean (cultural services) cover a wide range of practices. The services are essential to the maintenance and creation of social capital, education, cultural identity and traditions (human and social capital). Around the world, many beliefs and rituals are rich in references to the sea. Research on marine and coastal cultural ecosystem services is, however, still limited (Garcia Rodrigues and others, 2017; Blythe and others, 2020; Diaz and others, 2018). Some cultural practices form integral parts of the traditional use of the ocean (such as ways of building boats or harvesting shellfish, and stone fish traps found across the coast of South-East Asia, Australia and the Pacific Islands). The diversity and technological sophistication of such structures attest to indigenous traditional knowledge of the ocean and its resources (Jeffery, 2013; Rowland and Ulm, 2011) Traditional watercraft such as the Hawaiian voyaging canoe H?k?le`a provide an active platform for the restoration and maintenance of Pacific non-instrument navigation and cultural identity. Numerous other voyaging canoes have been constructed in the Pacific and, in many places, knowledge of traditional wayfinding has been preserved. Fautasi races in Samoa and dragon boat races in China merge history and cultural traditions with health, fitness and competition. People have long incorporated water-related activities as habitual or significant parts of their lives. Other non-consumptive ocean activities are swimming, diving, kayaking, surfing, sailing and wildlife viewing. Finally, for many indigenous communities, fishing and the sharing of fishes form essential parts of traditional foodways, which support sociocultural cohesion and identity as well as linked ceremonial and cultural practices (Loring and others, 2019; Leong and others, 2020). Other cultural activities represent ways of reacting to the ocean (such as dances to celebrate the ocean or religious practices to safeguard against danger on the ocean). Such practices can constitute an important part of the cultural heritage of a people. One example is the role of whale hunting for the indigenous peoples of the western seaboard of Canada and the United States of America, as discussed in the first World Ocean Assessment. In Washington State, United States, one tribe, the Makah, has been pursuing special authorization to resume some whale hunting since 2005. In November 2019, a hearing was held for the tribe’s request and, in February 2020, a revised environmental impact assessment was published. The Makah fear that, without the special authorization, that particular element of their culture would remain connected to the past without any present reinforcement (A National Oceanic and Atmospheric Administration, 2015; 2020)." ]

[ "B2305" ]

[ "Consumption and competition The recovery of several marine mammal populations is generating the potential for conflicts in some regions and opportunities in others. Marine mammals can learn to associate fishing activities with food availability, leading to the development of behaviours to depredate catches from fishing vessels (Tixier and others, 2019) and the creation of conflict with aquaculture operations (Guerra, 2019). After an increase in minke whale catches and a resumption of commercial fin whaling prior to the first Assessment, North Atlantic commercial catches of minke whales have decreased and stabilized, and the commercial catch of fin whales was suspended in 2019 and 2020 (small numbers have been taken since the first Assessment as part of regulated subsistence catches). Over the same period, catches of pinnipeds and other cetaceans in the northern hemisphere have remained relatively stable overall (North Atlantic Marine Mammal Commission (NAMMCO), 2019; International Whaling Commission (IWC), 2019). Catches of baleen whales in the western North Pacific have remained broadly stable since the first Assessment (IWC, 2019, catches taken under special permits) and catches in Antarctic waters were suspended in 2019 (IWC, 2019). Regulated subsistence hunting of marine mammals remains stable (NAMMCO, 2019; IWC, 2019). Two intergovernmental organizations continue to provide a forum for discussions on and the assessment and management of catches of marine mammals: IWC, established in 1946, and NAMMCO, established in 1992. By-caught marine mammals can complement fishery catches for human consumption. This practice can be further complemented by hunting or the use of stranded animals in some countries (Robards and Reeves, 2011). Marine mammals used in such a way has been termed “aquatic wild meat” or “marine bushmeat”, the latter as an analogy with terrestrial bushmeat used to support food security in deprived regions (Cosentino and Fisher, 2016; Clapham and Van Waerebeek, 2007). The catch and consumption of coastal species in lower latitudes are likely to have increased (Robards and Reeves, 2011), in particular in South-East Asia and West Africa (Porter and Lai, 2017; Liu and others, 2019; Mintzer and others, 2018; Van Waerebeek and others, 2017), where the sustainability of such practices is often unknown. As habitat change associated with climate change redistributes species and has a potential impact on population abundances (Moore and Reeves, 2018), communities relying on the harvesting of marine mammals for food are also likely to be affected, resulting in future food security challenges (Brinkman and others, 2016). Marine mammals remain culturally significant, with objects created from body parts and as part of the imagery of coastal traditions and cultures. This cultural heritage is key to community cohesion and identity and includes unique elements, such as cooperative fishing between people and dolphins in Brazil (Daura-Jorge and others, 2012).", "Integrated management of human activities affecting the ocean The assessment of what is happening to aesthetic, cultural, religious and spiritual values is also very difficult. In essentially every coastal or island culture, the indigenous peoples have spiritual links to the sea. They often also have links with species or places, or both, that have high iconic values. The spiritual significance of those marine species and places may be part of their self-identification and reflects their beliefs about the origins of their culture. That is particularly true of island cultures, which are often intimately bound to the sea. Expressions of loss of, or threats to, such cultures and identities are readily found, but the marine component is not easily separated. Even populations that are economically fully developed with largely urbanized lifestyles still look to the ocean for spiritual and cultural benefits that have proven hard to value monetarily. In the 1990s, it became clear that the effects of fisheries on other biotas made an ecosystem approach to fishery management necessary, taking into account how a fishery might directly kill other species through by-catches, alter habitats and change relationships in the food web. Since then, the increasing use of the ocean has shown how fisheries managers need to work with other sectors to manage their effects on each other and, collectively, on the ocean that they share.", "Sambaquis are archaeological shell mounds and middens formed by pre-Columbian populations inhabiting the Atlantic Forest coast of Brazil between the Middle and Late Holocene. Beyond their recognized cultural values, sambaquis are valuable biological archives for tracking changes in past biodiversity and informing modern conservation studies and management. In this contribution we reviewed the published record of faunal remains from archaeological sites located in Babitonga Bay, in the state of Santa Catarina, southern Brazil. Through a literature review covering 110 sites, we assembled a comprehensive survey of terrestrial and marine taxa exploited by human groups in this area between ca. 5500 and 370 years ago. A total of 244 species were recorded, of which 14 are currently endangered and 12 are no longer present in Babitonga Bay. This zooarchaeological synthesis provides snapshots of past biodiversity, adding a novel contribution to current debates around the conservation biology of one of the world's most threatened tropical biomes.", "There are a number of threats to human health arising from the marine environment that have now been identified: Increase in the spread of pathogens related to climate warming (e.g., Vibrio). Also, there is some evidence related to an increase in some harmful algal bloom species related to climate warming is some regions (Hinder and others, 2012; Vezzulli and others, 2016); Recently, non-indigenous species, sometimes called invasive alien species, have started to be considered as one of the major threats to global marine ecosystems through impacts on the ecosystems’ structure, function and services (Galil, 2018). A small number of poisonous or venomous marine non-indigenous species represent potential threats to human health. Intensification of anthropogenic activities, coupled with rapidly increasing coastal urbanization, drive complex and fundamental changes in coastal waters, including increases in alien species. Some of the alien venomous and poisonous species have attracted the attention of scientists, managers, the media and the public for their conspicuous human health impacts. In the Mediterranean alone, 10 non-indigenous species are considered human health hazards, running the gamut from nuisance to lethal (Galil, 2018). Human health hazards of non-indigenous species are expected to worsen as a result of climate change. The poleward influx of warm water biota enables them to spread to regions as yet uncolonized; A further, recently identified health threat is the potential role of plastic marine litter as a vector for opportunistic human pathogens and antibiotic-resistant microorganisms (Barboza and others, 2018; Harrison and others, 2018; Imran and others, 2019). Various pathogenic bacteria bind, in particular and strongly, to plastic litter (for example, Vibrio cholerae and some strains of Escherichia coli). Such human pathogens can colonize plastic surfaces in stable biofilms. The scientific and medical understanding of that health threat of plastic pollution is inadequate but the threat is dealt with as a further aspect of the problem of marine litter discussed in chapter 12. A severe problem could arise in areas that are highly polluted as a result of natural disasters, climate crises or occurring epidemics, or in conflict zones (Vethaak and Leslie, 2016; Keswani and others, 2016; Galloway and others, 2017; Leonard and others, 2018a, 2018b; Moore and others, 2014).", "Cultural services and other social benefits of marine and coastal ecosystems Heritage is also part of the cultural services provided by the ocean, with significant, though often unquantified, social and economic benefits (Firth, 2015). The iconic nature of underwater cultural heritage, such as historic shipwrecks, captures archaeological and historical information, revealing unique aspects of past human seafaring and behaviour, to be shared through museums, documentaries and public research. Shipwrecks can also yield valuable information about the sociocultural, historical, economic and political contexts on various scales of reference (local, regional or global) between the date of the vessel’s construction (e.g., hull design, rig, materials used or purpose) and the reason for its eventual demise in the sea (e.g., warfare, piracy, privateering, intentional abandonment or natural weather events) (Gould, 1983). The remains of prehistoric and historic landscapes submerged by changing sea levels and the continuing destruction of important coastal sites by exposure and erosion are important reminders of climate change in the human past and of the impact of the climate crisis today (Harkin and others, 2020). Wreck site tourism plays a role in the recreational diving industry. Services to memorialize vessel losses, such as wreath-laying ceremonies at submerged warship gravesites, are an expression of the deep connection to sacrifice at sea. The diversity of cultural services arising from shipwrecks and other historic structures in the sea is complemented by the role that underwater cultural heritage can play as artificial reef, providing habitats that are important for nature conservation, sea angling and commercial fishing, for example (Firth, 2018). Finally, there is a sense of place engendered in onlookers by the ocean. The sense of openness and exposure to the elements can be very important to those who live by the sea or visit it as tourists. As discussed in chapter 8B on human health and the ocean, there is growing evidence that the sense of openness engendered by the ocean can improve human health. The ocean has also been an important source of inspiration to artists, composers and writers, often reflecting economically important aspects of society. Some studies reveal the deep emotional attachment of people to the marine environment (e.g., the Black Sea in Fletcher and others (2014) and the North Sea in Gee and Burkhard (2010)), as well as the importance of maintaining that relationship to preserve both nature and culture (Fletcher and others, 2014). However, despite progress to date, marine research and management have until recently largely neglected the critically important role of the sense of place, including how it influences the success and efficacy of management interventions (Van Putten and others, 2018; Hernandez and others, 2007). Opportunities for income generation and employment opportunities, for education and recreation and for scientific and artistic information and inspiration are also part of the wider range of social benefits that marine and coastal ecosystems provide and upon which the well-being of populations, regardless of their distance from the shore, hinges directly and indirectly.", "Enjoyment of marine wildlife Diving Snorkelling and scuba diving continue to be a significant element in marine tourism, focused on enabling tourists to enjoy underwater wildlife. The substantial growth (about 25 per cent) in the levels of the activity recorded in the period from 2000 to 2013 and reported in the first Assessment has now slowed down but still continues. Based on the statistics of the Professional Association of Diving Instructors, between 2013 and 2019, there was about 6 per cent growth in the number of establishments offering diving training (about 6,600 in 2019), about 1 per cent growth in the number of individual trainers (about 137,000 in 2019) and about an 11 per cent increase in the number of people trained annually (about 1 million in 2019) (Professional Association of Diving Instructors (PADI), 2019). The main interest in diving lies in areas endowed with coral reefs – the corals and other reef biota are spectacular and attract large numbers of tourists who want to see them. In some areas, as recorded in the first Assessment, studies suggest that it is possible to manage coral reef tourism (e.g., by limiting the number of divers in an area, specifying divers’ behaviour and generally increasing divers’ awareness of the problems) compatibly with sustaining the condition and health of the reef. In other areas, however, studies continue to suggest that the interaction of divers with coral is damaging the reefs. A recent study of the coral reefs around the island of Bonaire in the Caribbean part of the Netherlands showed that diving is at levels probably at least twice those considered to be the upper limit beyond which damage is likely to occur (see Hawkins and Roberts, 1997), and that damage, albeit largely unintentional, is occurring but could be controlled by better management measures (Jadot and others, 2016). As part of the decommissioning of offshore installations, significant numbers of disused installations are being used to create artificial reefs. In the Gulf of Mexico alone, 532 installations had, by 2018, been used as artificial reefs (Bureau of Safety and Environmental Enforcement of the United States (BSEE), 2020). In 2016, it was estimated that some 600 offshore installations would be decommissioned between 2017 and 2021. Not all of them were intended as places for divers to explore, but a substantial proportion are being used in that way (Van Elden and others, 2019). A new area of interest for scuba diving is emerging in the form of diving over muddy substrates, known as “muck diving”, which focuses on finding rare, cryptic species that are seldom seen on coral reefs. A recent study investigated the value of “muck diving”, its participant and employee demographics and potential threats to the industry. Results indicate that “muck diving” tourism is worth more than $150 million annually in Indonesia and the Philippines combined. It employs over 2,200 people and attracts more than 100,000 divers per year (De Brauwer and others, 2017).", "Length-weight and length-length relationships were determined for nine fish species of Rocas Atoll, Fernando de Noronha and Trindade Island. Samples were conducted in 2014 (Rocas) and 2015 (Noronha and Trindade) in tidepools using anaesthetic clove oil and hand nets to collect fish fauna. Four species (Stegastes rocasensis, Scartella itajobi, Starksia multilepis and Bathygobius brasiliensis) are endemic from the Noronha-Rocas ridge, two are endemic from the Trindade-Martin Vaz insular complex (Scartella poiti and Malacoctenus brunoi), and three species have a widespread distribution. All relationships are novel for science.", "On the 18th January 2000 a broken pipeline owned and operated by the oil company Petrobras spilt some 1300 tonne of bunker fuel into Guanabara Bay, Rio de Janeiro. The wildlife response was divided amongst 2 operational strategies and included - avion fauna and cetaceans. This paper deals with the cetacean response only. Cetaceans are generally not considered as an important feature of an oil spill response. Contingency planning for cetaceans in oil spills is now becoming an important element for preparedness for some countries. The cetacean response in Guanabara Bay specifically targeted a pod of about 70 members of the species Sotalia fluviatilis, a small dolphin that inhabits the bay. The response included the development of a plan that included a response system, a monitoring program and action plans. The response system detailed the mechanism for the plan to work and adopted the incident control management system. The monitoring program related to the study of any short term or long term deleterious effects resulting from the spill and consisted of basic spatial, temporal and behavioural studies. Action plans were developed specific to the character of Guanabara Bay and included the rescue and rehabilitation strategies necessary to respond to oil affected cetaceans. A training program, was then developed and implemented to personnel who were to enact the cetacean response.", "Many countries emphasize environmental sustainability and social responsibility. In addition to laws, regulations and voluntary codes aimed at ensuring environmental integrity, some of the means of achieving this goal include innovative, less polluting techniques proposed by the ecosystem approach to aquaculture, which emphasizes management for sustainability (FAO, 2010) and provides a planning and management framework to effectively integrate aquaculture into local planning (Brugère and others, 2018). Although efforts related to intensification have resulted in decreased use of land and fresh water per unit of fish produced (FAO, 2017a), they have also led to an increase in the use of energy and feed, and in pollution, per unit of farmed fish (Hall and others, 2011). Although aquaculture has been accused of having negative environmental and social impacts (Bushmann and Fortt, 2005; Isla Molleda and others, 2016) and suffers from a biased perception on the part of the public, it has, from an ecological efficiency and environmental impact point of view, clear benefits over other forms of animal food production for human consumption. Life-cycle assessment is useful to determine environmental impacts and ensure environmentally sustainable development (Bohnes and Laurent, 2019). Farmed finfish is similar in feed conversion efficiency to poultry and much more efficient than beef. Recent estimates indicate that demand for feed crops and land for aquaculture will be less than for alternative food production systems, even if over one third of protein production comes from aquaculture, by 2050 (Froehlich and others, 2018). Filter-feeding carps and molluscs are even more efficient producers of animal protein, as they require no human-managed feeds and can improve water quality. Because aquaculture is relatively new, it offers great scope for innovation to increase resource efficiency (Waite and others, 2014). Where resources are stretched, the relative benefits of policies that promote aquaculture over other forms of livestock production should be considered. In general, the environmental performance of aquaculture has improved significantly over the past decade. If aquaculture production doubles by 2030, the sector must improve its productivity and environmental performance for growth to be sustainable (Waite and others, 2014). In order to achieve “sustainable intensification”, aquaculture must: (a) advance socioeconomic development; (b) provide safe, affordable and nutritious food; (c) increase production of fish relative to the amount of land, water, feed and energy used; and (d) minimize environmental impacts, fish diseases and escapes (FAO, 2017a).", "Globally, about 2,000 marine non-indigenous species (NIS) have been introduced to new locations through human-mediated movements. A few of those have economic value, but most have had negative ecological, socioeconomic or human health impacts. With increased trade and climate change, biological invasions are likely to increase. NIS can pose significant biosecurity and biodiversity hazards. Large-scale NIS surveys with broad taxonomic coverage are lacking, as are studies documenting the range of potential impacts in recipient environments. Major invasion vectors (i.e., ballast water, biofouling, aquaculture, trade in live specimens, canals and plastic or other debris) lack characterization and understanding at the global, and often regional, levels and, other than for the management of ballast water and sediments, there is an absence of regulation. Given the multi-vector nature of both the introduction and the spread of NIS, there is a need for comprehensive and integrated legal instruments with robust enforcement to mitigate the movement of species and holistic monitoring programmes that can detect them. Better tools are urgently required to assess the potential risks of NIS under changing environmental conditions, to identify the native species and ecosystems most at risk and to determine the best way to respond (i.e., through early detection and rapid response). That is especially true for species with no previously documented invasion history." ]

[ "Marine genetic resources continue to be the focus of an expanding range of commercial and non-commercial applications. Rapidly decreasing sequencing and gene synthesis costs and swift advances in the metabolic engineering and synthetic biology fields within the biotechnology sector have rendered scientists less reliant on physical samples and increasingly dependent on the exponentially expanding public databases of genetic sequence data. Sponges and algae continue to attract substantial interest for the bioactive properties of their natural compounds. Within the context of the Sustainable Development Goals, capacity-building issues persist, with entities in a handful of countries conducting the majority of research and development associated with marine genetic resources. International processes and agreements with relevance to marine genetic resources include the Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from Their Utilization to the Convention on Biological Diversity, and the intergovernmental conference on an international legally binding instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological diversity of areas beyond national jurisdiction." ]

[ "B2514" ]

[ "Patterns of biodiversity Perhaps the most common large-scale biodiversity pattern on the planet is the “latitudinal gradient”, typically expressed as a decline in the variety of species from the equator to the poles. Adherence to that pattern varies among marine taxa. Although coastal species generally peak in abundance near the equator and decline towards the poles, seals show the opposite pattern. Furthermore, strong longitudinal gradients (east-west) complicate patterns, with hotspots of biodiversity across multiple species groups in the coral triangle of the Indo-Pacific, in the Caribbean and elsewhere. Oceanic organisms, such as whales, differ in pattern entirely, with species numbers consistently peaking at mid-latitudes between the equator and the poles. This pattern defies the common equator-pole gradient, suggesting that different factors are at play. Various processes may also control the difference in species richness between the oceanic and coastal environments (for example, in terms of dispersal, mobility or habitat structure), but general patterns appear to be reasonably consistent within each group. However, across all groups studied, ocean temperature is consistently related to species diversity, making the effects of climate change likely to be felt as a restructuring factor of marine community diversity.", "Technological advancesAreas beyond national jurisdiction have become increasingly accessible owing to technological advancements that facilitate the exploration and exploitation of deep-sea resources, including biodiversity, minerals, oil and gas. Ensuring the sustainable development of those regions will require international cooperation in order to manage them effectively. Negotiations on a legally binding international instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of the marine biological diversity of areas beyond national jurisdiction are focused on ensuring the sustainable development and conservation of those areas (see also chap. 28). The International Seabed Authority has a dual mandate of promoting the development of deep-sea minerals, while ensuring that such development is not harmful to the environment. In areas beyond national jurisdiction, appropriate planning will be required to minimize impacts on the marine environment. The uptake of technological advances for accessing and utilizing marine resources, sustainably developing marine industries and effectively managing those uses is not globally even. Many regions, in particular those where the least developed countries are located, still lack access to technologies that can assist with the sustainable use of marine resources.Changing governance structures and geopolitical instabilityThere has been an increase in nationalism and protectionism over the past decade, contributing to changing trade agreements and, more recently, the implementation of tariffs on goods between specific countries. The Democracy Index fell from 5.55 in 2014 to 5.44 in 2019, largely driven by the regional deterioration of conditions in Latin America and sub-Saharan Africa. When indices for individual countries are calculated, stark regional differences are evident. Countries in Scandinavia, the far north of North America and the South-West Pacific had the highest indices, while those in sub-Saharan Africa, the Middle East and parts of Asia had the lowest. Those differences have an impact on the implementation of global and regional treaties and agreements, thereby affecting economic growth, the transfer of technologies and the implementation of frameworks for managing ocean use, including the development of national ocean-related policies. That, therefore, affects the sustainability of human activities and the protection of marine ecosystems in those areas.Climate changeClimate change effects are not uniform across the global ocean. A number of regions are warming at higher rates than the global average and are identified as marine hotspots (Hobday and Pecl, 2014). A number of those hotspots are located where human dependence on marine resources is greatest, such as South-East Asia and Western Africa, with substantive implications for food security compared with other regions. The Arctic is another region where the ocean is warming at 2 to 3 times above the global average (IPCC, 2018). Similarly, decreases in the pH and carbonate ion concentrations of the ocean, associated with ocean acidification, and other effects of climate change, such as deoxygenation, stratification and sea level rise, are regionally variable, with highly variable impacts on the marine environment. Regional differences in such changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9.", "Increasing pressures on marine environments from multiple sources are resulting in biodiversity loss, habitat damage and fragmentation and disease. Effective implementation of ecosystembased management requires an appreciation of how, and to what extent, human activities and natural events interact and affect different ecosystem components and their functioning. It also requires the identification of solutions to prevent and mitigate the pressures being caused by those interactions. Over the past two decades, many frameworks for assessing the interactions, known as cumulative effects, have been developed. They have used differing approaches and terminologies and have been applied at differing levels. Although approaches vary, cumulative effects assessments (CEAs) conducted to date have mostly involved three main steps: (a) collation of information on the intensity and footprint of activities that may be affecting marine ecosystems; (b) identification of the responses of ecosystem components; and (c) identification of management measures that could be applied in response. Despite their increase in use, assessments focused on particular regions, areas or values that follow the same general steps outlined above are largely lacking from areas outside Europe and North America. The geographical bias in the implementation of CEAs highlights clear knowledge and capacity gaps and the need for the development of approaches that: (a) can be implemented in regions where data are sparse; (b) are easily implementable; and (c) produce outputs that can be readily understood and are translatable to decision-making processes, in particular in developing countries.", "The rapid growth of intensive aquaculture, in some cases not well planned, has caused concern about environmental impact, human health and social issues. Although the lion’s share of production originates in Asia, opposition to aquaculture development is strongest in some developed countries (Froehlich and others, 2017), where aquaculture is still a relatively new industry competing with well-established activities. The world’s knowledge regarding the impact of climate change on aquaculture needs to be improved. Further research and investigation is necessary to improve seeds, feeds and health management. The increasing dependence of developed countries on farmed seafood imports from developing countries and insecurity regarding product environmental, social and safety credentials have sparked considerable public debate. Scientific uncertainties and conflicting information on the issues relating to seafood consumption have further confused the public. The establishment and application of third-party certification systems, covering the environmental, social and food safety concerns related to seafood, have begun to ease this situation. More research is needed to communicate the nutritional and health benefits of increased consumption of seafood. Determination of the nutritional profiles of cultured fishes and wild-caught products and quantification of the health benefits of socioeconomic improvements through aquaculture need further attention. With a growing world population, annual supply from the aquaculture sector must surpass supply from capture fisheries and reach 62 per cent in 2030 in order to maintain current consumption levels. This presents tremendous challenges to the sector, to policymakers and to the aquaculture community at large. Improving perceptions will be instrumental in achieving this goal (Vannuccini and others, 2018). Better information and exchange thereof would help in allaying concerns, dispelling myths and resolving ambiguities. To improve public awareness of aquaculture, the industry needs a more open, broader dialogue that will increase transparency. To communicate the benefits of aquaculture more effectively, it must collaborate more with stakeholder groups viewed as credible by the public. While significant social and environmental issues are still to be addressed, it is important to put aquaculture in a wider perspective by comparing its costs and benefits with those of other animal production systems and with its potential contribution to sustainable food security, given forecasted demographic pressures. However, a holistic view, with a balanced evaluation of the risks and benefits of aquaculture, has been lacking, thus impeding the development of policies that reflect production realities (Bacher, 2015).", "Persistent organic pollutants Persistent organic pollutants (POPs) continue to be a global issue, persisting at concentrations likely to cause biological effects. POPs are detected in remote locations far from their source of production, which includes the deepest parts of the ocean and the polar regions. The number of POPs continues to increase and thus the mixtures to which biota are exposed become more complex, making the determination of the likelihood of individual or population effects ever more challenging. Metals There is a critical need to develop and expand coastal metal time series globally. Trends in metal concentrations vary regionally, although most show levelling of dissolved metals and a slight increase in higher trophic organisms. Radioactivity There have been no significant nuclear accidents affecting the oceans since the first World Ocean Assessment (United Nations, 2017c). The generation of electricity from nuclear power plants continues to increase, with an increase of about 5 per cent globally between 2013 and 2018. Improved technology may be reducing discharges of many radionuclides, but those of tritium are probably increasing in line with electricity generation. Tritium is, however, only weakly radioactive. Published information on recent discharges of radioactive substances to the ocean from nuclear power plants and nuclear", "Brazilian carbonate reservoirs contain huge oil-in-place volumes and are likely to have an important economic impact in global oil industry. Such carbonate reservoirs, both Albian and Aptian, are located offshore in deep water, which has an important role in development costs. In siliciclastic plays it is standard practice to use time-lapse (4D) seismic to locate wells in unswept areas, maximizing the recovery factor. However, in carbonate plays, time-lapse seismic monitoring remains challenging, with few cases of success published around the world. Carbonates differ from siliciclastic rocks in many aspects. With a varied chemical composition and complex pore connectivity, carbonates bring on a large diversity of facies, each one showing a specific seismic response. Moreover, the usually high incompressibility of the carbonate matrix reduces sensitivity to pressure and saturation changes, which are the main effects expected on a hydrocarbon field undergoing production. Considering both the economic relevance and the difficulties of using time-lapse seismic to monitor carbonate reservoirs, Petrobras created a strategic program to face this challenge, a time-lapse seismic (S4D) study of an Albian carbonate reservoir located in the Campos Basin offshore Brazil. Three legacy data were available: streamer-1987, streamer-2002, and ocean-bottom cable-2010. Extensive feasibility studies are performed as well as a meticulous prestack 4D simultaneous inversion based on the seismic data, preliminary cross-equalized to partially overcome the initial low repeatability. A multidisciplinary interpretation conducted by a team of geophysicists, geologists, and reservoir engineers finally lead to results overcoming expectations. Saturation and pressure changes are detected using P-and S-impedance attributes, consistent with production data. Results are opening perspectives for further monitoring other carbonate reservoirs, especially with new presalt Brazilian discoveries in the Campos and Santos Basins, which might have a huge economic impact.", "The analysis of hydrocarbons in terms of individual compounds is relevant to understand the origin and source of these substances, as well as its distribution in environmental compartments, including sediments and biota. Hydrocarbons concentrations were determined in sediments and in whole-body soft tissues of the tropical clam Anomalocardia flexuosa in sediment toxicity testing using samples of Mucuripe bay (Ceará State, NE Brazil) collected in 2011 during dredging events [1]. Data of target compounds included aliphatic (AHs) and aromatic hydrocarbons (PAHs), and linear alkylbenzenes (LABs). AHs compounds were determined on gas chromatography with flame ionization detector (GC-FID), while PAHs and LABs were determined on gas chromatography coupled to a mass spectrometer (GC/MS) in a selected ion mode (SIM). The potential of this dataset is baseline information on hydrocarbons contamination in sediments from a semi-arid region and the bioaccumulation of organic contaminants in marine organisms that can be used as models in ecotoxicological studies.", "Patterns of biodiversity Biodiversity and economic activity Sometimes, because of the special physical features that contribute to high biodiversity, and sometimes because of the concentration of biodiversity itself, many societies and industries are most active in areas that are also biodiversity hotspots. As on land, humanity has found the greatest social and economic benefits in the places in the ocean that are highly productive and structurally complex. For example, 22 of the 32 largest cities in the world are located on estuaries; mangroves and coral reefs support smallscale (artisanal) fisheries in developing countries. Biodiversity hotspots tend to attract human uses and become socioeconomic hotspots. Hence biodiversity-rich areas have a disproportionately high representation of ports and coastal infrastructure, other intensive coastal land uses, fishing activities and aquaculture. This is one of the major challenges to the sustainable use of marine biodiversity. Some marine features, such as seamounts, often found in areas beyond national jurisdiction, have high levels of biodiversity, frequently characterized by the presence of many species not found elsewhere. Significant numbers of the species mature late, and therefore reproduce slowly. High levels of fishing have rapidly undermined the biodiversity of many such features, and risk continuing to do so in the absence of careful management. New forms of economic activity in the open ocean, such as seabed mining, and the expansion of existing forms of activity, such as hydrocarbon extraction, have the potential to have major impacts on its biodiversity, which is to date poorly known. Without careful management of those activities, there is a risk that the biodiversity of areas affected could be destroyed before it is properly understood.", "Globally, about 2,000 marine non-indigenous species (NIS) have been introduced to new locations through human-mediated movements. A few of those have economic value, but most have had negative ecological, socioeconomic or human health impacts. With increased trade and climate change, biological invasions are likely to increase. NIS can pose significant biosecurity and biodiversity hazards. Large-scale NIS surveys with broad taxonomic coverage are lacking, as are studies documenting the range of potential impacts in recipient environments. Major invasion vectors (i.e., ballast water, biofouling, aquaculture, trade in live specimens, canals and plastic or other debris) lack characterization and understanding at the global, and often regional, levels and, other than for the management of ballast water and sediments, there is an absence of regulation. Given the multi-vector nature of both the introduction and the spread of NIS, there is a need for comprehensive and integrated legal instruments with robust enforcement to mitigate the movement of species and holistic monitoring programmes that can detect them. Better tools are urgently required to assess the potential risks of NIS under changing environmental conditions, to identify the native species and ecosystems most at risk and to determine the best way to respond (i.e., through early detection and rapid response). That is especially true for species with no previously documented invasion history.", "Humanity has always drawn sustenance from the ocean through fishing, harvesting and trade. Today 44 per cent of the world's population lives on or within 150 kilometres from the coast (United Nations Atlas of Oceans). However this fundamental connection between nature and people has only very recently been incorporated into trans-disciplinary thinking on how we manage and account for the human benefits we get from nature. Today, when a product taken from an ecosystem1 , for example, fibres, timber or fish, enters the economic cycle (i.e., a part of the human system), it receives a monetary value that accounts at least for the costs associated with its extraction and mobilization. If that natural product is the result of cultivation, as in the case of agriculture, forestry and aquaculture, the monetary value also includes the production costs. However, the extraction of natural products and other human benefits from ecosystems has implicit costs of production and other ancillary costs associated with preserving the integrity of the natural production system itself. Traditionally these benefits and costs have been hidden within the “natural system,” and are not accounted for financially; such hidden costs and benefits are considered “externalities” by neoclassical economists. While the neoclassical economic toolbox includes non-market valuation approaches, an ecosystem services approach emphasizes that ‘price’ is not equal to “value” and highlights human well-being, as a normative goal. The emergence and evolution of the ecosystem services concept offers an explicit attempt to better capture and reflect these hidden or unaccounted benefits and associated costs when the natural “production” system is negatively affected by human activities. The ecosystem services approach has proven to be very useful in the management of multi-sector processes and already informs many management and regulatory processes around the world (e.g. United Kingdom National Ecosystem Assessment, 2011)." ]

[ "The increase of oil exploration and production in a given ocean area may put new requirements on the design of mooring systems for the floating units. It is necessary to simplify the underwater layout through the reduction of the lines horizontal span and to allow smaller distance between the production units. In this context the utilisation of taut-leg mooring system seems to be very attractive. The main object of the this paper is to present a comparison between taut-leg and conventional mooring systems in terms of total unit offset and horizontal span. It is presented, initially, the main lines of a synthesis procedure that the authors have developed to select the best configuration for the mooring system, in order to accelerate the search of the solution. In order to make the comparison between the taut-leg and the conventional mooring systems, the synthesis procedure is applied to PETROBRAS semisubmersible platforms SS-20 operating at a water depth varying from 600 to 1000 meters. The results obtained in the analysis show the great advantages of the taut-leg configuration with respect to the total offset and horizontal span." ]

[ "A1032" ]

[ "The continuous discoveries of oil fields in deep and ultra-deep Brazilian waters and the excessive wide fluctuations on the rig rates were the reasons for PETROBRAS to enhance the capability of one of its owned semi-submersible drilling rig. This paper aims to present an overview of the main technical aspects of the design and yardwork for the upgrading of semi-submersible drilling rig P-10 unit capacity from 500 m to 1200 m water depth. The upcoming ultra-deep waters scenario in Brazilian offshore, that includes East Albacora, Roncador Phase 2, South Marlim Phase 2 and East Marlin oil fields, demands a further step. Then, preliminary studies were carried out to probe the water depth limit, without hull upgrading, just applying the technologies, that it had in mind since the beginning of this upgrading project, but still needed further tests to bridge the gap until safety utilization. Now, the deep water technologies of taut-leg mooring with polyester rope and risers for slender wells may already be considered applicable. A new pile anchor installation concept was developed, field tested and certified. Altogether, they allow one to predict the feasibility of a new upgrading for P-10 with very limited budget, keeping alive the utilization of this anchor moored drilling unit at waters possibly up to 2000 meters, a new scenario it was initially thought that could be efficiently reached only by means of dyanamic positioning units.", "The project and the construction of the secondary Mooring Berth intended for petroleum by-products which forms part of the system of the Petrobras Almirante Tamandate Maritime Terminal (Tegua) in Guanabara Bay, and permits 18 simultaneous operations of two 35,000 dwt tankers. The total length of the mooring berth is 314. 50 m, and it has a depth of water of 13. 00 m below low water level. The central platform has eight '%'Chick-San'%' devices, with corresponding suspension arms to maneuvre the ship connection hoses.", "The collaboration between Petrobras and Westinghouse has resulted in the development of a conceptual design for a subsea multiphase-flow pumping system. The system, called SBMS-500, features 500 m3/hr total flow rate, up to 6 Mpa of pressure increase, up to 95% gas-void fraction (GVF) at the suction, and about 1.2 MW of power on the shaft. Concurrently with the system's development, Petrobras created a new program named Procap-2000 aimed at technological innovation for deepwater exploitation systems. Procap has led to the development of the subsea multiphase flow pumping system (SMFPS) based on the SBMS-500 prototype. The SMFPS features several subsystems that incorporate electrical motors and ancillary equipment.", "New equipment developed for employing underbalanced drilling techniques on a floating drilling rig were presented. Field trials of the equipment are being conducted on a semi-submersible vessel in the Albacora Field of the Campos Basin in offshore Brazil. The test is being conducted in a partially depleted formation with a pore pressure of ~ 7 lb/gal. A nitrogen generation system capable of delivering 1500 scf/min of 4000 psi nitrogen was used to provide the gas phase during the lightweight drilling fluid fields on Petrobras-17. The nitrogen will be injected into the standpipe manifold at ~ 3000 psi. A discussion covers background information on lightweight fluids; limitations of deepwater drilling with lightweight fluids; essential equipment required for deepwater drilling with lightweight fluids; and future applications.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted.", "This paper describes the site installation of a turret moored Floating Production, Storage and Offloading System - FPSO - in 780 meters of water in Campos Basin, offshore Brazil. The FPSO, a 270,000 dwt converted tanker, is the first of a series of two ordered by Petrobras for development of the Marlim Field. An internal bow mounted Turret system, anchored to the seafloor by 8 chain-wire rope-chain combined mooring legs, is used to permanently moor the FPSO in the location while allowing the vessel to freely weathervane. Thirty-five flexible risers, laid in a free-hanging catenary configuration, provide the flow path between the FPSO and the various subsea equipment on the seafloor. This paper describes the installation equipment and procedures employed.", "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico.", "The Papa Terra oil field is located on the BC-20 Block in the Campos Basin - Brazil (110 kilometers away from Rio de Janeiro state coast) in a water depth of 1,200 meters. The field is operated by Petrobras having Chevron as non-operator partner. Papa Terra has a crude oil with an API index between 14 and 17 degrees. The field is among one of the most complex subsea developments ever executed in Brazil with its first oil performed in 2013 and the production subsea facilities installation completed in 2014. The proposed design for the subsea production system was the use of an Electrically Trace Heated Integrated Production Bundle (ETH-IPB), the 3rd generation of this field proven technology, which was successfully designed, manufactured and installed by Technip on previous West African projects. A total of 27 km of ETH-IPB riser and flowline as well as its own electrical and monitoring module have been designed, manufactured, installed and successfully commissioned for the Papa Terra project. The core of the ETH-IPB is a 6 ID flexible pipe dedicated to production fluid. Around the core, the following components are distributed into a bundle layer: Heat tracing cables designed to provide active heating of the production fluid during warm up or after a shut-down. A Distributed Temperature Sensor (DTS) fiber optic system, deployed offshore into a stainless steel tube loop in order to provide temperature monitoring along the length of the riser and flowline system. Spacers, designed to protect the electrical cables and fiber optic tubes from mechanical loadings during installation and manufacturing. The main aim of this paper is to describe the design of this production system, that was used for the first time in Brazil and which present a lot of innovations in several domains, due to overall length, thermal requirements, heating control and riser to flowline electrical connection on the seabed. Some results of the qualification program will be presented, in particular mechanical, bundle components, fatigue and thermal performance tests. Finally, results of the field performance tests and operational feedback by Petrobras will be presented and discussed.", "The P50 system is a Floating Production Storage and Offloading System under construction for future operation at Brazil's Campos Basin, in a water depth of approximately 1200 m. The system is based on a VLCC vessel, moored in DICAS (Differential Compliance Anchoring) system and presents a reasonably large riser porch on the portside for 77 lines. In this paper the dynamic behavior of the offshore system is evaluated using Dynasim, a time-domain simulation code for moored offshore systems, developed by the University of São Paulo and Petrobras. Simulations are compared with experimental results. Two kinds of tests were performed: \"Calibration\" tests were carried out in order to obtain static coefficients of the hull under isolated current and wind loads. \"Validation\" tests were conducted to evaluate the dynamic behavior under extreme environmental conditions combining current and wave excitation. First and second-order motions were measured as well as mooring line tensions for three different drafts of the ship. A generally good agreement was observed between numerical simulations and experimental results, reassuring the reliability of the numerical code.", "The paper will present different versions of barge concepts with surface trees from the smallest unit \"The Wellhead Barge - WHB®\" supporting only surface trees and completion rig, to the largest unit \"The Multifunction Barge - MFB®\", an FPSO with surface trees and drilling facilities. A spread moored barge is already used as a production unit on the NKOSSA field offshore Congo and a spread moored FPSO will be installed offshore Angola in 1350 m water depth on the GIRASSOL field in early 2001. Although none of these facilities has surface trees on board, their motion behavior is compatible with both drilling and surface trees. West African unique metocean conditions allow deepwater field operators to consider spread-moored barge-type floaters to support surface wellheads and perform drilling operations. In other deep offshore areas, such as Gulf of Mexico and Offshore Brazil, Tension Leg Platforms (TLP's) and deep draft vessels are presently the only floaters able to support surface trees. The paper will present results of computational work and their correlation with tank tests on the MFB®, and WHB® performed on 1/60 model including hull, mooring and risers under wave and current loadings. Emphasis will be placed on risers, drilling arrangement, and hydrodynamic behavior within the well bay. Economical advantage, which results from the use of the \"Surface Tree Barges\", will conclude the paper. Barges with surface trees take advantage of benign metocean conditions of Gulf of Guinea to offer a single vessel as drilling and production support for field development. Surface trees and drilling facility are integrated on a low cost, high carrying capacity floater able to support any kind of processing plant with or without crude storage." ]

[ "Marine parks constitute important areas for the conservation of marine life and the genetic heritage around the world. The creation of such marine parks must be accompanied by careful measures to guarantee the coexistence of natural biota and human activities in these systems. The State Marine Park of Laje de Santos (SMPLS) is so close to an industrial pole and urban area that its creation and maintenance is an example for humanity. However, no program has yet been installed for the monitoring of its biotic and abiotic water parameters. Thus, the objective of this study is to provide hydrological and hydrochemical parameters with emphasis on dissolved nutrients to establish a starting point for the monitoring of these waters. The presence of the South Atlantic Central Water (SACW) in the marine park during the spring and summer sampling periods was evidenced by the observation of low temperatures ( 7.00 µmol L-1), while the concentration of N-ammonium (maximum 9.86 µmol L-1) demonstrated a rapid regeneration of the organic matter, mainly in the euphotic zone. Analysis of the data from summer periods revealed an annual difference, showing January 2014 to be drier than January 2015, which influenced the availability of some nutrients and the standard distribution of hydrochemical parameters in this region. The results of the distribution of hydrochemical parameters in the marine park confirms the preserved conditions of the seawater around the Laje de Santos, demonstrated by the excellent water quality, concluding the need to implant monitoring actions based on these reference data to preserve this important reserve of marine life." ]

[ "A1921" ]

[ "The knowledge of metal behavior in the aquatic environment is important for understanding its effects in estuarine zones and mangrove areas. These important and precious ecosystems are affected by many different factors that may vary temporally and spatially. The present study investigated the spatial and temporal variation of physicochemical parameters (pH, dissolved oxygen, temperature, salinity, etc.) and metal concentrations (Zn, Fe, Ni, Cu) at three different locations along the Todos os Santos Bay, North East Brazil, by analyzing surface water, sediment and mangrove oysters (Cassostrea rhizophorae (Guildin, 1828)). Metal concentrations in surface waters and sediments differed between the three sampling times (March and August 2014; January 2015) and locations and were affected by fluctuating physicochemical parameters, which in this way also affected the metal bioconcentration in the oysters. The pH of the surface waters, for example, increased from the 1st to the 3rd sampling time while the concentrations of Zn and Fe decreased during the same period. The sediment concentrations of Zn and Fe were strongly correlated with organic matter content. These results suggests that seasonality as well as the different water and sediment properties along the bay directly affect metal concentration and bioavailability in the environment.", "The marine environment brings both benefits and risks to human health, especially for people who live near it(see figure below; Depledge and others, 2013; Moore and others, 2013, 2014). Health has been defined as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity (World Health Organization-Regional Office for Europe (WHO-Europe), 1984). However, people live in an interdependent existence with the totality of the living world. Hence, human health cannot be separated from the health of our total planetary biodiversity and has now been redefined as the ability of a body to adapt to new threats and infirmities (Lancet-Editorial, 2009). The complex interactions between the seas and oceans and human health and well? being have been viewed primarily within a risk framework, for example, the adverse impacts of extreme weather, chemical pollution (from domestic and industrial effluents, aquaculture, offshore industries, air pollutants and road dust run-off, and black carbon in the Arctic) and, increasingly, climate change (Borja and others, 2020; Depledge and others, 2017, 2019; Fleming and others, 2019; Pleijel and others, 2013; Tornero and Hanke, 2016; Valotto and others, 2015; Walker and others, 2019; Winiger and others, 2019). However, new research is expanding our concept of the “health” of the “global ocean”, with a broader recognition of its essential and beneficial contribution to the current and future health and well?being of humankind (Borja and others, 2020; Depledge and others, 2019; Ercolano and others, 2019; Lindequist, 2016; see table below). The marine environment contributes significantly to human health through the provision and quality of the air we breathe, the food we eat, the water we drink and marine-derived pharmaceuticals, as well as providing health-enhancing economic and recreational opportunities (see chaps. 5 and 8A; Ercolano and others, 2019; Lindequist, 2016). The coastal environment can also have a calming effect (White and others, 2013) and provide important cultural benefits (see chap. 28, sect. 1.4). However, at the same time, the marine environment is under pressure from such human activities as transport, industrial processes, fishing, agricultural and waste management practices, climate change-related impacts associated with rising sea levels and coastal erosion, and biological invasions. The figure below summarizes the links between the degradation of the marine environment and human health. The assessment and management of the impacts on marine ecosystems and on human health resulting from the pressures on those ecosystems have largely been undertaken separately under the umbrella of different disciplines and, frequently, with little or no obvious collaborative interaction (Depledge and others, 2013; Moore and others, 2013, 2014). Consequently, many of our perceptions of the interactions between the marine environment and human health are limited and still relatively unchallenged, leaving an opportunity to address critical knowledge gaps to further inform science-based policies for the sustainable use of marine resources and environmental and human health protection (see figure below and Moore and others, 2014). The complex nature of the interactions between the marine environment and human health was reviewed by the European Marine Board (Moore and others, 2013, 2014) and others (Borja and others, 2020; Depledge and others, 2013, 2017, 2019; Fleming and others, 2014, 2019). The reviews have emphasized the need for an interdisciplinary approach to address all levels of organization, from genes to ecosystems. There are five key scientific challenges to improving our understanding of the linkages between the marine environment and human health (Galloway and others, 2017; Moore and others, 2014): To improve the measurement and monitoring of the distribution of marine pollutants, including algal toxins, nanoparticles as contributing factors to cardiovascular disease and lung cancer (Chang and others, 2020; Liu and others, 2016; Moore, 2020; Mossman and others, 2007; Numan and others, 2015; Stapleton, 2019), microparticles and plastic marine litter as a vector, as well as pathogens and non-indigenous species as potential health hazards at required time and spatial scales (Galil, 2018; Vezzulli and others, 2016); To improve knowledge of processes and models of the dynamics of transport and transformation in the environment of marine pollutants, pathogens and non-indigenous species that present health hazards; To improve the assessment of marine pollutant, pathogen and non-indigenous species health hazard exposure and risk to humans (Galil, 2018; Moore and others, 2013, 2014; Vezzulli and others, 2016); To understand the impacts of waste management activities on the marine environment and human health; To find explanations for the association between the marine environment and observed human health benefits, described as the “Blue Gym” effect (Depledge and Bird, 2009; Robinson and others, 2020; White and others, 2013; Wyles and others, 2019), including socioeconomic influences (Li and Zhu, 2006; Sachs and others, 2001).", "This long-term study, performed during the years 2003-2005 and 2008-2009, investigated the carbon (C), nitrogen (N), and phosphorus (P) contents of the phyto- and zooplankton communities and the nutrient regime of Cabo Frio Bay, SE Brazil. The information intends to serve as baseline of the plankton C, N, and P stoichiometry for the calibration of biogeochemical and ecological models in support to future findings related to the local and regional phenomena of climatic change. Cabo Frio Bay is a small semienclosed system set adjacent to a region subject to sporadic coastal upwelling. Zooplankton exhibited average annual C, N, and P contents of 11.6 ± 6.9 %, 2.8 ± 1.8 %, and 0.18 ± 0.08 %, and phytoplankton (>20 ?m) 6.8 ± 6.0 %, 1.6 ± 1.5 %, and 0.09 ± 0.08 %, respectively. The C/N/P ratios correspond to the lowest already found to date for a marine environment. The low C contents must have been brought about by a predominance of gelatinous zooplankton, like Doliolids/ Salps and also Pteropods. Average annual nutrient concentrations in the water were 0.21 ± 0.1 ?M for phosphate, 0.08 ± 0.1 ?M for nitrite, 0.74 ± 1.6 ?M for nitrate, and 1.27 ± 1.1 ?M for ammonium. N/P ratios were around 8:1 during the first study period and 12:1 during the second. The plankton C/N/P and N/P nutrient ratios and elemental concentrations suggest that the system was oligotrophic and nitrogen limited. The sporadic intrusions of upwelling waters during the first study period had no marked effect upon the systems metabolism, likely due to dilution effects and the short residence times of water of the bay.", "Marine mining is the ocean’s new exploration frontier, and polymetallic crusts (PMCs) and ferromanganese nodules are considered a strategic resource for the future. Acoustic geophysical methods are a valuable tool for oceanic research and have been employed for several decades in the exploration of marine resources and environmental evaluations. The main objective of this work was to investigate the correlation between the chemical composition of PMCs from three different areas along the Brazilian continental margin and their physico-acoustic attributes (P-wave velocity, density and acoustic impedance). The results show that the geoacoustic properties of PMCs are correlated to their chemical composition. Measurements showed positive and negative trends between acoustic impedance and studied elements (Fe, Mn, Co, Cu, Zn, W and Ni) according to the direction of measurement, indicting high anisotropy levels. Our study sheds initial light on the correlation between acoustic properties and metal content of PMCs. The study facilitates assessments of the acoustic responses of PMCs allowing more efficient prospection and exploitation compared to ship-board geophysical techniques that are too qualitative to identify PMCs. The results can contribute to determining the best procedures and techniques for more efficient future exploration of this resource.", "The global impact of poor water quality was examined in a study by the Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) and WHO. Based on global estimates of the number of tourists who go swimming, and WHO estimates of the relative risks at various levels of contamination, the study estimated that bathing in polluted seas causes some 250 million cases of gastroenteritis and upper respiratory disease every year and that some of those people affected would be disabled over the longer term. Measured by adding up the total years of healthy life that are lost through disease, disability and death, the worldwide burden of disease incurred by bathing in contaminated seawater is some 400,000 disability-adjusted life-years (a standard measure of time lost owing to premature death and time spent disabled by disease), comparable to the global impacts of diphtheria and leprosy. GESAMP and WHO estimated that the cost to society, worldwide, amounted to about $1.6 billion per year (GESAMP, 2001). Furthermore, harmful or toxic algal blooms can induce serious neurological disease and also have major financial impacts (Bechard, 2020; Diaz and others, 2019). The most common pollutants tend to come from one of two places: humans or animals. Human faecal matter in water bodies constitutes the greatest public health threat because humans are reservoirs for many bacteria, parasites and viruses that are dangerous to other humans and can lead to a variety of illnesses. The cause of many problems can often be traced back to sewage overflows or leaky residential septic systems. Run-off from agricultural land can also represent a serious health concern, as faecal waste from farmed animals can contain pathogens, including various viruses, cryptosporidium, Escherichia coli and salmonella, while pet waste on beaches can also pose health threats to humans (Food and Agriculture Organization of the United Nations (FAO), 2017; Moore and others, 2014; Woods Hole Oceanographic Institution (WHOI), 2020). Exposure to contaminated seawater thus affects the health of those enjoying recreation by the sea and adversely affects coastal tourism and recreation. Drawing together the scientific work in the field, in 2003, WHO published Guidelines for Safe Recreational Water Environments: Coastal and Fresh Waters (WHO, 2003). More recently, WHO, with the support of the European Union, prepared recommendations on scientific, analytical and epidemiological developments relevant to the parameters for bathing-water quality, with special reference to Europe (WHO, 2018). WHO has indicated that the recommendations will inform the revision of the 2003 Guidelines (WHO, 2020). However, achievement of such standards requires adequate planning and infrastructure. Even where, as in some parts of India, strenuous efforts are being made to install properly operating sewage treatment systems, problems persist. For example, in Goa, a major tourist location, faecal coliform bacteria exceeded the relevant standards at all 10 of the beaches monitored (Goa State Pollution Control Board (GSPCB), 2019). The monitoring of bathing water will not achieve its aim of improving public health without improvements in the communication to the public of the findings so that they are readily understandable. The current European Union legislation on bathing water (European Union, 2006) provides for standardized ways of publicizing the results of the monitoring that is required. Similar systems are found in various Australian States (New South Wales Department of Planning, Industry and Environment (NSW-DPIE), 2020; South Australia Environment Protection Agency (SA-EPA), 2020) and in the United States (WHOI, 2020). Climate change may be influencing the prevalence of microbial infections (Deeb and others, 2018; Konrad and others, 2017). For example, increases in Vibrio vulnificus and Vibrio parahaemolyticus infections, both topical, and infections from ingesting seafood (oysters), have been described in relation to climate change, with rises in cases overall, as well as new cases found in high latitude areas that were previously not affected, as they are having more days over the minimum temperature threshold (Vezzulli and others, 2016).", "The present study characterizes the quality of sediments from the Paranaguá Estuarine Complex (South Brazil). Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs) were determined in sediment samples together with a series of different in vitro bioassays. The fish hepatoma cell line (PLHC-1) was used to determine the presence of cytotoxic compounds and CYP1A- and oxidative stress-inducing agents in sediment extracts. Ovarian microsomal fractions from sea bass (Dicentrarchus labrax) were used to detect the presence of endocrine disrupters that interfered with the synthesis of estrogens (ovarian CYP19). Despite the relatively low levels of pollutants and no evidence of negative effects based on guideline levels, sediments collected close to harbors were enriched with CYP1A-inducing agents and they showed higher cytotoxicity. In contrast, sediments from internal areas inhibited CYP19 activity, which suggests the presence of endocrine disrupters at these sites. Overall, the selected bioassays and the chemistry data led to the identification of potentially impacted areas along the Paranaguá Estuarine Complex that would require further action to improve their environmental quality.", "Aquaculture production is continuously growing worldwide, and marine fish farming in Brazil is still in its infancy. Intensive farming conditions may cause physiological stress to the cultured organism, which can be evaluated by citogenotoxic biomarkers. The aim of this study was to assess the genotoxic effect of the rearing conditions in red blood cells of juvenile cobia Rachycentron canadum by using comet assay and micronucleus and other nuclear abnormalities assay. Juvenile cobia were reared for 13 weeks in indoor tank with open water circulation and in near shore cage. The comet assay and the nuclear abnormalities assay detected higher DNA damage and higher nuclear abnormalities frequency in erythrocytes of fish reared in the indoor tank. Results showed that two methods are complementary. Additionally, cobia were injected with ß-naphthoflavone (BNF) at concentrations of 2mgkg-1 and 10mgkg-1 in laboratory controlled conditions, and maintained for 7 days in separate tanks to better understand the response mechanisms of this species to a toxic substance. The comet assay did not detect any significant differences between BNF injected and control fish, whereas nuclear abnormalities assay showed significant differences between BNF injected and the control groups. The damages identified by the comet assay are repairable breaks in the DNA strands, whereas nuclear abnormalities may be permanent. Possibly the period of maintenance after injection was enough to clean BNF from the organisms and to repair the breaks in the DNA strands. As cobia seems to respond very well to genotoxic elements, comet assay and nuclear abnormalities assay would be useful tools to monitor farming conditions.", "Human health can be affected by many aspects of food from the sea. Some problems are the result of pollutants (such as mercury) or pathogens (often from sewage and ballast water) discharged into the sea and taken up by plants, fish and shellfish that are harvested for human consumption (Takahashi and others, 2008). Others are the result of toxins generated by, or viruses found in, various biota in the sea and taken up by some fish and shellfish (see chaps. 10 and 11). According to WHO, mercury is one of the 10 most poisonous substances to human health (WHO, 2013). A principal form of mercury to which humans are exposed is organic methyl mercury (MeHg). The principal source of inorganic mercury in the sea is the burning of fossil fuels (see chap. 11). Such mercury is converted into MeHg by microbes in the aquatic environment, where it bioaccumulates in food webs. In humans, MeHg exposure occurs predominantly through the consumption of seafood. MeHg is a neurotoxin and is particularly harmful to fetal brain development. A large body of research has demonstrated a link between exposure to MeHg in the womb and developmental neurotoxicity (e.g., deficits in fine motor skills, language and memory) among populations that consume seafood regularly. A review of studies in 43 countries showed that pooled average biomarkers suggested an intake of MeHg that was: Several times above the Food and Agriculture Organization of the United Nations-WHO reference level for consumption in fish-consuming inhabitants of coasts and riverbanks living near small-scale gold-mining installations; Well over the reference level in consumers of marine mammals in Arctic regions; Approaching the reference level in coastal regions in South-East Asia, the western Pacific and the Mediterranean. Although the two former groups have a higher risk of neurotoxicity than the latter, the coastal regions of South-East Asia are home to very large populations. In all three areas, many of the samples showed levels of MeHg intake in excess of the reference value (Sheehan and others, 2014). Other experts, while recognizing the threat from MeHg, argue that it is important also to balance the benefits from fish-derived lipids with possible risks when considering fish as part of the diet of mothers and their children (Myers and others, 2015). Certain fish species have been identified as being at greater risk for MeHg exposure than others (e.g., MeHg biomagnifies in the aquatic food chain and larger predatory fish, such as shark, swordfish, king mackerel and certain species of tuna), so making appropriate choices in fish consumption can lead to increasing the benefits of eating seafood while decreasing the potential risk (Silbernagel and others, 2011).", "Data on the occurrence of cocaine (COC) and benzoylecgonine (BE) in marine environmental compartments are still limited, with few studies reporting superficial water contamination, mainly in tropical zones. In this sense, environmental data of these substances are essential to identify potential polluting sources, as well as their impact in costal ecosystems. The aim of this study was to evaluate the occurrence of COC and BE in seawater, sediment and mussels from a subtropical coastal zone (Santos Bay, São Paulo, Brazil), as well as to determine a field measured Bioaccumulation Factor (BAF). COC and BE were detected in all water samples in concentrations ranging from 1.91 ng·L?1 to 12.52 ng·L?1 and 9.88 ng·L?1 to 28.53 ng·L?1, respectively. In sediments, only COC was quantified in concentrations ranging from 0.94 ng·g?1 to 46.85 ng·g?1. Similarly, only COC was detected in tissues of mussels 0.914 ?g·kg?1 to 4.58 ?g·kg?1 (ww). The field-measured BAF ranged from 163 to 1454 (L·kg?1). Our results pointed out a widespread contamination by cocaine and its main human metabolite benzoylecgonine in Santos Bay. Mussels were able to accumulate COC in areas used by residents and tourists for bathing, fishing, and harvest, denoting concern to human health. Therefore, our data can be considered a preliminary assessment, which indicates the need to evaluate drugs (including illicit as COC) in environmental and seafood monitoring programs, in order to understand their risks on the ecosystem and human health.", "Polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are man-made organic chemicals that have adverse effects on aquatic organisms, sometimes altering ecosystem functioning with potential consequences for the coastal carbon cycle. This study assessed PCBs and OCPs in surface sediments of two estuaries with distinct historical land use on the coast of Pernambuco, northeastern Brazil. OCPs such as HCB, aldrin, dieldrin, isodrin, mirex, methoxychlor, endosulfans (?- and ?-isomers), HCHs (?-, ?-, ?- and ?-isomers) and chlordane-related compounds were below their respective limits of detection in all samples. Mean levels of PCBs in Pina Sound and Suape Estuary were 4.37 and 0.94 ng g-1 dry weight (dw), respectively. Average concentrations of DDTs in those same estuaries were 5.24 and 0.42 ng g-1 dw, respectively. No significant correlations were found between mud and contaminants (either PCBs or DDTs) at Pina Sound. In contrast, PCBs were significantly associated with mud at Suape Estuary. The greater contamination found at Pina Sound is consistent with land use of the urban, densely populated city of Recife. Residues of DDTs found in sediments of both estuaries reflect past local usage. Occasional adverse biological effects may be expected due to the levels of DDTs at several sites in Pina Sound. Lower levels of chemicals such as PCBs in the newly industrialized Suape Estuary suggest that a similarly low impact of legacy pollutants may be expected for future industrial enterprises around the world." ]

[ "Oncholaimus cobbi was described from the Brazilian coast. The area studied, Coroa Grande, is located in Sepetiba Bay, State of Rio de Janeiro, Brazil. Sampling was carried out monthly, from May 1998 through April 1999. Most of the population was represented by adults, of which non-ovigerous females were the most abundant category. The species reached its highest population density during the warmest months, and the highest densities of males and ovigerous females were seen in February 1999." ]

[ "A1253" ]

[ "Loliginid squids constitute marine resources of increasing importance in shelf ecosystems off the coast of South Brazil. However, the existing information and knowledge about the occurrence of early-life stages and causes of distributional patterns are insufficient. Here, we have revisited Brazilian historical plankton samples obtained from 11 oceanographic surveys to identify paralarvae and their abundances over time. The study area and time period cover the region between Cabo de São Tomé (22°S) and Cananéia (25°S) at depths down to 200 m from 1991 to 2005. Of the 246 paralarvae quantified, ~50% were identified to the genus or species level, including Doryteuthis spp. (D. sanpaulensis and D. plei), Lolliguncula brevis and a single specimen of Pickfordiateuthis pulchella. Paralarval occurrence and abundance peaked in different areas and were associated with distinct oceanographic conditions: D. sanpaulensis occurred in the northern region associated with cold waters and upwelling events, D. plei occurred primarily in the southern region of the study area and in warmer waters, and L. brevis was found in shallow and low salinity waters in the estuarine region off the coast of Santos. Overall, the highest abundance of paralarvae occurred in the nearshore, northernmost areas during summer, and this can be associated with the observed retention mechanisms caused by local circulation, seasonal upwelling, the intrusion of nutrient-rich waters, and spawning peaks. The present study provides new information and evidence for loliginid patterns in the area that may potentially be useful for better understanding the recruitment patterns and fishery assessments of squid populations.", "The logistics of research on deep-sea organisms imposes restrictions on studies that require repetitive long-term collections. Studies on the reproduction of deep-water corals have commonly been made without appropriate temporal series. This study included Madrepora oculata, Solenosmilia variabilis, Lophelia pertusa, and Enallopsammia rostrata, which are among the primary deep-sea reef building corals off Brazil. Samples were collected during 13 consecutive months by the Campos Basin Deep-Sea Corals Assessment Project (R&D Center of the Brazilian Energy Company, Petrobras) in Campos Basin (CB) off Rio de Janeiro State through a remotely-operated-vehicle at approximately 600. m depth. Of every monthly sampling campaign, an average of four to five colonies of all four species were investigated histologically. Colonies of both sexes were observed, indicating that all four species are gonochoric. For now, this appears to be the predominant reproductive pattern observed in corals in the area, as well as in deep-sea corals in general, where 80% of coral species are gonochoric. Although considered functionally gonochoric, M. oculata and L. pertusa presented a few colonies with different hermaphroditism patterns. E. rostrata and M. oculata presented continuous reproduction. Although fertile year-round, S. variabilis presents a reproductive peak between April and September (Autumn-Spring) in contrast with the seasonal reproduction recorded in the southwestern Pacific. L. pertusa had a seasonal reproductive peak, confirming previous observations of periodic reproduction in this species in the northeastern Atlantic. The possible spawning season of L. pertusa from CB concentrates between May and July (high frequency of mature gametes), while spawning occurs between January and March in the North Atlantic and between September and November in the Gulf of Mexico. Our results suggest that the studied species are broadcast spawners because no embryos or larvae were observed in any examined sample. This study, based on long-term sampling, provides the most complete data to date on the gametogenesis and temporal patterns of reproduction of four key deep-sea coral reef builder species.", "In January 2000, Guanabara Bay in Rio de Janeiro experienced a major oil spilling caused by a break down in one PETROBRAS oil pipeline. Over than 1.3 tons of fuel oil escaped into the bay water in the northern region. Studies of foraminiferal taphonomic assemblages in sediment samples collected on three periods in the same stations, before and after the spilling, were important for the pollution impact evaluation during eight years. In 2005, in the north region, TOC values were higher than in 1999. It was observed the increase of test abnormalities, corrosion and dwarfism. Abundance and species richness reduced in 2005 and increased in 2008 but they did not reach the 1999 levels. Trends of dominant species confirmed the increase of pollution values in 2005: Abundance of A. tepida increased while B. elegantissima reduced. In 2008 there was an increase in the species richness with the occurrence of agglutinated species.", "The determination of the period of parturition and identification of nursery areas are fundamental for the management and conservation of a fishing resource. Through combination of monthly abundance, length measurements, and development time of embryos we inferred about parturition time of the Blacktip sharks, Carcharhinus limbatus, from Southwestern Atlantic. Specimens of C. limbatus were caught from 2002 and 2008 by artisanal fleets from three different locations along the Brazilian coast using gillnets (mesh width ranging between 30 and 120 mm between opposite knots and operating from 9 to 120 m in depth), handlines (19 to 140 m depth) and longlines (6 to 90 m depth). Through a comparative analysis of fisheries landing data collected, we have verified neonatal (< 90 cm) catch peaks at specific times of the year in different locations and, matching with birth prediction of embryos, propose that C. limbatus presents a well-defined parturition time in late spring-early summer in Southwestern Atlantic. Moreover, we indicate supposed nursery grounds for the species along the Brazilian coast. This information will be crucial for stock assessments of the species and may serve as a basis for determining fisheries management measures.", "Aquaculture production is continuously growing worldwide, and marine fish farming in Brazil is still in its infancy. Intensive farming conditions may cause physiological stress to the cultured organism, which can be evaluated by citogenotoxic biomarkers. The aim of this study was to assess the genotoxic effect of the rearing conditions in red blood cells of juvenile cobia Rachycentron canadum by using comet assay and micronucleus and other nuclear abnormalities assay. Juvenile cobia were reared for 13 weeks in indoor tank with open water circulation and in near shore cage. The comet assay and the nuclear abnormalities assay detected higher DNA damage and higher nuclear abnormalities frequency in erythrocytes of fish reared in the indoor tank. Results showed that two methods are complementary. Additionally, cobia were injected with ß-naphthoflavone (BNF) at concentrations of 2mgkg-1 and 10mgkg-1 in laboratory controlled conditions, and maintained for 7 days in separate tanks to better understand the response mechanisms of this species to a toxic substance. The comet assay did not detect any significant differences between BNF injected and control fish, whereas nuclear abnormalities assay showed significant differences between BNF injected and the control groups. The damages identified by the comet assay are repairable breaks in the DNA strands, whereas nuclear abnormalities may be permanent. Possibly the period of maintenance after injection was enough to clean BNF from the organisms and to repair the breaks in the DNA strands. As cobia seems to respond very well to genotoxic elements, comet assay and nuclear abnormalities assay would be useful tools to monitor farming conditions.", "Higher mortality and less successful reproduction of marine biotas Captures of fish stocks at levels above maximum sustainable yield Globally, the levels of capture fisheries are near the ocean’s productive capacity, with catches on the order of 80 million tons. Exploitation inevitably reduces total population biomass through removals. As long as the fish stock can compensate through increased productivity because the remaining individuals face less competition for access to food and therefore grow faster and produce more progeny, then fishing can be sustained. However, when the rate of exploitation becomes faster than the stock can compensate through increasing growth and reproduction, the removal level becomes unsustainable and the stock declines. At present, about one quarter of all assessed fish stocks are being overfished and more are still recovering from past overfishing. This is undermining the contribution that they could make to food security. Ending overfishing is a precondition for allowing stocks to rebuild. Other stocks may still be categorized as “fully exploited” despite being on the borderline of overfishing. Those could produce greater yields if effectively managed. There are only a few means available to increase yields. Ending overfishing, eliminating illegal, unreported and unregulated fishing, bringing all fishery yields under effective management and rebuilding depleted resources may result in an increase of as much as 20 per cent in potential yield, provided that the transitional economic and social costs of rebuilding depleted stocks can be addressed. Overfishing can also undermine the biodiversity needed to sustain marine ecosystems. Without careful management, such impacts on biodiversity will endanger some of the most vulnerable human populations and marine habitats around the world, as well as threaten food security and other important socioeconomic aspects (such as livelihoods).", "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.", "There are about thousands of shell-mounds (sambaqui in Portuguese) along the Brazilian sea coast. They have been built by sea water and therefore geologists used sambaquis positions to indicate sea level in the past. In the state of Santa Catarina in southern Brazil Ca. 60 very large sambaquis are found. One of them near the town of Tubarão is called Congonhas II. In this work we carried out OSL and EPR dating of moluscus shells and sediments collected from Congonhas II from its base and from a point at higher position. For the samples from basal position of Congonhas II ages from 3850 ± 340 to 4040 ± 270 years and samples from higher position age of about 3300 ± 230 to 3400 ± 510 years have been obtained. These results agree with radiocarbon dates and geologically expected data relative to past sea level fluctuation.", "The population structure of Mithraculus forceps sampled monthly on Anchieta Island from January 1999 to December 2000 was studied. A total of 68 individuals were collected by SCUBA diving. The population presented normal and unimodal distribution, and the total sex ratio was 1.4:1.0 in favour of males. Ovigerous females were captured during all seasons. The pattern observed for the M. forceps population in Anchieta Island indicated the strategy favoured by environmental characteristics of the island and by coexistence with other decapod crustaceans in the studied area.", "The vegetation history and climate in southeastern Brazil, as well as the oceanic dynamics of the tropical Atlantic Ocean offshore, were reconstructed for the last 7.4 cal ka BP. This reconstruction was based on pollen, fern spores and dinoflagellate cysts identified in a marine core (CF10–04B). It was possible to verify the presence of an ombrophilous forest from 7.4 cal ka BP. Near the base of the PI zone low concentrations of pollen and fern spores are recorded, along with low frequencies of forest taxa and fern spores and an increase in pollen types of open vegetation, suggesting less humid climatic conditions than currently observed in the coastal regions of Southeastern Brazil. The assemblages of dinoflagellate cysts suggest a neritic zone with warm upper column temperature, high salinity and oligotrophic environment (evidenced by the presence of O. centrocarpum, Spiniferites spp. and L. machaerophorum). An increase in Tropical Waters (TW) and the approximation of the Brazilian Current (BC) in the middle shelf of southeastern Brazil in the mid-Holocene probably influenced the low accumulation of cysts, pollen grains, fern spores, and their associations. It is still possible to verify that at approximately 4.6 cal ka BP, an increase in the rainfall in the southeastern Brazilian region was probably the fundamental factor for the expansion of vegetation, mainly based on the considerable increases in hygrophytic and aquatic plants. The marked increase in the accumulation of dinoflagellate cysts, with the dominance of autotroph taxa (mainly O. centrocarpum, followed by Spiniferites spp), evidences the warmer waters of the BC and more intense surface upwelling of the South Atlantic Central Water (SACW)." ]

[ "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico." ]

[ "A424" ]

[ "The SCR (Steel Catenary Riser) was adopted by Petrobras as a cost-effective alternative for oil and gas export lines on deepwater fields, where large diameter flexible risers present technical and economic limitations. The SCR structures are subjected to several types of loads during their service life. These loads may be static or dynamic. When installed, the action of environmental phenomena like wind, current and sea waves on the floating unit, induces motions that will be transferred to the riser top connection. The random time domain dynamic analysis approach is considered to be more suitable to represent the loads and also die structural response due to the capability to represent existing non-linearities in the model. The sea-state spectra are treated by a time-simulation method, so fluid load non-linearity and fluid-structure interaction are well represented. Structural non-linearity, drag forces, fluid-structure relative velocity, and sea surface level variations are also taken into account. The fatigue damage calculation is directly related with stresses ranges composed along the whole structure service life. The load sets used in such analysis should be complete enough to represent all possible significant situations. This procedure results in a high computer time consuming necessary for several time-domain analyses, that is not compatible with a typical design schedule. Therefore, the load cases have to be reduced without lack of accuracy or safety. This paper presents the approach and methodology adopted in Petrobras to verify the SCR fatigue damage. The analysis performed and presented used the Petrobras's in-house computer codes ANFLEX and POSFAL, which were specially upgraded for this purpose.", "As part of the ultra-deepwater field development of the Santos Basin, 300km offshore the Brazilian coast, the Sapinhoa and Lula NE pioneering riser system was successfully installed by Subsea 7, acting as a contractor for Petrobras and partners (BG E&P Brasil and Repsol Sinopec Brasil, in Sapinhoa Field, BG E&P Brasil and Petrogal Brasil, in Lula NE Field). The full Engineering, Procurement, Installation and Commissioning (EPIC) project scope comprises the design, fabrication and installation of 4 buoys of 2800 tons moored 250m subsurface, of which 2 connect to the Floating Production, Storage and Offloading unit (FPSO) Cidade de Sao Paulo and 2 to the FPSO Cidade de Paraty; 27 Steel Catenary Risers (SCRs) with 3.9km each, 27 Pipeline End Terminations (PLETs) and anchorage suction piles at 2140m water depth. This Buoy Supporting Risers (BSR) system concept presents several advantages to overcome the challenges of installing SCRs on ultra-deep waters, such as, allowing decoupling between installation of risers and the production unit, reducing payload on the unit, reduced risks associated with clashes and very small dynamics transmitted from production unit to the risers, resulting in significant less fatigue issues. Due to sour and C02 service requirements for the production and water injection risers, it was decided to use mechanically lined pipe for the entire line, with the exception of the top and touch down sections, where metallurgical clad (metclad) pipe was used. Consequently, a significant amount of qualification, testing and inspection associated to welding lined and metclad pipes was required. In order to install Corrosion Resistant Alloys (CRA) lined pipes with a Reel-Lay vessel, a novel methodology for water pressurized spooling and pipelay was developed to mitigate the risk of liner damage during installation. Full-scale pressurized spooling trials were done ahead of the pipelay campaign for testing and validation of this methodology. In addition, analyses were performed to evaluate the BSR system behaviour during SCRs installation and to minimize buoy de-ballasting interventions. This paper describes the faced challenges and solutions engineered in the steel catenary risers' fabrication and installation scopes.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "The Exploration and Production Department of Petrobras asked the R&D Center the development of a production system for 1800 m water depth, in Campos Basin, which would allow the installation of Steel Caterany Risers (SCR) in the starboard side of a production platform. The subsurface buoy concept was chosen as one of the alternatives. This concept has being developed since the preliminary studies conducted in the first phase of JIP Deepstar. This concept has an advantage of uncoupling the movements of the platform from the risers, reducing the loads due to the risers in the platform and allowing the installation of this system before the installation of the production vessel, anticipating the production of the field. This article shows the main characteristics of the buoy, its sizes, results of structural analyses and installation procedures for a buoy which sustains 14 SCR and 5 umbilicals in one side and 14 flexible jumpers and the same 5 umblicals in the opposite side. This concept was tested in two model test tanks, where it was verified that this concept is feasible. Also, information related to a field trial with a prototype installed in Brazilian waters will be presented.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "The mechanism by which seaward dipping reflectors (SDRs) are formed is a topic of debate. Two contrasting models exist for their formation, the volcanic-faulting model and the volcanic-loading model. Each of these models has important implications for the processes which control the structure and formation of magma-rich rifted continental margins. We have examined high-quality deep-seismic reflection data across the Pelotas Basin, offshore Brazil. These data reveal a remarkable set of SDRs, for which we have investigated the likely nature of their formation. The total package of SDRs has an across-strike width of ~200 km and a variable vertical thickness of ~10–17 km, previously interpreted as volcanic flows. Detailed observations, however, show changes in seismic character and geometry within the SDR package, which suggest a complex and varied evolution. We have used gravity anomaly inversion and seismic observations together to investigate the likely composition of the SDRs by determining the proportion of basaltic material to sedimentary/volcaniclastic material (basalt fraction) within the SDRs. This has been achieved by minimising the difference between the depth of the gravity Moho and seismic Moho in order to quantify the lateral variation in basalt fraction, taken to be proportional to the bulk density of the package. The density of the SDR package together with seismic interpretation is then used to infer the composition, depositional environment, source and time of formation relative to breakup. Our analysis suggests that the overall SDR basalt fraction and bulk density decrease oceanwards, possibly due a change in the type of volcanic deposits from predominantly subaerial to volcaniclastics, possibly deposited subaqueously. The SDRs can be split into three sub-packages. The two inner SDR packages are interpreted to consist of lava flows sourced from syn-tectonic, subaerial eruptions, associated with the onshore Paraná Large Igneous Province, flowing eastwards into an extensional basin. The outer SDR package shows reflector geometries that progressively offlap oceanwards, interpreted as extrusives sourced from an eastwards-migrating, newly formed ocean ridge. Our analysis suggests that both the volcanic-faulting and volcanic-loading models for SDR formation are applicable to the Pelotas rifted margin, recording distinct syn-rift and syn-breakup magmatic events. We show that both SDR formation models can be recognised in a naturally occurring example and can coexist on the same margin.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top.", "This paper reports the Lessons Learned from an innovative linepipe solution that was successfully implemented on P55 Deepwater Project. The P55 field is located offshore Brazil, in the northern area of Campos Basin, in a water depth ranging from 1500m to 1900m. The scope of work consisted in engineering, procuring, fabricating and installing 16 rigid Steel Catenary Risers (SCRs), which are the first of their kind in this area. The corresponding 12-inch SCR qualification results are presented in the perspective to show the significant benefits of the technology used and its potential developments to High Pressure & High Temperature applications. In order to meet tight Hi-Lo requirements together with high fatigue performances, innovative Pipe End Design and associated automatic welding procedures were developed and qualified. The paper describes the complete sequence of pipe manufacturing process, from hot-rolling to final machining, which resulted in a concentric and reproducible pipe end geometry, ideal for limiting Stress Concentration Factors. An extensive qualification program of Full Scale Fatigue test was conducted on girth-welded strings and the associated results showed performance levels at least four times above the target curve. Moreover, Lessons Learned from the offshore campaign established that developed Pipe End Design led to significant improvements in welding times and subsequent J-laying rates. Details on how the technology effectively reduces critical times and lowers rejection rates are provided on the basis of the actual P55 offshore campaign. In addition to the advantages detailed in the paper, the presented linepipe solution proves to be also applicable to High Temperature fields, since the enhanced fatigue behavior was found to compensate a temperature derating up to 270°C. In fact, the presented manufacturing and welding technologies have opened the perspective of ongoing Developments, which are believed to bring a reliable solution for combined High Pressure and High Temperature applications.", "The Santos Basin Pre-Salt Cluster (SBPSC), Offshore Southeast Brazil, is a unique scenario, posing great development challenges. The microbial carbonate reservoir is unusual regarding its origin and petrophysical properties; the fluids have a variable CO2 content; the few analogue reservoirs around the world do not compare in terms of volumes, water depth and distance to the coast; and there are also flow assurance issues. Considering the importance of these reserves for the Brazilian economy and the opportunity to accelerate cash flow, Petrobras and its partners have opted for a fast track development, including extended well tests (EWTs) and production pilots. The current Petrobras Business Plan (2011-15) foresees mat the SBPSC areas alone will produce over 500,000 boe/d in 2015 and over 1,100,000 boe/d in 2020. These numbers refer only to Petrobras share and do not include me transfer of rights with economic compensation from the Brazilian government to Petrobras. Therefore, the initial development phase will have to cope with several uncertainties, mainly the subsurface ones. Some of the most relevant are the quality and the heterogeneity degree of each reservoir zone; the compositional grading of the fluids; the performance of different EOR methods; and the presence of fractures affecting the flow. How to specify and anticipate the acquisition of expensive equipment, such as FPSOs and subsea devices, with uncertainties to be clarified? When is it worth to invest in more data acquisition, such as EWTs, core and fluid sampling, extensive lab analysis or even more appraisal wells? The timing and the uncertainty reduction foreseen for each initiative must be taken into account. On the other hand, when is it better to pay for extra flexibilities, accepting the inevitable CAPEX increase? Some examples would be: smart completions and possibility to inject different chemical products in the wells; gas and water separated lines for each satellite injector; flexible subsea layout, allowing multiples strategies and the addition of more wells; FPSO plants designed to inject desulphated water, or to export, import or reinject me gas, and also to separate variable CO2 contents in the produced fluids. This paper aims to discuss the influence of the main subsurface uncertainties in the selection of alternatives to develop the giant fields in the SBPSC, in a fast track way." ]

[ "Description of environmental changes between 2010 and 2020 Plastic marine litter also smothers and damages benthic organisms. The potential impact is not only at the level of organisms, but also at the population and ecosystem levels (Rochman and others, 2016). The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services confirmed the negative impact of plastics on biodiversity, with possible imbalances and disruptions in ecosystem diversity (Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, 2019). After the tsunami in Japan in 2011, 289 species of macrofauna and macroflora were rafted to North America in just six years (Carlton and others, 2017), a very uncommon scheme, with potential long-term consequences (Murray and others, 2018). Aside from being a physical contaminant, plastics and microplastics often contain chemical additives, such as phthalates and brominated flame retardants (see chap. 11) and capture other contaminants. Laboratory studies demonstrate that microplastics can harm organisms and populations at higher concentrations than those found in nature. However, the best available evidence suggests that microplastics do not yet pose a widespread ecological risk (as opposed to a risk to individual organisms), except in some coastal waters and sediments (SAPEA, 2019). Human health is a primary concern, despite a rather limited knowledge of impacts such as injuries and accidents or through possible contamination after a potential release of chemicals (SAPEA, 2019) or owing to the presence of microplastics in seafood, and there are few appropriate risk assessment studies. Such concerns may cause people to change their behaviour (e.g., tourism habits or reduction in the consumption of seafood)." ]

[ "B2300" ]

[ "The new map shows the way in which the ocean consists of four main basins (the Arctic Ocean, the Atlantic Ocean, the Indian Ocean and the Pacific Ocean) between the tectonic plates that form the continents. The tectonic plates have differing forms at their edges, giving broad or narrow continental shelves and varying profiles of the continental rises and continental slopes leading from the abyssal plain to the continental shelf. Geomorphic activity in the abyssal plains between the continents gives rise to abyssal ridges, volcanic islands, seamounts, guyots (plateau-like seamounts), rift valley segments and trenches. Erosion and sedimentation (either submarine or riverine when the sea level was lower during the ice ages) has created submarine canyons, glacial troughs, sills, fans and escarpments. Around the ocean basins there are marginal seas, partially separated by islands, archipelagos or peninsulas, or bounded by submarine ridges. These marginal seas have sometimes been formed in many ways: for example, some result from the interaction between tectonic plates (for example the Mediterranean), others from the sinking of former dry land as a result of isostatic changes from the removal of the weight of the ice cover in the ice ages (for example, the North Sea). The water of the ocean circulates within these geological structures. This water is not uniform: there are very important physical and chemical variations within the sea water. Salinity varies according to the relativity between inputs of freshwater and evaporation. Sea areas such as the Baltic Sea and the Black Sea, with large amounts of freshwater coming from rivers and relatively low evaporation have low salinity – 8 parts per thousand and 16 parts per thousand, respectively, as compared with the global average of 35 parts per thousand (HELCOM 2010, Black Sea Commission 2008). The Red Sea, in contrast, with low riverine input and high insolation, and therefore high evaporation, has a mean surface salinity as high as 42.5 parts per thousand (Heilman et al 2009). Seawater can also be stratified into separate layers, with different salinities and different temperatures. Such stratification can lead to variations in both the oxygen content and nutrient content, with critical consequences in both cases for the biota dependent on them. A further variation is in the penetration of light. Sunlight is essential for photosynthesis of inorganic carbon (mainly CO2) into the organic carbon of plants and mixotrophic species1 . Even clear water reduces the level of light that can penetrate by about 90 per cent for every 75 metres of depth. Below 200 metres depth, there is not enough light for photosynthesis (Widder 2014). The upper 200 metres of the ocean are therefore where most photosynthesis takes place (the euphotic zone). Variations in light level in the water column and on the sea bed are caused by seasonal fluctuation in sunlight, cloud cover, tidal variations in water depth and (most significantly, where it occurs) turbidity in the water, caused, for example, by resuspension of sediment by tides or storms or by coastal erosion. Where turbidity occurs, it can reduce the penetration of light by up to 95 per cent, and thus reduce the level of photosynthesis which can take place (Anthony 2004).", "A new digital, global seafloor geomorphic features map has been built (especially to assist the World Ocean Assessment) using a combination of manual and ArcGIS methods based on the analysis and interpretation of the latest global bathymetry grid (Harris et al., 2014; Figure 1). The new map includes global spatial data layers for 29 categories of geomorphic features, defined by the International Hydrographic Organization and other authoritative sources. The new map shows the way in which the ocean consists of four main basins (the Arctic Ocean, the Atlantic Ocean, the Indian Ocean and the Pacific Ocean) between the tectonic plates that form the continents. The tectonic plates have differing forms at their edges, giving broad or narrow continental shelves and varying profiles of the continental rises and continental slopes leading from the abyssal plain to the continental shelf. Geomorphic activity in the abyssal plains between the continents gives rise to abyssal ridges, volcanic islands, seamounts, guyots (plateau-like seamounts), rift valley segments and trenches. Erosion and sedimentation (either submarine or riverine when the sea level was lower during the ice ages) has created submarine canyons, glacial troughs, sills, fans and escarpments. Around the ocean basins there are marginal seas, partially separated by islands, archipelagos or peninsulas, or bounded by submarine ridges. These marginal seas have sometimes been formed in many ways: for example, some result from the interaction between tectonic plates (for example the Mediterranean), others from the sinking of former dry land as a result of isostatic changes from the removal of the weight of the ice cover in the ice ages (for example, the North Sea).", "Wind-driven mixing affects only the surface of the ocean, mainly the upper 200 metres or so, and rarely deeper than about 1,000 metres. Without the ocean’s thermohaline circulation system, the bottom waters of the ocean would soon be depleted of oxygen, and aerobic life there would cease to exist. Superimposed on all these processes, there is the twice-daily ebb and flow of the tide. This is, of course, most significant in coastal seas. The tidal range varies according to local geography: the largest mean tidal ranges (around 11.7 metres) are found in the Bay of Fundy, on the Atlantic coast of Canada, but ranges only slightly less are also found in the Bristol Channel in the United Kingdom, on the northern coast of France, and on the coasts of Alaska, Argentina and Chile (NOAA 2014). Global warming is likely to affect many aspects of ocean processes. Changes in seasurface temperature, sea level and other primary impacts will lead, among other things, to increases in the frequency of major tropical storms (cyclones, hurricanes and typhoons) bigger ocean swell waves and reduced polar ice formation. Each of these consequences has its own consequences, and so on (Harley et al., 2006; Occhipinti-Ambrogi, 2007). For example, reduced sea ice production in the polar seas will mean less bottom water is produced (Broecker, 1997) and hence less oxygen delivered to the deep ocean (Shaffer et al., 2009).", "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "The Pará-Maranhão/Barreirinhas margin, North Brazil, is a pull-apart passive margin, with two strike-slip borders, formed during the opening of the Equatorial Atlantic Ocean during Cretaceous time. Its geometry and evolution are speculative due to the lack of information on the crustal structure and the crustal nature. We present here the E-W profiles of the MAGIC (Margins of brAzil, Ghana and Ivory Coast) deep seismic experiment, a joint project between French and Brazilian universities, research institutes and the industry. Fifty-six Ocean Bottom Seismometers (OBS) and a 4.5 seismic streamer were deployed at sea along 2 of the 5 MAGIC profiles. One profile was extended onshore by installing 8 land stations. We perform forward modelling through combined interpretation of the multichannel seismic and of the main reflected and refracted of these phases recorded by the OBSs. The final P-wave velocity models reveal distinct structural domains from onshore Brazil towards the Atlantic Ocean characterized by variations of the crustal thicknesses and velocities: (1) an unthinned continental crust below the São Luís Craton, where the crust is 33 km thick, (2) a 60 km wide necking domain below the Ilha de Santana Platform; (3) offshore, east of the continental slope, a 10 km-thick deep sedimentary basin underlain by a 5 km thick crust with velocity of 6.2–6.9 km/s that we interpret as an exhumed lower continental crust, on the top of an Anomalous Velocity Layer (AVL) probably made of intrusions of mantle-derived melts into the lower continental crust, or a mixture of them; (4) eastwards, the limit of the previous domain is marked by NW-SE aligned volcanoes and the disappearance of the AVL. The sedimentary succession becomes thinner (6 km) overlaying a proto-oceanic crust characterized by seismic velocities higher than “normal” oceanic crust in its upper part, but in continuity with the velocity described in the previous domain; (5) followed by a more characteristic but thin oceanic crust. The middle/lower continental crust seems not only to have a crucial role in the genesis of the passive margin but also to be involved in the genesis of the first oceanic crust. The passage to a typical oceanic crust seems to have occurred progressively by steps: first in the deeper layer by the setup of more and more intrusions of mantle-derived melts at the base of the crust or mixture of exhumed lower crust and mantle, producing a domain of proto-oceanic crust, then by the emplacement of an upper 1-2 km-thick layer with typical oceanic characteristics.", "Wave-dominated nearshore deposits are commonly regarded as laterally-continuous, homogeneous, sheet-like reservoirs that can be resolved at the parasequence scale. Many reservoirs, however, have an internal complexity that becomes clearer during production, indicating unexpected internal compartmentalization. Modern wave-dominated nearshore environments are extremely variable due to the effects of allogenic and autogenic processes. Relative sea-level change and shoreline trajectory has been indicated as key controlling factors on the distribution of sand in Quaternary coastal systems worldwide. In this paper we use 3D seismic data to describe the geomorphology of buried, Campanian and Eocene wave-dominated coastal deposits in two stratigraphic intervals within shelf-margin clinoforms in the Santos Basin, SE offshore Brazil. By applying seismic attributes and comparison with modern analogues we interpret the paleoenvironments and correlate them with well-log motifs and styles of shelf-margin trajectories in order to discuss the balance of allogenic and autogenic controls on nearshore reservoir heterogeneity. The sand-rich nearshore deposits appear in the seismic data as distinct topset amplitude anomalies recording shoreline transit across the shelf. The Campanian interval comprises reflectors formed in a predominantly normal-regressive context, while the Eocene interval depicts partially-eroded topset reflectors associated with forced regressions and retrograding reflectors associated with transgressions. Nearshore seismic-geomorphic elements were grouped in associations of strandplains, barrier islands/spits and lagoons, and partially-eroded nearshore. Strandplains are related sub-horizontal to ascending regressive clinoform trajectories where wider strandplains are associated with sub-horizontal trajectories. Nearshore erosion and fluvial incision are associated with descending trajectories within forced regressions, while barrier islands/spits and lagoons are associated with transgressive trends. Transgressive trajectories generated coastal systems with high mud content and discontinuous sand bodies along strike and dip, while forced regressions resulted in sand-rich systems that are complex and highly compartmentalized by subaerial erosion. The most attractive reservoirs are associated with normal-regressive intervals under low rates of relative-sea level rise, forming relatively homogeneous sand-rich strandplains.", "Based on the evolution of the tectonic plate and pregeography, the passive continental margin basins on the east coasts of Brazil experienced three prototype phases. Berremian intracontinental rift megasequence in lower cretaceous, comprising lacustrine sediments overlying Neocomian basalts, Aptian intercontinental rift basin, in which the laqoon transitional megasequence deposited, including two sedimentary units:the lower, mostly composed by carbonate and the upper represented by halite, and the drift phase, passive continental margin basin from Albian until the present-day, deposited with the marine megasequence. The Lower Cretaceous lacustrine calcareous black shale is the main source rocks of the giant oil and gas fields. The reservoirs include two sects:lower laqoon carbonatea nd upper, Tertiary and Cretaceous turbidites. The carbonate reservoirs is sealed by halite, while the turbidites are preserved by marine shale. The lower Cretaceous lacustrine source rocks starts to generate the oil and gas from Eocene-Miocene formed \"double insurance\" type models of giant oil and gas fields. If no salt windows existing, hydrocarbons migrated vertically along faults and are trapped mainly in the pre-salt carbonates. If salt windows exiting, hydrocarbons are accumulated in Upper Cretaceous-Tertiary turbidites which are packaged by marine facies shale.", "The major ocean currents connect geographic regions and also exert control on ocean life in other ways. Currents form natural boundaries that help define distinct habitats. Such boundaries may isolate different genetic strains of the same species as well as different species. Many marine animals (for example, salmon and squid) have migration patterns that rely upon transport in major ocean current systems, and other species rely on currents to distribute their larvae to new habitats. Populations of ocean species naturally fluctuate from year to year, and ocean currents often play a significant role. The survival of plankton, for example, is affected by where the currents carry them. Food supply varies as changing circulation and upwelling patterns lead to higher or lower nutrient concentrations. The heterogeneity of the oceans, its water masses, currents, ecological processes, geological history and seafloor morphology, have resulted in great variations in the spatial distribution of life. In short, biodiversity is not uniformly distributed across the oceans: there are local and regional biodiversity “hotspots” (see Chapters 33 and 35). Figure 3 shows a way in which the diversity of species is consequently distributed around the world. Various classification systems have been devised to systematize this variety, including the European Nature Information System (EUNIS) (Davies and Moss, 1999; Connor et al., 2004) and the Global Open Ocean and Deep Sea-habitats (GOODS) classification and its refinements (Agnostini 2008; Rice et al 2011)).", "Circular to elliptical topographic depressions, isolated or organized in trails, have been observed on the modern seabed in different contexts and water depths. Such features have been alternatively interpreted as pockmarks generated by fluid flow, as sediment waves generated by turbidity currents, or as a combination of both processes. In the latter case, the dip of the slope has been hypothesized to control the formation of trails of downslope migrating pockmarks. In this study, we use high-quality 3D seismic data from the offshore Ceará Basin (Equatorial Brazil) to examine vertically stacked and upslope-migrating trails of depressions visible at the seabed and in the subsurface. Seismic reflection terminations and stratal architecture indicate that these features are formed by cyclic steps generated by turbidity currents, while internal amplitude anomalies point to the presence of fluid migration. Amplitude Versus Offset analysis (AVO) performed on partial stacks shows that the investigated anomalies do not represent hydrocarbon indicators. Previous studies have suggested that the accumulation of permeable and porous sediments in the troughs of vertically stacked cyclic steps may create vertical pathways for fluid migration, and we propose that this may have facilitated the upward migration of saline pore water due to fluid buoyancy. The results of this study highlight the importance of gravity-driven processes in shaping the morphology of the Ceará Basin slope and show how non-hydrocarbon fluids may interact with vertically stacked cyclic steps.", "The winds in the atmosphere are the main drivers of these ocean surface currents. The interface between the ocean and the atmosphere and the effect of the winds also allows for the ocean to absorb oxygen and, more importantly, carbon dioxide from the air. Annually, the ocean absorbs 2,300 gigatonnes of carbon dioxide (IPCC, 2005; see Chapter 5). In addition to this vast surface ocean current system, there is the ocean thermohaline circulation (ocean conveyor) system (Figure 3). Instead of being driven by winds and the temperature difference between the equator and the poles (as are the surface ocean currents), this current system is driven by differences in water density. The most dense ocean water is cold and salty which sinks beneath warm and fresh seawater that stays near the surface. Cold-salty water is produced in sea ice “factories” of the polar seas: when seawater freezes, the salt is rejected (the ice is mostly fresh water), which makes the remaining liquid seawater saltier. This cold saltier water sinks into the deepest ocean basins, bringing oxygen into the deep ocean and thus enabling aerobic life to exist." ]

[ "The offshore O&G production has been increasing considerably in the last five years. Therefore, to guarantee the safety of their operations, the O&G companies are being pushed by regulators agencies to establish a robust and efficient safety management system, particularly in Brazil, where the Petroleum National Agency published, in 2015, the SGSS (Technical Regulation of the Subsea Systems Operational Safety Management System). The new regulation forced Brazilian Operators, such as Petrobras, to promote a couple of initiatives, in order to increase the safety of their offshore operations. One of these initiatives has its focus into eliminate or minimize the risks in operational phase, maximizing the potential to avoid them during engineering design phase, where the ability to influence safety is higher than another project phase. One of the challenges of this approach is related to the fact that, in general, and regarding operational safety, the engineering design works in a passive way, in other words, the safety improvements in the new projects only are applied if a strong operational safety issues feedback process is established. Operators have been noted that this operational feedback to design engineers is not the only way to achieve a high level of safety in their operations and facilities. There is a consensus that the engineering design shall work in an active way, being more predictive than corrective, in order to avoid operational issues. The objective of this paper is present a new approach regarding the operational safety focused on engineering design phase, establishing new process, methodologies, actions and closing the gaps between design and operational teams to enhance operational safety." ]

[ "A288" ]

[ "In a scenario of huge investments in the quest for new oil and natural gas discoveries, the oil industry has reached a consensus: no easy fields to be developed remain undiscovered, especially in offshore environments. New and old challenges on well drilling such as drilled extensions over 6000 m, sub-salt drilling, very narrow operational windows, operational problems like lost of circulation, stuck pipe, and kicks are aggravated when drilling in high pressure and high temperature (HPHT) environments. In the world's exploratory context, the occurrence of HPHT areas is an increasing trend. It is the materialization of the worst case scenario for well drilling and safety, formed by great challenges and operational, environmental, and economic risks. Field experience has shown that the economical risks have been overshadowed by the great premium target: increments on reserves. However, if the well safety aspect is dealt with the conventional approach, the oil industry is at risk of losing its investments, causing great impacts to the environment and also to the company's image. Since HPHT well construction costs are so much higher than those of traditional wells, the scope of knowledge and science on well safety, once limited to kick prevention and well control contingencies, are now an integral part of the technical and economic feasibility of well construction. Within this context, this work surveys the best HPHT techniques and procedures practiced by the oil industry, presents the new researches and trends and shares some valuable lessons learned on Petrobras' operations in Brazil and throughout the world.", "This work explains the process of how a bit was designed specifically to address drilling challenges of the reservoir section of the Mero Field offshore Brazil. The performance of this new bit is compared to previous bits used in the field. A systematic process to design and evaluate the performance of a new bit involves interaction with the operator to understand the challenges and gather information, evaluate previous bit performances, use software to simulate the new bit design based on drilling conditions in the field, manufacture the bit according to design specifications, run the bit according to planned parameters, capture and report results, and evaluate results to identify possible improvements. The reservoir section has a high hardness and is primarily composed of calcareous rock and silica intercalations. Since the discovery of the Mero Field, more than 17 wells have been drilled by different companies. In the majority of the wells, the reservoir section was drilled using impregnated bits and turbines. As a result, the application of a systematic process was used to solve operator challenges where a new bit was designed and run in the field to drill the reservoir section of two wells. A comparison was performed between the previous bits used in the field and the new bit concept, certifying that the new bit reduced the reservoir section drilling time by 59%. This work discusses improved drilling efficiency in the reservoir section by drilling with a new bit design in a field where only impregnated bits and turbines were used. This created a new benchmark for drilling performance in the Mero Field.", "The Libra project is exploring and developing a very large deposit of oil and gas in the pre-salt area of Santos Basin, 100 miles offshore Brazil's coastline. Five companies have come together in a consortium together with Pré-sal Petróleo SA (PPSA) to develop this area under the country's first Production Sharing Contract (PSC). While still in the exploration phase, the project has been moving at a rapid pace, creating full field development scenarios, drilling wells, developing a system to collect dynamic reservoir information, and preparing for the initiation of its first production FPSO project. Ultimately, the field could see the drilling of nearly a hundred deepwater wells and the installation of several very large FPSOs. The area will be active with seismic, drilling, construction, production, installation and support vessels for many years. By applying industry safety statistics to the large number of man-hours required to bring these plans to life, the potential for fatalities, Lost Time Accidents (LTI's) and other HSE incidences associated with the project can be statistically extrapolated. With these figures in mind, Project Leadership embarked upon a program to substantially improve safety performance with an objective to not only develop this rare field efficiently, but to establish a legacy of exceptional HSE performance. Now three years into Libra's exploration and development, and already exceeding 20 million man-hours expended, this paper seeks to share the steps taken to improve the HSE Culture of the Libra team and the performance of its contractors and subcontractors. Examples of physical changes in specifications to improve process safety, and changes in leadership behavior will be cited. The paper will discuss the successes, challenges, and future opportunities, in the hope that broader discussion of these efforts will assist this project and the industry to achieve project objectives while assuring safe working environments.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "Improved sustainability performance in increasingly complex business environments is a challenging task for organizations operating in many different industries. In the offshore oil and gas industry, the use of potentially hazardous materials and operation under progressively hostile environments increases the risk of major accidents. Regulators have been trying to catch up on the design of regulatory frameworks that prevent these types of events, aiming to protect people, assets, and the environment. Although there are some recommended practices that companies have been using as the basis for their process safety management systems (PSMS), lack of uniformity and inefficient enforcement remain as two fundamental problems. This paper explores these two problems and takes some first steps toward a broader discussion about these important issues. We draw from the literature on sustainable operations to develop a descriptive case study of the offshore oil and gas industry by employing document analysis and an analysis of the Health, Safety and Environment Management System (HSEMS) of Petrobras, a world leader energy company. By employing multiple primary and secondary data collection strategies, including a number of formal expert interviews, we map, explore and compare major recommended practices for PSMS, identify a series of gaps in policy and practice, and offer a number of recommendations and implications for practice, policy, and research.", "Objective/Scope: Applicability of Enhanced Oil Recovery (EOR) processes is gaining interest among offshore operators in recent years. CO2/miscible gas injection and Water Alternating Gas injection (WAG) are the most attractive EOR methods being considered by most offshore operators. Due to limitations imposed by the surface facility, any process optimization done through standalone reservoir simulation could be unreliable as the facility constraints and its effects are neglected. In order to minimize risk and reduce uncertainty, successful modelling and optimization of such projects requires integration of subsurface modelling with surface facility model. In this work, field development and optimization of a complex offshore production system, from a Pre-Salt carbonate reservoir offshore of Brazil is studied. Different field development scenarios, including water flooding, miscible gas injection, and WAG injection, are considered. Compositional fluid model is used in order to correctly model the fluid mixing effects and miscibility. Pressure change and thermal effects are considered in all the facility equipment. The complexities of the surface network, including gas sweetening, compression, and fluid blending are included in the integrated model. A new multi-user, multi-disciplinary Integrated Production System Modelling (IPSM) tool is used to fully-implicitly couple reservoir simulation with surface facility model. Production from the offshore asset is optimized for different development scenarios. The provided IPSM approach optimized operational schemes that were consistent with the constraints of the offshore facility. Additionally, with this new approach, all users from different disciplines were able to collaborate seamlessly, and any possible inconsistencies and discontinuities that could occur due to use of multiple decision making tools were removed. The use of integrated production systems modelling for optimizing EOR schemes in offshore assets, particularly miscible WAG, is proved to provide more robust answers. The complexities and Uncertainties of such processes, for both reservoir and facility models, are successfully studied.", "During basic design development for new FPSO projects in Brazilian pre-salt exploration, digital technologies were employed, in order to achieve constructability design requirements, construction and commissioning specification checks. Due to its benefit cost, schedule, quality, and overall project objectives and deep influence in platform safety and operability, in a process explained in Figure 1. Those digital technologies, such as the use of databases, computer aided engineering (CAE), analysis tools, 3D simulations and consistency check, were identified in constructability reviews and were developed to achieve the best constructability procedures and solve construction inconsistencies between several involved disciplines in posterior detailed design, procurement and commissioning phases. This manuscript aims to present the use of digital technologies to support constructability analysis in offshore oil & gas production facility - surface installations - projects of Petrobras.", "Offshore oil development projects are complex and require high capital investment. The application of methodologies that seek optimization of economic parameters of projects became particularly important since 2014, when oil barrel prices plummeted. At that moment, some projects required modifications to regain economical attractivity. The recovery of project profitability depended on the break-even oil price criterion fulfillment (typically USD 40-45) among other requirements. This paper presents a methodology developed by Petrobras to increase the profitability of offshore projects in conceptual design phase while meeting the technical and safety minimum requirements. Successful solutions provided by the Petrobras team, enabled through this methodology, to make more than 15 projects economically viable are presented. The solutions include phased development, reuse of flexible lines from declining production wells, application of new technologies (including boosting and processing), use of innovative subsea architectures, procedures to increase ramp-up speed, long tie-backs, etc. This article is focused on subsea engineering solutions.", "The development of Brazil Offshore fields using flexible pipes took the advantage of the possibility to move around lines, anticipate the production and postpone the decision of where exactly the development phase wells should be placed, making the drilling campaign easier, cheaper and faster. For the Pre-Salt fields, mainly in Santos Basin, it is observed high concentrations of H2S and CO2, two major impact contaminants for the metallic layers of the flexible pipe. A new failure mode by SCC is the most concerning one and have several approaches either focused on the installed fleet or focused in the next pipes to be delivered. SCC is a condition that induces cracks in the pipes metallic layers and need three elements to happen: water, stress and susceptible material. If one of these three elements is suppressed, the phenomena is not to happen. This paper will cover and present a design of a seal tight end fitting also with capabilities to be seal tested from the shop during the factory acceptance test and further means to identify if the flexible pipe section is flooded or dry visually, using ROV. This information is key for the integrity management of the flexible pipes applied to pre salt fields to assure the most extent of the service life.", "Current oil prices have made the offshore exploration of oil reserves a major challenge for oil companies. Standardization and extensive use of chattered units has allowed Petrobras to effectively promote competitiveness, cost reduction and reduced schedules in its projects. As a step forward in its pursue for cost reduction Petrobras has recently looked into Integrated Field Development. This article presents a low cost methodology for the design of production systems. Experience shows that integration among reservoir, flow assurance, subsea, well design and topsides teams is crucial for achieving a successful project. Besides being pursued for a long time, this integration has only been partially achieved in the industry and cost reduction opportunities have been lost. This article shows a cost driven methodology that can be used for guidance in the generation and screening of FEL1 alternatives. Metrics for the various parts of the system have been created and integrated in a simulation environment that allows economic analysis of different sorts. In FEL2 the methodology allows, for example, the evaluation of the number and capacity of platforms, the optimal schedule of well construction, the use of flexible or rigid risers, the diameter of production lines and the choice of technologies for handling streams with high C02 concentration in an integrated way. A simulation of an oil field shows effective results. In this new methodology a representation of each discipline is developed to allow their integration with the objective of making comparative economic analysis of alternatives." ]

[ "Sevan Marine has let a contract to a unit of John Wood Group plc for the operation and management of the Sevan Stabilized Platform (SSP) Piranema, a floating production, storage, and offloading (FPSO) vessel. The FPSO will be operated for Petrobras in Piranema oil field off northeastern Brazil. The vessel will be the first implementation worldwide of Sevan Marine's SSP cylindrical monohull design. Piranema's design includes 30,000 bpd of oil process plant capacity, a gas injection plant with 3.6 million cu m/day of compression capacity, and 300,000 bbl of oil storage capacity. Piranema also can accommodate as many as 21 risers." ]

[ "A970" ]

[ "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "In 1998, Petrobras installed the first steel catenary riser on a P-18 semi-submersible platform, in Marlim Field, at 910 m water depth. It was decided to install a monitoring system to check the riser design methodology, including Vortex Induced Vibrations (VIV) Analysis. For VIV monitoring, the riser was instrumented with bottles with sophisticated accelerometers in different points, to measure accelerations at a rate of 2 Hz for 300 seconds every 3 hours. The other monitoring systems installed are the oceanographic buoy, to measure waves (height, period and direction), surface current (value and direction), wind, pressures, etc. and Acoustic Doppler Current Profiles (ADCP) to measure instantaneously the current (velocity and direction) along the water column. There is a positioning system (PETRONAV) consisting of GPS receiver with phase correction blended with inertial sensors by a Kalman Filter to measure platform precise absolute positions and movements. All these systems are synchronized to acquire data at the same period of time, to make possible the reanalysis with more reality. This paper describes the VIV monitoring system, including some eletronical system description and the methodology used to define the water depth of each bottle.", "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico.", "The P50 system is a Floating Production Storage and Offloading System under construction for future operation at Brazil's Campos Basin, in a water depth of approximately 1200 m. The system is based on a VLCC vessel, moored in DICAS (Differential Compliance Anchoring) system and presents a reasonably large riser porch on the portside for 77 lines. In this paper the dynamic behavior of the offshore system is evaluated using Dynasim, a time-domain simulation code for moored offshore systems, developed by the University of São Paulo and Petrobras. Simulations are compared with experimental results. Two kinds of tests were performed: \"Calibration\" tests were carried out in order to obtain static coefficients of the hull under isolated current and wind loads. \"Validation\" tests were conducted to evaluate the dynamic behavior under extreme environmental conditions combining current and wave excitation. First and second-order motions were measured as well as mooring line tensions for three different drafts of the ship. A generally good agreement was observed between numerical simulations and experimental results, reassuring the reliability of the numerical code.", "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "The Exploration and Production Department of Petrobras asked the R&D Center the development of a production system for 1800 m water depth, in Campos Basin, which would allow the installation of Steel Caterany Risers (SCR) in the starboard side of a production platform. The subsurface buoy concept was chosen as one of the alternatives. This concept has being developed since the preliminary studies conducted in the first phase of JIP Deepstar. This concept has an advantage of uncoupling the movements of the platform from the risers, reducing the loads due to the risers in the platform and allowing the installation of this system before the installation of the production vessel, anticipating the production of the field. This article shows the main characteristics of the buoy, its sizes, results of structural analyses and installation procedures for a buoy which sustains 14 SCR and 5 umbilicals in one side and 14 flexible jumpers and the same 5 umblicals in the opposite side. This concept was tested in two model test tanks, where it was verified that this concept is feasible. Also, information related to a field trial with a prototype installed in Brazilian waters will be presented.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "In order to develop new deep water fields using FPSO's, Petrobras has introduced several innovations to install 34 flexible risers individually connected to the Barracuda FPSO project. This paper provides an overview of design of the pull in and pull out operations. It also deals with I tube dimensions considering studies of interference during the risers transference from the chain table up to the risers connection deck. Additionally, new concepts have been proposed to solve the problem of Chain Table Interface to the pull in of flexible risers to floating production systems. The following advantages of this system which have been considered: Standardization of I tube inner diameters; Standardization of Bell mouth dimensions; Standardization of riser hang off systems; Standardization of flexible riser end fittings; Development of new philosophy of pull in and pull out operations; Considerable reduction in time of diver operations; Considerable reduction in time to change pull in main sheaves.", "As part of the ultra-deepwater field development of the Santos Basin, 300km offshore the Brazilian coast, the Sapinhoa and Lula NE pioneering riser system was successfully installed by Subsea 7, acting as a contractor for Petrobras and partners (BG E&P Brasil and Repsol Sinopec Brasil, in Sapinhoa Field, BG E&P Brasil and Petrogal Brasil, in Lula NE Field). The full Engineering, Procurement, Installation and Commissioning (EPIC) project scope comprises the design, fabrication and installation of 4 buoys of 2800 tons moored 250m subsurface, of which 2 connect to the Floating Production, Storage and Offloading unit (FPSO) Cidade de Sao Paulo and 2 to the FPSO Cidade de Paraty; 27 Steel Catenary Risers (SCRs) with 3.9km each, 27 Pipeline End Terminations (PLETs) and anchorage suction piles at 2140m water depth. This Buoy Supporting Risers (BSR) system concept presents several advantages to overcome the challenges of installing SCRs on ultra-deep waters, such as, allowing decoupling between installation of risers and the production unit, reducing payload on the unit, reduced risks associated with clashes and very small dynamics transmitted from production unit to the risers, resulting in significant less fatigue issues. Due to sour and C02 service requirements for the production and water injection risers, it was decided to use mechanically lined pipe for the entire line, with the exception of the top and touch down sections, where metallurgical clad (metclad) pipe was used. Consequently, a significant amount of qualification, testing and inspection associated to welding lined and metclad pipes was required. In order to install Corrosion Resistant Alloys (CRA) lined pipes with a Reel-Lay vessel, a novel methodology for water pressurized spooling and pipelay was developed to mitigate the risk of liner damage during installation. Full-scale pressurized spooling trials were done ahead of the pipelay campaign for testing and validation of this methodology. In addition, analyses were performed to evaluate the BSR system behaviour during SCRs installation and to minimize buoy de-ballasting interventions. This paper describes the faced challenges and solutions engineered in the steel catenary risers' fabrication and installation scopes.", "When Petrobras' Garoupa Field production tower collapsed last September 7, the company replaced it with a provisional early production system designed to restore production until permanent platforms and pipe lines could be installed. This provisional system uses the seafloor pipe line, meter, loading tower and processing ship (Presidente Prudente Moraes) remaining from the original production system. These holdovers were combined with a 208-ton, 12-m-dia. monobuoy, an electronics control ship (Star Offshore Services marine's Star Hercules and a specially designed pipe line and manifold. This contingency system handled more than 30,000 bopd production from Garoupa and Namorado Fields while Garoupa's permanent platform was readied." ]

[ "Creating an accurate subsurface model is paramount to many geophysical and geological workflows. Examples are background models for seismic inversion, rock property models for reservoir characterization, and geological models of depositional elements for seismic morphological interpretation. The standard workflow for creating subsurface models using seismic data is stratal slicing. The stratal slicing approach, however, may break down in the case of complex stratigraphic or tectonic structuring, such as shelf-to-basin clinoforms, delta lobe switching, deep-water channel-fan complexes, and deformation due to salt tectonics. This paper illustrates how the results obtained with high-resolution inversion and the incorporation of a stratigraphically consistent low-frequency model generated through horizon mapping - called the HorizonCube - improves the quality of the estimation of the subsurface parameters in structural complex settings. Using two data examples with different seismic data and geological settings from the North Sea and offshore Brazil, the paper will demonstrate the increased accuracy of the final inversion result using a data-driven HorizonCube." ]

[ "A1712" ]

[ "Changes in impact Coastal erosion and changes in sedimentation pose severe risks to coastal infrastructure, property, economic activities and ecological systems, and adaptation calls for significant investment. There is a tendency towards increasing damage from coastal erosion in specific locations that severely affects coastal socioeconomic activities and properties (Gopalakrishnan and others, 2016; Nguyen and others, 2018 ; Stronkhorst and others, 2018). The projection for risk and damage associated with coastal erosion and changes in sedimentation indicates that they are likely to increase in the future (Dunn and others, 2019). Ecosystem impacts from coastal erosion and changes in sedimentation can be substantial, in particular if there is a transformation from long-term accretion to erosion. Coastal wetlands are at significant risk, as many of them were developed during the relative mean sea level standstill of the late Holocene (Jones and others, 2019) and may not keep up with the rising seas in the future (Myers and others, 2019). Other geomorphic features sensitive to changing patterns of erosion and sedimentation include mangrove coasts, barrier coasts and small islands. There is a high risk of ecological disturbance for organisms that exclusively use the coastal zone for nesting or nurseries, with increased proliferation of human-occupied and modified shorelines also reducing the overall bioproductivity of the coastal zone (Rangel-Buitrago and others, 2018b). Major socioeconomic impacts will occur at locations where erosion coincides with high population density. Existing problems have been identified adjacent to the Ganges, Mekong, Yellow, Yangtze, Volta and Mississippi river deltas. For other parts of the coast, the management of erosion hazards through the use of engineering interventions requires longterm commitments to maintenance, including the cost of upgrading coastal defensive works, with potential risk to human safety and livelihoods if defences are subject to decline. Local sea level rise and storminess vary significantly between regions. Based on long-term satellite data, wave height shows an overall global increase (Young and Ribal, 2019), but large regional differences are reported, from large changes in the Southern Ocean to negligible effects in the North Sea (De Winter and others, 2012). Such spatial variations are likely to result in regional variations in erosion and sedimentation (Brown and others, 2016).", "This study aims to characterize the physical vulnerability of the western coast of Santa Catarina Island by applying the Smartline methodology. Erosion and flooding processes can endanger the installed human infrastructure in the coastal zone, with the degree of vulnerability of a given site being dependent on its natural characteristics, or even due to changes induced by human action. The methodology applied in this research adopts a multiscale approach and considers, using coastline segmentation, the specificities of the analyzed coastal sectors. Each identified segment receives a classification regarding its physical vulnerability, resulting from the integration of several attributes, which must be selected according to the coastal hazard that one wishes to represent. In the analysis, three distinct levels of physical support and behavior of the coastal processes are considered. The first-order attributes are structural, and their characteristics are broad; the second-order ones are transitional between structural and dynamic and, the third-order attributes are dynamic, with specific characteristics. The methodology was applied on the west coast of Santa Catarina Island, a sector sheltered from oceanic waves, characterizing a low energy environment. Eight descriptors were selected for erosion and coastal flooding, these being: “geology” having two classes, distributed along 12 segments and “geomorphology”, three classes in eight segments, both of which were considered first-order variables. “Average astronomical tide current speed” (five classes in 15 segments), “average backshore height” (four classes in 20 segments), and “degree of exposure to wind waves” (five classes in 28 segments) compose the second order, while “backshore features” (seven classes in 28 segments), “grain size” (five classes in 26 segments) and “beach face slope” (three classes in 30 segments) describe third-order processes. By the integration of first-order attributes an Indicative Map of Vulnerability to Erosion and Flooding was generated, which classified the coast into “very Low”, “low”, “moderate”, and “high” vulnerability classes. As a final result of the analytical process the coastline, first-, second-, and third-order attributes were mathematically integrated by means of spatial analysis techniques, with the studied coastline represented as a segmented line according to the different classes of attributed physical vulnerability, highlighting the sectors with the most propensity to erosion and flooding. This Map of Physical Vulnerability to Erosion and Flood indicated that the west coast of Santa Catarina Island can be divided into sectors of low and moderate vulnerability in similar proportions, with occasional occurrences of high vulnerability in specific sectors.", "Current climate changes have several consequences, such as rising sea levels. Today, the identification of coastal vulnerabilities worldwide is necessary to prevent impacts and drive action. The aim of the work was to estimate the vulnerable areas from a total rate of increase in sea level of 2.8 m and to identify the impacts of greater magnitude through the use of hierarchical analysis. The analytic hierarchy process method was used to list the most serious impacts. In addition, the simulation of the most vulnerable sites was carried out in a GIS environment using geoprocessing and a digital terrain model for the area of study. The Ilha Grande Bay region (southeastern Brazil) was chosen as a test area due to its economic, tourist and environmental importance. The main impacts are floods, coastal erosion and loss of coastal ecosystems. The most vulnerable areas are characterized as flat with low slopes, usually coastal plains occupied by environmental protection areas, urban centers and historical centers. The methodology proved to be effective in assessing and forecasting vulnerable areas and can be applied to several types of coastal areas.", "Impacts of climate change and related changes in the atmosphere Submarine cables Submarine cables have always been at risk of breaks from submarine landslides, mainly at the edge of the continental shelf. As the pattern of cyclones, hurricanes and typhoons changes, submarine areas that have so far been stable may become less so and thus produce submarine landslides and consequent cable breaks. With the increasing dependence of world trade on the Internet, such breaks (in addition to breaks from other causes, such as ship anchors and bottom trawling) could delay or interrupt communications vital to that trade. Eutrophication problems Where there are narrow continental shelves, some wind conditions can bring nutrientrich, oxygen-poor water up into coastal waters, and produce hypoxic (low-oxygen) or even anoxic conditions (the implications of which are described under theme F). Changes in ocean circulation appear to be enhancing those effects. Examples of this can be found on the western coasts of the American continent immediately north and south of the equator, the western coast of sub-Saharan Africa and the western coast of the Indian subcontinent. Opening of Arctic shipping routes Although the number of ships transiting Arctic waters is currently low, it has been escalating for the past decade, and the retreat of the polar sea ice as a result of planetary warming means that there are increasing possibilities for shipping traffic between the Atlantic and Pacific Oceans around the north of the American and Eurasian continents during the northern summer. The movement of species between the Pacific and the Atlantic demonstrates the scale of the potential impact. Those routes are shorter and may be more economic, but shipping brings with it increased risks of marine pollution both from acute disasters and chronic pollution and the potential introduction of invasive non-native species. The very low rate at which bacteria can break down spilled oil in polar conditions and the general low recovery rate of polar ecosystems mean that damage from such pollution would be very serious. Furthermore, the response and clear-up infrastructure found in other ocean basins is largely lacking today around the Arctic Ocean. Those factors would make such problems even worse. Over time, the increased commercial shipping traffic through the Arctic Ocean and the noise disturbance it creates may also displace marine mammals away from critical habitats.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "The present study deals with bioavailability of trace metals in the Doce river continental shelf, southeast of Brazil. The bottom sediments of the study area were firstly sampled a few weeks before the biggest environmental disaster of Brazil, the collapse of the Fundão dam in November of 2015. The disaster released around 40 Mm3 of iron ore tailings into Doce river basin and an estimate of 10 Mm3 reached the river delta, having the adjacent continental shelf as the final destination. One year and a half later, on April of 2017, the continental shelf was sampled again. A total of 48 stations were evaluated concerning concentrations of trace metals (Zn, Cu, Pb, Ni, Cr) and other ancillary variables before and after the accident. Trace metals were determined through fractionation in order to assess mobility and establish the ecological risk through RAC index. Before the accident, trace metals mobility was Pb > Ni > Cu > Zn > Cr, with Pb Cu, Ni and posing high ecological risk (RAC>30%) in many stations. Differences in concentrations of metal from pre to post accident were significant, and the increase of trace metals was observed. The mobility order after the accident changed to: Cu > Pb > Ni > Zn > Cr. Metal fractionation showed remarkable changes after the accident, with elements such as Cu, Ni and Zn highly associated with reducible fractions originated from the tailings composition. Despite the decrease of RAC to medium risk after the accident in most stations, the bioavilability of Cu, Pb, Ni and Zn increased as show by their higher accumulation in the bioavailable fractions.", "Currently, the Port of Santos is the largest in Latin America, and its access channel is in the process of deepening, intending to reach 17 m DHN as an ultimate goal. Specifically for the maritime bar section, which is now maintained only by dredging, a significant increase in the volume of maintenance dredging is expected. The current study applied the physical modelling to evaluate the effectiveness of two curved jetties in the maintenance of depth along the inlet entrance of Santos channel, its impact on the dispersion of the plume of effluents from the existing outfall and its influence on the beach adjacent to the proposed right jetty. As a result, the jetties’ layout could maintain the access channel’s depth with a much lower volume of dredging than the current maintenance requires. It was found that the increase of 1.2 km on the outfall’s original length would not only reduce the influence of the jetties’ presence, but also improve significantly the dispersion of effluents in comparison to the original situation. Moreover, the presence of the jetties induces a marine accretion that tends to protect the region adjacent to the inlet, which is currently suffering a severe erosion process. Finally, the study shows that it is completely feasible to adopt the curved jetties to transpose the Port of Santos’ maritime bar, which may be configured as an economic and attractive option to maintain depths of 17 m DHN.", "Passive margins underlain by a salt detachment are typically interpreted as kinematically linked zones of updip extension and downdip contraction separated by a zone of translation above a smoothly dipping base of salt. However, salt flow is affected by the base-of-salt geometry across which it flows, and early-stage gravity gliding induced by basin tilt may be complicated by the presence of salt-thickness changes caused by the pre-existing base-salt relief. We investigate these effects using physical models. Dip-parallel steps generate strike-slip fault zones separating domains of differential downslope translation and structural styles, provided the overburden is thin enough. If the overburden is thicker, it resists breakup, but a change in the structural trend occurs across the step. Steps with mild obliquity to the dip direction produce transtensional and transpressional faults in the cover separating structural domains. Deformation complexity in the overburden increases where base-salt steps strike at a high angle to salt flow, and it is especially dependent on the ratio between the thick (T) and thin (t) salt across the step at the base of salt. Where the salt-thickness ratio (T/t) is high, basal drag generates major flux mismatches, resulting in a contractional thickening of the salt and associated overburden shortening in thin salt above a base-salt high block. Shortening is transient and superseded by extension as the salt thickening allows the flow velocity to increase. When transitioning off a base-salt high block into a low block, the greater flux within the thick salt results in a monocline with extensional and contractional hinges. Structures are further deformed as they translate through these hinge zones. Our physical models demonstrate that extensional diapirs and compressional fold belts can be initiated anywhere on a slope as the salt accelerates and decelerates across base-salt relief. A fold belt from the Campos Basin, offshore Brazil, is used to illustrate these processes.", "The SCR (Steel Catenary Riser) was adopted by Petrobras as a cost-effective alternative for oil and gas export lines on deepwater fields, where large diameter flexible risers present technical and economic limitations. The SCR structures are subjected to several types of loads during their service life. These loads may be static or dynamic. When installed, the action of environmental phenomena like wind, current and sea waves on the floating unit, induces motions that will be transferred to the riser top connection. The random time domain dynamic analysis approach is considered to be more suitable to represent the loads and also die structural response due to the capability to represent existing non-linearities in the model. The sea-state spectra are treated by a time-simulation method, so fluid load non-linearity and fluid-structure interaction are well represented. Structural non-linearity, drag forces, fluid-structure relative velocity, and sea surface level variations are also taken into account. The fatigue damage calculation is directly related with stresses ranges composed along the whole structure service life. The load sets used in such analysis should be complete enough to represent all possible significant situations. This procedure results in a high computer time consuming necessary for several time-domain analyses, that is not compatible with a typical design schedule. Therefore, the load cases have to be reduced without lack of accuracy or safety. This paper presents the approach and methodology adopted in Petrobras to verify the SCR fatigue damage. The analysis performed and presented used the Petrobras's in-house computer codes ANFLEX and POSFAL, which were specially upgraded for this purpose." ]

[ "The marine environment brings both benefits and risks to human health, especially for people who live near it(see figure below; Depledge and others, 2013; Moore and others, 2013, 2014). Health has been defined as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity (World Health Organization-Regional Office for Europe (WHO-Europe), 1984). However, people live in an interdependent existence with the totality of the living world. Hence, human health cannot be separated from the health of our total planetary biodiversity and has now been redefined as the ability of a body to adapt to new threats and infirmities (Lancet-Editorial, 2009). The complex interactions between the seas and oceans and human health and well? being have been viewed primarily within a risk framework, for example, the adverse impacts of extreme weather, chemical pollution (from domestic and industrial effluents, aquaculture, offshore industries, air pollutants and road dust run-off, and black carbon in the Arctic) and, increasingly, climate change (Borja and others, 2020; Depledge and others, 2017, 2019; Fleming and others, 2019; Pleijel and others, 2013; Tornero and Hanke, 2016; Valotto and others, 2015; Walker and others, 2019; Winiger and others, 2019). However, new research is expanding our concept of the “health” of the “global ocean”, with a broader recognition of its essential and beneficial contribution to the current and future health and well?being of humankind (Borja and others, 2020; Depledge and others, 2019; Ercolano and others, 2019; Lindequist, 2016; see table below). The marine environment contributes significantly to human health through the provision and quality of the air we breathe, the food we eat, the water we drink and marine-derived pharmaceuticals, as well as providing health-enhancing economic and recreational opportunities (see chaps. 5 and 8A; Ercolano and others, 2019; Lindequist, 2016). The coastal environment can also have a calming effect (White and others, 2013) and provide important cultural benefits (see chap. 28, sect. 1.4). However, at the same time, the marine environment is under pressure from such human activities as transport, industrial processes, fishing, agricultural and waste management practices, climate change-related impacts associated with rising sea levels and coastal erosion, and biological invasions. The figure below summarizes the links between the degradation of the marine environment and human health. The assessment and management of the impacts on marine ecosystems and on human health resulting from the pressures on those ecosystems have largely been undertaken separately under the umbrella of different disciplines and, frequently, with little or no obvious collaborative interaction (Depledge and others, 2013; Moore and others, 2013, 2014). Consequently, many of our perceptions of the interactions between the marine environment and human health are limited and still relatively unchallenged, leaving an opportunity to address critical knowledge gaps to further inform science-based policies for the sustainable use of marine resources and environmental and human health protection (see figure below and Moore and others, 2014). The complex nature of the interactions between the marine environment and human health was reviewed by the European Marine Board (Moore and others, 2013, 2014) and others (Borja and others, 2020; Depledge and others, 2013, 2017, 2019; Fleming and others, 2014, 2019). The reviews have emphasized the need for an interdisciplinary approach to address all levels of organization, from genes to ecosystems. There are five key scientific challenges to improving our understanding of the linkages between the marine environment and human health (Galloway and others, 2017; Moore and others, 2014): To improve the measurement and monitoring of the distribution of marine pollutants, including algal toxins, nanoparticles as contributing factors to cardiovascular disease and lung cancer (Chang and others, 2020; Liu and others, 2016; Moore, 2020; Mossman and others, 2007; Numan and others, 2015; Stapleton, 2019), microparticles and plastic marine litter as a vector, as well as pathogens and non-indigenous species as potential health hazards at required time and spatial scales (Galil, 2018; Vezzulli and others, 2016); To improve knowledge of processes and models of the dynamics of transport and transformation in the environment of marine pollutants, pathogens and non-indigenous species that present health hazards; To improve the assessment of marine pollutant, pathogen and non-indigenous species health hazard exposure and risk to humans (Galil, 2018; Moore and others, 2013, 2014; Vezzulli and others, 2016); To understand the impacts of waste management activities on the marine environment and human health; To find explanations for the association between the marine environment and observed human health benefits, described as the “Blue Gym” effect (Depledge and Bird, 2009; Robinson and others, 2020; White and others, 2013; Wyles and others, 2019), including socioeconomic influences (Li and Zhu, 2006; Sachs and others, 2001)." ]

[ "B2144" ]

[ "There are a number of threats to human health arising from the marine environment that have now been identified: Increase in the spread of pathogens related to climate warming (e.g., Vibrio). Also, there is some evidence related to an increase in some harmful algal bloom species related to climate warming is some regions (Hinder and others, 2012; Vezzulli and others, 2016); Recently, non-indigenous species, sometimes called invasive alien species, have started to be considered as one of the major threats to global marine ecosystems through impacts on the ecosystems’ structure, function and services (Galil, 2018). A small number of poisonous or venomous marine non-indigenous species represent potential threats to human health. Intensification of anthropogenic activities, coupled with rapidly increasing coastal urbanization, drive complex and fundamental changes in coastal waters, including increases in alien species. Some of the alien venomous and poisonous species have attracted the attention of scientists, managers, the media and the public for their conspicuous human health impacts. In the Mediterranean alone, 10 non-indigenous species are considered human health hazards, running the gamut from nuisance to lethal (Galil, 2018). Human health hazards of non-indigenous species are expected to worsen as a result of climate change. The poleward influx of warm water biota enables them to spread to regions as yet uncolonized; A further, recently identified health threat is the potential role of plastic marine litter as a vector for opportunistic human pathogens and antibiotic-resistant microorganisms (Barboza and others, 2018; Harrison and others, 2018; Imran and others, 2019). Various pathogenic bacteria bind, in particular and strongly, to plastic litter (for example, Vibrio cholerae and some strains of Escherichia coli). Such human pathogens can colonize plastic surfaces in stable biofilms. The scientific and medical understanding of that health threat of plastic pollution is inadequate but the threat is dealt with as a further aspect of the problem of marine litter discussed in chapter 12. A severe problem could arise in areas that are highly polluted as a result of natural disasters, climate crises or occurring epidemics, or in conflict zones (Vethaak and Leslie, 2016; Keswani and others, 2016; Galloway and others, 2017; Leonard and others, 2018a, 2018b; Moore and others, 2014).", "Increasing inputs of harmful material Human health, food security and food safety Marine biotas are under many different pressures from hazardous substances on reproductive success. Dead zones and low-oxygen zones resulting from eutrophication and climate change can lead to systematic changes in the species structure at established fishing grounds. Either can reduce the extent to which fish and other species used as seafood will continue to reproduce at their historical rates. When those effects are combined with those of excessive fishing on specific stocks, there are risks that the traditional levels of the provision of food from the sea will not be maintained. In addition, heavy metals and other hazardous substances represent a direct threat to human health, particularly through the ingestion of contaminated food from the sea. The episode of mercury poisoning at Minamata, in Japan, is probably the most widely known event of that kind, and the reason why the global convention to address such problems is named after the town. There are places around the world where local action has been taken to prevent or discourage the consumption of contaminated fish and other seafood. In other places, monitoring suggests that levels of contamination dangerous for human health are being reached. In yet other places, there are inadequate monitoring systems to check on risks of that kind. Ensuring linkages between adequate systems for controlling the discharge and emissions of hazardous substances and the systems for controlling the quality of fish and other seafood available for human consumption is therefore an important issue. In the case of subsistence fishing, the most effective approach is to ensure that contamination does not occur in the first place. The lack of proper management of wastewater and human bodily wastes causes problems for human health, both directly through contact with water containing pathogens and through bacteriological contamination of food from the sea, and indirectly by creating the conditions in which algal blooms can produce toxins that infect seafood. Those problems are particularly significant in and near large and growing conurbations without proper sewage treatment systems, such as found in many places in developing countries.", "Integrated management of human activities affecting the ocean When various conclusions in parts III to VI of the present Assessment are linked together, they clearly show that a similar broadening of the context of management decisions will produce similar benefits in and among other sectors of human activities that affect the ocean. Examples of such interactions of pressures on the environment include: The lack of adequate sewage treatment in many large coastal conurbations, especially in developing countries, and other excessive inputs of nutrients (especially nitrogen) are producing direct adverse impacts on human health through microbial diseases as well as eutrophication problems. In many cases, they are creating harmful algal blooms, which are not only disrupting ecosystems, but also, as a consequence, damaging fisheries, especially small-scale fisheries and the related livelihoods and, in some cases, poisoning humans through algal toxins; Plastic marine debris results from the poor management of waste streams on land and at sea. There is a clear impact of such debris in its original form on megafauna (fish caught in “ghost” nets, seabirds with plastic bags around their necks, etc.) and on the aesthetic appearance of coasts (with potential impacts on tourism). Less obviously, impacts on zooplankton and filter-feeding species have also been demonstrated from the nanoparticles into which those plastics break down, with potentially serious effects all the way up the food web. Likewise, nanoparticles from titanium dioxide (the base of white pigments found in many waste streams) have been shown to react with the ultraviolet component of sunlight and to kill phytoplankton; Although much is being done to reduce pollution from ships, there is scope for more attention to the routes that ships choose and the effects of those routes in terms of noise, chronic oil pollution and operational discharges; The cumulative effects of excessive nutrient inputs from sewage and agriculture and the removal of herbivorous fish by overfishing can lead to excessive algal growth on coral reefs. Where coral reefs are a tourist attraction, such damage can undermine the tourist business; The ocean is acidifying rapidly and at an unprecedented rate in the Earth’s history. The impact of ocean acidification on marine species and food webs will affect major economic interests and could increasingly put food security at risk, particularly in regions especially dependent on seafood protein.", "Theme G Adverse impacts on marine ecosystems come from the cumulative impacts of a number of human activities. Ecosystems, and their biodiversity, that might be resilient to one form or intensity of impact can be much more severely affected by a combination of impacts: the total impact of several pressures on the same ecosystem often being much larger than the sum of the individual impacts. Where biodiversity has been altered, the resilience of ecosystems to other impacts, including climate change, is often reduced. Thus the cumulative impacts of activities that, in the past, seemed to be sustainable are resulting in major changes to some ecosystems and in a reduction in the ecosystem services that they provide. Theme H The distribution around the world of the benefits drawn from the ocean is still very uneven. In some fields, this unevenness is due to the natural distribution of resources in areas under the jurisdiction of the various States (for example, hydrocarbons, minerals and some fish stocks). The distribution of some benefits is becoming less skewed: for example, the consumption of fish per capita in some developing countries is growing; the balance between cargoes loaded and unloaded in the ports of developing countries is moving closer to those in developed countries in tonnage terms. In many fields, however, including some forms of tourism and the general trade in fish, an imbalance remains between the developed and developing parts of the world. Significant differences in capacities to manage sewage, pollution and habitats also create inequities. Gaps in capacity-building hamper less developed countries in taking advantage of what the ocean can offer them, as well as reduce their capability to address the factors that degrade the ocean.", "The global impact of poor water quality was examined in a study by the Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP) and WHO. Based on global estimates of the number of tourists who go swimming, and WHO estimates of the relative risks at various levels of contamination, the study estimated that bathing in polluted seas causes some 250 million cases of gastroenteritis and upper respiratory disease every year and that some of those people affected would be disabled over the longer term. Measured by adding up the total years of healthy life that are lost through disease, disability and death, the worldwide burden of disease incurred by bathing in contaminated seawater is some 400,000 disability-adjusted life-years (a standard measure of time lost owing to premature death and time spent disabled by disease), comparable to the global impacts of diphtheria and leprosy. GESAMP and WHO estimated that the cost to society, worldwide, amounted to about $1.6 billion per year (GESAMP, 2001). Furthermore, harmful or toxic algal blooms can induce serious neurological disease and also have major financial impacts (Bechard, 2020; Diaz and others, 2019). The most common pollutants tend to come from one of two places: humans or animals. Human faecal matter in water bodies constitutes the greatest public health threat because humans are reservoirs for many bacteria, parasites and viruses that are dangerous to other humans and can lead to a variety of illnesses. The cause of many problems can often be traced back to sewage overflows or leaky residential septic systems. Run-off from agricultural land can also represent a serious health concern, as faecal waste from farmed animals can contain pathogens, including various viruses, cryptosporidium, Escherichia coli and salmonella, while pet waste on beaches can also pose health threats to humans (Food and Agriculture Organization of the United Nations (FAO), 2017; Moore and others, 2014; Woods Hole Oceanographic Institution (WHOI), 2020). Exposure to contaminated seawater thus affects the health of those enjoying recreation by the sea and adversely affects coastal tourism and recreation. Drawing together the scientific work in the field, in 2003, WHO published Guidelines for Safe Recreational Water Environments: Coastal and Fresh Waters (WHO, 2003). More recently, WHO, with the support of the European Union, prepared recommendations on scientific, analytical and epidemiological developments relevant to the parameters for bathing-water quality, with special reference to Europe (WHO, 2018). WHO has indicated that the recommendations will inform the revision of the 2003 Guidelines (WHO, 2020). However, achievement of such standards requires adequate planning and infrastructure. Even where, as in some parts of India, strenuous efforts are being made to install properly operating sewage treatment systems, problems persist. For example, in Goa, a major tourist location, faecal coliform bacteria exceeded the relevant standards at all 10 of the beaches monitored (Goa State Pollution Control Board (GSPCB), 2019). The monitoring of bathing water will not achieve its aim of improving public health without improvements in the communication to the public of the findings so that they are readily understandable. The current European Union legislation on bathing water (European Union, 2006) provides for standardized ways of publicizing the results of the monitoring that is required. Similar systems are found in various Australian States (New South Wales Department of Planning, Industry and Environment (NSW-DPIE), 2020; South Australia Environment Protection Agency (SA-EPA), 2020) and in the United States (WHOI, 2020). Climate change may be influencing the prevalence of microbial infections (Deeb and others, 2018; Konrad and others, 2017). For example, increases in Vibrio vulnificus and Vibrio parahaemolyticus infections, both topical, and infections from ingesting seafood (oysters), have been described in relation to climate change, with rises in cases overall, as well as new cases found in high latitude areas that were previously not affected, as they are having more days over the minimum temperature threshold (Vezzulli and others, 2016).", "Ocean resources provide the main sources of livelihoods to millions of people across the globe, as well as a wide range of ecosystem services and benefits, including oxygen production, food provision, carbon storage, minerals, genetic resources and cultural and general life support services. However, the ecosystem services from marine and coastal ecosystems are deteriorating at an alarming rate, owing to several human pressures, including climate change. Human activities are directly or indirectly affecting ecosystem services and can thus reduce or erase benefits that would otherwise be provided. As human activities in the marine environment are expected to increase in the future, in particular in areas beyond national jurisdiction, not only will they exert growing pressure on natural resources, but they may also threaten marine biodiversity and therefore the benefits that people obtain from ecosystem services. International law as reflected in the United Nations Convention on the Law of the Sea plays a crucial role in the conservation and sustainable use of the ocean and its resources and in safeguarding the many ecosystem services that the ocean provides for both current and future generations. Actions and efforts should be primarily focused on implementation and regulatory gaps, especially in areas beyond national jurisdiction. That gives added significance to the current negotiations at the United Nations on the elaboration of an international legally binding instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological biodiversity of areas beyond national jurisdiction. The distribution around the world of the benefits drawn from the ocean is still very uneven. Efforts by less developed countries to take advantage of what the ocean can offer them are hampered by gaps in capacity-building and resource and financial constraints. Capacity-building, shared scientific knowledge and collaboration to develop and transfer innovative marine technology will empower States to fully participate in and benefit from the conservation and sustainable use of the ocean and its resources and assist them in meeting their obligations.", "human health risk (Chang and others, 2020; Galloway and others, 2017; Mossman and others, 2007; Numan and others, 2015; Sforzini and others, 2020; Smith and others, 2018; Stapleton, 2019; Stern and others, 2012; Vethaak and Leslie, 2016; Von Moos and others, 2012). Combustion nanoparticles are taken up into cells by endocytosis and accumulate in lysosomes, where overloading of the lysosomes results in membrane permeabilization, with resultant release of intralysosomal iron that causes oxidative cell injury leading to oxidative stress, with subsequent tissue and organ damage (Moore, 2020; Numan and others, 2015; Stern and others, 2012; Sforzini and others, 2020; Von Moos and others, 2012). There are now concerns that other nanoparticles including nano- and microplastics, may behave in a similar way (Boverhof and others, 2015; Von Moos and others, 2012). Shellfish are the major vector of illnesses caused by pathogens discharged to the sea. Oysters, for example, can concentrate such pathogens up to 99 times the level in their surrounding water (Burkhardt and Calci, 2000; Morris and Acheson, 2003; Motes and others, 1994; Vezzulli and others, 2016). The most common viral pathogens involved were norovirus (83.7 per cent) and the hepatitis A virus (12.8 per cent) (Bellou and others, 2013). No global database exists on outbreaks of illness of that kind. However, a survey of outbreaks reported between 1980 and 2012 found records of about 368 shellfish-borne viral outbreaks. The majority were located in East Asia, with more than half in Japan, followed by Europe, the Americas, Oceania and Africa. In addition to sewage-borne pathogens, toxins (e.g., yessotoxins, brevetoxins and ciguatoxins) can be produced by toxic algae (e.g., dinoflagellates), often at relatively low concentrations (e.g., 200 cells/l of Alexandrium spp.) and not necessarily restricted to algal blooms (see chap. 10 for causes of such blooms; and United States Centers for Disease Control and Prevention databases). Algal toxins can enter the food web and are often present in shellfish and fish where they can cause illness as a result of their consumption as human food. The health impacts of algal toxins are not limited to illnesses and deaths caused by poisoning, but also include health impacts from the loss of shellfish and other fisheries that have to be closed to protect people from poisoning, and the disruption of ecosystems caused by deaths of fish and top predators that ingest the algae or the toxins that they produce. Many toxic algal bloom events are reported annually, from all parts of the world, and the number is growing. The increased numbers are, in part, attributable to improved observation and recording, but there is reliable evidence demonstrating a real increase in the incidence of such problem blooms as a result of the interaction of many factors, including rising sea temperatures, increased inputs of nutrients to the ocean, the transfer of non-indigenous species by shipping, and changes in the balance of nutrients in the sea (Hinder and others, 2012). Health warning systems could be implemented in higher risk areas by involving not only the public health authorities, but also community planners, utility managers and designers. Effective monitoring and management programmes are, however, in place in some “at-risk” regions to prevent such toxins from being found in commercial seafood (Anderson, 2009; Anderson and others, 2001; see chap. 10). Such programmes are based on rigorous research on method development and validation, as well as the understanding of temporal and spatial patterns of toxic algae and knowledge of their transfer to humans. Toxic algal blooms are complex phenomena, and many different disciplines need to be involved in finding a way to address the problems they cause, ranging from molecular and cell biology to large-scale field surveys, numerical modelling and remote sensing (Intergovernmental Oceanographic Commission of the United Nations Educational, Scientific and Cultural Organization (UNESCO-IOC), 2017). Other biogenic toxins of health concern, which are not produced by algal blooms, include cyanotoxins produced by cyanobacteria, tetrodotoxins produced by symbiotic bacteria, which are used by metazoans as a defensive biotoxin to ward off predation or as both a defensive and predatory venom, and palytoxins, which are intense vasoconstrictors that pose risks to humans primarily through exposure to coral (Bane and others, 2014; Ramos and Vasconcelos, 2010; Zanchett and Oliveira-Filho, 2013). Humans who consume shellfish contaminated with brevetoxins, which are produced by some species of plankton, are at high risk of developing neurotoxic shellfish poisoning. There are also reports of skin ailments resulting from contact with brevetoxin-contaminated water and of respiratory illness from brevetoxin aerosols, in particular in vulnerable people with asthma (Hoagland and others, 2009). Shellfish metabolites of brevetoxin can also show different patterns of toxicity (Turner and others, 2015). Tetrodotoxins, produced by some species of bacteria, and ciguatoxins, produced by some species of plankton, can accumulate in fish and other seafood and are poisonous when consumed. Those types of biogenic toxins were previously associated with tropical waters but are now being found in temperate zones (Rodriguez and others, 2008; Silva and others, 2015a, 2015b). The social costs of all those illnesses can be huge, and the estimated costs related to illnesses from toxic algal blooms in just one single county in Florida, United States, amounted to between $0.5 million and $4.0 million (Hoagland and others, 2009).", "There are both health benefits and risks to living near the sea. The advantages can include enhanced air quality, exercise opportunities, novel marine-derived pharmaceuticals and ready access to food from the sea, which itself has health benefits (as a source of protein and essential micronutrients), although seafood is also traded inland; as well as sources of renewable energy. The ocean presents health risks from tsunamis, storms and tropical cyclones. Humans are also subject to increased risks from contaminated food from the sea, sea level rise and storms and cyclones from climate change. Chemical contaminants (including air pollution particulates), harmful or toxic algal blooms and pathogens pose health risks, in particular in estuarine and coastal waters where there is adjacent urbanization and/or recreational usage. Novel pollutants, such as antibiotics, hormones, nanomaterials (e.g., fullerenes, carbon nanotubes, metallic nanoparticles and nanoplastics) and microplastics, are a cause for concern. Combustion nanoparticles (e.g., PM2.5) as a major component of air pollution, are well established as contributing to cardiovascular disease and lung cancer.", "As of 2019, 153,434 marine benthic invertebrate species had been described globally. Since 2012, researchers have described 10,777 new marine benthic invertebrate species; at the same time, biodiversity is changing globally at rates unprecedented in human history, creating the potential for species extinction before they have been described. The deep sea covers 43 per cent of the Earth’s surface, with an estimated 95 per cent of marine invertebrate species still undescribed. Major pressures on marine invertebrates include temperature increase, ocean acidification, physical impacts on the seabed, the extraction of living and non-living resources, coastal use, invasive species and pollution. Large areas of the globe, including areas beyond national jurisdiction, still lack effective and adequate long-term ecosystem monitoring and protection for marine invertebrates. Despite new research regarding many important ecosystem processes, functions, goods and services, huge knowledge gaps remain in understanding the impact of reductions in benthic invertebrate biodiversity on human well-being and ecosystem dynamics.", "Human health can be affected by many aspects of food from the sea. Some problems are the result of pollutants (such as mercury) or pathogens (often from sewage and ballast water) discharged into the sea and taken up by plants, fish and shellfish that are harvested for human consumption (Takahashi and others, 2008). Others are the result of toxins generated by, or viruses found in, various biota in the sea and taken up by some fish and shellfish (see chaps. 10 and 11). According to WHO, mercury is one of the 10 most poisonous substances to human health (WHO, 2013). A principal form of mercury to which humans are exposed is organic methyl mercury (MeHg). The principal source of inorganic mercury in the sea is the burning of fossil fuels (see chap. 11). Such mercury is converted into MeHg by microbes in the aquatic environment, where it bioaccumulates in food webs. In humans, MeHg exposure occurs predominantly through the consumption of seafood. MeHg is a neurotoxin and is particularly harmful to fetal brain development. A large body of research has demonstrated a link between exposure to MeHg in the womb and developmental neurotoxicity (e.g., deficits in fine motor skills, language and memory) among populations that consume seafood regularly. A review of studies in 43 countries showed that pooled average biomarkers suggested an intake of MeHg that was: Several times above the Food and Agriculture Organization of the United Nations-WHO reference level for consumption in fish-consuming inhabitants of coasts and riverbanks living near small-scale gold-mining installations; Well over the reference level in consumers of marine mammals in Arctic regions; Approaching the reference level in coastal regions in South-East Asia, the western Pacific and the Mediterranean. Although the two former groups have a higher risk of neurotoxicity than the latter, the coastal regions of South-East Asia are home to very large populations. In all three areas, many of the samples showed levels of MeHg intake in excess of the reference value (Sheehan and others, 2014). Other experts, while recognizing the threat from MeHg, argue that it is important also to balance the benefits from fish-derived lipids with possible risks when considering fish as part of the diet of mothers and their children (Myers and others, 2015). Certain fish species have been identified as being at greater risk for MeHg exposure than others (e.g., MeHg biomagnifies in the aquatic food chain and larger predatory fish, such as shark, swordfish, king mackerel and certain species of tuna), so making appropriate choices in fish consumption can lead to increasing the benefits of eating seafood while decreasing the potential risk (Silbernagel and others, 2011)." ]

[ "The mobilization of existing data and the development of tools and open, global repositories provide a global picture of the diversity of marine fishes, with 17,762 known species, including 238 species described since the first World Ocean Assessment (United Nations, 2017e).While knowledge of the biodiversity of marine fishes exceeds that of many other marine taxa, further improvements will be necessary not only in taxonomic and biosystematic infrastructure but also in the exploration and characterization of the oceans to achieve a complete inventory.More than half of the known marine fish species have had their conservation status assessed by the International Union for Conservation of Nature (IUCN), and approximately a third of those assessments having been conducted since the first Assessment.Of the fish species with conservation assessments, around 6 per cent of bony fishes, nearly 50 per cent of elasmobranchs, 10 per cent of chimaeras and both species of coelacanths are threatened or near threatened with extinction.Capacity for documenting and understanding marine fish diversity continues to grow, but significant gaps remain for certain ecosystem groups (e.g., mesopelagic fishes) and in predicting responses to multiple simultaneous external stressors." ]

[ "B2354" ]

[ "The global biomass of marine fishes is approximately four times the total biomass of all birds and mammals (Bar-On and others, 2018), and fishes constitute an important part of marine biodiversity. Approximately 70 per cent of the marine fish biomass is comprised of mesopelagic fishes, although with wide estimate ranges, found in depths of 200–1,000 m (Irigoien and others, 2014, Hidalgo and Browman, 2019). Fishes occur throughout the world’s oceans and in a wide range of depths. For example, the fish seen alive at the greatest depth is the snailfish Pseudoliparis swirei, formally described in 2017 and found in depths greater than 8,000 m in the Mariana Trench in the Pacific Ocean (Linley and others, 2016, Gerringer and others, 2017). Fishes play a key role in marine food webs as both predators and prey, often moving through food webs over the course of their lifetimes, such as from planktonic larvae into predatory adults. Fish biodiversity varies between habitats. Habitat affiliations in the Fishbase biodiversity information system for 17,246 species (97 per cent of all known species) show that most bony fishes are demersal or reef-associated, while most species of sharks and rays, chimaeras and coelacanths are demersal or bathydemersal (see table 1). Fish biodiversity is changing, and fishes are sensitive to environmental changes caused by multiple external pressures (Comte and Olden, 2017) and to exploitation by fisheries (see chap. 15), which has important implications for human well-being (Food and Agriculture Organization of the United Nations (FAO), 2018). The first Assessment included chapters on the conservation challenges faced by the 1,088 species of sharks and other elasmobranchs (United Nations, 2017c) and the 25 species of tunas and billfishes (United Nations, 2017d). In addition, overall synthesis chapters revealed that fishes were among the best-known marine groups (United Nations, 2017a, b), with clear latitudinal and depth gradients in diversity. The mechanisms driving fish diversity are complex and include ecosystem stability and age, niche partitioning and predator-mediated dampening of dominance (Rabosky and others, 2018). Overexploitation and habitat loss and degradation were recently identified as major threats to marine fish biodiversity, and while the impacts of climate change have become more apparent, pollution was not considered a significant threat (Arthington and others, 2016). Subsequently, evidence has emerged that scientific assessment and effective fisheries management can reverse the effects of overexploitation, leading to increases in abundance on average for well-managed stocks constituting half of the reported global fish catch, although overexploitation remains a significant threat in regions with less-developed fisheries management (Hilborn and others, 2020). The impacts of climate change and thermal stress on marine fishes, in particular coral reef fish communities, have become more severe (Robinson and others, 2019), while novel threats, for instance microplastic pollution, are now also attracting increased research interest, even though considerable uncertainty remains about their population-level effects (Villarrubia-Gómez and others, 2018).", "Consider how dependent upon the ocean we are. The ocean is vast – it covers seven-tenths of the planet. On average, it is about 4,000 metres deep. It contains 1.3 billion cubic kilometres of water (97 per cent of all water on Earth). But there are now about seven billion people on Earth. So we each have just one-fifth of a cubic kilometre of ocean to provide us with all the services that we get from the ocean. That small, one-fifth of a cubic kilometre share produces half of the oxygen each of us breathes, all of the sea fish and other seafood that each of us eats. It is the ultimate source of all the freshwater that each of us will drink in our lifetimes. The ocean is a highway for ships that carry across the globe the exports and imports that we produce and consume. It contains the oil and gas deposits and minerals on and beneath the seafloor that we increasingly need to use. The submarine cables across the ocean floor carry 90 per cent of the electronic traffic on which our communications rely. Our energy supply will increasingly rely on wind, wave and tide power from the ocean. Large numbers of us take our holidays by the sea. That onefifth of a cubic kilometre will also suffer from the share of the sewage, garbage, spilled oil and industrial waste which we produce and which is put into the ocean every day. Demands on the ocean continue to rise: by the year 2050 it is estimated that there will be 10 billion people on Earth. So our share (or our children’s share) of the ocean will have shrunk to one-eighth of a cubic kilometre. That reduced share will still have to provide each of us with sufficient amounts of oxygen, food and water, while still receiving the pollution and waste for which we are all responsible. The ocean is also home to a rich diversity of plants and animals of all sizes – from the largest animals on the planet (the blue whales) to plankton that can only be seen with powerful microscopes. We use some of these directly, and many more contribute indirectly to our benefits from the ocean. Even those which have no connection whatever with us humans are part of the biodiversity whose value we have belatedly recognized. However, the relationships are reciprocal. We intentionally exploit many components of this biodiverse richness. Carelessly (for example, through inputs of waste) or unknowingly (for example, through ocean acidification from increased emissions of carbon dioxide), we are altering the circumstances in which these plants and animals live. All this is affecting their ability to thrive and, sometimes, even to survive. These impacts of humanity on the oceans are part of our legacy and our future. They will shape the future of the ocean and its biodiversity as an integral physical-biological system, and the ability of the ocean to provide the services which we use now and will increasingly need to use in the future. The ocean is vital to each of us and to human well-being overall.", "Ocean resources provide the basis for the livelihoods of millions of people across the globe, as well as a range of critical ecosystem services, including oxygen production and carbon storage, several biodiversity-related services, such as the harvesting of living resources, coastal protection and genetic resources (Mohammed, 2012) and cultural and amenity services (Whitmarsh, 2011). The most commonly valued services are tourism and recreation, as well as storm protection (Mehvar and others, 2018). Fisheries alone provide multiple benefits to millions of people, including those living in poverty in the coastal communities of low-income countries. Fishes and other seafood are a major source of food, protein and micronutrients for many vulnerable communities. It is estimated that, in 2016, 59.6 million people were employed in the primary sector of capture fisheries and aquaculture, with a great majority in low-income countries (although that figure includes some inland activities). With the addition of those who work in associated processing, marketing, distribution and supply industries, it is estimated that fisheries and aquaculture support nearly 250 million livelihoods (Food and Agriculture Organization of the United Nations (FAO), 2018). Benefits from marine and coastal ecosystems can be categorized in several ways. Traditionally, they have been understood in terms of goods (i.e., products, resources and harvests from nature with a market value), services (i.e., processes that sustain all forms of life but do not have a market value) and cultural benefits (i.e., spiritual and religious heritage, with no explicit market value). While goods have a direct use (consumptive) value, determined through market prices, services and cultural benefits have an indirect use (non-consumptive) value that can be determined through the application of a variety of valuation techniques (see figure). Provisioning services of marine and coastal ecosystems The ocean provides a multitude of direct and indirect benefits of value to humans. The most direct benefit that marine and coastal ecosystems provide is through their primary productivity and the resulting products, such as fishes, plants, animals, fuel, timber (e.g., mangroves), biochemicals, natural medicines, pharmaceuticals, raw materials (sand and corals) and, to a lesser extent, fresh water and fibre. In 2016, 79.3 million tons of marine fishes2 were caught, and 28.7 million tons of marine aquaculture species were farmed, supplying together an average of 14.6 kg of seafood per person on earth (FAO, 2018). Seafood is essential for food security: it provides more than 20 per cent of the average per capita animal protein intake for 3 billion people, and more than 50 per cent in some developing countries (FAO, 2018).", "As of 2019, 153,434 marine benthic invertebrate species had been described globally. Since 2012, researchers have described 10,777 new marine benthic invertebrate species; at the same time, biodiversity is changing globally at rates unprecedented in human history, creating the potential for species extinction before they have been described. The deep sea covers 43 per cent of the Earth’s surface, with an estimated 95 per cent of marine invertebrate species still undescribed. Major pressures on marine invertebrates include temperature increase, ocean acidification, physical impacts on the seabed, the extraction of living and non-living resources, coastal use, invasive species and pollution. Large areas of the globe, including areas beyond national jurisdiction, still lack effective and adequate long-term ecosystem monitoring and protection for marine invertebrates. Despite new research regarding many important ecosystem processes, functions, goods and services, huge knowledge gaps remain in understanding the impact of reductions in benthic invertebrate biodiversity on human well-being and ecosystem dynamics.", "Food from the sea represents the largest maritime industry in terms of the numbers of people involved. In 2017, the total first sale value of total production was estimated at $221 billion, of which $95 billion was from marine aquaculture production (including fish, shellfish and seaweed). Those figures include small proportions of production not used for food (FAO, 2019). Further details are given in chapter 15 on capture fisheries, chapter16 on aquaculture and chapter 17 on seaweed harvesting. The world fishing fleet consisted of about 4.5 million vessels in 2017, a number that has been relatively stable since 2008. Globally, just under one third of the fishing fleet is still composed of unpowered vessels, which reflects the large proportion of small-scale and subsistence fisheries. Only 2 per cent of the total fleet consists of vessels of 24 or more m in length overall, and about 36 per cent of vessels are less than 12 m in length overall (FAO, 2019). In 2017, an estimated 135 million people were involved in capture fisheries and marine aquaculture: some 120 million in capture fisheries and some 15 million in marine aquaculture. Employment in capture fisheries (as opposed to subsistence fishing) amounts to about 40.4 million, and employment in marine aquaculture is about 15.6 million. In addition, there is a slightly smaller workforce engaged in post-harvest processing. About 13 per cent of that employed workforce are women. Including subsistence fishing, about 50 per cent of those engaged in that group of activities are women (FAO, 2019; World Bank and others, 2012). There have been no recent surveys of death and injuries in the fishing industry. However, the most recent survey shows that those engaged in the industry suffer much higher levels of death and injury at work than in other industries: about 18–40 times higher than the average in a range of developed countries for which statistics were available (Petursdottir and others, 2001). Apart from subsistence fisheries, fisheries and aquaculture depend on substantive supply chains from producer to consumer. The problems caused by the COVID-19 pandemic are challenging fishing industries, especially in relation to international trade of products, and disrupting the supply chains. Fishing operations have also been affected, with effort reduced by an estimated 6.5 per cent in March and April 2020. In some areas (e.g., the MediterraneanandtheBlackSea), small-scalefisheries have been halted. In the future, COVID-19- compliant practices will lead to restrictions on working practices both on the water and in post-harvest handling (FAO, 2020).", "The major ocean currents connect geographic regions and also exert control on ocean life in other ways. Currents form natural boundaries that help define distinct habitats. Such boundaries may isolate different genetic strains of the same species as well as different species. Many marine animals (for example, salmon and squid) have migration patterns that rely upon transport in major ocean current systems, and other species rely on currents to distribute their larvae to new habitats. Populations of ocean species naturally fluctuate from year to year, and ocean currents often play a significant role. The survival of plankton, for example, is affected by where the currents carry them. Food supply varies as changing circulation and upwelling patterns lead to higher or lower nutrient concentrations. The heterogeneity of the oceans, its water masses, currents, ecological processes, geological history and seafloor morphology, have resulted in great variations in the spatial distribution of life. In short, biodiversity is not uniformly distributed across the oceans: there are local and regional biodiversity “hotspots” (see Chapters 33 and 35). Figure 3 shows a way in which the diversity of species is consequently distributed around the world. Various classification systems have been devised to systematize this variety, including the European Nature Information System (EUNIS) (Davies and Moss, 1999; Connor et al., 2004) and the Global Open Ocean and Deep Sea-habitats (GOODS) classification and its refinements (Agnostini 2008; Rice et al 2011)).", "Production and species Aquaculture is expanding faster than other types of food production, although no longer at the growth rates of the 1980s and 1990s (11.3 and 10.0 per cent, respectively, excluding aquatic plants). Average annual growth declined to 5.8 per cent during the period from 2000 to 2016, although higher rates of growth occurred in several countries, in particular in Africa, from 2006 to 2010 (Food and Agriculture Organization of the United Nations (FAO), 2018a). Global production in 2016 included 80 million tons of food fishes, 30.1 million tons of aquatic plants and 37,900 tons of non-food products. Food production included 54.1 million tons of finfishes, 17.1 million tons of molluscs, 7.9 million tons of crustaceans and 938,500 tons of other animals. China, the major aquaculture producer in 2016, has produced more than the rest of the world combined since 1991. The other major producers in 2016 were India, Indonesia, Viet Nam, Bangladesh, Egypt and Norway. Aquatic plants (28 million tons) included seaweeds and a much smaller volume of microalgae. China and Indonesia were the major producers of aquatic plants in 2016 (FAO, 2018b). Ornamental fish and plant species are not included in the present review. People and nutrition Global official statistics indicate that 59.6 million people were engaged in the primary sector of capture fisheries and aquaculture in 2016, with 19.3 million people engaged in aquaculture and 40.3 million in fisheries (FAO, 2018b). In addition to the primary producers, many people are engaged in the aquaculture value chain. The sector supports the livelihoods, including family members, of 540 million people, or 8 per cent of the world population (FAO, 2017a). Women accounted for 19 percent of all people directly engaged in the primary sector in 2014 (FAO, 2016). Aquaculture’s contribution to human nutrition has been fully recognized (Chan and others, 2017; High-Level Panel of Experts on Food Security and Nutrition, 2014). Aquaculture improves the nutrition of the rural poor, especially mothers and young children (Thilsted and others, 2016), although there are concerns that the growth of the sector and the intensification of its production methods may result in decreased availability of certain fatty acids and micronutrients (Bogard and others, 2017). Considering the increasing global population and the importance of a healthy diet, Béné and others (2016) stressed that access to fish is a key issue in creating healthy populations, especially among the rural poor, worldwide.", "Positive outlooks for fish biodiversity come from the evidence that individual fish populations respond positively to effective fisheries management (Hilborn and others, 2020) and that fish diversity and biomass increase within effective marine protected areas (Sala and Giakoumi, 2017). However, the global extinction of the smooth handfish Sympterichthys unipennis (Last and others, 2020) is a reminder that fish biodiversity continues to face significant threats as well. Both positive and negative outcomes are known because fishes continue to be among the most systematically studied and monitored components of marine ecosystems, mostly because of their economic value. Nonetheless, considerable fish diversity remains to be discovered: expert estimates indicate that at least another 700 fish species (approximately a 50 per cent increase over the number of currently known species) are yet to be described from the New Zealand exclusive economic zone and extended continental shelf alone (Gordon and others, 2010; Roberts and others, 2019). Further increase in capacity in taxonomy and biosystematics (Taxonomy Decadal Plan Working Group, 2018) and the integration of data from existing biodiversity collections (Nelson and others, 2015) and other sources (Edgar and others, 2016) would pave the way for more comprehensive, synthetic analyses of fish biodiversity over the near to medium term. In addition to improving our understanding of fish biodiversity, improved estimates of fish biomass are needed for some ocean zones, such as the pelagic zone. While it is estimated that mesopelagic fishes dominate global fish biomass, estimates of their biomass span several orders of magnitude and, therefore, the exact contribution that this group makes to global patterns remains poorly understood (Irigoien and others, 2014; Hidalgo and Browman, 2019). In addition, while there are no current estimates of species richness or biomass of bathypelagic fishes, which reside in the world’s largest environment (in terms of volume), it is highly likely that those fishes constitute a large portion of global fish biomass (Sutton and others, 2017). Since the first Assessment, the disposal of deep-sea mining water after ore removal has emerged as a significant threat to bathypelagic fishes (Drazen and others, 2019). Key knowledge and capacity gaps in fish biodiversity are summarized in table 5", "Distribution of ocean benefits and disbenefits Developments in employment and income from fisheries and aquaculture The global harvest of marine capture fisheries has expanded rapidly since the early 1950s and is currently estimated to be about 80 million tons a year. That harvest is estimated to have a first (gross) value on the order of 113 billion dollars. Although it is difficult to produce accurate employment statistics, estimates using a fairly narrow definition of employment have put the figure of those employed in fisheries and aquaculture at 58.3 million people (4.4 per cent of the estimated total of economically active people), of which 84 per cent are in Asia and 10 per cent in Africa. Women are estimated to account for more than 15 per cent of people employed in the fishery sector. Other estimates, probably taking into account a wider definition of employment, suggest that capture fisheries provide direct and indirect employment for at least 120 million persons worldwide. Small-scale fisheries employ more than 90 per cent of the world’s capture fishermen and fish workers, about half of whom are women. When all dependants of those taking full- or part-time employment in the full value chain and support industries (boatbuilding, gear construction, etc.) of fisheries and aquaculture are included, one estimate concludes that between 660 and 820 million persons have some economic or livelihood dependence on fish capture and culture and the subsequent direct value chain. No sound information appears to be available on the levels of death and injury of those engaged in capture fishing or aquaculture, but capture fishing is commonly characterized as a dangerous occupation. Over time, a striking shift has occurred in the operation and location of capture fisheries. In the 1950s, capture fisheries were largely undertaken by developed fishing States. Since then, developing countries have increased their share. As a broad illustration, in the 1950s, the southern hemisphere accounted for no more than 8 per cent of landed values. By the last decade, the southern hemisphere’s share had risen to 20 per cent. In 2012, international trade represented 37 per cent of the total fish production in value, with a total export value of 129 billion dollars, of which 70 billion dollars (58 per cent) was exports by developing countries. Aquaculture is responsible for the bulk of the production of seaweeds. Worldwide, reports show that 24.9 million tons was produced in 2012, valued at about 6 billion dollars. In addition, about 1 million tons of wild seaweed were harvested. Few data were found on international trade in seaweeds, but their culture is concentrated in countries where consumption of seaweeds is high.", "Distribution of ocean benefits and disbenefits Developments in fish and seafood consumption The Food and Agriculture Organization of the United Nations (FAO) estimates that total fish consumption, including all aquaculture and inland and marine capture fisheries, has been rising from 9.9 kg per capita in the 1960s to 19.2 kg per capita in 2012 — an average increase of 3.2 per cent a year over half a century. The distribution of consumption per capita varies considerably, from Africa and Latin America and the Caribbean (9.7 kg) to Asia (21.6 kg), North America (21.8), Europe (22.0 kg) and Oceania (25.4 kg). Marine capture fisheries represent 51 per cent and marine aquaculture 13 per cent of the total production of fish (154 million tons), of which 85 per cent is used for food. The annual consumption of fishery products per capita has grown steadily in developing regions (from 5.2 kg in 1961 to 17.0 kg in 2009) and low-income food-deficit countries (from 4.9 kg in 1961 to 10.1 kg in 2009). This is still considerably lower than in more developed regions, even though the gap is narrowing. A sizeable share of fish consumed in developed countries consists of imports and, owing to steady demand and declining domestic fishery production (down 22 per cent in the period 1992-2012), their dependence on imports, in particular from developing countries, is projected to grow. FAO estimates indicate that small-scale fisheries contribute about half of global fish catches. When considering catches destined for direct human consumption, the share contributed by the subsector increases, as small-scale fisheries generally make broader direct and indirect contributions to food security (through affordable fish) and employment for populations in developing countries. As well as direct consumption, many small-scale fishermen sell or barter their catch. It is doubtful that much of that trade is covered by official statistics. However, studies have shown that selling or trading even a portion of their catch represents as much as one third of the total income of subsistence fishermen in some low-income countries. Thus an increase in imports of fish by more developed countries from less developed countries has the potential to increase inequities in food security and nutrition, unless those considerations are taken into account in global trade arrangements." ]

[ "Cumulative impacts of human activities on marine biodiversity Ecosystems and habitats identified for special attention Considering specific types of important marine and coastal habitats, estuaries and deltas are categorized globally as in poor overall condition, based on published assessments of them for 101 regions. In 66 per cent of cases, their condition has worsened in recent years. There are around 4,500 large estuaries and deltas worldwide, of which about 10 per cent benefit from some level of environmental protection. About 0.4 per cent is protected as strict nature reserves or wilderness areas (categories Ia and Ib of the categories of protected areas as defined by the International Union for Conservation of Nature). Mangroves are being lost at the mean global rate of 1-2 per cent a year, although losses can be as high as 8 per cent a year in some countries. While the primary threat to mangroves is overexploitation of resources and the conversion of mangrove areas to other land uses, climate-change-induced sea-level rise is now identified as a global threat to them, especially in areas of growing human settlements and coastal development." ]

[ "B2296" ]

[ "Extreme weather events are likely to become more frequent in the 21st century bringing significant impacts to coastal ecosystems. However, the capacity to detect and measure those impacts are still limited, with effects largely unstudied. In June 2016, a hailstorm with wind gusts of over 100 km·h?1 caused an unprecedented mangrove dieback on Eastern Brazil. To quantify the scale of impact and short-term recovery of mangroves (15-mo), we used satellite imagery and field sampling to evaluate changes in forest structure in control and impacted areas after the hailstorm. Satellite imagery revealed mangrove dieback in over 500 ha, corresponding to 29.3% of the total forest area suddenly impacted after the hailstorm. Fifteen months after the hailstorm, some impacted areas show an initial recovery, while others continued to degrade. The El Niño years of 2014–2016 created mild drought conditions in Eastern Brazil. As observed in wetlands of semi-arid regions during the same period, mangrove recovery may have been impaired by continued physiological stress and climate change effects. Economic losses in the study site from typical mangrove ecosystem services including food provision, climate regulation, raw materials and nurseries are estimated to at least US$ 792,624 yr?1. This is the first evidence of an extreme weather impact on mangroves in Brazil that typically provide unique ecological and economic subsistence to coastal populations. Our results reveal that there is a pressing need for long-term monitoring and climate change adaptation actions for coastal wetlands in Brazil, and to provide broad estimates of ecosystem values associated with these ecosystems given many areas are already experiencing chronic stress from local impacts, drought and high temperatures.", "Some 90 per cent of mangrove, seagrass and marsh plant species have been assessed as being at risk of extinction; 19 per cent of mangroves, 21 per cent of seagrass species and one marsh plant species are on the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Among macroalgae, 1 species of red seaweed from Australia (Vanvoorstia bennettiana) is listed as Extinct, 10 species (six red algae and four brown algae) are listed as Critically Endangered, 1 species of brown alga is listed as Endangered, and 4 species (three red algae and one brown alga) are listed as Vulnerable. The number of macroalgal species assessed and reported in the IUCN Red List is less than 1 per cent of the total number of species listed in the Ocean Biodiversity Information System (OBIS). All 15 threatened species are endemic to the Galapagos Islands, and 47 species have been assessed as at a risk of extinction in the Mediterranean. This highlights the knowledge gap with regard to macroalgae. In terms of macroalgal endemism, Antarctica ranks highest, with 27 per cent endemics, followed by South America (22 per cent) and the Red Sea Large Marine Ecosystem (9 per cent). New techniques such as genomics have been developed for species identification and for elucidating phylogenetic relationships. As a result, the number of species is expected to rise, especially for macroalgae; however, owing to uneven human and infrastructure capacities among regions, some regions will be less studied than others.", "In South America, Brazil is the country with the largest extension of mangroves, covering approximately 7000 km, departing from the Oiapoque River, on the border between Amapá and French Guiana, to Praia do Sonho, in Santa Catarina. With population growth, there was an expansion of cities towards the coast and with them the development of agriculture and aquaculture. With the advent of remote sensors, the changes detected over the years in the extensive area of ?mangroves in Brazil and in the world, have been studied and quantified. In this context, the objective of this work was to evaluate the transformations occurred in the mangrove in a semiarid climate estuary and to quantify the losses and gains of areas, influenced by both natural and anthropic action. The mangrove of the Coreaú River estuary has undergone small and significant transformations over the past 28 years (1985-2013). There was an increase of 3% (7.17 km²) in 2013 compared to 1985, these transformations consisted of a 55% gain in mangrove area, due to the addition of muddy sediment, development of mangrove forest and regeneration of mangrove forests after the deactivation of the shrimp farms, and 45% loss, corresponding 38% to the natural loss of muddy material, due to the growth of apicum area, influence of wind, rain, flow and tides, and loss of 7%, related to anthropic action, represented by the shrimp farm and salt pans, built along the estuary. From the processing of optical images it was possible to identify the share of influence of these transformations (natural and artificial) near the mangrove and in which intervals of years there were the biggest or smallest changes.", "Mangroves are productive ecosystems of tropical coastal landscapes, constituting habitat for many commercial fisheries, as the crab Ucides cordatus. In Brazil this crab holds a major socio-economic importance for artisanal fishery, but with obvious decline on their productivity. In this study we determined and mapped the more suitable mangrove areas for the conservation and fishery of this crab in the São Francisco River Estuary (Northeastern Brazil). We applied a Multi-Criteria Evaluation (MCE) in a GIS environment. Ten criteria in total were used, including crab biotic parameters, land use/cover and social factors. Maps of each criterion were produced by GIS techniques with CBERS and SPOT images and by field data. Mangroves more suitable for the conservation of U. cordatus (9.4 km2) are near to the river mouth, due to high density and frequency of non-commercial size crabs (NCSC), low density of commercial size crabs (CSC), small crabs and low degree of use for fishery. On the other hand, the mangroves for the crab fishery occurred with a similar area (10.2 km2) located farther away from the river mouth, with a high density and frequency of CSC, low density of NCSC, big crabs, medium-high degree of use for fishery and near to the villages. These information and thematic maps can aid government agencies in delineating extractive and fishery exclusion areas, thus contributing to the management plan for this species.", "While environmental drivers regulate the structure of mangrove microbial communities, their exact nature and the extent of their influence require further elucidation. By means of 16S rRNA gene-based sequencing, we determined the microbial taxonomic profiles of mangroves in the subtropical Paranaguá Bay, Brazil, considering as potential drivers: salinity, as represented by two sectors in the extremes of a salinity gradient (30 PSU); proximity to/absence of the prevailing plants, Avicennia schaueriana, Laguncularia racemosa, Rhizophora mangle, and Spartina alterniflora; and the chemical composition of the sediments. Salinity levels within the estuary had the strongest influence on microbial structure, and pH was important to separate two communities within the high salinity environment. About one fourth of the total variation in community structure resulted from covariation of salinity and the overall chemical composition, which might indicate that the chemical profile was also related to salinity. The most prevalent bacterial phyla associated with the mangrove soils analyzed included Proteobacteria, Actinobacteria, Chloroflexi, Bacteroidetes, Acidobacteria, and Cyanobacteria. Taxonomic and functional comparisons of our results for whole-genome sequencing with available data from other biomes showed that the studied microbiomes cluster first according to biome type, then to matrix type and salinity status. Metabolic functions were more conserved than organisms within mangroves and across all biomes, indicating that core functions are preserved in any of the given conditions regardless of the specific organisms harboring them.", "The coastal zone, where most of the Brazilian population lives, plays a central role for discussing vulnerability and adaptation strategies to climate change. Besides saltmarshes, mangroves and coral reefs, this region also presents seagrass beds, macroalgae and rhodolith beds, forming underwater forests, which are key habitats for services such as biodiversity conservation, O2 production, and absorption of part of the CO2 from the atmosphere. Science endorses that ocean warming and acidification, sea level rise, biological invasions and their interactions with pollution, overfishing, and other stressors undermine the structure and functioning of these ecosystems, thus increasing the region's socio-environmental vulnerability. Ecosystem conservation, management and potential bioremediation/restoration using science-based solutions must be prioritized in order to reduce the vulnerability of coastal communities and the ocean.", "There are a number of threats to human health arising from the marine environment that have now been identified: Increase in the spread of pathogens related to climate warming (e.g., Vibrio). Also, there is some evidence related to an increase in some harmful algal bloom species related to climate warming is some regions (Hinder and others, 2012; Vezzulli and others, 2016); Recently, non-indigenous species, sometimes called invasive alien species, have started to be considered as one of the major threats to global marine ecosystems through impacts on the ecosystems’ structure, function and services (Galil, 2018). A small number of poisonous or venomous marine non-indigenous species represent potential threats to human health. Intensification of anthropogenic activities, coupled with rapidly increasing coastal urbanization, drive complex and fundamental changes in coastal waters, including increases in alien species. Some of the alien venomous and poisonous species have attracted the attention of scientists, managers, the media and the public for their conspicuous human health impacts. In the Mediterranean alone, 10 non-indigenous species are considered human health hazards, running the gamut from nuisance to lethal (Galil, 2018). Human health hazards of non-indigenous species are expected to worsen as a result of climate change. The poleward influx of warm water biota enables them to spread to regions as yet uncolonized; A further, recently identified health threat is the potential role of plastic marine litter as a vector for opportunistic human pathogens and antibiotic-resistant microorganisms (Barboza and others, 2018; Harrison and others, 2018; Imran and others, 2019). Various pathogenic bacteria bind, in particular and strongly, to plastic litter (for example, Vibrio cholerae and some strains of Escherichia coli). Such human pathogens can colonize plastic surfaces in stable biofilms. The scientific and medical understanding of that health threat of plastic pollution is inadequate but the threat is dealt with as a further aspect of the problem of marine litter discussed in chapter 12. A severe problem could arise in areas that are highly polluted as a result of natural disasters, climate crises or occurring epidemics, or in conflict zones (Vethaak and Leslie, 2016; Keswani and others, 2016; Galloway and others, 2017; Leonard and others, 2018a, 2018b; Moore and others, 2014).", "Cumulative impacts of human activities on marine biodiversity Marine mammals, marine reptiles, seabirds, sharks, tuna and billfis Cumulative effects are comparatively well documented for species groups of the top predators in the ocean, including marine mammals, seabirds and marine reptiles. Many of those species tend to be highly mobile and some migrate across multiple ecosystems and even entire ocean basins, so that they can be exposed to many threats in their annual cycle. Some of those species are the subject of direct harvesting, particularly some pinnipeds (seals and related species) and seabirds, and by-catch in fisheries can be a significant mortality source for many species. However, in addition to having to sustain the impact of those direct deaths, all of those species suffer from varying levels of exposure to pollution from land-based sources and increasing levels of noise in the ocean. Land-nesting seabirds, marine turtles and pinnipeds also face habitat disturbance, such as through the introduction of invasive predators on isolated breeding islands, the disturbance of beaches where eggs are laid or direct human disturbance from tourism, including ecotourism. Some global measures have been helpful in addressing specific sources of mortality, such as the global moratorium on all large-scale pelagic drift-net fishing called for by the General Assembly in 1991, which was a major step in limiting the by-catch of several marine mammal and seabird species that were especially vulnerable to entanglement. However, for seabirds alone, at least 10 different pressures have been identified that can affect a single population throughout its annual cycle, with efforts to mitigate one pressure sometimes increasing vulnerability to others. Because of the complexity of those issues, conservation and management must therefore be approached with care and alertness to the nature of the interactions among the many human interests, the needs of the animals and their role in marine ecosystems.", "Purpose: In order to assess the impact of anthropogenic activities on carbon and nutrient accumulation, total organic carbon (TOC), nitrogen (TN), and phosphorus (TP) accumulation rates were examined in a 210Pb-dated mangrove sediment core from Sepetiba Bay, Brazil, a coastal region impacted by multiple environmental changes during the previous century. Materials and methods: A 50-cm length sediment core was collected from a mangrove forest in Sepetiba Bay. Sediment subsamples were analyzed to measure TOC, TN, ?13C, and ?15N using an elemental analyzer attached to an isotope ratio mass spectrometer Thermo Finnigan Model Delta Plus XP, whereas colorimetric analysis were used to measure TP. For 210Pbex analyses, gamma-ray measurements were performed in a semiplanar intrinsic germanium high purity coaxial detector, coupled to a multichannel analyzer, whereas the sediment accumulation rate (SAR) was calculated according to the constant initial concentration (CIC) method. Also, carbon and nutrient fluxes were calculated using SAR and TOC, TN, and TP contents, whereas statistical differences were evaluated by ANOVA + Tukey HSD analysis with previous data normalization. Results and discussion: The calculated sedimentation rate (~ 8.1 mm year?1) since the early 1900s was up to threefold higher than the global mean determined for mangrove forests (~ 2.8 mm year?1) and the regional sea level rise (~ 3.2 mm year?1). Significantly higher TOC, TN, and TP fluxes, up to nearly 1000, 90, and 15 g m?2 year?1, respectively, were observed after the water diversion from a nearby drainage basin in the 1950s and an increase in sewage effluent input, which increased in the early 1990s. After this period, lighter ?13C values (~ ? 25‰) indicate an increased importance of the terrestrial organic matter source, while lower TOC:TN ratios (~ 11) and heavier ?15N values (~ + 9‰) suggest an increased influence of anthropogenic fertilization on inorganic nitrogen accumulation. Conclusions: The significantly higher accumulation rates during the last decades evidenced the role of mangrove sediments as sinks for anthropogenically enhanced inputs of carbon and nutrients. Also, studies on carbon and nutrient accumulation evidenced the need for further research in eutrophic coastal areas.", "Higher mortality and less successful reproduction of marine biotas Levels of by-catch (non-target fish, marine mammals, reptiles and seabirds), discards and waste Current estimates of the number of overfished stocks do not take into account the broader effects of fishing on marine ecosystems and their productivity. In the past, large numbers of dolphins drowned in fishing nets. This mortality greatly reduced the abundance of several dolphin species in the latter half of the twentieth century. Thanks to international efforts, fishing methods have changed and the by-catch has been reduced significantly. Commercial fisheries are the most serious pressure at sea that the world’s seabirds face, although there is evidence of some reductions of by-catch in some key fisheries. Each year, incidental by-catch in longline fisheries is estimated to kill at least 160,000 albatrosses and petrels, mainly in the southern hemisphere. For marine reptiles, a threat assessment scored fishery by-catch as the highest threat across marine turtle subpopulations, followed by harvesting (that is, for human consumption) and coastal development. The mitigation of those causes of mortality can be effective, even though the lack of reliable data can hamper the targeting of mitigation measures. Depending on the particular species and fishery methods, mitigation may include the use of acoustic deterrents, gear modifications, time or area closures and gear switching (for example, from gillnets to hooks and lines). In particular, the global moratorium on all large-scale pelagic drift-net fishing called for by the General Assembly in 1991 was a major step in limiting the by-catch of several marine mammal and seabird species that were especially vulnerable to entanglement." ]

[ "The feasibility of the construction of concrete platforms for deep water locations (130 m) offshore Brazil, was investigated. A large depth of water is not available near the coast in Brazil, and a construction method was devised to overcome this difficulty. The design incorporates storage tanks and is less costly than a steel structure." ]

[ "A1836" ]

[ "During basic design development for new FPSO projects in Brazilian pre-salt exploration, digital technologies were employed, in order to achieve constructability design requirements, construction and commissioning specification checks. Due to its benefit cost, schedule, quality, and overall project objectives and deep influence in platform safety and operability, in a process explained in Figure 1. Those digital technologies, such as the use of databases, computer aided engineering (CAE), analysis tools, 3D simulations and consistency check, were identified in constructability reviews and were developed to achieve the best constructability procedures and solve construction inconsistencies between several involved disciplines in posterior detailed design, procurement and commissioning phases. This manuscript aims to present the use of digital technologies to support constructability analysis in offshore oil & gas production facility - surface installations - projects of Petrobras.", "This paper shows work performed through a Joint Industry Project (JIP), aimed to enable repairs made from composite materials to be applied to metallic structural components of offshore platforms in general and FPSOs in particular. The basic motivation was to provide a repair methodology that would cause a reduced impact to platform operations, particularly in classified areas. The focus on FPSOs derived from the fact that most of them are converted tankers, originally designed for overhauling in suitable docks from time to time. That is no longer possible once they are deployed as floating platforms, intended to stay in place for twenty years or more. An important prerequisite was that the repair procedure had necessarily to have the approval of the Classification Society of the platform. The project was conducted in three phases. The objective of the first phase was to develop a qualification procedure for the repair of relevant defects with adhesive patches and to demonstrate its feasibility with simple examples. Along phase two a Project Recommended Practice for Patch Repair was issued and more qualification tests were performed. Phase three consisted of a practical application of the Recommended Practice, accomplished within Petrobras by a repair at a ballast tank of the production semisubmersible platform P-20, in operation at Campos basin. The repair was accomplished by means of carbon fiber reinforcements within a vinylester matrix. This paper describes the P-20 repair case and the design of the bonded repair. A brief overview is presented of the installation of the repair, quality assurance issues and needs for future follow-up. The experimental and theoretical studies performed in support of the repair trial are briefly described. The successful repair trial demonstrates the utility of bonded repairs in managing the integrity of offshore steel structure assets.", "This work discusses soil-structure interaction applied to thermal snaking of shallowly buried pipelines embedded in very soft clay. The main motivation of this research was the accident that occurred in January 2000 in Rio de Janeiro where more than 1 million liters of crude oil has been spilled into the Guanabara Bay. In that way, a set of comprehensive centrifuge tests has been undertaken in order to assess the lateral resistance of the soil. The results were compared with numerical simulations of the same centrifuge scenarios using a software developed by PETROBRAS.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "ULTRA™ is a novel and advanced flow assurance coating technology recently introduced in the Brazilian market for upcoming, and challenging, offshore projects expected in the next years. This coating technology has been used for over 9 years, and has been designed, applied and installed in offshore projects worldwide. Particularly over the last year, this thermal insulation system has been applied for a major project in Brazil. It is a thermal insulation system composed of fusion bonded epoxy and styrenic materials. A base 3-layer coating, followed by one or more insulation layers of solid or foamed styrene, and a high ductility outer shield were engineered to outperform some of existing solutions in terms of hydrostatic pressure, subsea stability, overall insulation thickness and associated installation costs. Application trials have been successfully performed to validate plant capabilities for applying the wide range of styrene-based system solutions, for shallow and deep waters. Test results demonstrated that foam and solid versions have a sweet spot in which the system outperforms similar to the wet insulation solutions existing in the Brazilian market. Its solid and foam systems demonstrated capability of delivering lower U - values (Overall Heat Transfer Coefficient) due to their lower thermal conductivity. The benefit of lower thermal conductivity is reflected in a reduced coating thickness and opportunities for potential savings during the transportation and installation activities. In the coming years, the offshore industry in Brazil will demand wet insulation systems delivering improved thermal performance. Hence, lower U value with lower CAPEX and in deeper water depths. This insulation system is a proven flow assurance coating technology, addressing those challenges and now available in the Brazilian market.", "Shallow and insufficient soil support may lead to upheavel buckling of heated pipelines in shores approach areas. This article presents a nume rical model to simulate the thermomechanical buckling of buried heated pipelines in shore approach areas. An analysis adopting geometrical, physical, and operational data is also carried out for a particular Petrobras project, taking in situ geophysical survey, geotechnical, and oceanographic information into account. The discussion also addresses the influence of the sediment transport after the opening of the trench and required backfilling with a heavier soil.", "The Santos Basin Pre-Salt Cluster (SBPSC), Offshore Southeast Brazil, is a unique scenario, posing great development challenges. The microbial carbonate reservoir is unusual regarding its origin and petrophysical properties; the fluids have a variable CO2 content; the few analogue reservoirs around the world do not compare in terms of volumes, water depth and distance to the coast; and there are also flow assurance issues. Considering the importance of these reserves for the Brazilian economy and the opportunity to accelerate cash flow, Petrobras and its partners have opted for a fast track development, including extended well tests (EWTs) and production pilots. The current Petrobras Business Plan (2011-15) foresees mat the SBPSC areas alone will produce over 500,000 boe/d in 2015 and over 1,100,000 boe/d in 2020. These numbers refer only to Petrobras share and do not include me transfer of rights with economic compensation from the Brazilian government to Petrobras. Therefore, the initial development phase will have to cope with several uncertainties, mainly the subsurface ones. Some of the most relevant are the quality and the heterogeneity degree of each reservoir zone; the compositional grading of the fluids; the performance of different EOR methods; and the presence of fractures affecting the flow. How to specify and anticipate the acquisition of expensive equipment, such as FPSOs and subsea devices, with uncertainties to be clarified? When is it worth to invest in more data acquisition, such as EWTs, core and fluid sampling, extensive lab analysis or even more appraisal wells? The timing and the uncertainty reduction foreseen for each initiative must be taken into account. On the other hand, when is it better to pay for extra flexibilities, accepting the inevitable CAPEX increase? Some examples would be: smart completions and possibility to inject different chemical products in the wells; gas and water separated lines for each satellite injector; flexible subsea layout, allowing multiples strategies and the addition of more wells; FPSO plants designed to inject desulphated water, or to export, import or reinject me gas, and also to separate variable CO2 contents in the produced fluids. This paper aims to discuss the influence of the main subsurface uncertainties in the selection of alternatives to develop the giant fields in the SBPSC, in a fast track way.", "Cottonwood is the first field development in deepwater Gulf of Mexico operated by Petrobras. It consists of three subsea wells in water depths of 670m (2,200 ft). Two wells presently produce gas-condensate, with high wax deposition potential. The wells are connected to a fixed platform in East Cameron 373 Block, 27.2 km (17 miles) away, through a piggable loop with flowlines of 15.2 cm (6?) nominal and 12.2 cm (4.8?) ID. During a pigging procedure in December 2007, a rigid, 12.9 cm (5.1?) elastomer pig got trapped halfway in the East segment of the loop, after traveling through the West segment. In front of the pig a slug of paraffin was formed and impeded its passage. During two years the production continued through the still open West segment of the production flowline. A wax mitigation plan was implemented, consisting of continuous paraffin dispersant injection. Meanwhile, low-cost, advanced technology-based methods to remove the obstruction were pursued, as an alternative to the high-cost whole or partial East flowline substitution. The procedures attempted were, first, the controlled pressurization of the flowline, second, the application of associated vibration and pressurization. These methods, along with paraffin solvent soaking procedures, helped to release the pig in February 2010, making both segments available for production. However, a layer of wax was formed inside the flowline loop and pig fragments might still be present in the East segment. A cleaning operation was performed to further clean both flowline segments. The operation consisted of injecting sea water mixed with a dispersant, an approach, to our best knowledge, not attempted before in such a long subsea tie-back. The formulations used were thoroughly laboratory tested. The operation demanded noticeable logistics planning and execution, due to the flowline volume (4000 bbl) and the number of volumes circulated (circa of 10). The operation was a success, thereby allowing the restoration of production with full flowline diameter availability and the resumption of routine pigging of the loop.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "ABS has secured the industry's first contract for an integrated, risk-based inspection (RBI) program for an offshore floating structure. The contract comes from Petrobras for its P35 floating production/offloading and storage facility (FPSO) operating in the Campos Basin. ABS will execute the project in phases." ]

[ "Petrobras has indulged in R&D programs and technology partnerships with key contractors, opening up offshore development opportunities within Brazil. One of the main contractors helping Petrobras to achieve its goals on Marlim is FMC Technologies Inc. The subsea separation, pumping, and water reinjection system will be installed in 899 m water depth to meet the challenge of increased water production. Petrobras has awarded FMC an additional subsea separation and boosting system contract for the brownfield Congro and Corvina development, also in the Campos basin. Petrobras has recently completed its successful Procap 3000 research program, which was a driver for many of the operator's deepwater advances. In the Future Vision Procap program, the company is laying emphasis on the pursuit of solutions that could significantly alter current standards for developing deepwater fields." ]

[ "A230" ]

[ "The objective of this paper is to present how Petrobras is successfully managing production losses due to mineral scale formation in subsea production wells from its biggest offshore field1. Marlim Field, discovered in 1985 with a STOIIP estimated at 1,012 million STD m3 (6,369 million STB) and a field area of 146 km2 is located in water depths ranging from 600 m to 1100 m.Current Marlim Field production, around 446,754 bpd is supported by injecting 761,971 bpd of sea water. The water production is 217,150 bpd (water cut = 32%) and GOR is 82 STDm3/STDm3. A total of 117 wells are on operation, with 73 producers and 44 water injectors. The field was developed using subsea completion through the vertical, deviated and horizontal wells, equipped with cased hole and open hole gravel packed screens. Scale formation has occurred as a consequence of the incompatibility between the barium and strontium present in formation water and the high amount of sulfate in the injected seawater. To avoid production losses a plan of water management was implemented, including frequent produced water chemical analyses to investigate the convenience for applying a chemical bullhead treatment to remove scale in the production wells (tubing, screen, gravel pack and near well bore)2,3,4. This paper presents results from dissolver treatments performed in the field and also from a special investigation using a rig in a horizontal well. Valuable information was obtained in this intervention, clearing up the scaling occurrence phenomena in this scenario, allowing therefore an improvement on productivity recovery of the wells.", "Petrobras has almost 30yr experience of developing oil and gas resources offshore Brazil. Most important is the company's success in developing technologies for deepwater production systems in the Campos Basin. These technological challenges and developments are described together with specific development programmes for the deepwater Albacora and Marlim oilfields.", "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008.", "US subsea engineer Global Industries has received a letter of intent from Petrobras to install the 24-in. Camarupim gas pipeline in the Espirito Santo Basin offshore Brazil. The project, valued at ? $165 million, includes project planning, detailed engineering, and installation of 52 km of pipeline, and fabrication and installation of the pipeline-end manifold and tie-in spool. The offshore installation will be performed by Global's pipelay barge Iroquois.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "In 2004, after a cycle of 11 yr in which the annual increase in crude oil production was 8.6% avg, the production decreased 3%, according to Petrobras. In 2003, the production was 1.54 million bpd avg. The decline in production was due to delays in construction and the arrival of two Floating Production Storage Offloading vessels, the P-43 and P-48. The P-43 began to process crude oil on 12/22/2004. When the P-48 enters service, Petrobras will be able to increase its production of crude oil by 500,000 bpd. The P-43 is stationed in the Barracuda field, bay of Campos, offshore the state of Rio de Janeiro, in 800 m of water. Initial oil yield is 10,380 bpd of 25° gravity. Platform P-48, the twin of P-43, is part of the Barracuda-Caratinga project that will increase Petrobras crude oil production by 300,000 bpd. This platform will enter service in January 2005. With the new capacity, the production of crude oil by Petrobras is expected to reach 1.9 million bpd by the end of 2005. Other floating installations will contribute as well when they enter service, the P-50 and P-34. Petrobras is to invest $26,200 million until 2010 for E&P. Between 2005 and 2008, 17 installations will enter service allowing annual increases of 5.9% in production of crude oil and NGL, achieving self sufficiency in 2006. Petrobras has invested heavily in improved recovery that in the last 10 yr in the Marlim oilfield has yielded an additional increment of 3000 million bbl of crude oil. In November 2004 Petrobras gave a $47 million contract to the Western Geco company to make a three dimensional seismic study of the Marlim basin to identify reserves there. Discovery of an additional 290 million bbl of crude oil in Marlim is expected. On dry land, improved recovery enabled an increment of 200,000 bpd in production from the fields in the states of Bahia, Rio Grande do Norte, and Sergipe in 2004. In 2006-2007, the company expects to substitute for imports of light crude oil its own production to start in the oilfield offshore the state of Espírito Santo. This is lighter crude oil than that from the bay of Campos where the company now obtains 80% of its oil production. The Brazilian oilfields produce mainly heavy crude oil that has to be mixed with lighter imported crude oil to produce quality gasoline. However, Brazil increases its exports of heavy crude oil. The company is involved in new areas of exploration. They are discussed. The Brazilian Petroleum Authority, Agencia Nacional de Petroleo, will likely hold the 7th hydrocarbon licensing round for concessions in crude oil E&P in October 2005.", "Petrobras has utilized different types of units in Marlim Field development. From converted Semi-Submersibles to turret-equipped FPSOs, many different options were made. This paper describes the main reasons for choosing the different types of production units, the conversion approach, and the process plant automation and control system - showing the evolution from one unit to another. The paper also presents the actual performance of each production unit, analyzing the operational results- opex- the main causes of production losses and the efficiency levels reached by the wells and also the process plants. Finally, the paper shows a host of new technologies applied in this development and describes the future units that are on their way to Marlim Field.", "In the presence of the President of the Republic, Luiz Inácio Lula da Silva, the BrasFels S/A shipyard launched to the sea the $(US)1 billion P-51, the first semi-submersible platform built entirely in Brazil. Ordered by Petrobras, the unit is programmed to operate in the Marlim Sul field, Campos basin, state of Rio de Janeiro with 75% of the goods and services applied to the construction provided by Brazilian companies. In 2010, the P-51 will reach its maximum operating capacity of 180,000 bpd of petroleum and 6 million cu m/day of gas. The P-51 will provide about 8% of the national petroleum production. The P-51 will be strategic with respect to increasing the supply of gas to Brazil under Plangás (Plano de Antecipação da Produçäo de Gás Natural). The P-51 is also part of the PDET (Plano Diretor de Escoamento e Tratamento) of the Cuenca basin. Of the 6 million cu m/day of gas produced, a part will be for internal consumption in the P-51 such as fuel to generate electricity and the rest will be sent to dry land. Brazil wants a naval construction base that will supply the needs of Brazil and the entire world. The P-51 will be anchored in the Marlim Sul field of 1,255 m depth 150 km offshore and will be connected to 19 wells (10 producing oil and gas and 9 injecting water) and will produce 22° API. The 9 water injection wells will inject 282,000 bpd of water. Energy use will be 100 Mw, enough energy to light a city of 300,000 persons. The patroness of the P-51 platform was the First Lady of Brazil, Marisa Letícia Lula da Silva.", "As a solution for sand production problems associated with the production of hydrocarbons from sandstone reservoirs, the gravel packing technique (GPT) has been used by Petrobras since the early seventies when some small offshore fields in northeast Brazil were completed with this technique. More recently Petrobras has made important discoveries in unconsolidated to friable turbidite sandstones in Campos Basin area, offshore Rio de Janeiro (fig.1). Carapeba, Vermelho and Pargo fields, the so called Northeastern Pole fields (NP fields); and Albacora and Marlim giants fields, located in deep waters, are among these important discoveries. The GPT has been elected as the only sand control technique suitable to those wells. The paper describes Petrobras search for improvement of GPT to suitably complete NP, Albacora and Marlim wells with this technique. The use of the GPT for Albacora and Marlim is unique and is one of Petrobras challenges to deepwater production." ]

[ "Increasing inputs of harmful material Shipping Pollution from ships takes the form of both catastrophic events (shipwrecks, collisions and groundings) and chronic pollution from regular operational discharges. Good progress has been made over the past 40 years in reducing both. There have been large increases in the global tonnage of cargo carried by sea and in the distances over which those cargoes are carried. There have also been steady increases in the number of passengers carried on cruise ships and ferries. In spite of this, the absolute number of ship losses has steadily decreased. Between 2002 and 2013, the number of losses of ships of over 1,000 gross tonnage thus dropped by 45 per cent to 94. This is largely due to efforts under the three main international maritime safety conventions: the International Convention on the Safety of Life at Sea,87 dealing with ship construction and navigation, the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, 88 dealing with crew, and the International Convention for the Prevention of Pollution from Ships (MARPOL). Pollution from oil has been the most significant type of marine pollution from ships. The number of spills exceeding 7 tons has dropped steadily, in spite of the growth in the quantity carried and the length of voyages, from over 100 spills in 1974 to under five in 2012. The total quantity of oil released in those spills has also been reduced by an even greater factor. Progress has also been made in improving response capabilities, though much remains to be done, especially as coastal States have to bear the capital cost of acquiring the necessary equipment. Reductions in oil pollution have resulted from more effective enforcement of the MARPOL requirements, particularly in western Europe. The changes in arrangements for reparation for any damage caused by oil pollution from ships have improved the economic position of those affected. In spite of all that progress, oil discharges from ships remain an environmental problem, for example, around the southern tip of Africa and in the North-West Atlantic. Off the coast of Argentina, however, a solution to the impact of those discharges on penguin colonies seems to have been found by rerouting coastal shipping. The likely opening of shipping routes through the Arctic between the Atlantic and the Pacific risks introducing that form of pollution into a sea area where response infrastructure is lacking, oil recovery in freezing conditions is difficult and the icy water temperature inhibits the microbial breakdown of the oil. Pollution from cargoes of hazardous and noxious substances appears to be a much smaller problem, even though there are clearly problems with misdescriptions of the contents of containers. Losses of containers, however, appear to be relatively small: in 2011, the losses were estimated at 650 containers out of about 100 million carried in that year." ]

[ "B2241" ]

[ "On December 23, 1982, only 30 days after the 18,600-ton Cherne II jacket was launched. Micoperi completed grouting in all of the 24 pile sleeves. This established a record for the Brazilian state oil company in jacket installation. The structure is located in 142-m water in Campos Basin. In establishing this record, the piles were driven to maximum penetration of 110 m. The jacket, designed by Interconsult (Micoperi), presented a new concept for steel jackets using vertical external skirt piles. The concept eliminated the need for pile guides and enabled the 160-m-long piles to be installed and driven in a single piece. This permitted fast installation in an area of the open South Atlantic subject to severe seas of long period swells almost the entire year. The concept also reduces both overall weight and fabrication time.", "The objective of this paper is to present how Petrobras is successfully managing production losses due to mineral scale formation in subsea production wells from its biggest offshore field1. Marlim Field, discovered in 1985 with a STOIIP estimated at 1,012 million STD m3 (6,369 million STB) and a field area of 146 km2 is located in water depths ranging from 600 m to 1100 m.Current Marlim Field production, around 446,754 bpd is supported by injecting 761,971 bpd of sea water. The water production is 217,150 bpd (water cut = 32%) and GOR is 82 STDm3/STDm3. A total of 117 wells are on operation, with 73 producers and 44 water injectors. The field was developed using subsea completion through the vertical, deviated and horizontal wells, equipped with cased hole and open hole gravel packed screens. Scale formation has occurred as a consequence of the incompatibility between the barium and strontium present in formation water and the high amount of sulfate in the injected seawater. To avoid production losses a plan of water management was implemented, including frequent produced water chemical analyses to investigate the convenience for applying a chemical bullhead treatment to remove scale in the production wells (tubing, screen, gravel pack and near well bore)2,3,4. This paper presents results from dissolver treatments performed in the field and also from a special investigation using a rig in a horizontal well. Valuable information was obtained in this intervention, clearing up the scaling occurrence phenomena in this scenario, allowing therefore an improvement on productivity recovery of the wells.", "In order to comply with ANP / INMETRO No. 1 regulations, Petrobras undertook a project to install fiscal flow meters on its gas pipelines located on its Marlin Asset platforms in the Campos Basin. However, meter installation required 15 days of shutdown on each platform, which would reduce production rates. A technology was needed to minimize shutdown time and maximize revenues; Petrobras selected Hot Tapping and Plugging with a Bypass arrangement. Hot Tapping and Plugging with Bypass procedures isolates a section of the pipe through the installation of temporary STOPPLES that are inserted into the pipe through hot taps made on in-line welded fittings. Using distinct fittings upstream and downstream of the section, it was possible to install a by-pass that allows the normal pipeline flow to remain uninterupted. This procedure allowed the installation of the flow meters on the gas lines and flare lines of 6 Marlin asset platforms on the Campos Basin with no shutdown between February and October 2006. The project lasted for a full year and included planning, engineering design, preliminary inspection, fittings in-line welding, hot tapping and plugging and the installation of 27 flow meters. No production time was lost. A technology taskforce was formed to develop and approve the STOPPLE procedure, since no previous Petrobras standard existed prior to this project. All safety and technical issues were studied and developed to comply with Petrobras safety and quality standards. Through the use of Hot Tapping and Plugging with Bypass technology Petrobras reduced planned shutdown on 6 platforms by 35 days.", "The use of moonpools in offshore technology are normally related to the hull opening in drilling units with the objective to protect drilling equipment from environmental forces, and its design aims the minimum motion of the water inside the moonpool, avoiding water impacts when lowering an equipment. Several studies have been carried out to predict the water dynamics inside the moonpool. At most, analytical tools have been used with experimental results, to obtain a good evaluation of viscous effects. Another line of development uses the moonpools as a device to reduce motions of ships or oil platforms. In his context, the use of moonpools in monocolumn type platforms was studied during the development of the concept, through the partnership between PETROBRAS and University of Säo Paulo -USP. An alternative that became viable in the last years is the use of numerical methods to evaluate potencial parameters, being only necessary simple experiments to obtains viscous data to complete the model. This work, that is a continuation of articles about the issue written before, intends to consolidate the calculation method of moonpool to monocolumn units.", "Petrobras has been successfully dealing with deep water floating production systems using flexible pipes since 1977. During the completion of Marlim South 3 well in 1977, Petrobras was surprised by the occurrence of two birdcage type failures. At that time, Marlim South 3, in a water depth of 1709 m was the deepest offshore production well in operation. Since then. Petrobras has been testing flexible pipes using a field test known as DIP test. In a DIP test, an empty end capped sample of a flexible pipe, about 150m long, is partially-supported by the sea bottom and connected to a lay vessel by a pipe follower or a wire rope. The flexible pipe has to withstand a 4 hour period of cyclic bending due to the motions of the lay vessel. The DIP test has provided Petrobras with information on a new failure mode: lateral buckling in the armor wire. Although a birdcage failure is equally undesirable, lateral buckling of the armor wires implies more danger because it can go unnoticed. In 2001, a research project was set up by the Research and Development Center of Petrobras that was aimed at reproducing the flexible pipe failure modes under laboratory conditions. The purpose was to obtain a better understanding of the failure process, as well as to develop testing alternatives to avoid the significant costs related to DIP tests. In order to assess the effect of cyclic bending as a major factor in degrading the longitudinal compressive strength of flexible pipes 15 destructive tests were performed on 4-inch diameter flexible pipe samples. Two test rigs that accommodated three types of test and a number of test procedures were developed in the project. The number of bending cycles to failure for each sample was determined when subjected to compressive action corresponding to its operational depth. Tests to evaluate the effect of pre-existing damage were also conducted. Special attention was devoted to the effect of layer arrangement on compressive failure. The test results clearly identified the basic failure modes under investigation (i. e. birdcaging and lateral buckling of the armor wires). Suggestions regarding simplified testing procedures and corresponding performance criteria are also presented.", "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market.", "After the boom of converted floating, production, storage and offloading systems, based on the old VLCC design, many engineering institutes started thinking about optimum dimension for new units. However, these new FPSOs designs carried out worldwide concerns about good seakeeping behavior when considering general weather conditions, in order to apply their project to different locations around the globe. Analyzing the Brazilian specific conditions, it was verified that, considering waves, current and wind characteristics, the dimension proportions found in the projected units were not the best options, mostly because of the swell waves influence. Thus, in a cooperative project between University of Sao Paulo and PETROBRAS, the best dimensions for a specific case were studied, based on real premises from Campos Basin. During the study, the roll motion, which usually creates operational limits during hard environmental conditions, was focused. It was possible not only to evaluate the best breath and draught relations, but also the inclusion of a structured skirt in the ship bilge. The influence of different shapes in the ship's bow and stern were also evaluated, showing interesting results regarding the forces applied on the vessel. All the analyses were conducted considering numerical analysis, and the final dimensions were applied to a scaled model, which allowed to verify the real behavior of the projected unit in a test basin. As a conclusion, it was possible to define an optimized hull for the PETROBRAS premises, giving them a real design to be used in future explorations.", "The increasing production of oil and gas in the marine environment and the growing participation of companies of different nationalities and sizes require the use of tools to support the sustainable management of offshore oil and gas production units. This paper presents the results of the application of a sustainability indicator system, developed from the identification of the economic, environmental, social, and operational impacts of the activities of these production units. The sustainability performances of 3 oil and gas production units operating in the Brazilian marine environment were compared to the performance of one considered ideal, through the application of the PROMETHEE II and ordinal COPELAND multicriteria methods. The indicator system applied favored the analysis of the sustainability management of offshore oil and gas production activity in a multidimensional approach, considering the points of view of experts from various areas of knowledge, and proved to be a reliable tool to support the sustainable management of these offshore production units.", "In 2018, Brazil announced the designation of two new Large Scale Marine Protected Areas (LSMPAs), resulting in an increase in protection from 1.5% to 26.36% of the country’s maritime territory. We employ an agenda-setting theory to analyze the Brazilian LSMPAs as a causal case study, unpacking the factors that led to their creation, and providing insights about the process of reaching global targets. Drawing on a detailed literature analysis and interviews with key stakeholders, we argue that reaching an international goal is a political commitment which emerges within a ‘policy window.’ Additionally, we offer seven lessons that can improve the chances of reaching an international goal and shifting the agenda: (1) attract media attention; (2) make a formal commitment; (3) launch a movement or a campaign to attain the goal; (4) make the goals legally binding; (5) propose general international goals; (6) diffuse ideas and (7) form support groups.", "The continuous discoveries of oil fields in deep and ultra-deep Brazilian waters and the excessive wide fluctuations on the rig rates were the reasons for PETROBRAS to enhance the capability of one of its owned semi-submersible drilling rig. This paper aims to present an overview of the main technical aspects of the design and yardwork for the upgrading of semi-submersible drilling rig P-10 unit capacity from 500 m to 1200 m water depth. The upcoming ultra-deep waters scenario in Brazilian offshore, that includes East Albacora, Roncador Phase 2, South Marlim Phase 2 and East Marlin oil fields, demands a further step. Then, preliminary studies were carried out to probe the water depth limit, without hull upgrading, just applying the technologies, that it had in mind since the beginning of this upgrading project, but still needed further tests to bridge the gap until safety utilization. Now, the deep water technologies of taut-leg mooring with polyester rope and risers for slender wells may already be considered applicable. A new pile anchor installation concept was developed, field tested and certified. Altogether, they allow one to predict the feasibility of a new upgrading for P-10 with very limited budget, keeping alive the utilization of this anchor moored drilling unit at waters possibly up to 2000 meters, a new scenario it was initially thought that could be efficiently reached only by means of dyanamic positioning units." ]

[ "Cumulative impacts of human activities on marine biodiversity Marine mammals, marine reptiles, seabirds, sharks, tuna and billfis Cumulative effects are comparatively well documented for species groups of the top predators in the ocean, including marine mammals, seabirds and marine reptiles. Many of those species tend to be highly mobile and some migrate across multiple ecosystems and even entire ocean basins, so that they can be exposed to many threats in their annual cycle. Some of those species are the subject of direct harvesting, particularly some pinnipeds (seals and related species) and seabirds, and by-catch in fisheries can be a significant mortality source for many species. However, in addition to having to sustain the impact of those direct deaths, all of those species suffer from varying levels of exposure to pollution from land-based sources and increasing levels of noise in the ocean. Land-nesting seabirds, marine turtles and pinnipeds also face habitat disturbance, such as through the introduction of invasive predators on isolated breeding islands, the disturbance of beaches where eggs are laid or direct human disturbance from tourism, including ecotourism. Some global measures have been helpful in addressing specific sources of mortality, such as the global moratorium on all large-scale pelagic drift-net fishing called for by the General Assembly in 1991, which was a major step in limiting the by-catch of several marine mammal and seabird species that were especially vulnerable to entanglement. However, for seabirds alone, at least 10 different pressures have been identified that can affect a single population throughout its annual cycle, with efforts to mitigate one pressure sometimes increasing vulnerability to others. Because of the complexity of those issues, conservation and management must therefore be approached with care and alertness to the nature of the interactions among the many human interests, the needs of the animals and their role in marine ecosystems." ]

[ "B2541" ]

[ "Higher mortality and less successful reproduction of marine biotas Levels of by-catch (non-target fish, marine mammals, reptiles and seabirds), discards and waste Current estimates of the number of overfished stocks do not take into account the broader effects of fishing on marine ecosystems and their productivity. In the past, large numbers of dolphins drowned in fishing nets. This mortality greatly reduced the abundance of several dolphin species in the latter half of the twentieth century. Thanks to international efforts, fishing methods have changed and the by-catch has been reduced significantly. Commercial fisheries are the most serious pressure at sea that the world’s seabirds face, although there is evidence of some reductions of by-catch in some key fisheries. Each year, incidental by-catch in longline fisheries is estimated to kill at least 160,000 albatrosses and petrels, mainly in the southern hemisphere. For marine reptiles, a threat assessment scored fishery by-catch as the highest threat across marine turtle subpopulations, followed by harvesting (that is, for human consumption) and coastal development. The mitigation of those causes of mortality can be effective, even though the lack of reliable data can hamper the targeting of mitigation measures. Depending on the particular species and fishery methods, mitigation may include the use of acoustic deterrents, gear modifications, time or area closures and gear switching (for example, from gillnets to hooks and lines). In particular, the global moratorium on all large-scale pelagic drift-net fishing called for by the General Assembly in 1991 was a major step in limiting the by-catch of several marine mammal and seabird species that were especially vulnerable to entanglement.", "Increasing inputs of harmful material Human health, food security and food safety Marine biotas are under many different pressures from hazardous substances on reproductive success. Dead zones and low-oxygen zones resulting from eutrophication and climate change can lead to systematic changes in the species structure at established fishing grounds. Either can reduce the extent to which fish and other species used as seafood will continue to reproduce at their historical rates. When those effects are combined with those of excessive fishing on specific stocks, there are risks that the traditional levels of the provision of food from the sea will not be maintained. In addition, heavy metals and other hazardous substances represent a direct threat to human health, particularly through the ingestion of contaminated food from the sea. The episode of mercury poisoning at Minamata, in Japan, is probably the most widely known event of that kind, and the reason why the global convention to address such problems is named after the town. There are places around the world where local action has been taken to prevent or discourage the consumption of contaminated fish and other seafood. In other places, monitoring suggests that levels of contamination dangerous for human health are being reached. In yet other places, there are inadequate monitoring systems to check on risks of that kind. Ensuring linkages between adequate systems for controlling the discharge and emissions of hazardous substances and the systems for controlling the quality of fish and other seafood available for human consumption is therefore an important issue. In the case of subsistence fishing, the most effective approach is to ensure that contamination does not occur in the first place. The lack of proper management of wastewater and human bodily wastes causes problems for human health, both directly through contact with water containing pathogens and through bacteriological contamination of food from the sea, and indirectly by creating the conditions in which algal blooms can produce toxins that infect seafood. Those problems are particularly significant in and near large and growing conurbations without proper sewage treatment systems, such as found in many places in developing countries.", "Impacts of climate change and related changes in the atmosphere Coral reefs Corals are subject to “bleaching” when the seawater temperature is too high: they lose the symbiotic algae that give coral its colour and part of its nutrients. Coral bleaching was a relatively unknown phenomenon until the early 1980s, when a series of local bleaching events occurred, principally in the eastern tropical Pacific and Wider Caribbean regions. Severe, prolonged or repeated bleaching can lead to the death of coral colonies. An increase of only 1°C to 2°C above the normal local seasonal maximum can induce bleaching. Although most coral species are susceptible to bleaching, their thermal tolerance varies. Many heat-stressed or bleached corals subsequently die from coral diseases. Rising temperatures have accelerated bleaching and mass mortality during the past 25 years. The bleaching events in 1998 and 2005 caused high coral mortality at many reefs, with little sign of recovery. Global analysis shows that this widespread threat has significantly damaged most coral reefs around the world. Where recovery has taken place, it has been strongest on reefs that were highly protected from human pressures. However, a comparison of the recent and accelerating thermal stress events with the slow recovery rate of most reefs suggests that temperature increase is outpacing recovery. Losses of coral reefs can have negative effects on fish production and fisheries, coastal protection, ecotourism and other community uses of coral reefs. Current scientific data and modelling predict that most of the world’s tropical and subtropical coral reefs, particularly those in shallow waters, will suffer from annual bleaching by 2050, and will eventually become functionally extinct as sources of goods and services. This will have not only profound effects on small island developing States and subsistence fishermen in low-latitude coastal areas, but also locally significant effects even in major economies, such as that of the United States.", "Pressures from changes in ocean chemistry Ocean uptake of carbon dioxide emissions is rapidly changing seawater chemistry in a process known as ocean acidification (see chap. 5). As the partial pressure of carbon dioxide in seawater increases, it causes the carbonate saturation state to fall below levels suitable for globally important reef-forming taxa (Albright and others, 2018). Most coral reefs (shallow and deep) are vulnerable to rising CO2 concentrations (Lam and others, 2019). Ocean acidification is causing the depth at which seawater is corrosive to carbonate to shoal, threatening deepwater coral reefs worldwide through dissolution and intensified bioerosion (Gómez and others, 2018). Ocean acidification combines with warming, rising sea level and more severe storms to reduce reef resilience on a global scale and augment reef destruction. In the Arctic, there has been a rapid expansion in the area where surface seawater is corrosive to calcareous organisms (Brodie and others, 2014). Ocean acidification may affect all marine life, for example, through changes in gene expression, physiology, reproduction and behaviour (Riebesell and Gattuso, 2015; IPCC, 2019). Between 2005 and 2009, ocean acidification jeopardized a $270 million shellfish aquaculture industry that provided 3,200 jobs per year in Washington State, United States. Billions of oysters died in hatcheries because seawater had become corrosive to larval shells (Ekstrom and others, 2015). In addition to its negative impacts on calcifying phyto- and zooplankton, acidification can lower the nutritional value of seafood. Ocean acidification also affects ecosystem properties, functions and services. Some groups of organisms do well in acidified conditions, but many taxa do not (Agostini and others, 2018). Many algae are resilient to the levels of ocean acidification projected under the Intergovernmental Panel on Climate Change RCP 8.5 scenario, yet shifts in community composition greatly alter seaweed habitats (Brodie and others, 2014; Enochs and others, 2015). Increased carbon availability stimulates primary production and can increase the standing stock of kelps and seagrasses (Russell and others, 2013; Linares and others, 2015; Cornwall and others, 2017), although microalgae and turf algae dominate acidified waters in exposed conditions (Agostini and others, 2018; Connell and others, 2018). Research at natural marine CO2 seeps has shown that there is about a 30 per cent decrease in macrofaunal biodiversity as average pH declines from 8.1 to 7.8 (Agostini and others, 2018; Foo and others, 2018), which is attributable to direct effects, such as increased metabolic costs of coping with hypercapnia, or indirect effects, such as increased susceptibility to predation (Sunday and others, 2017). Some corals grow well in seawater with elevated CO2 concentrations, but the habitats they form lack diversity as reefs are degraded by ocean acidification owing to chemical dissolution and enhanced bioerosion, causing a shift to less diverse ecosystems. Chapter 7D also reviews the impacts of ocean acidification on coral reefs. The dual effects of increased CO2 and decreased carbonate alter trophic interactions. Reductions in the abundance and size of calcareous herbivores contribute to the overgrowth of weedy turf algae and a simplification of food webs, with losses in functional diversity (Vizzini and others, 2017; Teixidó and others, 2018).", "Increasing inputs of harmful material Eutrophication Eutrophication resulting from excess inputs of nutrients from both agriculture and sewage causes algal blooms. Those can generate toxins that can make fish and other seafood unfit for human consumption. Algal blooms can also lead to anoxic areas (i.e. dead zones) and hypoxic zones. Such zones have serious consequences from environmental, economic and social aspects. The anoxic and hypoxic zones drive fish away and kill the benthic wildlife. Where those zones are seasonal, any regeneration that happens is usually at a lower trophic level, and the ecosystems are therefore degraded. This seriously affects the maritime economy, both for fishermen and, where tourism depends on the attractiveness of the ecosystem (for example, around coral reefs), for the tourist industry. Social consequences are then easy to see, both through the economic effects on the fishing and tourist industries and in depriving the local human populations of food.", "There are a number of threats to human health arising from the marine environment that have now been identified: Increase in the spread of pathogens related to climate warming (e.g., Vibrio). Also, there is some evidence related to an increase in some harmful algal bloom species related to climate warming is some regions (Hinder and others, 2012; Vezzulli and others, 2016); Recently, non-indigenous species, sometimes called invasive alien species, have started to be considered as one of the major threats to global marine ecosystems through impacts on the ecosystems’ structure, function and services (Galil, 2018). A small number of poisonous or venomous marine non-indigenous species represent potential threats to human health. Intensification of anthropogenic activities, coupled with rapidly increasing coastal urbanization, drive complex and fundamental changes in coastal waters, including increases in alien species. Some of the alien venomous and poisonous species have attracted the attention of scientists, managers, the media and the public for their conspicuous human health impacts. In the Mediterranean alone, 10 non-indigenous species are considered human health hazards, running the gamut from nuisance to lethal (Galil, 2018). Human health hazards of non-indigenous species are expected to worsen as a result of climate change. The poleward influx of warm water biota enables them to spread to regions as yet uncolonized; A further, recently identified health threat is the potential role of plastic marine litter as a vector for opportunistic human pathogens and antibiotic-resistant microorganisms (Barboza and others, 2018; Harrison and others, 2018; Imran and others, 2019). Various pathogenic bacteria bind, in particular and strongly, to plastic litter (for example, Vibrio cholerae and some strains of Escherichia coli). Such human pathogens can colonize plastic surfaces in stable biofilms. The scientific and medical understanding of that health threat of plastic pollution is inadequate but the threat is dealt with as a further aspect of the problem of marine litter discussed in chapter 12. A severe problem could arise in areas that are highly polluted as a result of natural disasters, climate crises or occurring epidemics, or in conflict zones (Vethaak and Leslie, 2016; Keswani and others, 2016; Galloway and others, 2017; Leonard and others, 2018a, 2018b; Moore and others, 2014).", "Higher mortality and less successful reproduction of marine biotas Captures of fish stocks at levels above maximum sustainable yield Globally, the levels of capture fisheries are near the ocean’s productive capacity, with catches on the order of 80 million tons. Exploitation inevitably reduces total population biomass through removals. As long as the fish stock can compensate through increased productivity because the remaining individuals face less competition for access to food and therefore grow faster and produce more progeny, then fishing can be sustained. However, when the rate of exploitation becomes faster than the stock can compensate through increasing growth and reproduction, the removal level becomes unsustainable and the stock declines. At present, about one quarter of all assessed fish stocks are being overfished and more are still recovering from past overfishing. This is undermining the contribution that they could make to food security. Ending overfishing is a precondition for allowing stocks to rebuild. Other stocks may still be categorized as “fully exploited” despite being on the borderline of overfishing. Those could produce greater yields if effectively managed. There are only a few means available to increase yields. Ending overfishing, eliminating illegal, unreported and unregulated fishing, bringing all fishery yields under effective management and rebuilding depleted resources may result in an increase of as much as 20 per cent in potential yield, provided that the transitional economic and social costs of rebuilding depleted stocks can be addressed. Overfishing can also undermine the biodiversity needed to sustain marine ecosystems. Without careful management, such impacts on biodiversity will endanger some of the most vulnerable human populations and marine habitats around the world, as well as threaten food security and other important socioeconomic aspects (such as livelihoods).", "Higher mortality and less successful reproduction of marine biotas Impacts of disturbance from noise Anthropogenic noise in the ocean increased in the last half of the past century. Commercial shipping is the main source, and the noise that it produces is often in frequency bands used by many marine mammals for communication. Many other types of marine biotas have also been shown to be affected by anthropogenic noise. Other significant sources of noise are seismic exploration for the offshore hydrocarbon industry and sonar. The impact of noise can be both to disrupt communication among animals and to displace them from their preferred breeding, nursery or feeding grounds, with consequent potential effects on their breeding success and survival. Impacts of recreational fishing Recreational fishing is a popular activity in many industrialized countries, in which up to 10 per cent of the adult population may participate. The impact of that type of fishing is only sometimes taken into account in fishery management, although the quantities caught can be significant for the management of stocks experiencing overfishing. In several countries, there is a substantial industry supporting the recreational catching of sport fish (including trophy fish, such as marlins, swordfish and sailfish), but catch statistics are generally not available.", "Higher mortality and less successful reproduction of marine biotas Species structure of highly productive sea areas Many human activities have been documented to have impacts on marine life living on the seabed (benthic communities). The adverse effects of mobile bottom-contacting fishing gear on coastal and shelf benthic communities have been documented essentially everywhere that such gear has been used. Bottom trawling has caused the destruction of a number of long-lived cold-water coral and sponge communities that are unlikely to recover before at least a century. Many reviews show that, locally, the nature of those impacts and their duration depend on the type of substrate and frequency of trawling. Those effects have been found in all the regional assessments. With regard to fish and pelagic invertebrate communities, much effort has been devoted to teasing apart the influences of exploitation and of environmental conditions as drivers of change in fish populations and communities, but definitive answers are elusive. Most studies devote attention to explaining variation among coastal fishcommunity properties in terms of features of the physical and chemical habitats (including temperature, salinity, oxygen and nutrient levels, clarity of, and pollutants in, the water column) and of depth, sediment types, benthic communities, contaminant levels, oxygen levels and disturbance of the sea floor. All of those factors have been shown to influence fish-community composition and structure in at least some coastal areas of each ocean basin. The scale at which a fish-community structure is determined and its variation is documented can be even more local, because some important drivers of change in coastal fish communities are themselves very local in scale, such as coastal infrastructure development. Other obvious patterns are recurrent, such as increasing mortality rates (whether from exploitation or coastal pollution) leading both to fish communities with fewer large fish and to an increase in species with naturally high turnover rates. However, some highly publicized projections of the loss of all commercial fisheries or of all large predatory fish by the middle of the current century have not withstood critical review.", "Impacts of climate change and related changes in the atmosphere Shellfish productivity Because of the acidification of the ocean, impacts on the production by shellfish of their calcium carbonate shells has already been observed periodically at aquaculture facilities, hindering production. As acidification intensifies, this problem will become more widespread, and occur in wild, as well as in cultured, stocks. However, like all other ocean properties, acidification is not evenly distributed, so that the effects will not be uniform across areas and there will be substantial variation over small spatial scales. In addition, temperature, salinity and other changes will also change shellfish distributions and productivity, positively or negatively in different areas. As with fishing, the course of those changes is highly uncertain and may be disruptive to existing shellfish fisheries and aquaculture. Low-lying coasts Sea-level rise, due to ocean warming and the melting of land ice, poses a significant threat to coastal systems and low-lying areas around the world, through inundations, the erosion of coastlines and the contamination of freshwater reserves and food crops. To a large extent, such effects are inevitable, as they are the consequences of conditions already in place, but they could have devastating effects if mitigation options are not pursued. Entire communities on low-lying islands (including States such as Kiribati, Maldives and Tuvalu) have nowhere to retreat to within their islands and have therefore no alternative but to abandon their homes entirely, at a cost they are often ill-placed to bear. Coastal regions, particularly some low-lying river deltas, have very high population densities. Over 150 million people are estimated to live on land that is no more than 1 metre above today’s high-tide levels, and 250 million at elevations within five metres of that level. Because of their high population densities, coastal cities are particularly vulnerable to sea-level rise in concert with other effects of climate change, such as changes in storm patterns." ]

[ "Global surface ocean pH has declined on average by approximately 0.1 since the Industrial Revolution, an increase in acidity of about 30 per cent. Ocean pH is projected to decline by approximately an additional 0.3 over the next century unless global carbon emissions are significantly curtailed. The changes can be observed in extended ocean time series, and the rate of change is likely to be unparalleled in at least the past 66 million years. The time of emergence of the signal varies from 8 to 15 years for open ocean sites and 16 to 41 years for coastal sites, making it necessary to commit to long-term observational records, especially in the coastal zone, where most commercially and culturally important marine resources reside.Oceanic oxygen levels have declined in recent decades, with strong regional variations. While the overall oxygen content has decreased by about 2 per cent in five decades, oxygen in coastal areas or near oxygen minimum zones shows larger variations. Coastal changes are mostly fuelled by riverine run-off, and the open ocean changes are likely related to a combination of changes in ocean circulation and biogeochemical cycles. Temperature-driven solubility decrease is responsible for most near-surface oxygen loss, while other processes have to be accountable for deep-ocean oxygen loss. A further decrease in oxygen in and near oxygen minimum zones can lead to climate feedback through consequent greenhouse gas emissions.Sea ice covers 15 per cent of the global ocean and affects global heat balance and global thermohaline circulation. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. Arctic sea ice extent is declining by -2.7 ± 0.4 per cent c-1 during the winter, and -2.8 ± 2.3 per cent c-1 during the summer. In contrast, trends in total Antarctic sea ice extent are insignificant, 0.6 ± 0.6 per cent c-1 during the summer and 1.1 ± 3.7 per cent c-1 during the winter. Regionally, the spatial distribution of the trends is dramatic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. The spatial distribution of the changes in sea ice is attributed to changes in wind and ocean currents related to the Arctic Oscillation in the northern hemisphere and the Southern Annular Mode and El Niño in the southern hemisphere." ]

[ "B2319" ]

[ "Pressures from changes in ocean chemistry Ocean uptake of carbon dioxide emissions is rapidly changing seawater chemistry in a process known as ocean acidification (see chap. 5). As the partial pressure of carbon dioxide in seawater increases, it causes the carbonate saturation state to fall below levels suitable for globally important reef-forming taxa (Albright and others, 2018). Most coral reefs (shallow and deep) are vulnerable to rising CO2 concentrations (Lam and others, 2019). Ocean acidification is causing the depth at which seawater is corrosive to carbonate to shoal, threatening deepwater coral reefs worldwide through dissolution and intensified bioerosion (Gómez and others, 2018). Ocean acidification combines with warming, rising sea level and more severe storms to reduce reef resilience on a global scale and augment reef destruction. In the Arctic, there has been a rapid expansion in the area where surface seawater is corrosive to calcareous organisms (Brodie and others, 2014). Ocean acidification may affect all marine life, for example, through changes in gene expression, physiology, reproduction and behaviour (Riebesell and Gattuso, 2015; IPCC, 2019). Between 2005 and 2009, ocean acidification jeopardized a $270 million shellfish aquaculture industry that provided 3,200 jobs per year in Washington State, United States. Billions of oysters died in hatcheries because seawater had become corrosive to larval shells (Ekstrom and others, 2015). In addition to its negative impacts on calcifying phyto- and zooplankton, acidification can lower the nutritional value of seafood. Ocean acidification also affects ecosystem properties, functions and services. Some groups of organisms do well in acidified conditions, but many taxa do not (Agostini and others, 2018). Many algae are resilient to the levels of ocean acidification projected under the Intergovernmental Panel on Climate Change RCP 8.5 scenario, yet shifts in community composition greatly alter seaweed habitats (Brodie and others, 2014; Enochs and others, 2015). Increased carbon availability stimulates primary production and can increase the standing stock of kelps and seagrasses (Russell and others, 2013; Linares and others, 2015; Cornwall and others, 2017), although microalgae and turf algae dominate acidified waters in exposed conditions (Agostini and others, 2018; Connell and others, 2018). Research at natural marine CO2 seeps has shown that there is about a 30 per cent decrease in macrofaunal biodiversity as average pH declines from 8.1 to 7.8 (Agostini and others, 2018; Foo and others, 2018), which is attributable to direct effects, such as increased metabolic costs of coping with hypercapnia, or indirect effects, such as increased susceptibility to predation (Sunday and others, 2017). Some corals grow well in seawater with elevated CO2 concentrations, but the habitats they form lack diversity as reefs are degraded by ocean acidification owing to chemical dissolution and enhanced bioerosion, causing a shift to less diverse ecosystems. Chapter 7D also reviews the impacts of ocean acidification on coral reefs. The dual effects of increased CO2 and decreased carbonate alter trophic interactions. Reductions in the abundance and size of calcareous herbivores contribute to the overgrowth of weedy turf algae and a simplification of food webs, with losses in functional diversity (Vizzini and others, 2017; Teixidó and others, 2018).", "Ocean warming and land ice melt are the main causes of present-day accelerating global mean sea level rise. The global mean sea level has been rising since 1993 (the altimetry era) at a mean rate of 3.1 ± 0.3 mm per year, with a clear superimposed acceleration of approximately 0.1 mm per year. Satellite altimetry has also revealed strong regional variability in the rates of sea level change, with regional rates up to two or three times greater than the global mean in some regions. Owing to global warming, many circulation systems also experience changes. Changes in sea level height, measured with high-precision satellite altimetry, hint at the widening and strengthening of the subtropical gyres in the North and South Pacific. The studies, furthermore, show a poleward movement of many ocean currents, including the Antarctic circumpolar current and the subtropical gyres in the southern hemisphere, as well as western boundary currents in all ocean basins. One of the major ocean current systems, the Atlantic meridional overturning circulation, has already weakened, and it is very likely that it will continue to do so in the future. Impacts that follow such changes include regional sea level rise, changes in nutrient distribution and carbon uptake and feedbacks with the atmosphere. The globally averaged ocean surface temperature data show a warming of 0.62±0.12?°C per century over the period 1900– 2018. In the recent decade (2009–2018), the rate of ocean surface warming is 2.56±0.68?°C c-1. The warming happens in most ocean regions with some areas, such as in the North Atlantic, showing long-term cooling. Since 1955, the upper 2,000 m of the ocean has also exhibited signs of robust warming, as evidenced by the increase in ocean heat content. The spatial patterns of multidecadal salinity changes provide convincing evidence of global-scale water cycle change in the global ocean coincident with warming over the period. The resolved changes are replicated in all observed analyses of long-term salinity changes, and more recently have been reproduced in forced climate model simulations. Those changes are manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and corresponding freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. Similar changes are also seen in the ocean subsurface, with similar patterns of freshening low-salinity waters and enhanced high-salinity waters represented in each of the ocean basins, Atlantic, Pacific and Indian, and across the Southern Ocean.", "Impacts of climate change and related changes in the atmosphere Sea-level rise It is very likely that extreme sea-level maxima have already increased globally since the 1970s, mainly as a result of global mean sea-level rise. That rise is due in part to anthropogenic warming, causing ocean thermal expansion and the melting of glaciers and of the polar continental ice sheets. Globally averaged sea level has thus risen by 3.2 mm a year for the past two decades, of which about a third is derived from thermal expansion. Some of the remainder is due to fluxes of freshwater from the continents, which have increased as a result of the melting of continental glaciers and ice sheets. Finally, regional and local sea-level changes are also influenced by natural factors, such as regional variability in winds and ocean currents, vertical movements of the land, isostatic adjustment of the levels of land in response to changes in physical pressures on it and coastal erosion, combined with human perturbations by change in land use and coastal development. As a result, sea levels will rise more than the global mean in some regions, and will actually fall in others. A 4°C warming by 2100 (which is predicted in the high-end emissions scenario in the report of the Intergovernmental Panel on Climate Change) would lead, by the end of that period, to a median sea-level rise of nearly 1 metre above the 1980 to 1999 levels. Ocean acidification Rising concentrations of carbon dioxide in the atmosphere are resulting in increased uptake of that gas by the ocean. There is no doubt that the ocean is absorbing more and more of it: about 26 per cent of the increasing emissions of anthropogenic carbon dioxide is absorbed by the ocean, where it reacts with seawater to form carbonic acid. The resulting acidification of the ocean is occurring at different rates around the seas, but is generally decreasing the levels of calcium carbonate dissolved in seawater, thus lowering the availability of carbonate ions, which are needed for the formation by marine species of shells and skeletons. In some areas, this could affect species that are important for capture fisheries.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "In the present chapter, the current physical and chemical state of the ocean and its trends are analysed using seven key climate change indicators: Sea level.Sea level integrates changes occurring in the Earth’s climate system in response to unforced climate variability, as well as natural and anthropogenic influences. It is therefore a leading indicator of global climate change and variability. Ocean circulation. Ocean circulation plays a central role in regulating the Earth’s climate and influences marine life by transporting heat, carbon, oxygen and nutrients. The main drivers of ocean circulation are surface winds and density gradients (determined by ocean temperature and salinity), and any changes in those drivers can induce changes to ocean circulation. Sea temperature and ocean heat content. The rapid warming of the global ocean over the past few decades has affected the weather, climate, ecosystems, human society and economies (Intergovernmental Panel on Climate Change, 2019). More heat in the ocean is manifested in many ways, including an increasing interior ocean temperature (Cheng and others, 2019b), a rising sea level caused by thermal expansion, melting ice sheets, an intensified hydrological cycle, changing atmospheric and oceanic circulations and stronger tropical cyclones with heavier rainfall (Trenberth and others, 2018). Salinity. With the advent of improved observational salinity products, more attention has been paid to ocean salinity in Intergovernmental Panel on Climate Change assessment reports (fourth report, Bindoff and others, 2007; and fifth report, Rhein and others, 2013) and in the first World Ocean Assessment (United Nations, 2017). Changes to ocean salinity are important given that the global ocean covers 71 per cent of the Earth’s surface and contains 97 per cent of the Earth’s free water (Durack, 2015). Any global water changes will be expressed in the changing patterns of ocean salinity, a water cycle marker of the largest reservoir of the climate system. Ocean acidification. Rising concentrations of CO2 in the atmosphere also have a direct effect on the chemistry of the ocean through the absorption of CO2. The ocean absorbed roughly 30 per cent of all CO2 emissions in the period from 1870 to 2015 (Le Quéré and others, 2016; Gruber and others, 2019), and the increased CO2 level in the water lowers its pH through the formation of carbonic acid. Dissolved oxygen. Variations in oceanic oxygen have a profound impact on marine life, from nutrient cycling to pelagic fish habitat boundaries (e.g., Worm and others, 2005; Diaz and Rosenberg, 2008; Stramma and others, 2012; Levin, 2018) and can influence climate change through emissions of nitrous oxide, a potent greenhouse gas (e.g., Voss and others, 2013). Sea ice. Sea ice in the polar regions covers about 15 per cent of the global ocean and affects the global climate system through its influence on global heat balance and global thermohaline circulation. In addition, sea ice has a high albedo, reflecting more sunlight than the liquid ocean, and its melt releases fresh water, which slows the global ocean conveyor belt (the constantly moving system of deep-ocean circulation driven by temperature and salinity). The present chapter, using those indicators, contains details of the impacts of climate change on the physical and chemical state of the ocean and its evolution and spatial patterns. It is to be read in conjunction with chapter 9, in which extreme climate events (marine heatwaves, extreme El Niño events and tropical cyclones) are analysed and the pressures of some of the physical and chemical changes on marine ecosystems and human populations are described in more detail. Some additional aspects are covered in the section on high-latitude ice in chapter 7 on trends in the state of biodiversity in marine habitats.", "Impacts of climate change and related changes in the atmosphere Salinity Alongside broad-scale ocean warming, shifts in ocean salinity (salt content) have also occurred. The variations in the salinity of the ocean around the world result from differences in the balance between freshwater inflows (from rivers and glacier and icecap melt), rainfall and evaporation, all of which are affected by climate change. The shifts in salinity, which are calculated from a sparse historical observing system, suggest that at the surface, high-salinity subtropical ocean regions and the entire Atlantic basin have become more saline, while low-salinity regions, such as the western Pacific Warm Pool, and high-latitude regions have become even less saline. Since variations in salinity are one of the drivers of ocean currents, those changes can have an effect on the circulation of seawater and on stratification, as well as having a direct effect on the lives of plants and animals by changing their environment. Stratification Differences in salinity and temperature among different bodies of seawater result in stratification, in which the seawater forms layers, with limited exchanges between them. Increases in the degree of stratification have been noted around the world, particularly in the North Pacific and, more generally, north of 40ºS. Increased stratification brings with it a decrease in vertical mixing in the ocean water column. This decreased mixing, in turn, reduces oxygen content and the extent to which the ocean is able to absorb heat and carbon dioxide, because less water from the lower layers is brought up to the surface, where such absorption takes place. Reductions in vertical mixing also impact the amount of nutrients brought up from lower levels into the zone that sunlight penetrates, with consequent reductions in ecosystem productivity.", "Impacts of climate change and related changes in the atmosphere Shellfish productivity Because of the acidification of the ocean, impacts on the production by shellfish of their calcium carbonate shells has already been observed periodically at aquaculture facilities, hindering production. As acidification intensifies, this problem will become more widespread, and occur in wild, as well as in cultured, stocks. However, like all other ocean properties, acidification is not evenly distributed, so that the effects will not be uniform across areas and there will be substantial variation over small spatial scales. In addition, temperature, salinity and other changes will also change shellfish distributions and productivity, positively or negatively in different areas. As with fishing, the course of those changes is highly uncertain and may be disruptive to existing shellfish fisheries and aquaculture. Low-lying coasts Sea-level rise, due to ocean warming and the melting of land ice, poses a significant threat to coastal systems and low-lying areas around the world, through inundations, the erosion of coastlines and the contamination of freshwater reserves and food crops. To a large extent, such effects are inevitable, as they are the consequences of conditions already in place, but they could have devastating effects if mitigation options are not pursued. Entire communities on low-lying islands (including States such as Kiribati, Maldives and Tuvalu) have nowhere to retreat to within their islands and have therefore no alternative but to abandon their homes entirely, at a cost they are often ill-placed to bear. Coastal regions, particularly some low-lying river deltas, have very high population densities. Over 150 million people are estimated to live on land that is no more than 1 metre above today’s high-tide levels, and 250 million at elevations within five metres of that level. Because of their high population densities, coastal cities are particularly vulnerable to sea-level rise in concert with other effects of climate change, such as changes in storm patterns.", "Impacts of climate change and related changes in the atmosphere Sea-surface temperature The Intergovernmental Panel on Climate Change has reaffirmed in its fifth report its conclusion that global sea-surface temperatures have increased since the late nineteenth century. Upper-ocean temperature (and hence its heat content) varies over multiple time scales, including seasonal, inter-annual (for example, those associated with the El Niño-Southern Oscillation), decadal and centennial periods. Depth-averaged ocean-temperature trends from 1971 to 2010 are positive (that is, they show warming) over most of the globe. The warming is more prominent in the northern hemisphere, especially in the North Atlantic. Zonally averaged upper-ocean temperature trends show warming at nearly all latitudes and depths. However, the greater volume of the ocean in the southern hemisphere increases the contribution of its warming to the global heat content. The ocean’s large mass and high heat capacity enable it to store huge amounts of energy, more than 1,000 times than that found in the atmosphere for an equivalent increase in temperature. The earth is absorbing more heat than it is emitting back into space, and nearly all that excess heat is entering the ocean and being stored there. The ocean has absorbed about 93 per cent of the combined extra heat stored by warmed air, sea, land, and melted ice between 1971 and 2010. During the past three decades, approximately 70 per cent of the world’s coastline has experienced significant increases in sea-surface temperature. This has been accompanied by an increase in the yearly number of extremely hot days along 38 per cent of the world’s coastline. Warming has also been occurring at a significantly earlier date in the year along approximately 36 per cent of the world’s temperate coastal areas (between 30° and 60° latitude in both hemispheres). That warming is resulting in an increasingly poleward distribution of many marine species.", "Imbalances in the freshwater cycle manifest themselves as changes in global sea level. Changes in global mean sea level are largely caused by a combination of changes in ocean heat content and exchanges of freshwater between the ocean and continents. When water is added to the ocean, global sea level adjusts, rapidly resulting in a relatively uniform spatial pattern for the seasonal ocean mass balance, as compared to the seasonal steric signal, which has very large regional amplitudes (Chambers, 2006). ‘Steric’ refers to density changes in seawater due to changes in heat content and salinity. On annual scales, the maximum exchange of freshwater from land to ocean occurs in the late Northern Hemisphere summer, and therefore the seasonal ocean mass signal is in phase with total sea level with an amplitude of about 7 mm (Chambers et al., 2004). Because most of the ocean is in the Southern Hemisphere, the seasonal maximum in the steric component occurs in the late Southern Hemisphere summer, when heat storage in the majority of the ocean peaks (Leuliette and Willis, 2011). Because globally averaged sea level variations due to heat content changes largely cancel out between the Northern and Southern Hemispheres, the size of the steric signal, globally averaged, is only 4 mm. Globally averaged sea level has risen at 3.2 mm/yr for the past two decades (Church et al., 2011), of which about a third comes from thermal expansion. The remainder is due to fluxes of freshwater from the continents, which have increased as the melting of continental glaciers and ice sheets responds to higher temperatures. Multi-decadal fluctuations in equatorial and mid-latitude winds (Merrifield et al., 2012; Moon et al., 2013) cause regional patterns in sea-level trends which are reflected in the El Niño/Southern Oscillation (ENSO) and the Pacific decadal oscillation (PDO) indices in the Pacific (Merrifield et al., 2012; Zhang and Church, 2012) and northern Australia (White et al., 2014). Interannual changes in global mean sea level relative to the observed trend are largely linked to exchanges of water with the continents due to changes in precipitation patterns associated largely with the ENSO; this includes a drop of 5 mm during 2010-11 and rapid rebound in 2012-13 (Boening et al., 2012; Fasullo et al., 2013).", "Wind-driven mixing affects only the surface of the ocean, mainly the upper 200 metres or so, and rarely deeper than about 1,000 metres. Without the ocean’s thermohaline circulation system, the bottom waters of the ocean would soon be depleted of oxygen, and aerobic life there would cease to exist. Superimposed on all these processes, there is the twice-daily ebb and flow of the tide. This is, of course, most significant in coastal seas. The tidal range varies according to local geography: the largest mean tidal ranges (around 11.7 metres) are found in the Bay of Fundy, on the Atlantic coast of Canada, but ranges only slightly less are also found in the Bristol Channel in the United Kingdom, on the northern coast of France, and on the coasts of Alaska, Argentina and Chile (NOAA 2014). Global warming is likely to affect many aspects of ocean processes. Changes in seasurface temperature, sea level and other primary impacts will lead, among other things, to increases in the frequency of major tropical storms (cyclones, hurricanes and typhoons) bigger ocean swell waves and reduced polar ice formation. Each of these consequences has its own consequences, and so on (Harley et al., 2006; Occhipinti-Ambrogi, 2007). For example, reduced sea ice production in the polar seas will mean less bottom water is produced (Broecker, 1997) and hence less oxygen delivered to the deep ocean (Shaffer et al., 2009)." ]

[ "Sevan Marine has let a contract to a unit of John Wood Group plc for the operation and management of the Sevan Stabilized Platform (SSP) Piranema, a floating production, storage, and offloading (FPSO) vessel. The FPSO will be operated for Petrobras in Piranema oil field off northeastern Brazil. The vessel will be the first implementation worldwide of Sevan Marine's SSP cylindrical monohull design. Piranema's design includes 30,000 bpd of oil process plant capacity, a gas injection plant with 3.6 million cu m/day of compression capacity, and 300,000 bbl of oil storage capacity. Piranema also can accommodate as many as 21 risers." ]

[ "A1049" ]

[ "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "This paper describes the site installation of a turret moored Floating Production, Storage and Offloading System - FPSO - in 780 meters of water in Campos Basin, offshore Brazil. The FPSO, a 270,000 dwt converted tanker, is the first of a series of two ordered by Petrobras for development of the Marlim Field. An internal bow mounted Turret system, anchored to the seafloor by 8 chain-wire rope-chain combined mooring legs, is used to permanently moor the FPSO in the location while allowing the vessel to freely weathervane. Thirty-five flexible risers, laid in a free-hanging catenary configuration, provide the flow path between the FPSO and the various subsea equipment on the seafloor. This paper describes the installation equipment and procedures employed.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability.", "The Petroleo Brasileiro SA (Petrobras), a state-owned oil company utilizes its floating production storage and offloading (FPSO) P-50 vessel to 16 production wells at the Albacora Leste field in Campos basin. FPSO symbolizes Brazil's plans to reach oil self-sufficiency by mid-2006. The FPSO will process oil pumped from the field 150 km off Rio de Janeiro and each peak production of 180,000 b/d by August, which represents around 10% of Brazil's crude oil output. The P-50 will also be able to handle 6M cu m/day of natural gas. The P-50 and P-34, also an FPSO, are to begin processing 20,000 b/d of oil at Jubarte field. They will raise national production to 1.9M b/d in 2006, surpassing domestic needs and making Brazil reach oil self-sufficiency.", "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008.", "These last years the conversion of VLCC (Very Large crude Carrier) in FPSO (Floating, Production, Storage and Offloading) unit has been used by Petrobras in Brazil offshore to work in the exploitation of oil in deep, what is a consequence of the necessity of large storage unit with the capability to transfer the oil to shuttle ships. A group of VLCC hulls was converted to FPSO, with the installation of oil process plants, turrets and so on. The internal conversion solves the questions about the processing, the storage and the oil offloading, but the external hull was not properly designed to respond to the waves, currents and the wind as a stationary unit. Many studies have been more recently developed to discuss the stability of this kind of system, the use of spreading mooring system with different tensions on the lines, the use and the position of a turret, the use of stabilization devices, as doubled rudder, propeller, tugs, etc... Sphaier, Fernandes and Correa (2000a) developed a maneuvering model and a procedure to study the stability of the FPSO and the FPSO and a shuttle during the offloading operation. Looking for the even increasing oil exploration activities and discover of new oil fields in deep water the paper presents a way to establish the main dimensions of a new FPSO in the preliminary design based on stability criteria for the motion in the horizontal plane. The stability problem is formulated in a similar approach as in Sphaier, Fernandes and Correa (1999 and 2000b). But, instead of verifying the stability of the system from known hydrodynamic coefficients, the analytical expression for the eigenvalues is developed as a function of the main dimensions of the floating unit. Due to the complexity of the analytical treatment of the problem the symbolic processor capability of the Mathematica package was explored. The use of additional stabilization devices is also addressed.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market.", "Guara BV, an affiliate of Petrobras, has signed a letter of intent to charter a floating production, storage, and offloading vessel for use on Block BM-S-9 in the Santos basin offshore Brazil. The platform will have a processing capacity of ~ 100,000 bpd of oil and 5 million cu m/day of natural gas. The FPSO will be provided and operated by Modec Inc and Schahin Petroleo e Gas SA for the BM-S-9 consortium for a 20-yr period. Delivery is expected in June 2016, and production is expected to begin 2 mo after the delivery. The consortium is planning to connect at least 8 wells, 4 as producing wells and 4 for injection, to the vessel from the presalt layer in the Carioca area." ]

[ "Deep-sea fans have been proposed to act as carbon sinks, rapid deposition driving shallow methanogenesis to favor net storage within the gas hydrate stability zone (GHSZ). Here, we present new evidence of widespread gas venting from the GHSZ on the upper Amazon deep-sea fan, together with analyses of the first samples of gas hydrates recovered offshore NE Brazil. Multibeam water column and seafloor imagery over an 18,000-km² area of the upper Amazon fan reveal 53 water column gas plumes, rising from venting features in water depths of 650–2600 m. Most gas vents (60%) are located along seafloor faults that record the ongoing gravitational collapse of the fan above deep décollements, while others (40%) are located in water depths of 650–715 m within the upper edge of the GHSZ. Gas compositions from hydrates recovered in vents at three locations on and north of the fan indicate biogenic sources (dominantly methane with 2–15% of CO2; ?¹³C from ? 81.1 to ? 77.3‰), whereas samples from vents adjacent to the fan proper include possible thermogenic contributions (methane 95%, CO2 4%, and ethane 1%; ?¹³C – 59.2‰). These results concur with previous findings that the upper edge of the GHSZ may be sensitive to temporal changes in water temperatures, but further point to the importance of gas escape from within areas of gas hydrate stability. Our results suggest the role of fluid migration along pathways created by faulting within rapidly deposited passive margin depocenters, which are increasingly recognized to undergo gravitational collapse above décollements. Our findings add to evidence that gas can escape from sediments to the sea in areas where gas hydrates are stable on passive margins, and suggest the need of further studies of the dynamics of deep-sea depocenters in relation to carbon cycling." ]

[ "A1948" ]

[ "Petrobras and the UK's BG Group are studying the possibility of installing floating gas-liquefaction plants at the large offshore oil and gas discoveries in the Campos basin's pre-salt areas. The proposed 14 million cu m/day LNG plant would be moored 300 km offshore and would collect gas from various fields in the area, including the giant Tupi discovery. LNG would be delivered to domestic terminals during the country's dry season when, gas-fired power generation supplements hydropower, and exported at other times.", "Marine hydrates (mainly methane hydrates) exist primarily on continental slopes where there are large quantities of methane gas in the ocean, the pressure is high enough and the temperature is low enough. Concern has been expressed about the climatic risks resulting from the sudden release of large amounts of methane from marine hydrates. However, that hypothesis is not widely supported at present and is not mentioned in the recent special report of the Intergovernmental Panel on Climate Change on the ocean and cryosphere in a changing climate. Areas of gas seepage in the deep sea associated with gas hydrates host a very rich level of biodiversity supported by chemosynthetic bacteria. Initial successes have recently been noted by China and Japan in producing methane from marine methane hydrates.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "The objective of this work is to describe the climate of Espírito Santo and the northern part of the Campos Basin (i.e., the Espírito Santo geographical area - ESGA), which is located in southeastern Brazil. The observed data from the Floating, Production, Storage and Offloading-Brazil platform, operated by Petrobras during the period 2004-2013, are used in this work. The results show that the 10-m wind over the ESGA blows predominantly from the northeast, north and east directions during the year, with moderate intensity (between 4.0 and 7.0 m s-1). The north wind is more intense than the south quadrant wind, which occurs during the passage of the transient systems. The average wind speed depends on the South Atlantic subtropical anticyclone position, which influences the surface pressure gradient over the study area. The wind is weaker during autumn; it reaches a monthly average of 5.3 m s-1 in April and is stronger in September and January (7.3 and 7.1 m s-1, respectively). The mean sea level pressure oscillates between 1012.3 hPa in the summer and 1019.5 hPa in the winter; the 2-m air temperature varies between 23.2°C in September and 27.4°C in March, and the 2-m relative humidity exhibits a minimum of 72.7% in May and a maximum of 84.2% in December. With regard to the frontal systems frequency, an average of 30.2 systems reach the southern ESGA each year, with a maximum in September (3.9 systems) and a minimum in February (0.8 system).", "The Campos basin is a sedimentary basin located in offshore Brazil, between the north coast of Rio de Janeiro State and the south coast of Espírito Santo State, encompassing many oilfields. Most of the reservoirs in the basin are high-permeability sandstones containing low API gravity oil but are without strong water drives. Long horizontal producer wells are the best economic option for field development but require water injection to maintain reservoir pressure. Horizontal sections generally range from 1000 to 2000m, which demands gravel pack as a sand control method. Gravel packing such long wells is a challenge and requires thoughtful engineering to optimize pumping techniques and technology. Presented here are best practices to overcome several challenges faced in this field to achieve overall success. The challenge for extended-reach gravel packing is that the long horizontal section develops high friction during the alpha and beta wave propagation. Increasing the pumping pressure to overcome this friction increases the risk of fracturing the formation, consequently reducing the equivalent circulation rate downhole impairing the proppant transportation. In contrast, a reduced pump rate during alpha wave propagation can lead to a premature screenout due to the increase in dune height of over 85%. To overcome these issues and place gravel packs in these wells, careful engineering and simulation, lightweight proppants, friction reducers, and thorough job planning were used to successfully perform gravel packs in more than 40 horizontal wells completed in the Campos basin from 2011 up to 2017. The experience of pumping the longest gravel pack jobs in offshore Brazil (horizontal length more than 2,000m) offer insights into best practices for gravel packs in extended-reach horizontal wells: Design considerations, specific well challenges faced, technologies deployed, and operational planning requirements. Specifically, highlighting the benefits of using lightweight proppants and optimized fluid systems to minimize screen out risks and maximize pack efficiency.", "Currently, the Port of Santos is the largest in Latin America, and its access channel is in the process of deepening, intending to reach 17 m DHN as an ultimate goal. Specifically for the maritime bar section, which is now maintained only by dredging, a significant increase in the volume of maintenance dredging is expected. The current study applied the physical modelling to evaluate the effectiveness of two curved jetties in the maintenance of depth along the inlet entrance of Santos channel, its impact on the dispersion of the plume of effluents from the existing outfall and its influence on the beach adjacent to the proposed right jetty. As a result, the jetties’ layout could maintain the access channel’s depth with a much lower volume of dredging than the current maintenance requires. It was found that the increase of 1.2 km on the outfall’s original length would not only reduce the influence of the jetties’ presence, but also improve significantly the dispersion of effluents in comparison to the original situation. Moreover, the presence of the jetties induces a marine accretion that tends to protect the region adjacent to the inlet, which is currently suffering a severe erosion process. Finally, the study shows that it is completely feasible to adopt the curved jetties to transpose the Port of Santos’ maritime bar, which may be configured as an economic and attractive option to maintain depths of 17 m DHN.", "The Campos Basin (100,000 km2) is located on the continental shelf of southeastern Brazil. Despite the significant oil and gas industrial activities underway in the Campos Basin, scarce information is available regarding the hydrocarbon contents and microbial communities in the deep-sea sediments. To gain new insights on these aspects, we first obtained deep-sea sediment samples with different degrees of oil exposure. We obtained samples from a seabed fissure (N = 28), surroundings (250 m to 500 m from the fissure; N = 24), and a control area (N = 4). We used shotgun metagenomics to characterize the taxonomic and metabolic diversity and analyzed biogeochemical parameters (metal and oil concentration) of all samples. The high levels of unresolved complex mixture of hydrocarbons in the fissure indicate a potentially recent petrogenic contribution in these sediments. The fissure area was found to have a higher abundance of hydrocarbonoclastic bacterial genera and hydrocarbon degradation genes. These bacteria may be used as biosensors of sediment contamination. The effects of oil contamination, mainly around the fissure, are less clear at 250 m and 500 m, suggesting that the surroundings may not have been heavily affected by the oil leakage. Our study demonstrates that metagenomics can disclose biosensors for environmental monitoring.", "The production of several wells from the Albacora ield (Campos Basin, Rio de Janeiro, Brazil) is being togressively lowered due to a paraffin deposition roc ess in the subsea production flowlines. The subsea low temperature is considered to be the leading factor in the paraffin deposition or waxing process of deep water flowlines. The PETROBRÁS Production Department at Campos and it's Research Center are developing techniques to adapt the Nitrogen Generating System (NGS) to operations designed to clean the subsea flowlines of the Campos Basin, mainly those serving the Albacora Field. This process comprises the irreversible fluidization of the paraffin deposit through combined thermal, chemical and mechanical effects obtained in situ by the controlled generation of nitrogen gas, according to the chemical reaction: effective internal volume of the stretch to be treated and numerical simulation of the process. The various dewaxing operations effected at the Albacora field have confirmed the good performance of the NGS process, the benefits of which comprise preservation of the environment, since there is no discharge of by-products to land or sea; also, the increase in oil production, which is of the order of 32%, representing USD 200,000 a day.", "The acoustic patterns variation can be used to understand the sediment distribution extrapolating the information to places where is not possible to take any sample. Many authors already use this integrated method to investigate interest areas in, both, commercial and scientific aspect. In this direction the current study initiated in 2009 in the frame of the Geochemistry Network PETROBRAS/CENPES, aims to track the quaternary evolution of a muddy bank situated at the coastal western boundary upwelling system (WBUS) off Cabo Frio (23oS) in the Atlantic Ocean. The WBUS is located at the north coast of the Rio de Janeiro State, Brazil. Here the coastline orientation differs from the default East-West direction of the Brazilian coast, concomitant with the boundary of the Campos and Santos Basins, the most important oil and gas basins of the country. The upwelling phenomenon occurs due to constant northeast winds. The same winds combined with the Northeast-Southwest coastline orientation also promote a curl confluence making the environment even more complex. Seismic data was acquired in cruises on board the RV Ocean Survey. Altogether 680 km was covered by a 3.5 KHz sub-bottom using the Geopulse Geoacustic System. Further, four piston cores were collected to be scan and described in physic parameters and sedimentological content, respectively. The scan was performed using a Geotek Multi Sensor Core Logger (MSCL), which measure and register the Vp, gamma density and porosity of the core. After the scan, the cores were sample and analyzed on sedimentological grain size distribution determined by a Cilas 1064 laser analyzer. The results were integrated in order to identify common trends. Three major echo-characters were described in seismic records. Grain size analysis presented a good relationship with these echos. Echo A) Transparent, represented by a sharp bottom reflector with no sub-bottom reflectors scatter of a transparent layer mapped in seismic records. The grain size distribution is more balanced with a slight higher content of sands (55 %) in the correspondent core. Echo B) Stratified described as a series of parallel sub-bottom horizons, its percentage of clays is the highest of the three cores (77 %). The last echo, C) Reflexive, is a prolonged echo with one or none sub-bottom reflector. This echo is related to the highest percentage of sands of the three cores (61%). The sediment analysis was extrapolated all over the echo-characters extension to understand the transport regime over the area. This criteria, allied to isopach map, made possible to recognize three distinct zones inside the muddy accumulation.", "Based on the evolution of the tectonic plate and pregeography, the passive continental margin basins on the east coasts of Brazil experienced three prototype phases. Berremian intracontinental rift megasequence in lower cretaceous, comprising lacustrine sediments overlying Neocomian basalts, Aptian intercontinental rift basin, in which the laqoon transitional megasequence deposited, including two sedimentary units:the lower, mostly composed by carbonate and the upper represented by halite, and the drift phase, passive continental margin basin from Albian until the present-day, deposited with the marine megasequence. The Lower Cretaceous lacustrine calcareous black shale is the main source rocks of the giant oil and gas fields. The reservoirs include two sects:lower laqoon carbonatea nd upper, Tertiary and Cretaceous turbidites. The carbonate reservoirs is sealed by halite, while the turbidites are preserved by marine shale. The lower Cretaceous lacustrine source rocks starts to generate the oil and gas from Eocene-Miocene formed \"double insurance\" type models of giant oil and gas fields. If no salt windows existing, hydrocarbons migrated vertically along faults and are trapped mainly in the pre-salt carbonates. If salt windows exiting, hydrocarbons are accumulated in Upper Cretaceous-Tertiary turbidites which are packaged by marine facies shale." ]

[ "Technological changes in drilling and production, including emerging technologies Offshore drilling and production continue to benefit from significant technological advances. Sophisticated techniques now make it possible to drill multiple wells from a single drilling platform, while advances in real-time fibre-optic monitoring of the well bore is optimizing the reservoir performance and mitigating equipment failure risks (Beaubouef, 2019). Similarly, the use of predictive analytics and artificial intelligence tools is enhancing data analysis for detecting equipment breakdown and improving operational efficiency (Husseini, 2018). The use of FPSO vessels enables drilling in areas further offshore and without ready access to a pipeline network to transport oil and gas onshore. It has also opened previously inaccessible hostile environments, in particular in the higher latitudes and in the Arctic, to exploration and development. FPSO vessels are equipped to store hydrocarbons onboard and periodically transfer their load to tankers for transportation onshore. They can also disconnect from their moorings in case of adverse weather conditions, such as cyclones and hurricanes. Once the reservoirs are depleted, an FPSO vessel can be redeployed to a new prospective site. The global market for FPSO vessels is currently boosted by large investments in deepwater exploration and development in such areas as the coast of Brazil (Rystad Energy, 2019). Meanwhile, FPSO vessel design is evolving to enhance safety, minimize complexity and reduce fabrication and operation costs (Barton, 2018). Such technological advances have enabled exploration and production at uncharted depths and distance from shore. As of March 2019, the record for an ultradeep water exploration well was in depths of 3,400 m, off the coast of Uruguay, while the record for an operational production platform stood at 2,896 m, in the Gulf of Mexico (Barton and others, 2019)." ]

[ "B2493" ]

[ "Advances in knowledge and capacity New exploration and development in offshore areas remain a major source of increasing global oil and gas production. Technological advances in the past decade have encouraged exploration in deep and ultradeep waters further away from shore and enabled the discovery of significant new reserves. The water depth capabilities for offshore exploration increased from about 3,050 m to more than 3,350 m between 2010 and 2018, while production capability using floating platforms reached almost 2,900 m in 2018, up from 2,438 m in 2010 (Barton and others, 2019). Such technological advances have in part enabled the expansion of the offshore oil and gas sector to new regions, including the eastern Mediterranean and areas off the coast of Guyana. There have also been advances in understanding the potential environmental and social impacts of exploration and production activities on the surrounding environment and in the development of new approaches to mitigate impacts. For example, the United Kingdom of Great Britain and Northern Ireland has created a Marine Noise Registry to record human activities that produce loud impulsive noise (10 Hz– 10 kHz) in the seas around its territory. This initiative intends to create baseline data and to quantify the pressure on the environment from anthropogenic activities associated with hydrocarbon exploration and development, including seismic surveys, sub-bottom profiling and pile driving. Similarly, the SERPENT project, which stands for “Scientific and Environmental ROV (remotely operated vehicle) Partnership using Existing iNdustrial Technology”, is an example of international collaboration among the scientific community, environmental regulators and the oil and gas industry to gather and provide baseline information on ecosystems around offshore oil and gas installations using cutting-edge remotely operated vehicles that can operate in the deep ocean (SERPENT Project, 2020). More recently, the offshore oil and gas industry has contributed to the MRE sector by providing expertise for the construction, maintenance and decommissioning of utility-scale offshore wind projects. The design and structural engineering concepts for the floating wind turbines, which can significantly expand the development of wind power in deeper waters associated with higher wind resources, are largely influenced by deepwater oil and gas installations (International Renewable Energy Agency, 2016).", "Since the first World Ocean Assessment (United Nations, 2017a), the offshore oil and gas sector has continued to expand globally, in particular in deep and ultradeep waters. The use of tension leg platforms, spars and floating production, storage and offloading (FPSO) systems are key to such expansion. In the next decade, frontier regions such as the eastern Mediterranean, the east coast of South America (Brazil and Guyana), and the west coast of Africa could be the major growth drivers for offshore oil and gas exploration and production. There is an upward trend in decommissioning activity, in particular in mature regions, such as the North Sea and the Gulf of Mexico. Exploration and production practices continue to evolve to minimize potential impacts on the surrounding environment. The creation of regulatory capacity to manage offshore resources effectively, especially in frontier regions, requires significant commitment and long-term institutional investment. Technological innovation and sophisticated industrial capability built over decades by the offshore oil and gas sector are benefiting the emergence of the marine renewable energy (MRE) industry. A major thrust to the offshore hydrocarbon sector since the first Assessment is technological advancement in analysing offshore exploration and production data to enhance operational and financial efficiencies.", "Environmental impacts Offshore oil and gas exploration and development practices have evolved significantly in terms of minimizing impacts on the surrounding environment, but operational and accidental discharges and other environmental impacts still occur. Operational discharges include chemicals that arise from drilling activities, produced water, drilling muds and cuttings, as well as small amounts of treated domestic and sanitary wastes. Noise, seabed disturbance and loss of biodiversity are frequent further significant impacts. In addition, the installation of pipelines and related infrastructure also contributes to certain discharges into the marine environment. The decommissioning of installations can also be carried out with more or less severe environmental impacts, depending on removal methodologies and subsequent environmental follow-up measures. Produced water is a mix of oil and water from underground formations brought to the surface during production. The percentage of water, which is initially small, increases over time, while that of hydrocarbons decreases (Clark and Veil, 2009). The global average is estimated at three barrels of produced water for each barrel of oil (Khatib and Verbeek, 2002). Older wells, meanwhile, can display a ratio in excess of 50 barrels of produced water for each barrel of oil. According to a study by IFP Énergies Nouvelles, produced water is set to exceed 300 million barrels per day in 2020 at the global level, an increase of 20 per cent over 2008 levels. Most of the increase is expected from offshore oil and gas production (IFP Énergies Nouvelles, 2011). Disposal options include injection into the same formation from where the oil is produced, treating the produced water to meet a certain quality standard and then either discharging it into the environment or using treated water in oil and gas field operations. While most of the treated produced water onshore is injected underground, in the offshore environment, it is discharged in the marine environment. Such discharges are often regulated by local or national water quality regulations, such as the Clean Water Act in the United States. The United States Department of Energy is currently investing $4.6 million to fund projects that would advance produced water treatment technologies (Department of Energy, 2019). Although the funded projects focus on landbased drilling, many advances will be relevant to offshore oil and gas production. The emission of criteria pollutants related to platform or non-platform sources can have an impact on air quality in the vicinity of the drilling and production platforms. Platform sources comprise emissions from on-board equipment, such as boilers, natural gas engines and pneumatic pumps, while non-platform sources comprise emissions from pipe-laying operations, support and survey vessels and helicopters. In addition, open flaring of unwanted or excess gas from production platforms affects air quality.", "Increasing inputs of harmful material Offshore hydrocarbon industries Major disasters in the offshore oil and gas industry have a global, historical recurrence of one about every 17 years. The most recent is the Deepwater Horizon blowout of 2010, which spilled 4.4 million barrels (about 600,000 tons) of oil into the Gulf of Mexico. The other main harmful inputs from that sector are drilling cuttings (contaminated with drilling muds) resulting from the drilling of exploration and production wells, “produced water” (the water contaminated with hydrocarbons that comes up from wells, either of natural origin or through having been injected to enhance hydrocarbon recovery), and various chemicals that are used and discharged offshore in the course of exploration and exploitation. Those materials can be harmful to marine life under certain circumstances. However, it is possible to take precautions to avoid such harm, for example by prohibiting the use of the most harmful drilling muds, by limiting the proportion of oil in the produced water that is discharged or by controlling which chemicals can be used offshore. Such regulation has been successfully introduced in a number of jurisdictions. Nonetheless, given the growth in exploration and offshore production, there is no doubt that those inputs are increasing over time, even though exact figures are not available globally. Produced water, in particular, increases in quantity with the age of the field being exploited. Offshore mining The environmental impacts of near-shore mining are similar to those of dredging operations. They include the destruction of the benthic environment, increased turbidity, changes in hydrodynamic processes, underwater noise and the potential for marine fauna to collide with vessels or become entangled in operating gear.", "Technological advances As maritime activities have expanded and demands on resources have increased, technological advances have been key to increasing efficiencies, expanding markets and enhancing economic growth associated with activities. Such innovations have led to both positive and negative outcomes for the marine environment. Some advances in fishing technologies have led to an overall increase in capacity and, in many regions in Asia, Europe and North America, to overcapacity (Eigaard and others, 2014). Increased efficiencies generated through the use of technologies (also known as “technological creep”), for example, allowing for more efficient and accurate targeting of catches, have also resulted in effort gains within fisheries, thus contributing to overfishing of stocks (Finkbeiner and others, 2017). Conversely, advances in remote sensing, camera technologies, field deployment of genetic approaches to species identification and the use of artificial intelligence and machine learning approaches are now contributing to better monitoring of illegal, unregulated and unreported catches (Detsis and others, 2012), improving the reporting of catches (Ruiz and others, 2014), allowing for the traceability of products (Lewis and Boyle, 2017) and reducing wastage along supply chains (Hafliðason and others, 2012). Such technologies are also assisting in improved monitoring of the movements of fishing fleets, thus ensuring more effective management of protected areas (Rowlands and others, 2019). Technological advances, including digitalization, are modernizing energy efficiency by reducing energy use, shifting demand from peak to off-peak periods, increasing connectivity and providing flexible loads (which account for increasing shares of intermittent energy generation in the renewable sector), with positive outcomes in terms of greenhouse gas emissions (IEA, 2019a). Improvements in vehicle engines to burn fossil fuels more efficiently and innovations in solar and wind energy to produce clean energy are also helping to reduce greenhouse gas emissions.", "The views of engineering executives of six major international oil companies on the role of new technology in helping offshore operating companies meet demanding technical and economic challenges are presented. The companies are BP, Chevron, Elf Aquitaine, Mobil, Petrobras and Shell. The top ten technical advances of the 1980s are listed. Companies' views on the future needs of offshore operations are also summarized.", "Technological advancesAreas beyond national jurisdiction have become increasingly accessible owing to technological advancements that facilitate the exploration and exploitation of deep-sea resources, including biodiversity, minerals, oil and gas. Ensuring the sustainable development of those regions will require international cooperation in order to manage them effectively. Negotiations on a legally binding international instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of the marine biological diversity of areas beyond national jurisdiction are focused on ensuring the sustainable development and conservation of those areas (see also chap. 28). The International Seabed Authority has a dual mandate of promoting the development of deep-sea minerals, while ensuring that such development is not harmful to the environment. In areas beyond national jurisdiction, appropriate planning will be required to minimize impacts on the marine environment. The uptake of technological advances for accessing and utilizing marine resources, sustainably developing marine industries and effectively managing those uses is not globally even. Many regions, in particular those where the least developed countries are located, still lack access to technologies that can assist with the sustainable use of marine resources.Changing governance structures and geopolitical instabilityThere has been an increase in nationalism and protectionism over the past decade, contributing to changing trade agreements and, more recently, the implementation of tariffs on goods between specific countries. The Democracy Index fell from 5.55 in 2014 to 5.44 in 2019, largely driven by the regional deterioration of conditions in Latin America and sub-Saharan Africa. When indices for individual countries are calculated, stark regional differences are evident. Countries in Scandinavia, the far north of North America and the South-West Pacific had the highest indices, while those in sub-Saharan Africa, the Middle East and parts of Asia had the lowest. Those differences have an impact on the implementation of global and regional treaties and agreements, thereby affecting economic growth, the transfer of technologies and the implementation of frameworks for managing ocean use, including the development of national ocean-related policies. That, therefore, affects the sustainability of human activities and the protection of marine ecosystems in those areas.Climate changeClimate change effects are not uniform across the global ocean. A number of regions are warming at higher rates than the global average and are identified as marine hotspots (Hobday and Pecl, 2014). A number of those hotspots are located where human dependence on marine resources is greatest, such as South-East Asia and Western Africa, with substantive implications for food security compared with other regions. The Arctic is another region where the ocean is warming at 2 to 3 times above the global average (IPCC, 2018). Similarly, decreases in the pH and carbonate ion concentrations of the ocean, associated with ocean acidification, and other effects of climate change, such as deoxygenation, stratification and sea level rise, are regionally variable, with highly variable impacts on the marine environment. Regional differences in such changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9.", "Increased use of ocean space Offshore hydrocarbon industries The growth of the offshore oil and gas industry has increased the demand by that sector for access to ocean space within areas under national jurisdiction (including space for pipelines to bring the hydrocarbon products ashore). More than 620,000 km² (almost 9 per cent) of the exclusive economic zone (EEZ) of Australia is subject to oil and gas leases. In the United States, about 550,000 km² of the whole EEZ is subject to current oil and gas leases, including 470,000 km² in the Gulf of Mexico, representing 66 per cent of the EEZ of the United States in that area. When such significant proportions of the ocean areas under national jurisdiction are thus subject to such prior claims, overlaps in sectoral interests become inevitable. Offshore mining Offshore mining is currently confined to shallow-water coastal regions, although growing exploration activity is focused on deep-sea minerals. About 75 per cent of the world’s tin, 11 per cent of gold, and 13 per cent of platinum are extracted from the placer deposits near the surface of the coastal seabed, where they have been concentrated by waves and currents. Diamonds are also an important mining target. Aggregates (sand, coral, gravel and seashells) are also important: the United Kingdom, the world’s largest producer of marine aggregates, currently extracts approximately 20 million tons of marine aggregate per year, meeting around 20 per cent of its demand. Those activities are all concentrated in coastal waters, where other demands for space are high. Deep-water deposits that have generated continuing interest, but are not currently mined, include ferromanganese nodules and crusts, polymetallic sulphides, phosphorites, and methane hydrates. Demands for deep-sea space are likely to develop in the future.", "The economic consequences of increased trade and foreign investment, as a result of greater economic integration between countries, are on the global agenda. The interaction between coastal environment and the external sector is one of the most challenging topics. The convergence of these themes has being provoking a heated debate among people which are favorable and contrary to the thesis of the incompatibility between increased trade and maintaining a pattern of economic development and sustainable environment. Thesis expanded to the possible incompatibility between the movement of international financial capital and foreign direct investment and sustainability. Categorically, this applies to exploration and production (E & P) of oil in the Brazilian Pre-Salt formation. Brazil must inspect and monitor any process of exploration, mainly offshore, in the coastal territory of its jurisdiction. In this respect, it is noteworthy that PETROBRAS (the lead oil company in the country) has become the technology leader in deep and ultra-deep waters, which guarantees to Brazil at the time, the control of its maritime rich resources relating to exploration and exploitation of oil and natural gas. Thus, we recognize the issue of technological competition as a determinant for the productive internalization process. This process, especially among developed countries, should be understood as the result of technological capability, which multinational companies are able to appropriate due to the existence of \"overflows\" from the system. Therefore, we intend to clarify the extent to which Brazilian law \"protects\" the exploitation of natural resources, especially hydrocarbons, from a coastal environment approach.", "In a scenario of huge investments in the quest for new oil and natural gas discoveries, the oil industry has reached a consensus: no easy fields to be developed remain undiscovered, especially in offshore environments. New and old challenges on well drilling such as drilled extensions over 6000 m, sub-salt drilling, very narrow operational windows, operational problems like lost of circulation, stuck pipe, and kicks are aggravated when drilling in high pressure and high temperature (HPHT) environments. In the world's exploratory context, the occurrence of HPHT areas is an increasing trend. It is the materialization of the worst case scenario for well drilling and safety, formed by great challenges and operational, environmental, and economic risks. Field experience has shown that the economical risks have been overshadowed by the great premium target: increments on reserves. However, if the well safety aspect is dealt with the conventional approach, the oil industry is at risk of losing its investments, causing great impacts to the environment and also to the company's image. Since HPHT well construction costs are so much higher than those of traditional wells, the scope of knowledge and science on well safety, once limited to kick prevention and well control contingencies, are now an integral part of the technical and economic feasibility of well construction. Within this context, this work surveys the best HPHT techniques and procedures practiced by the oil industry, presents the new researches and trends and shares some valuable lessons learned on Petrobras' operations in Brazil and throughout the world." ]

[ "UV filters (UV-Fs) constitute a heterogeneous group of chemicals used as protection against the effects of UV radiation, widely used in all sort of goods and ubiquitous in the environment. The presence of these chemicals in fish is a matter of concern, because many UV-Fs display hormonal activity. In this study, muscle, gills, and liver from 11 Mugil liza individuals from the highly urbanized Guanabara Bay (Rio de Janeiro, Brazil) were analysed in order to detect eight UV-Fs and metabolites (4-dihydroxybenzophenone [BP1] (2-hydroxy-4-methoxybenzophenone [BP3], 4-methylbenzylidiene camphor [4MBC], ethylhexyl methoxycinnamate [EHMC], ethylhexyl dimethyl p-aminobenzoic acid [ODPABA], octocrylene [OC], 4-hydroxybenzophenone [4HB], and 4,4'-dihydroxybenzophenone [4DHB]) using liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Results showed that both target UV-Fs and metabolites were ubiquitous in the analysed tissues. Lower concentrations were observed in muscle and gills (3.07-31.6ngg-1 dry weight (dw)), whereas in liver significant amounts of metabolites (5.47-451ngg-1 dw) were present. With the concentrations determined in the fish, an estimation of the daily intake revealed that consumption of muscle in the diet represent from 0.3 to 15.2ng UV-Fs (kg body weight-1) d-1, higher than those reported in fish for selected persistent organic pollutants (POPs)." ]

[ "A1640" ]

[ "Shipyards impact on estuarine environments because of the use of antifouling paints and petroleum products, which release trace metals that may remain in their bioavailable or labile form. Regardless of its importance, the relation between continuous input of trace metals (hotspot area) and their availability in the water column has been scarcely studied. This study evaluated seasonal variations in the concentrations of labile fractions of metals in shipyards located in estuarine areas on the Brazilian subtropical coast. These fractions were determined by the Diffuse Gradients in Thin Films (DGT) technique. Maximum labile fraction concentrations of Cr (0.3 ?g L-1), Ni (2.2 ?g L-1) and V (2.0 ?g L-1) are directly related to (i) their specific source: antifouling paints (for Cr), metal and steel alloys (for Cr and Ni) and petroleum products (for V), besides (ii) periods of intensive traffic and vessel repair. Additionally, variations in labile fractions of Ni and V in the Patos Lagoon estuary were influenced by salinity, which is known to affect metal desorption from surface sediments in resuspension events. Even though Cr is affected by the same processes, it is available as Cr(III) and does not represent any ecological risk in the study areas. Although the areas under study are affected by variations in physical and chemical conditions, shipyards were effectively hotspots of trace metals in their labile fraction in various estuarine systems in southeastern and southern Brazil. Thus, they represent areas where Ecological Risk Assessment, mainly of V, should be carried out.", "High concentrations of total arsenic (As), even above the Brazilian legislative threshold for marine sediments of 70 mg kg-1, were found in beach sands and near-shore surface sediments. Two mechanisms (anthropogenic activities and sedimentary processes in the coastal waters) are responsible for this contamination. The anthropogenic impact includes releases from metallurgical plants, phosphate fertilizer plants and gold and iron mining. In the coastal area sedimentary processes redistributed the As from the sediment into the porous structure of calcareous marine algae. These enriched calcareous algae are transported over time to the beach by wave action. As in the Brazilian coastal environment, increased As levels were also observed in other coastal environments of South America such as Rio Loa (Chile), Barbacoas Bay (Colombia) and the Southern Pampa region (Argentina). Finally, arsenic levels in fish from Brazilian coastal waters and North Sea, which is also an As-contaminated area, were compared. In both areas, short term health effects from fish consumption are not expected, but a lifetime cancer risk cannot be excluded.", "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.", "The knowledge of metal behavior in the aquatic environment is important for understanding its effects in estuarine zones and mangrove areas. These important and precious ecosystems are affected by many different factors that may vary temporally and spatially. The present study investigated the spatial and temporal variation of physicochemical parameters (pH, dissolved oxygen, temperature, salinity, etc.) and metal concentrations (Zn, Fe, Ni, Cu) at three different locations along the Todos os Santos Bay, North East Brazil, by analyzing surface water, sediment and mangrove oysters (Cassostrea rhizophorae (Guildin, 1828)). Metal concentrations in surface waters and sediments differed between the three sampling times (March and August 2014; January 2015) and locations and were affected by fluctuating physicochemical parameters, which in this way also affected the metal bioconcentration in the oysters. The pH of the surface waters, for example, increased from the 1st to the 3rd sampling time while the concentrations of Zn and Fe decreased during the same period. The sediment concentrations of Zn and Fe were strongly correlated with organic matter content. These results suggests that seasonality as well as the different water and sediment properties along the bay directly affect metal concentration and bioavailability in the environment.", "Human health can be affected by many aspects of food from the sea. Some problems are the result of pollutants (such as mercury) or pathogens (often from sewage and ballast water) discharged into the sea and taken up by plants, fish and shellfish that are harvested for human consumption (Takahashi and others, 2008). Others are the result of toxins generated by, or viruses found in, various biota in the sea and taken up by some fish and shellfish (see chaps. 10 and 11). According to WHO, mercury is one of the 10 most poisonous substances to human health (WHO, 2013). A principal form of mercury to which humans are exposed is organic methyl mercury (MeHg). The principal source of inorganic mercury in the sea is the burning of fossil fuels (see chap. 11). Such mercury is converted into MeHg by microbes in the aquatic environment, where it bioaccumulates in food webs. In humans, MeHg exposure occurs predominantly through the consumption of seafood. MeHg is a neurotoxin and is particularly harmful to fetal brain development. A large body of research has demonstrated a link between exposure to MeHg in the womb and developmental neurotoxicity (e.g., deficits in fine motor skills, language and memory) among populations that consume seafood regularly. A review of studies in 43 countries showed that pooled average biomarkers suggested an intake of MeHg that was: Several times above the Food and Agriculture Organization of the United Nations-WHO reference level for consumption in fish-consuming inhabitants of coasts and riverbanks living near small-scale gold-mining installations; Well over the reference level in consumers of marine mammals in Arctic regions; Approaching the reference level in coastal regions in South-East Asia, the western Pacific and the Mediterranean. Although the two former groups have a higher risk of neurotoxicity than the latter, the coastal regions of South-East Asia are home to very large populations. In all three areas, many of the samples showed levels of MeHg intake in excess of the reference value (Sheehan and others, 2014). Other experts, while recognizing the threat from MeHg, argue that it is important also to balance the benefits from fish-derived lipids with possible risks when considering fish as part of the diet of mothers and their children (Myers and others, 2015). Certain fish species have been identified as being at greater risk for MeHg exposure than others (e.g., MeHg biomagnifies in the aquatic food chain and larger predatory fish, such as shark, swordfish, king mackerel and certain species of tuna), so making appropriate choices in fish consumption can lead to increasing the benefits of eating seafood while decreasing the potential risk (Silbernagel and others, 2011).", "Antifouling biocides, such as irgarol and diuron, are commonly used in antifouling paints. Recently, studies carried out in a Brazilian region of ecological concern have warned for extremely high levels of these biocides. So, this work focused on a 4-year (2015–2018) evaluation considering the occurrence, environmental fate, seasonal variations and ecological risk assessment of irgarol and diuron in water and sediment from São Marcos Bay, Brazil, which is an area of international relevance located in the Amazon region. The results showed the ubiquitous presence of antifouling biocides, as well as their wide distribution along the bay. The concentration range of irgarol was between <0.8 and 89.4 ng L?1 in water and between <0.5 and 9.2 ng g?1dw in sediments, whereas diuron showed a range between <1.4 and 22.0 ng L?1 in water and between <2.0 and 15.0 ng g?1dw in sediments. The distribution of the biocides was mainly related to the intense Bay hydrodynamics. The environmental risk assessment showed that irgarol and diuron posed “high risk” to the aquatic biota of São Marcos Bay, exceeding international Environmental Quality Guidelines. The results represent a robust study on the environmental fate of such biocides and intend to be a useful data source for eventual legislation since regulation concerning antifouling substances is necessary for Brazil.", "Manganese (Mn) is an abundant element in terrestrial and coastal ecosystems and an essential micronutrient in the metabolic processes of plants and animals. Mn is generally not considered a potentially toxic element due to its low content in both soil and water. However, in coastal ecosystems, the Mn dynamic (commonly associated with the Fe cycle) is mostly controlled by redox processes. Here, we assessed the potential contamination of the Rio Doce estuary (SE Brazil) by Mn after the world's largest mine tailings dam collapse, potentially resulting in chronic exposure to local wildlife and humans. Estuarine soils, water, and fish were collected and analyzed seven days after the arrival of the tailings in 2015 and again two years after the dam collapse in 2017. Using a suite of solid-phase analyses including X-ray absorption spectroscopy and sequential extractions, our results indicated that a large quantity of MnII arrived in the estuary in 2015 bound to Fe oxyhydroxides. Over time, dissolved Mn and Fe were released from soils when FeIII oxyhydroxides underwent reductive dissolution. Due to seasonal redox oscillations, both Fe and Mn were then re-oxidized to FeIII, MnIII, and MnIV and re-precipitated as poorly crystalline Fe oxyhydroxides and poorly crystalline Mn oxides. In 2017, redox conditions (Eh: -47 ± 83 mV; pH: 6.7 ± 0.5) favorable to both Fe and Mn reduction led to an increase (~880%) of dissolved Mn (average for 2015: 66 ± 130 µg L-1; 2017: 582 ± 626 µg L-1) in water and a decrease (~75%, 2015: 547 ± 498 mg kg-1; 2017: 135 ± 80 mg kg-1) in the total Mn content in soils. The crystalline Fe oxyhydroxides content significantly decreased while the fraction of poorly ordered Fe oxides increased in the soils limiting the role of Fe in Mn retention. The high concentration of dissolved Mn found within the estuary two years after the arrival of mine tailings indicates a possible chronic contamination scenario, which is supported by the high levels of Mn in two species of fish living in the estuary. Our work suggests a high risk to estuarine biota and human health due to the rapid Fe and Mn biogeochemical dynamic within the impacted estuary.", "The distribution of planktonic foraminifera in box-core tops under the influence of a western boundary upwelling system along the southeastern Brazilian continental margin was examined to evaluate the similarity percentage (SIMPER) and to create a biofacies model for paleoenvironmental applications. Species associated with warm and oligotrophic water were distributed in the Rio de Janeiro sector of the Campos Basin, while productive water species were most abundant in the Rio de Janeiro sector of the Santos Basin, and cold-water species were most abundant in the Cabo Frio Upwelling System (CFUS). Four major biofacies are associated with the oceanographic setting of the CFUS: one from the Campos Basin (A - Brazil Current front), one from the Santos Basin (B - mixture of coastal and oceanic waters), and two associated with the Cabo Frio High in the northern biofacies (C) and southern biofacies (D). The distribution of biofacies C and D was associated with temperature differences. Biofacies C represents a mixture of upwelling and tropical waters, while biofacies D represents a mixture of cold, nutrient-rich and Santos Basin waters. These biofacies were also defined in core CF10-01B, in which six main paleoceanographic phases were characterized during the last 9 cal kyr, predominantly showing alternating dominance between biofacies C and D From 9.0 to 5.0 cal kyr before the present (BP), the system was dominated by biofacies C. Between 4.0 and 3.5 cal kyr BP, biofacies D was dominant. Between 3.5 and 2.5 cal kyr BP, a strong influence of coastal waters and weakened upwelling activity were indicated by the dominance of biofacies B + C + D. The last 2.5 cal kyr was dominated by biofacies D. The SST in this core was reconstructed using the Modern Analog Technique (MAT), which revealed 0.35. °C of variability, indicating no SST changes during the Holocene. The weak sensitivity of the MAT was due to the interplay among different oceanographic features.", "Aquaculture production is continuously growing worldwide, and marine fish farming in Brazil is still in its infancy. Intensive farming conditions may cause physiological stress to the cultured organism, which can be evaluated by citogenotoxic biomarkers. The aim of this study was to assess the genotoxic effect of the rearing conditions in red blood cells of juvenile cobia Rachycentron canadum by using comet assay and micronucleus and other nuclear abnormalities assay. Juvenile cobia were reared for 13 weeks in indoor tank with open water circulation and in near shore cage. The comet assay and the nuclear abnormalities assay detected higher DNA damage and higher nuclear abnormalities frequency in erythrocytes of fish reared in the indoor tank. Results showed that two methods are complementary. Additionally, cobia were injected with ß-naphthoflavone (BNF) at concentrations of 2mgkg-1 and 10mgkg-1 in laboratory controlled conditions, and maintained for 7 days in separate tanks to better understand the response mechanisms of this species to a toxic substance. The comet assay did not detect any significant differences between BNF injected and control fish, whereas nuclear abnormalities assay showed significant differences between BNF injected and the control groups. The damages identified by the comet assay are repairable breaks in the DNA strands, whereas nuclear abnormalities may be permanent. Possibly the period of maintenance after injection was enough to clean BNF from the organisms and to repair the breaks in the DNA strands. As cobia seems to respond very well to genotoxic elements, comet assay and nuclear abnormalities assay would be useful tools to monitor farming conditions.", "This long-term study, performed during the years 2003-2005 and 2008-2009, investigated the carbon (C), nitrogen (N), and phosphorus (P) contents of the phyto- and zooplankton communities and the nutrient regime of Cabo Frio Bay, SE Brazil. The information intends to serve as baseline of the plankton C, N, and P stoichiometry for the calibration of biogeochemical and ecological models in support to future findings related to the local and regional phenomena of climatic change. Cabo Frio Bay is a small semienclosed system set adjacent to a region subject to sporadic coastal upwelling. Zooplankton exhibited average annual C, N, and P contents of 11.6 ± 6.9 %, 2.8 ± 1.8 %, and 0.18 ± 0.08 %, and phytoplankton (>20 ?m) 6.8 ± 6.0 %, 1.6 ± 1.5 %, and 0.09 ± 0.08 %, respectively. The C/N/P ratios correspond to the lowest already found to date for a marine environment. The low C contents must have been brought about by a predominance of gelatinous zooplankton, like Doliolids/ Salps and also Pteropods. Average annual nutrient concentrations in the water were 0.21 ± 0.1 ?M for phosphate, 0.08 ± 0.1 ?M for nitrite, 0.74 ± 1.6 ?M for nitrate, and 1.27 ± 1.1 ?M for ammonium. N/P ratios were around 8:1 during the first study period and 12:1 during the second. The plankton C/N/P and N/P nutrient ratios and elemental concentrations suggest that the system was oligotrophic and nitrogen limited. The sporadic intrusions of upwelling waters during the first study period had no marked effect upon the systems metabolism, likely due to dilution effects and the short residence times of water of the bay." ]

[ "Circular to elliptical topographic depressions, isolated or organized in trails, have been observed on the modern seabed in different contexts and water depths. Such features have been alternatively interpreted as pockmarks generated by fluid flow, as sediment waves generated by turbidity currents, or as a combination of both processes. In the latter case, the dip of the slope has been hypothesized to control the formation of trails of downslope migrating pockmarks. In this study, we use high-quality 3D seismic data from the offshore Ceará Basin (Equatorial Brazil) to examine vertically stacked and upslope-migrating trails of depressions visible at the seabed and in the subsurface. Seismic reflection terminations and stratal architecture indicate that these features are formed by cyclic steps generated by turbidity currents, while internal amplitude anomalies point to the presence of fluid migration. Amplitude Versus Offset analysis (AVO) performed on partial stacks shows that the investigated anomalies do not represent hydrocarbon indicators. Previous studies have suggested that the accumulation of permeable and porous sediments in the troughs of vertically stacked cyclic steps may create vertical pathways for fluid migration, and we propose that this may have facilitated the upward migration of saline pore water due to fluid buoyancy. The results of this study highlight the importance of gravity-driven processes in shaping the morphology of the Ceará Basin slope and show how non-hydrocarbon fluids may interact with vertically stacked cyclic steps." ]

[ "A1600" ]

[ "Shallow and insufficient soil support may lead to upheavel buckling of heated pipelines in shores approach areas. This article presents a nume rical model to simulate the thermomechanical buckling of buried heated pipelines in shore approach areas. An analysis adopting geometrical, physical, and operational data is also carried out for a particular Petrobras project, taking in situ geophysical survey, geotechnical, and oceanographic information into account. The discussion also addresses the influence of the sediment transport after the opening of the trench and required backfilling with a heavier soil.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "Passive margins underlain by a salt detachment are typically interpreted as kinematically linked zones of updip extension and downdip contraction separated by a zone of translation above a smoothly dipping base of salt. However, salt flow is affected by the base-of-salt geometry across which it flows, and early-stage gravity gliding induced by basin tilt may be complicated by the presence of salt-thickness changes caused by the pre-existing base-salt relief. We investigate these effects using physical models. Dip-parallel steps generate strike-slip fault zones separating domains of differential downslope translation and structural styles, provided the overburden is thin enough. If the overburden is thicker, it resists breakup, but a change in the structural trend occurs across the step. Steps with mild obliquity to the dip direction produce transtensional and transpressional faults in the cover separating structural domains. Deformation complexity in the overburden increases where base-salt steps strike at a high angle to salt flow, and it is especially dependent on the ratio between the thick (T) and thin (t) salt across the step at the base of salt. Where the salt-thickness ratio (T/t) is high, basal drag generates major flux mismatches, resulting in a contractional thickening of the salt and associated overburden shortening in thin salt above a base-salt high block. Shortening is transient and superseded by extension as the salt thickening allows the flow velocity to increase. When transitioning off a base-salt high block into a low block, the greater flux within the thick salt results in a monocline with extensional and contractional hinges. Structures are further deformed as they translate through these hinge zones. Our physical models demonstrate that extensional diapirs and compressional fold belts can be initiated anywhere on a slope as the salt accelerates and decelerates across base-salt relief. A fold belt from the Campos Basin, offshore Brazil, is used to illustrate these processes.", "This work discusses soil-structure interaction applied to thermal snaking of shallowly buried pipelines embedded in very soft clay. The main motivation of this research was the accident that occurred in January 2000 in Rio de Janeiro where more than 1 million liters of crude oil has been spilled into the Guanabara Bay. In that way, a set of comprehensive centrifuge tests has been undertaken in order to assess the lateral resistance of the soil. The results were compared with numerical simulations of the same centrifuge scenarios using a software developed by PETROBRAS.", "High concentrations of total arsenic (As), even above the Brazilian legislative threshold for marine sediments of 70 mg kg-1, were found in beach sands and near-shore surface sediments. Two mechanisms (anthropogenic activities and sedimentary processes in the coastal waters) are responsible for this contamination. The anthropogenic impact includes releases from metallurgical plants, phosphate fertilizer plants and gold and iron mining. In the coastal area sedimentary processes redistributed the As from the sediment into the porous structure of calcareous marine algae. These enriched calcareous algae are transported over time to the beach by wave action. As in the Brazilian coastal environment, increased As levels were also observed in other coastal environments of South America such as Rio Loa (Chile), Barbacoas Bay (Colombia) and the Southern Pampa region (Argentina). Finally, arsenic levels in fish from Brazilian coastal waters and North Sea, which is also an As-contaminated area, were compared. In both areas, short term health effects from fish consumption are not expected, but a lifetime cancer risk cannot be excluded.", "The present study characterizes the quality of sediments from the Paranaguá Estuarine Complex (South Brazil). Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs) were determined in sediment samples together with a series of different in vitro bioassays. The fish hepatoma cell line (PLHC-1) was used to determine the presence of cytotoxic compounds and CYP1A- and oxidative stress-inducing agents in sediment extracts. Ovarian microsomal fractions from sea bass (Dicentrarchus labrax) were used to detect the presence of endocrine disrupters that interfered with the synthesis of estrogens (ovarian CYP19). Despite the relatively low levels of pollutants and no evidence of negative effects based on guideline levels, sediments collected close to harbors were enriched with CYP1A-inducing agents and they showed higher cytotoxicity. In contrast, sediments from internal areas inhibited CYP19 activity, which suggests the presence of endocrine disrupters at these sites. Overall, the selected bioassays and the chemistry data led to the identification of potentially impacted areas along the Paranaguá Estuarine Complex that would require further action to improve their environmental quality.", "With the application of new technologies for processing and interpreting seismic data, PETROBRAS, in recent years, has achieved great success in the discovery of giant oil fields underlying thick layers of rock salt. Due to the mechanical behavior of these rocks, subject to the creep phenomenon, it was developed a large research and development project in order to determine the creep properties of these rocks and the application of computational simulations to predict the behavior of deep wells during the drilling of these layers. If on one hand the salt layers, with thicknesses ranging from 2000m to 5000 m, are a challenge in drilling activity, they can be considered in the logistic flow of gas and final destination of CO2. The rock salt has negligible porosity when compared to other geomaterials, which guarantees excellent impermeability to most fluids and gases, even under high pressures. Another phenomenon associated with rock salt is the process of self-healing. Taking advantage of these physical-chemical and structural properties of rock salt, caverns opened by dissolution in salt domes have been used for storage of hydrocarbons and other products. Considering the large regional thicknesses and continuity of rock salt overlying the presalt reservoirs, PETROBRAS is studying the strategy and technical and economic feasibility for the use of underground storage of natural gas and CO2 in salt caverns. Despite being a technology already dominated worldwide is unprecedented, the offshore application in deep and ultra-deep water.", "Amazonian aquatic systems are usually associated with pristine waters, however, irregular urban occupation of the hydrographic basins and sewerage deficiencies may lead to point and diffuse contamination. Sewage contamination in intertidal surface sediments from the Guajará Estuary, Brazilian Amazon coast, was evaluated using a set of steroids as biomarkers. Sediments collected along the urbanized margin were also analyzed for chlorophyll a, total organic carbon and grain sizes. Coprostanol, the main fecal sterol, was found at concentrations varying from 0.06 to 7.93 µg g-1 dry sediment, following the sequence Tucunduba > Ver-o-Peso > Porto da Palha > Tamandaré > Icoaraci > Miramar. Mixed sources of organic matter and coastal process probably concurred to produce weak correlations among the parameters. Plant derived sterols, including n-C30 alcohol and ?-amyrinyl alkanoates, were clearly abundant, but they did not preclude the use of other steroid signals to the assessment of sewage contamination. High values of the steroid indexes involving 5? and 5? stanols and stanones highlighted sewage contamination at the sites with the lowest absolute coprostanol concentrations. The predominance of 5? stanols indicated a chronically sewage contamination of the area.", "The development of Brazil Offshore fields using flexible pipes took the advantage of the possibility to move around lines, anticipate the production and postpone the decision of where exactly the development phase wells should be placed, making the drilling campaign easier, cheaper and faster. For the Pre-Salt fields, mainly in Santos Basin, it is observed high concentrations of H2S and CO2, two major impact contaminants for the metallic layers of the flexible pipe. A new failure mode by SCC is the most concerning one and have several approaches either focused on the installed fleet or focused in the next pipes to be delivered. SCC is a condition that induces cracks in the pipes metallic layers and need three elements to happen: water, stress and susceptible material. If one of these three elements is suppressed, the phenomena is not to happen. This paper will cover and present a design of a seal tight end fitting also with capabilities to be seal tested from the shop during the factory acceptance test and further means to identify if the flexible pipe section is flooded or dry visually, using ROV. This information is key for the integrity management of the flexible pipes applied to pre salt fields to assure the most extent of the service life.", "Extreme climate events A tropical cyclone is the general term for a strong, cyclonic-scale disturbance that originates over the tropical ocean. Based on one-minute maximum sustained wind speed, the cyclonic disturbances are categorized into tropical depressions (? 17 m/s), tropical storms (18–32 m/s) and tropical cyclones (? 33 m/s, category 1 to category 5) (Knutson and others, 2010). A tropical cyclone is called a hurricane, typhoon or cyclone, depending on geographic location. Anthropogenic climate change has increased precipitation, winds and extreme sea level events associated with a number of observed tropical cyclones. For example, studies have shown that the rainfall intensity of tropical cyclone (Hurricane) Harvey increased by at least 8 per cent (8–19 per cent) owing to climate change (Risser and Wehner, 2017; Van Oldenborgh and others, 2017). Anthropogenic climate change may have contributed to a poleward migration of maximum tropical cyclone intensity in the western North Pacific in recent decades related to anthropogenically forced tropical expansion (Sharmila and Walsh, 2018). There is emerging evidence of a number of regional changes in tropical cyclone behaviour, such as an increase in the annual global proportion of category 4 or 5 tropical cyclones in recent decades, extremely severe tropical cyclones occurring in the Arabian Sea, cyclones making landfall in East and South-East Asia, an increase in frequency of moderately large storm surge events in the United States since 1923 and a decrease in frequency of severe tropical cyclones making landfall in eastern Australia since the late 1800s. There is low confidence that they represent detectable anthropogenic signals. Extreme wave heights, which contribute to extreme sea level events, coastal erosion and flooding, have increased in the Southern Ocean and the North Atlantic Ocean by about 1.0 cm per year and 0.8 cm per year over the period 1985–2018 (Young and Ribal, 2019). An increase in the average intensity of tropical cyclones, and the associated average precipitation rates, is projected for a 2°C global temperature rise, although there is low confidence in future frequency changes at the global scale (Yamada and others, 2017). Rising sea levels will contribute to higher extreme sea levels associated with tropical cyclones in the future (Garner and others, 2017). Projections suggest that the proportion of category 4 and 5 tropical cyclones will increase (Knutson and others, 2015; Park and others, 2017). Such changes will affect storm surge frequency and intensity, as well as coastal infrastructure and mortality. Investment in disaster risk reduction, flood management (ecosystem and engineered) and early warning systems decreases economic loss from tropical cyclones that occur near coasts and islands. However, such investments may be hindered by limited local capacities (e.g., ageing infrastructure and other non-climatic factors) that, for example, can lead to increased losses and mortality from extreme winds and storm surges in developing countries despite adaptation efforts. There is emerging evidence of increasing risks for locations affected by unprecedented storm trajectories. Management of risk from such changing storm trajectories and intensity proves challenging because of the difficulties of early warning and its receptivity by affected populations." ]

[ "Most of Brazilian oil and gas reserves are located in offshore deep waters. In this scenario, high well productivity is essential. Artificial lift will certainly play an important role in the exploitation of those deep water fields. This paper describes the most important artificial lift methods, their main characteristics and application niches. It also shows what Petrobras is currently doing in order to make them available for subsea use. The following methods are analyzed: gas lift; electrical submersible pump; hydraulic jet pump; progressing cavity pump; multiphase pump; subsea separation system." ]

[ "A985" ]

[ "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "Igneous rocks are widely developed in many hydrocarbon-bearing sedimentary basins in Brazil, and some igneous rocks play positive roles in the oil and gas accumulation process. But so far, no industrial oil or gas flow is discovered in igneous rocks in Brazilian onshore basins. At present, in some literatures published by some researchers, cases of igneous reservoirs in Brazil are inaccurate. The lithology of reservoirs in the Igarape Cuia oil and gas field, the oil and gas field of Urucu and the Barra Bonita gasfield, were previously thought to be volcanic rocks, but now are clastic rocks according to studies, and the igneous rocks in these three oil and gas field can only be acted as indirect and direct cap rocks. Furthermore, igneous rock reservoirs in the Campos Basin and Santos Basin in the Brazilian offshore are briefly analyzed. The representative Badejo oilfield in the Campos Basin has igneous rock reservoirs dominated by basalts which are intercalated with thin layers of volcaniclastic and sedimentary rocks, the storage space are vesicules, fractures and vugular pores, and the porosity of hydrocarbon bearing interval basalt reservoirs ranges from 10% to 15%. In addition, for the Santos Basin, igneous rocks in this basin are dominated by basic rocks, some alkaline intrusive rocks develop good micro spaces, mainly crystal moldic pores, inter- and intra-crystal dissolution pores and fractures, better reservoir intervals are often concentrated such as at sections near to unconformity surfaces and can have porosity of 6%–9% or higher; local pre-salt igneous rock reservoirs in the Santos Basin have the necessary conditions for hydrocarbon accumulation and it will be a new target layer for hydrocarbon exploration.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "In 1939, the Lobito oil field, Brazil's first, was discovered. During the 1950's, 15 significant fields were discovered. In 1975, the exclusion of private capital in Brazilian oil operations came to an abrupt end. Petrobras was authorized to seek service contracts with foreign oil companies in regions not under exploration. The Campos basin is the most productive oil province in Brazil, accounting for about 62% of current production. The Campos basin is an Atlantic-type basin, typical of a passive continental margin.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "Campos Basin, the main production province in Brazil, was discovered in 1974. It is located on the North coast of the Rio de Janeiro State and comprises an area of around 115,000 km2 (28,400 acres), as shown in Figure 1. The producing oil fields are between 70 and 150 km (43 to 93 miles) far from the seashore. It started its production on August 13th, 1977 with 10,000 bopd (barrels of oil per day) from the well 1-EN-01-RJS, which produced to a semi-submersible platform; this well has produced nearly 35 million barrels of oil until February 1998, when it was shutdown for economical reasons. Today, after more than twenty-five years of continuous operation, the overall production system comprises 13 fixed platforms and 24 Floating Systems distributed among 42 oil fields, which account for the production of 1.21 million bopd - which corresponds to more than 80% of Petrobras oil production, plus 18.9 million m3 of gas per day - or 43% of the gas production (as of December 2002). Such an evolution was supported by investments in exploration and production development, in deepwater technology developments and in continuous management improvement. This paper describes the main driving forces to exploit Campos Basin - especially its deep and ultra-deepwaters fields, the technological and production developments performed, the experience accumulated by Petrobras along these 25 years of operations as well as its contribution to the global oil industry.", "The 3 million bpd of crude oil produced globally in deep waters represent only 4% of the total explored volume by the petroleum industry. However, the expectation of a large increase in demand for energy in the coming decades is attracting new investments by oil companies. Although a matter that dominates the scene in Brazil, E&P in deep waters has marginal international participation and encounters unexplored frontiers. The global oil industry has discovered about 60,000 million bbl of petroleum in deep waters, half of which since 1995 has occurred in Brazil, Gulf of Mexico, and Western Africa, according to one study. In a study by the Total company, 90% of the global reserves of petroleum in deep waters of about 50,000 million bbl, are to be found in the \"Golden Triangle\" of the petroleum industry, namely, Brazil, Gulf of Mexico, and Western Africa. There is a consensus that the high prices for petroleum are an indication that exploration for petroleum in deep waters off Latin America may significantly increase the reserves of the region. The world consumes about 75,000 million bpd of crude oil and 6.5 MMM cu m/day of natural gas. Hardly some 3 MM bpd of crude oil are produced in deep waters or 4% of the total volume explored. In the coming three decades the demand for energy is expected to increase by two thirds and between now and 2015 the production in deep waters could triple reaching over 8 MM bpd. In the Offshore Magazine study on FPSO, of the 106 FPSO now operating in 23 countries, 16 are in Brazil. Of the 106 FPSO, 13 operate in waters at greater than 1,000 m depth. Of these 13, 7 are in Brazil, 4 in Angola, and 2 in Nigeria. In 2006, 21 FPSO are being built or being converted in the world and 56 FPSO are being bid for, will be bid for, or are in the final stage of conception and design. The large part of these projects is Brazilian. From now to 2010, 2,011 new underwater production projects will be initiated in Brazil that will include about 20 new platforms. In addition to offshore Brazil, Petrobras is active offshore Argentina and Colombia and has joined with large companies to explore in deep waters in the Gulf of Mexico.", "Construction of the Rio de Janeiro-Sao Paulo gas line for Petrobras represents a landmark within Brazilian energy development since the system interconnects the main South America industrial center located in Sao Paulo state to the Campos basin. This basin, one of the gas and oil offshore producing areas, has the fastest development in the world and is responsible for over 50% of Brazilian oil and natural gas production. This paper discuses the various terrain characteristics, logistics and construction details for this project.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels." ]

[ "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion." ]

[ "A949" ]

[ "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "In general, Oil Companies need a contract with the government to have legal rights to carry out Exploration and Production (E&P) projects. In this work, we discuss contractual and economic issues in (E&P) sector in Brazil and the dynamics of uncertainties throughout the stages of an E&P project. This study uses Petroleum Resource Management System - PRMS (SPE, et al., 2007) concepts, its reserve categorization and indicators to measure uncertainty in oil and gas projects. First, we analyze complexities resulting from different contractual regimes and their limits - time, area and cumulative production - as well as the impact on the management of Field Development Plans (FDP). Under these limits, not all production and resources are included in the contract, affecting volume amount, property rights and fiscal regime. Time limits affect decisions about the remaining reserves after the end of contract, while area issues occur when reservoirs extend beyond the geographical boundary of an exploratory block. Cumulative production limit appears in the Transfer of Rights Agreement (TRA), which authorized the Brazilian Government to assign 5 billion barrels of oil equivalent to Petrobras in 2010. The National Agency of Petroleum (ANP) promoted technical studies that indicated the recoverable volume in the area of TRA exceeds the limits originally agreed. In the second part, we use the 12-step integrated decision analysis methodology by Schiozer, et al. (2015) and PRMS reserve indicators to describe the dynamics of uncertainties throughout exploration, development and production phases. Through reservoir simulation and the optimization of a production strategy, we measured the key reserve indicators in different phases of a project. The increment of developed reserves due to the introduction of wells, in the development, and the reclassification of resources, in the management phase, are assessed probabilistically. The novel information of this work is the use of the PRMS international standard and the 12-step methodology to not only calculate reserves, but also describe the dynamics of uncertainties throughout a Development Project and to qualify complex contractual and economic issues.", "Partnerships and JV are quite common in the Oil and Gas industry. In the offshore activity, in order to reduce the risks of capital intensive projects oil companies used cooperate entering into JV agreements. In addition, local content requirements and entry barriers in new markets, are some reasons to create partnerships between international and domestic companies. Brazil is not different. It is a market that has some challenges in which the cooperation with a local partner could reduce the risks for a foreign investor. In the oil companies' side, Petrobras is the target partner for an international oil company, because of its technical reputation and successful implementation of ultra-deep operations. In other segments, Petrobras, can be the main client, sole supplier or big competitor. Petrobras is subject also to laws and regulations to hire contractors, there are local content requirements regulations, industry-specific tax, fiscal and customs regimes, among other risks and opportunities in which the cooperation with a domestic company could help to solve in a more efficient way. The author of this paper describes the advantages of the partnership for international and domestic companies which want to invest in Brazil in the several perspectives along the oil and gas supply chain.", "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability.", "Petrobras has indulged in R&D programs and technology partnerships with key contractors, opening up offshore development opportunities within Brazil. One of the main contractors helping Petrobras to achieve its goals on Marlim is FMC Technologies Inc. The subsea separation, pumping, and water reinjection system will be installed in 899 m water depth to meet the challenge of increased water production. Petrobras has awarded FMC an additional subsea separation and boosting system contract for the brownfield Congro and Corvina development, also in the Campos basin. Petrobras has recently completed its successful Procap 3000 research program, which was a driver for many of the operator's deepwater advances. In the Future Vision Procap program, the company is laying emphasis on the pursuit of solutions that could significantly alter current standards for developing deepwater fields.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "The Petroleo Brasileiro SA (Petrobras), a state-owned oil company utilizes its floating production storage and offloading (FPSO) P-50 vessel to 16 production wells at the Albacora Leste field in Campos basin. FPSO symbolizes Brazil's plans to reach oil self-sufficiency by mid-2006. The FPSO will process oil pumped from the field 150 km off Rio de Janeiro and each peak production of 180,000 b/d by August, which represents around 10% of Brazil's crude oil output. The P-50 will also be able to handle 6M cu m/day of natural gas. The P-50 and P-34, also an FPSO, are to begin processing 20,000 b/d of oil at Jubarte field. They will raise national production to 1.9M b/d in 2006, surpassing domestic needs and making Brazil reach oil self-sufficiency." ]

[ "The continental margin of Brazil in intraplate South America exhibits a seismicity rate 70% higher than the average stable continental regions. This margin encompasses Northeastern Brazil, where most of the seismicity and active faults concentrate along the coast. The current study presents an integration of high-resolution aeromagnetic, seismological, and geological data to investigate the relationship between the seismicity and basement fabric in two areas in the northern part of the Precambrian Borborema Province. Our investigation indicates a relation between the metamorphic basement foliation and two seismogenic faults. In the first area adjacent to the Transbrasiliano Lineament, the largest continental suture zone in the South American platform, the magnetic anomaly patterns indicate that the regional basement grain and structural elements are E-W-oriented, which coincides with the strike of the E-W-striking, strike-slip Riacho Fundo Seismogenic Fault. In the second area, the magnetic anomaly patterns also coincide with the NE-SW-striking, strike-slip Samambaia Fault, and a swarm of chalcedony-quartz veins. Euler deconvolution used to estimate the source depth of the magnetic anomalies indicates that the faults in both cases could be longer and deeper than segments illuminated by the present-day seismicity. Although these findings are difficult to use as predictive tools, they indicate that the basement fabric could be reactivated by seismicity in continental interiors, as previously discussed in several cases in Brazil." ]

[ "A1577" ]

[ "In passive continental margins, the brittle reactivation of shear zones and their role in the deformation and deposition of sedimentary basins are still a matter of debate. In this research, we investigated the role of the brittle reactivation of Precambrian shear zones in the nucleation of rift and postrift faults in the onshore portion of the Sergipe-Alagoas and Pernambuco basins in northeastern Brazil. We combine and interpret a dataset of aeromagnetic and topographic data, associated with reflection seismic and borehole data, to analyze the evolution of a portion of the Atlantic continental margin of Brazil. Our results indicate that in the crystalline basement, the magnetic lineaments are correlated with ductile structures as shear zones, and the continuity of these lineaments in the Sergipe-Alagoas and Pernambuco basins is interpreted as the shear zones below the sedimentary cover of these basins. We document the following phases of the brittle reactivation of basement shear zones: (1) the opening of the South Atlantic Ocean in the Early Cretaceous under an extensional stress regime and (2) tectonic inversion induced by the Mid-Atlantic Ridge push and the Andean Cordillera rise in the Neogene-Quaternary under a predominantly strike-slip stress regime. During the rift phase, the brittle reactivation of the shear zones controlled the locations and architectures of the rifts. These structures acted as zones of weakness and were reactivated as normal faults. The brittle reactivation of shear zones was still active during the postrift phase and was responsible for the development of compressional structures. The reverse faulting and related folding pattern indicate tectonic inversion in the Late Cretaceous-Cenozoic. The structures formed during the postrift phase under a strike-slip regime are consistent with the present-day stress field, indicating that tectonic inversion is an active phase of the Brazilian margin.", "We investigate the role of reactivation of Precambrian basement fabric in the tectono-sedimentary and geomorphological evolution of the Paraíba Basin, continental margin of northeastern Brazil, during the Cretaceous, Neogene, and Quaternary. This basin represents part of the last bridge between South America and Africa before the last breakup stage of the South Atlantic rifting in the early Cretaceous. The Paraíba Basin infill is composed of siliciclastic and carbonate Cretaceous units, as well as aeolian, fluvial and marine Quaternary units. We used shuttle radar imagery, aeromagnetic, wellbore and field data. The reduced-to-the-pole magnetic map (RTP) indicates the continuity of the steeply dipping Precambrian basement shear zones beneath the Paraíba Basin. The combined analysis of surface and subsurface data shows that NE–SW and E–W-striking shear zones were subjected to brittle reactivation in the Aptian–Middle Albian during the basin opening and again in the Neogene–Quaternary, forming a system of horsts and grabens along the basin; some of these structures such as the E–W-oriented Pernambuco shear zone present modern-day seismicity. N–S- and mainly NW–SE-striking transfer faults cut across Aptian–Middle Albian to Neogene–Quaternary strata. These four main fault directions control main river channels and alluvial valleys up to 2 km wide. Topographic breaks up to 50 m were created by late reactivation of rift faults, which mark the boundary between horsts and grabens along the basin. In addition, structural data evidence syn-tectonic faulting with vertical offsets up to 80 m in the Cretaceous and up to 70 m in the Neogene–Quaternary. We conclude that shear zones across the study area are long-lived structures that have behaved as weakness zones. Their neotectonic brittle reactivation has controlled sediment deposition and landform development, which continued through the Neogene–Quaternary.", "The rift phase of the Campos Basin developed during the Early Cretaceous on a heterogeneous crust comprising structures inherited from the Brasiliano-Pan African tectonic events, mostly generated during the Neoproterozoic-Cambrian amalgamation of western Gondwana blocks. The main rifting episode took place from the Hauterivian to the Barremian, then was succeeded by the transition and post-rift (SAG) phases during the Aptian. Rift faults developed as a result of a progressive rotation of extension from E-W to NW-SE. The role of pre-existing intra-basement structures on the style and evolution of the rift faults was investigated using 3D high-resolution seismic data, borehole logs and sidewall samples. Three seismic facies (SF1, SF2 and SF3) and three types of intra-basement structures (Surfaces, Geobodies and Internal Reflections) were identified and mapped. They represent, respectively, contrasting levels of seismic anisotropy, interpreted as metamorphic foliation, and ductile shear zones that bound rock units with particular seismic facies signatures. Sidewall cores show that banded biotite-gneiss is the predominant rock type in the eastern half of the study area, while more homogeneous granitoid is the dominant lithology on the west. Such a binary division of lithotypes is consistent with the distribution of mapped intra-basement seismic facies and features. The contrasting basement heterogeneity across the study area is the major control in the strain distribution during rifting. Where the basement is highly heterogeneous, the pre-existing fabric was selectively reactivated whenever its orientation was favourable, resulting in faults forming progressively as the extension direction rotates, whilst shallower low to very low angle basement fabric were cross-cut by rift faults. Where the basement is homogeneous, only early formed faults remain active throughout the rifting.", "The effect of previous structures inheritance is known to be important in the development of tectonic rifts. A series of overlapping structures generally can be represented by lineaments marking the successive tectonic events. We studied the NNE structural lineaments corridor in the central region of the Ribeira Belt. We used a digital elevation model (DEM) and new and previous fieldwork data to investigate the structural control of such lineaments and their relevance for the Brazilian continental margin. Our results suggest that the NNE direction is a crustal weakness zone characterising corridors of intense ductile and brittle deformation which was recurrently reactivated. Aligned NNE Neoproterozoic-Ordovician ductile and brittle structures as foliations, shear zones, lithological boundaries, and fractures filled by pegmatitic veins coincide with the lineaments. During the Cretaceous rift, a transtensional sinistral regime generated NNE T-fractures filled by mafic dykes. In the Cenozoic, the NNE direction is represented by transfer and domino faults developed within a mega accommodation zone in an intracontinental rift system. Our results suggest that the NNE direction was active in this region throughout the Phanerozoic and has high relevance for the structural development of the continental margin of southeastern Brazil.", "The continental shelf adjacent to the municipality of Salvador (CSS), state of Bahia, is the narrowest sector of the entire Brazilian continental shelf. During most of the Quaternary, this sector of the shelf was exposed to subaereous conditions, since sea level was approximately 45-60 meters below what is currently observed. This long subaereous exposure and resulting erosion were certainly controlled by the heterogeneity of the structural and stratigraphic framework of the Camamu and Jacuípe basins, highlighting relic physiographic features from both basins. The complex seascape that resulted from this prolonged erosion played an important role in controlling the characteristics of shelf sedimentation in episodes when the CSS was flooded during interglacial periods. The objective of the present study was to understand the geological evolution and the structural control of the Camamu /Jacuípe basins over sedimentation patterns of the Continental Shelf of Salvador, during the Quaternary, using seismic-stratigraphic interpretation of high-resolution shallow seismic lines obtained from a boomer plate sound source. Two major stratigraphic units were identified in the study area: the Cretaceous Sedimentary Basin and the overlapping Unconsolidated Quaternary Sediments. Isopach maps of Quaternary deposits and depth maps of the top of the Cretaceous sedimentary rocks showed that the structural framework of the Sedimentary Basin structurally controls shelf sedimentation. Compressional structures that affect the Cretaceous sedimentary rocks in areas near previously mapped transference faults seem to have originated topographic highs on the shelf where coarse bioclastic sedimentation predominates. These highs, in turn, delimitate low areas where fine-grained sediments accumulate. Shelf topographic highs are associated with antiforms in the Camamu/ Jacuípe basins, with their most deformed strata following a WNW-SSE trend. This information is important to aid marine environmental management strategies. Moreover, the present study will allow the evaluation of the controlling factors that determinate narrow shelf sedimentation and stratigraphy, with small accommodation area, as in the case of the CSS.", "Rifting and related normal stress regime in the equatorial continental margin of Brazil ceased during the Late Cretaceous, when the stress regimes in eastern South America and West Africa changed to induce strike-slip or reverse motion. In this study, we explore the postrift tectonic, geomorphic, magmatic, and sedimentary responses to stress changes using the Potiguar Basin, the easternmost basin in the equatorial margin of Brazil, as a case study. We use field and topographic data, 2D seismic reflection lines, vertical electric soundings, and geochronological and borehole data to constrain the stress evolution of the Potiguar Basin from the Late Cretaceous to the Quaternary, discussing the role of basin inversion on sedimentation and landforms. Our results indicate the presence of two strike-slip stress regimes after rifting. The first stress field (SF1) occurred from Late Cretaceous to the middle Miocene and consisted of a N-S-oriented maximum subhorizontal compression and an E-W-oriented extension. The second stress field (SF2) took place from the middle Miocene to the present day and included subhorizontal E-W to NW-SE compression combined with N-S and NE-SW subhorizontal extension. Emplacement of volcanic rocks occurred along transtensional faults, with a principal peak during SF1 at 20–30 Ma and a subordinate peak during SF2 at 5–10 Ma. In response to shortening during SF2, a 70-km-long and 50-km-wide dome formed, where marine Miocene strata were uplifted to ~250 m asl. This uplift induced the displacement of alluvial channels away from the dome. Anticlines formed by transpression along the main NE-SW-striking faults during both SF1 and ST2 acted as traps in the petroleum system. Similar shifts and stress field inversions documented in other areas of the Brazilian continental margin are consistent with the Neogene rise of the Andes and may have implications for reconstructing the tectonic history of the Equatorial Atlantic margin of South America.", "The Piúma lineament, located in the Southern Espírito Santo State, Brazil, is one of the most prominent linear morphostructural features of the northern Mantiqueira Province. The lineament stands out in satellite images and topographic maps, extending for about 70 km in a N50°W direction, between the towns of Iconha and Conceição do Castelo (Espírito Santo). In order to investigate the nature and role played by the Piúma lineament in the tectonic evolution of the Mantiqueira Province and adjacent Campos Basin, we carried out a detailed structural analysis based on fieldwork, as well as geophysical data processing and interpretation. The results we obtained indicate that the Piúma lineament is a brittle shear zone characterized by N50W-trending and SW-dipping shear fractures, faults and joints. These structures record two distinct and incompatible motions, thereby recording the operation of two tectonic regimes: NNE-SSW extension and E-W transtension. Comparing our results with the literature on the Southeastern Brazilian Continental Margin, we conclude that the Piúma lineament more likely developed after the Ediacaran Brasiliano orogenic event in response to an NNE-SSW extension, experiencing later a reactivation as normal dextral to dextral transtensional zone, probably in connection with the South Atlantic rifting in the Lower Cretaceous.", "The Santa Catarina Plateau is a prominent undersea feature of the Brazilian Southern Margin with approximately 340,000 km2 that interrupts the lower continental slope between depths of 2900 and 3200 m. The plateau’s morphology and basement were unknown until new geophysical data were acquired for the Brazilian Continental Shelf Survey Program (LEPLAC). The multibeam bathymetry, sub-bottom profile, and mini-airgun data allowed the identification of important morphologic features, such as the Santa Catarina Drift and Pelotas Drift, and the study of their sedimentary processes, especially related to slope instabilities and mass movement. The seismic and gravimetric datase.ts allowed the study of the Torres High, an important structural feature that supports most of the Santa Catarina Plateau. With this new dataset, it was possible to develop different gravimetric models, controlled by the ultra-deep seismic information, to analyze the two competing hypotheses for the nature of Torres High: (1) thickened oceanic crust or (2) continental crust. The crustal and the Moho character below the Torres High, observed in strike- and dip-oriented ultra-deep seismic lines, and the results of the gravimetric model, support the interpretation of its continental nature. Additionally, the analysis of the basement depth and the interpretation of the Bouguer gravity map clearly show the Torres High as a continuous structural feature attached to the South American continent, in a northwest-southeast direction, constituting a continental promontory of the Brazilian land mass and part of the basement of the Santa Catarina Plateau.", "The vegetation history and climate in southeastern Brazil, as well as the oceanic dynamics of the tropical Atlantic Ocean offshore, were reconstructed for the last 7.4 cal ka BP. This reconstruction was based on pollen, fern spores and dinoflagellate cysts identified in a marine core (CF10–04B). It was possible to verify the presence of an ombrophilous forest from 7.4 cal ka BP. Near the base of the PI zone low concentrations of pollen and fern spores are recorded, along with low frequencies of forest taxa and fern spores and an increase in pollen types of open vegetation, suggesting less humid climatic conditions than currently observed in the coastal regions of Southeastern Brazil. The assemblages of dinoflagellate cysts suggest a neritic zone with warm upper column temperature, high salinity and oligotrophic environment (evidenced by the presence of O. centrocarpum, Spiniferites spp. and L. machaerophorum). An increase in Tropical Waters (TW) and the approximation of the Brazilian Current (BC) in the middle shelf of southeastern Brazil in the mid-Holocene probably influenced the low accumulation of cysts, pollen grains, fern spores, and their associations. It is still possible to verify that at approximately 4.6 cal ka BP, an increase in the rainfall in the southeastern Brazilian region was probably the fundamental factor for the expansion of vegetation, mainly based on the considerable increases in hygrophytic and aquatic plants. The marked increase in the accumulation of dinoflagellate cysts, with the dominance of autotroph taxa (mainly O. centrocarpum, followed by Spiniferites spp), evidences the warmer waters of the BC and more intense surface upwelling of the South Atlantic Central Water (SACW).", "The coastal zone, where most of the Brazilian population lives, plays a central role for discussing vulnerability and adaptation strategies to climate change. Besides saltmarshes, mangroves and coral reefs, this region also presents seagrass beds, macroalgae and rhodolith beds, forming underwater forests, which are key habitats for services such as biodiversity conservation, O2 production, and absorption of part of the CO2 from the atmosphere. Science endorses that ocean warming and acidification, sea level rise, biological invasions and their interactions with pollution, overfishing, and other stressors undermine the structure and functioning of these ecosystems, thus increasing the region's socio-environmental vulnerability. Ecosystem conservation, management and potential bioremediation/restoration using science-based solutions must be prioritized in order to reduce the vulnerability of coastal communities and the ocean." ]

[ "Shipyards impact on estuarine environments because of the use of antifouling paints and petroleum products, which release trace metals that may remain in their bioavailable or labile form. Regardless of its importance, the relation between continuous input of trace metals (hotspot area) and their availability in the water column has been scarcely studied. This study evaluated seasonal variations in the concentrations of labile fractions of metals in shipyards located in estuarine areas on the Brazilian subtropical coast. These fractions were determined by the Diffuse Gradients in Thin Films (DGT) technique. Maximum labile fraction concentrations of Cr (0.3 ?g L-1), Ni (2.2 ?g L-1) and V (2.0 ?g L-1) are directly related to (i) their specific source: antifouling paints (for Cr), metal and steel alloys (for Cr and Ni) and petroleum products (for V), besides (ii) periods of intensive traffic and vessel repair. Additionally, variations in labile fractions of Ni and V in the Patos Lagoon estuary were influenced by salinity, which is known to affect metal desorption from surface sediments in resuspension events. Even though Cr is affected by the same processes, it is available as Cr(III) and does not represent any ecological risk in the study areas. Although the areas under study are affected by variations in physical and chemical conditions, shipyards were effectively hotspots of trace metals in their labile fraction in various estuarine systems in southeastern and southern Brazil. Thus, they represent areas where Ecological Risk Assessment, mainly of V, should be carried out." ]

[ "A385" ]

[ "The knowledge of metal behavior in the aquatic environment is important for understanding its effects in estuarine zones and mangrove areas. These important and precious ecosystems are affected by many different factors that may vary temporally and spatially. The present study investigated the spatial and temporal variation of physicochemical parameters (pH, dissolved oxygen, temperature, salinity, etc.) and metal concentrations (Zn, Fe, Ni, Cu) at three different locations along the Todos os Santos Bay, North East Brazil, by analyzing surface water, sediment and mangrove oysters (Cassostrea rhizophorae (Guildin, 1828)). Metal concentrations in surface waters and sediments differed between the three sampling times (March and August 2014; January 2015) and locations and were affected by fluctuating physicochemical parameters, which in this way also affected the metal bioconcentration in the oysters. The pH of the surface waters, for example, increased from the 1st to the 3rd sampling time while the concentrations of Zn and Fe decreased during the same period. The sediment concentrations of Zn and Fe were strongly correlated with organic matter content. These results suggests that seasonality as well as the different water and sediment properties along the bay directly affect metal concentration and bioavailability in the environment.", "High concentrations of total arsenic (As), even above the Brazilian legislative threshold for marine sediments of 70 mg kg-1, were found in beach sands and near-shore surface sediments. Two mechanisms (anthropogenic activities and sedimentary processes in the coastal waters) are responsible for this contamination. The anthropogenic impact includes releases from metallurgical plants, phosphate fertilizer plants and gold and iron mining. In the coastal area sedimentary processes redistributed the As from the sediment into the porous structure of calcareous marine algae. These enriched calcareous algae are transported over time to the beach by wave action. As in the Brazilian coastal environment, increased As levels were also observed in other coastal environments of South America such as Rio Loa (Chile), Barbacoas Bay (Colombia) and the Southern Pampa region (Argentina). Finally, arsenic levels in fish from Brazilian coastal waters and North Sea, which is also an As-contaminated area, were compared. In both areas, short term health effects from fish consumption are not expected, but a lifetime cancer risk cannot be excluded.", "The Southern Brazilian Continental Shelf (SBCS) is one of the more productive areas for fisheries in Brazilian waters. The water masses and the dynamical processes of the region present a very seasonal behavior that imprint strong effects in the ecosystem and the weather of the area and its vicinity. This paper makes use of the Regional Ocean Modeling System (ROMS) for studying the water mass distribution and circulation variability in the SBCS during the year of 2012. Model outputs were compared to in situ, historical observations and to satellite data. The model was able to reproduce the main thermohaline characteristics of the waters dominating the SBCS and the adjacent region. The mixing between the Subantarctic Shelf Water and the Subtropical Shelf Water, known as the Subtropical Shelf Front (STSF), presented a clear seasonal change in volume. As a consequence of the mixing and of the seasonal oscillation of the STSF position, the stability of the water column inside the SBCS also changes seasonally. Current velocities and associated transports estimated for the Brazil Current (BC) and for the Brazilian Coastal Current (BCC) agree with previous measurements and estimates, stressing the fact that the opposite flow of the BCC occurring during winter in the study region is about 2 orders of magnitude smaller than that of the BC. Seasonal maps of simulated Mean Kinetic Energy and Eddy Kinetic Energy demonstrate the known behavior of the BC and stressed the importance of the mean coastal flow off Argentina throughout the year.", "This study presents results of a sediment core located in Coroa de Boi Bay, a not dredged cove within Patos Estuary, Southern Brazil. The distribution of metals (Hg, Cu, Pb) and U in the sediment profile records several contamination events since pre-colonial times to present days. A joint assessment of the distribution of these parameters and the consultation to historical documents allowed us to establish causal links between concentrations anomalies in the sediments and ancient anthropogenic contamination in the area. During the industrial period, sedimentation rates in the bay ranged from 3.4 to 5.5 mm year-1. Applying a sedimentation rate previously calculated for undisturbed sediments in the Patos Estuary, we trace the beginning of Hg contamination as having started in the colonial period in Southern Brazil, soon after a Hispanic-Lusitanian conflict situation in South America. The most probable source of Hg contamination during this period was carroting technology used in fur processing.", "Based on a vast set of in situ data, a first comprehensive overview of the oceanographic characteristics of Baía de Todos os Santos (BTS) is provided. BTS is the second largest coastal bay in Brazil (maximum area of 1223 km2 and average depth of 9,8 m), and is located in the northeast Brazil, In the vicinity of Salvador city. The circulation inside the bay is mostly tidally driven and does not vary significantly throughout the year. On the other hand, the wet (winter) and dry (summer) seasons does alter significantly the distribution of water properties inside the BTS. During summer, the waters Inside the bay have oceanic characteristics, with Tropical Water (TW) penetrating along the whole region, except for the mouth of Rio Paraguaçu, The water temperature inside the bay is higher than in the coastal zone, and variations can be up to 3°C, reaching a maximum of nearly 30°C, During winter, with the increase of freshwater Inflow, salinity variations of about 4 are observed between the innermost stations Inside BTS and the adjacent coastal region, Salinity values inside the bay can be as low as 32.3, inhibiting the penetration of TW into the BTS, which Is totally occupied by a locally formed Coastal Water (CW). An evaluation of the flushing time is also provided and shows that during summer, a 60-fold increase can be observed compared to winter (38 days). While the circulation does not vary seasonally Inside the bay, the associated inner shelf is characterized by two different scenarios. During summer, the upwelling favorable easterlies drive a southwestward flow, while during winter the more frequent occurrence of cold fronts (southerly winds) tend to reverse the circulation.", "Brazilian oceanic islands are areas of great environmental, scientific, economic and strategic interest for the country. A better understanding of the thermohaline and hydrodynamic properties is fundamental to complement studies of chemical and biological processes active on the Fernando de Noronha archipelago, located between 03° 52'S and 32° 25'W. The aim of this work was to verify the coastal thermohaline behavior of the most inhabited part of the island, on a seasonal and spatial scale and how it is associated with the nutrient distribution data. Four campaigns were conducted in 2013 and 2014, two during the wet season and two during the dry season. For each period, data were collect at five stations. The results show that during the rainy season temperature increases and salinity decreases in the surface layer. Spatially no large differences are observed. Regarding to nutrient concentration, seasonal concentrations are quite homogeneous in the waters of the archipelago region. The coastal region was characterized by tropical mass water.", "The present study evaluated the different morphodynamic scenarios that arise under varying tidal and wave conditions on a sandy beach (Ajuruteua) and an exposed tidal flat (Vila dos Pescadores) on the Amazon coast of northern Brazil. For this, four field campaigns were conducted, covering a full annual cycle, for the collection of nearshore data (tides, waves, rainfall, topographic changes, and sediment characteristics). These data were complemented with meteorological (rainfall), fluvial discharge and offshore (wave and wind) data obtained from the stations of official agencies. Ajuruteua beach has very fine sand (2.1-2.7 ?) with a typical profile characterized by a narrow high-tide zone (<10 m) and intertidal zone with a low-gradient (1°–2°) and varying width, ranging from 250 m (neap tide) to 350 m (spring tide). At that beach, tidal flat conditions occur primarily during the equinoctial period, when tidal asymmetry is strongest (ebb tide longer than 7 h). At Vila dos Pescadores, the sand is also fine (more than 70% of grain 2.0-3.0 ?) and the migration of the main tidal channel is delimited by a low, broad terrace. In this area, the transition between tide-dominated, tide-modified, and wave-dominated conditions occurs during the high tide, primarily during the dry season, when the highest Hs values (up to 1.3 m) are recorded on the tidal flat. In the study region, the unregulated construction of buildings has resulted in increasing impacts from erosive processes, which has partially or totally destroyed the existing beachfront infrastructure. The results of the present study provide important insights for the development of more effective management strategies for the local environments.", "Central Brazil hydroclimate is in the core region of the South American monsoon system. Thus, understanding precipitation variability in this area is crucial not only for the prediction of extreme events such as droughts and floods, but also for water resources management. Ocean teleconnections influence central Brazil precipitation from intraseasonal to interdecadal frequencies, in both linear and nonlinear ways, mainly during the austral summer. Pacific Ocean climate modes can influence South American precipitation, but how its variability changes over time is still a theme of scientific debate. Here we examined the influence of Pacific variability on summer precipitation in central Brazil during the last eight decades. We applied nonparametric spectral methods to four different observational datasets, and to AMIP-type precipitation outputs from the Laboratoire de Météorologie Dynamique zoom model (LMDZ) in Coupled Model Intercomparison Project phases 5 and 6 (CMIP5 and CMIP6) contributions of the Institut Pierre Simon Laplace (IPSL) coupled model. Our results showed an increase in amplitude and frequency of summer precipitation variability after the 1970s climate transition. Spectral analysis associated these changes to a transition in Pacific Ocean influence to central Brazil precipitation, from PDO- to El Niño–Southern Oscillation (ENSO)-related variability after the 1970s climate transition. Composite analysis suggests these changes are related to teleconnection patterns between the Pacific Ocean and South America precipitation.", "The mixture of different water masses can strongly influence the marine reservoir effect (MRE) in localities under the effect of coastal marine upwelling. The Cabo Frio region, on the southeastern Brazilian coast, is well known for its seasonal marine upwelling and for its rich landscape of Holocene shellmounds. In this kind of archaeological settlement, common on the southern and southeastern Brazilian coasts, marine mollusk shells are frequently used for radiocarbon dating and can represent a valuable tool in the study of MRE. On the other hand, terrestrial mollusks have proven to be an important alternative to represent the atmospheric carbon isotopic concentration. In this work we analysed the most frequent terrestrial and marine mollusk shells from the Usiminas shellmound, on Cabo Frio Island. The radiocarbon signal of marine shells from Pinctada imbricata (Röding, 1798), Ostreidae (Rafinesque, 1815), Cymathium parthenopeum (Von Salis, 1793), Leucozonia nassa (Gmelin, 1791), Lithopoma olfersii (Philippi, 1846), and that of terrestrial shells from Thaumastus achilles (Pfeiffer, 1852) and Megalobulimus terrestris (Spix, 1827), collected from the archaeological layers in the sequence, were measured and a value of 67 ± 33 14C yr was obtained for the local offset from the average global marine reservoir age. The effect of upwelling in this region and in its surrounding area is discussed.", "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin." ]

[ "The winds in the atmosphere are the main drivers of these ocean surface currents. The interface between the ocean and the atmosphere and the effect of the winds also allows for the ocean to absorb oxygen and, more importantly, carbon dioxide from the air. Annually, the ocean absorbs 2,300 gigatonnes of carbon dioxide (IPCC, 2005; see Chapter 5). In addition to this vast surface ocean current system, there is the ocean thermohaline circulation (ocean conveyor) system (Figure 3). Instead of being driven by winds and the temperature difference between the equator and the poles (as are the surface ocean currents), this current system is driven by differences in water density. The most dense ocean water is cold and salty which sinks beneath warm and fresh seawater that stays near the surface. Cold-salty water is produced in sea ice “factories” of the polar seas: when seawater freezes, the salt is rejected (the ice is mostly fresh water), which makes the remaining liquid seawater saltier. This cold saltier water sinks into the deepest ocean basins, bringing oxygen into the deep ocean and thus enabling aerobic life to exist." ]

[ "B2118" ]

[ "The polar ice sheets of Greenland and Antarctica are the largest reservoirs of freshwater on the planet, holding 7 m and 58 m of the sea-level equivalent, respectively (Vaughan et al., 2013). The net growth or shrinkage of such an ice sheet is a balance between the net accumulation of snow at the surface, the loss from meltwater runoff, and the calving of icebergs and submarine melting at tidewater margins, collectively known as marine ice loss. There is some debate about the relative importance of these in the case of Greenland. Van den Broeke et al. (2009), show the volume transport to the ocean is almost evenly split between runoff of surface meltwater and marine ice loss. In a more recent work, Box and Colgan (2013) estimate marine ice loss at about twice the volume of meltwater (see Figure 5 in that article), with both marine ice loss and particularly runoff increasing rapidly since the late 1990s. According to the Arctic Monitoring and Assessment Programme (AMAP, 2011), the annual mass of freshwater being added at the surface of the Greenland Ice Sheet (the surface mass balance) has decreased since 1990. Model reconstructions suggest a 40% decrease from 350 Gt/y (1970 - 2000) to 200 Gt/y in 2007. Accelerating ice discharge from outlet glaciers since 1995 - 2002 is widespread and has gradually moved further northward along the west coast of Greenland with global warming. According to AMAP (2011), the ice discharge has increased from the pre-1990 value of 300 Gt/y to 400 Gt/y in 2005. Antarctica’s climate is much colder, hence surface meltwater contributions are negligible and mass loss is dominated by submarine melting and ice flow across the grounding line where this ice meets the ocean floor (Rignot and Thomas, 2002). Freshwater fluxes from ice sheets differ from continental river runoff in two important respects. First, large fractions of both Antarctic ice sheets are grounded well below sea level in deep fjords or continental shelf embayments; therefore freshwater is injected not at the surface of the ocean but at several hundred meters water depth. This deep injection of freshwater enhances ocean stratification which, in turn, plays a role in ecosystem structure. Second, unlike rivers, which act as a point source for freshwater entering the ocean, icebergs calved at the grounding line constitute a distributed source of freshwater as they drift and melt in adjacent ocean basins (Bigg et al., 1997; Enderlin and Hamilton, 2014). Sea ice is one of the smallest reservoirs of freshwater by volume, but it exhibits enormous seasonal variability in spatial extent as it waxes and wanes over the polar oceans. By acting as a rigid cap, sea ice modulates the fluxes of heat, moisture and momentum between the atmosphere and the ocean. Summertime melting of Arctic sea ice is an important source of freshwater flux into the North Atlantic, and episodes of enhanced sea ice export to warmer latitudes farther south give rise to rapid freshening episodes, such as the Great Salinity Anomaly of the late 1960s (Gelderloos et al., 2012). The spatial distributions of these freshwater fluxes drive important patterns in regional and global ocean circulation, which are discussed in Chapter 5.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "The new map shows the way in which the ocean consists of four main basins (the Arctic Ocean, the Atlantic Ocean, the Indian Ocean and the Pacific Ocean) between the tectonic plates that form the continents. The tectonic plates have differing forms at their edges, giving broad or narrow continental shelves and varying profiles of the continental rises and continental slopes leading from the abyssal plain to the continental shelf. Geomorphic activity in the abyssal plains between the continents gives rise to abyssal ridges, volcanic islands, seamounts, guyots (plateau-like seamounts), rift valley segments and trenches. Erosion and sedimentation (either submarine or riverine when the sea level was lower during the ice ages) has created submarine canyons, glacial troughs, sills, fans and escarpments. Around the ocean basins there are marginal seas, partially separated by islands, archipelagos or peninsulas, or bounded by submarine ridges. These marginal seas have sometimes been formed in many ways: for example, some result from the interaction between tectonic plates (for example the Mediterranean), others from the sinking of former dry land as a result of isostatic changes from the removal of the weight of the ice cover in the ice ages (for example, the North Sea). The water of the ocean circulates within these geological structures. This water is not uniform: there are very important physical and chemical variations within the sea water. Salinity varies according to the relativity between inputs of freshwater and evaporation. Sea areas such as the Baltic Sea and the Black Sea, with large amounts of freshwater coming from rivers and relatively low evaporation have low salinity – 8 parts per thousand and 16 parts per thousand, respectively, as compared with the global average of 35 parts per thousand (HELCOM 2010, Black Sea Commission 2008). The Red Sea, in contrast, with low riverine input and high insolation, and therefore high evaporation, has a mean surface salinity as high as 42.5 parts per thousand (Heilman et al 2009). Seawater can also be stratified into separate layers, with different salinities and different temperatures. Such stratification can lead to variations in both the oxygen content and nutrient content, with critical consequences in both cases for the biota dependent on them. A further variation is in the penetration of light. Sunlight is essential for photosynthesis of inorganic carbon (mainly CO2) into the organic carbon of plants and mixotrophic species1 . Even clear water reduces the level of light that can penetrate by about 90 per cent for every 75 metres of depth. Below 200 metres depth, there is not enough light for photosynthesis (Widder 2014). The upper 200 metres of the ocean are therefore where most photosynthesis takes place (the euphotic zone). Variations in light level in the water column and on the sea bed are caused by seasonal fluctuation in sunlight, cloud cover, tidal variations in water depth and (most significantly, where it occurs) turbidity in the water, caused, for example, by resuspension of sediment by tides or storms or by coastal erosion. Where turbidity occurs, it can reduce the penetration of light by up to 95 per cent, and thus reduce the level of photosynthesis which can take place (Anthony 2004).", "The Earth's ocean and atmosphere are parts of a single, interactive system that controls the global climate. The ocean plays a major role in this control, particularly in the dispersal of heat from the equator towards the poles through ocean currents. The heat transfer through the ocean is possible because of the larger heat-capacity of water compared with that of air: there is more heat stored in the upper 3 metres of the global ocean than in the entire atmosphere of the Earth. Put another way, the oceans hold more than 1,000 times more heat than the atmosphere. Heat transported by the major ocean currents dramatically affects regional climate: for example, Europe would be much colder than it is without the warmth brought by the Gulf Stream current. The great ocean boundary currents transport heat from the equator to the polar seas (and cold from the polar seas towards the equator), along the margins of the continents. Examples include: the Kuroshio Current in the northwest Pacific, the Humboldt (Peru) Current in the southeast Pacific, the Benguela Current in the southeast Atlantic and the Agulhas Current in the western Indian Ocean. The mightiest ocean current of all is the Circumpolar Current which flows from west to east encircling the continent of Antarctica and transporting more than 100 Sverdrups (100 million cubic meters per second) of ocean water (Rintoul and Sokolov, 2001). As well as the boundary currents, there are five major gyres of rotating currents: two in the Atlantic and two in the Pacific (in each case one north and one south of the equator) and one in the Indian Ocean.", "Wind-driven mixing affects only the surface of the ocean, mainly the upper 200 metres or so, and rarely deeper than about 1,000 metres. Without the ocean’s thermohaline circulation system, the bottom waters of the ocean would soon be depleted of oxygen, and aerobic life there would cease to exist. Superimposed on all these processes, there is the twice-daily ebb and flow of the tide. This is, of course, most significant in coastal seas. The tidal range varies according to local geography: the largest mean tidal ranges (around 11.7 metres) are found in the Bay of Fundy, on the Atlantic coast of Canada, but ranges only slightly less are also found in the Bristol Channel in the United Kingdom, on the northern coast of France, and on the coasts of Alaska, Argentina and Chile (NOAA 2014). Global warming is likely to affect many aspects of ocean processes. Changes in seasurface temperature, sea level and other primary impacts will lead, among other things, to increases in the frequency of major tropical storms (cyclones, hurricanes and typhoons) bigger ocean swell waves and reduced polar ice formation. Each of these consequences has its own consequences, and so on (Harley et al., 2006; Occhipinti-Ambrogi, 2007). For example, reduced sea ice production in the polar seas will mean less bottom water is produced (Broecker, 1997) and hence less oxygen delivered to the deep ocean (Shaffer et al., 2009).", "Global surface ocean pH has declined on average by approximately 0.1 since the Industrial Revolution, an increase in acidity of about 30 per cent. Ocean pH is projected to decline by approximately an additional 0.3 over the next century unless global carbon emissions are significantly curtailed. The changes can be observed in extended ocean time series, and the rate of change is likely to be unparalleled in at least the past 66 million years. The time of emergence of the signal varies from 8 to 15 years for open ocean sites and 16 to 41 years for coastal sites, making it necessary to commit to long-term observational records, especially in the coastal zone, where most commercially and culturally important marine resources reside.Oceanic oxygen levels have declined in recent decades, with strong regional variations. While the overall oxygen content has decreased by about 2 per cent in five decades, oxygen in coastal areas or near oxygen minimum zones shows larger variations. Coastal changes are mostly fuelled by riverine run-off, and the open ocean changes are likely related to a combination of changes in ocean circulation and biogeochemical cycles. Temperature-driven solubility decrease is responsible for most near-surface oxygen loss, while other processes have to be accountable for deep-ocean oxygen loss. A further decrease in oxygen in and near oxygen minimum zones can lead to climate feedback through consequent greenhouse gas emissions.Sea ice covers 15 per cent of the global ocean and affects global heat balance and global thermohaline circulation. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. Arctic sea ice extent is declining by -2.7 ± 0.4 per cent c-1 during the winter, and -2.8 ± 2.3 per cent c-1 during the summer. In contrast, trends in total Antarctic sea ice extent are insignificant, 0.6 ± 0.6 per cent c-1 during the summer and 1.1 ± 3.7 per cent c-1 during the winter. Regionally, the spatial distribution of the trends is dramatic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. The spatial distribution of the changes in sea ice is attributed to changes in wind and ocean currents related to the Arctic Oscillation in the northern hemisphere and the Southern Annular Mode and El Niño in the southern hemisphere.", "The global ocean covers 71 per cent of the Earth’s surface, and contains 97 per cent of all the surface water on Earth (Costello et al., 2010). Freshwater fluxes into the ocean include: direct runoff from continental rivers and lakes; seepage from groundwater; runoff, submarine melting and iceberg calving from the polar ice sheets; melting of sea ice; and direct precipitation that is mostly rainfall but also includes snowfall. Evaporation removes freshwater from the ocean. Of these processes, evaporation, precipitation and runoff are the most significant at the present time. Using current best estimates, 85 per cent of surface evaporation and 77 per cent of surface rainfall occur over the oceans (Trenberth et al., 2007; Schanze et al., 2010). Consequently, the ocean dominates the global hydrological cycle. Water leaving the ocean by evaporation condenses in the atmosphere and falls as precipitation, completing the cycle. Hydrological processes can also vary in time, and these temporal variations can manifest themselves as changes in global sea level if the net freshwater content of the ocean is altered.", "The Southern Ocean (defined as all ocean area south of 60°S) deserves special mention due to its role in the storage of heat (and carbon) for the entire planet. The Antarctic Circumpolar Current (ACC) connects the three major southern ocean basins (South Atlantic, South Pacific and Indian) and is the largest current by volume in the world. The ACC flows eastward, circling the globe in a clockwise direction as viewed from the South Pole. In addition to providing a lateral connection between the major ocean basins (Atlantic, Indian, Pacific), the Southern Ocean also connects the shallow and deep parts of the ocean through a mechanism known as the meridional overturning circulation (MOC) (Gordon, 1986; Schmitz, 1996, see Figures I-90 and I-91). Because of its capacity to bring deep water closer to the surface, and surface water to depths, the Southern Ocean forms an important pathway in the global transport of heat. Although there is no observational evidence at present, (WG II AR5, 30.3.1, Hoegh-Guldberg, 2014) model studies indicate with a high degree of confidence that the Southern Ocean will become more stratified, weakening the surface-to-bottom connection that is the hallmark of present-day Southern Ocean circulation (WG I AR5 12.7.4.3, Collins et al., 2013). A similar change is anticipated in the Arctic Ocean and subarctic seas (WG I AR5 12.7.4.3, Collins et al., 2013), another region with this type of vertical connection between ocean levels (Wüst, 1928). These changes will result in fresher, warmer surface ocean waters in the polar and subpolar regions (WGII AR5 30.3.1, Hoegh-Guldberg, 2014; WG I AR5 12.7.4.3, Collins et al., 2013), significantly altering their chemistry and ecosystems.", "Pressures from changes in ocean chemistry Ocean uptake of carbon dioxide emissions is rapidly changing seawater chemistry in a process known as ocean acidification (see chap. 5). As the partial pressure of carbon dioxide in seawater increases, it causes the carbonate saturation state to fall below levels suitable for globally important reef-forming taxa (Albright and others, 2018). Most coral reefs (shallow and deep) are vulnerable to rising CO2 concentrations (Lam and others, 2019). Ocean acidification is causing the depth at which seawater is corrosive to carbonate to shoal, threatening deepwater coral reefs worldwide through dissolution and intensified bioerosion (Gómez and others, 2018). Ocean acidification combines with warming, rising sea level and more severe storms to reduce reef resilience on a global scale and augment reef destruction. In the Arctic, there has been a rapid expansion in the area where surface seawater is corrosive to calcareous organisms (Brodie and others, 2014). Ocean acidification may affect all marine life, for example, through changes in gene expression, physiology, reproduction and behaviour (Riebesell and Gattuso, 2015; IPCC, 2019). Between 2005 and 2009, ocean acidification jeopardized a $270 million shellfish aquaculture industry that provided 3,200 jobs per year in Washington State, United States. Billions of oysters died in hatcheries because seawater had become corrosive to larval shells (Ekstrom and others, 2015). In addition to its negative impacts on calcifying phyto- and zooplankton, acidification can lower the nutritional value of seafood. Ocean acidification also affects ecosystem properties, functions and services. Some groups of organisms do well in acidified conditions, but many taxa do not (Agostini and others, 2018). Many algae are resilient to the levels of ocean acidification projected under the Intergovernmental Panel on Climate Change RCP 8.5 scenario, yet shifts in community composition greatly alter seaweed habitats (Brodie and others, 2014; Enochs and others, 2015). Increased carbon availability stimulates primary production and can increase the standing stock of kelps and seagrasses (Russell and others, 2013; Linares and others, 2015; Cornwall and others, 2017), although microalgae and turf algae dominate acidified waters in exposed conditions (Agostini and others, 2018; Connell and others, 2018). Research at natural marine CO2 seeps has shown that there is about a 30 per cent decrease in macrofaunal biodiversity as average pH declines from 8.1 to 7.8 (Agostini and others, 2018; Foo and others, 2018), which is attributable to direct effects, such as increased metabolic costs of coping with hypercapnia, or indirect effects, such as increased susceptibility to predation (Sunday and others, 2017). Some corals grow well in seawater with elevated CO2 concentrations, but the habitats they form lack diversity as reefs are degraded by ocean acidification owing to chemical dissolution and enhanced bioerosion, causing a shift to less diverse ecosystems. Chapter 7D also reviews the impacts of ocean acidification on coral reefs. The dual effects of increased CO2 and decreased carbonate alter trophic interactions. Reductions in the abundance and size of calcareous herbivores contribute to the overgrowth of weedy turf algae and a simplification of food webs, with losses in functional diversity (Vizzini and others, 2017; Teixidó and others, 2018)." ]

[ "Invented by Petrobras in 1996, the torpedo anchor has been successfully applied in Floating Production Storage and Offloading (FPSO) in the Gulf of Mexico (Medeiros, 2002). With a torpedo-like hydrodynamic shape, the torpedo anchor obtains the kinetic energy required for penetration by free-falling through the water. It then uses that energy to penetrate into the seabed, thereby completing its installation. This paper discusses the large deformation finite element method and the CEL method, which are used to calculate the torpedo anchor penetration in a cohesive-soil seabed. The characteristics of the soil and the anchor at different moments during the torpedo anchor penetration are analyzed based on simulation results." ]

[ "A315" ]

[ "Anchoring systems in deep-water Oil & Gas operations can be very challenging, considering the high loads usually applied and the soft soil to hold the anchor. The development of offshore anchoring systems with Torpedo Pile is a technological application that can save time and cost during the mooring installation. With a very efficient holding capacity, and using the free-fall energy for its own installation, this technology is widely used in Brazil, by Petrobras. It is estimated that more than 2,000 torpedo piles were successfully installed in Brazil's shore. This Kind of Anchor is field proven, applied to FPSOs, Rigs, Steel Risers, Flexible flowlines and Umbilical cables anchor process, with a large range of holding capacity loads. This paper presents the advantages to use this technology, considering the overall mooring installation process, and suggest different applications for torpedo piles. Considering the nowadays increasing requirement for renewable energy, and the large potential for offshore wind power generation, this work brings the proposal to use the torpedo pile technology in the mooring design for the floating wind turbines. With the anchoring efficiency, in addition to the reduced installation time, torpedo pile can improve competitiveness in such a challenged market.", "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market.", "This paper describes the site installation of a turret moored Floating Production, Storage and Offloading System - FPSO - in 780 meters of water in Campos Basin, offshore Brazil. The FPSO, a 270,000 dwt converted tanker, is the first of a series of two ordered by Petrobras for development of the Marlim Field. An internal bow mounted Turret system, anchored to the seafloor by 8 chain-wire rope-chain combined mooring legs, is used to permanently moor the FPSO in the location while allowing the vessel to freely weathervane. Thirty-five flexible risers, laid in a free-hanging catenary configuration, provide the flow path between the FPSO and the various subsea equipment on the seafloor. This paper describes the installation equipment and procedures employed.", "The project and the construction of the secondary Mooring Berth intended for petroleum by-products which forms part of the system of the Petrobras Almirante Tamandate Maritime Terminal (Tegua) in Guanabara Bay, and permits 18 simultaneous operations of two 35,000 dwt tankers. The total length of the mooring berth is 314. 50 m, and it has a depth of water of 13. 00 m below low water level. The central platform has eight '%'Chick-San'%' devices, with corresponding suspension arms to maneuvre the ship connection hoses.", "The paper will present different versions of barge concepts with surface trees from the smallest unit \"The Wellhead Barge - WHB®\" supporting only surface trees and completion rig, to the largest unit \"The Multifunction Barge - MFB®\", an FPSO with surface trees and drilling facilities. A spread moored barge is already used as a production unit on the NKOSSA field offshore Congo and a spread moored FPSO will be installed offshore Angola in 1350 m water depth on the GIRASSOL field in early 2001. Although none of these facilities has surface trees on board, their motion behavior is compatible with both drilling and surface trees. West African unique metocean conditions allow deepwater field operators to consider spread-moored barge-type floaters to support surface wellheads and perform drilling operations. In other deep offshore areas, such as Gulf of Mexico and Offshore Brazil, Tension Leg Platforms (TLP's) and deep draft vessels are presently the only floaters able to support surface trees. The paper will present results of computational work and their correlation with tank tests on the MFB®, and WHB® performed on 1/60 model including hull, mooring and risers under wave and current loadings. Emphasis will be placed on risers, drilling arrangement, and hydrodynamic behavior within the well bay. Economical advantage, which results from the use of the \"Surface Tree Barges\", will conclude the paper. Barges with surface trees take advantage of benign metocean conditions of Gulf of Guinea to offer a single vessel as drilling and production support for field development. Surface trees and drilling facility are integrated on a low cost, high carrying capacity floater able to support any kind of processing plant with or without crude storage.", "Tender-assisted drilling (TAD) has been revealed as an efficient and effective solution in deep water installations to support drilling operations of tendon leg platforms (TLP). Although this concept is new in offshore Brazil, this has been used for more than 30 years not only in the Southeast Asia but also in the Gulf of Mexico, West Africa, and the North Sea. Due to the complex scenario of two floaters moored in close proximity, an extensive and careful hydrodynamic analysis is required to guarantee a successful execution. This work presents a numerical study of coupled wave motions on the TLP–TAD multibody system with the aim of investigating first-order loads, mean drift loads, and wave frequency responses using frequency and time domain approaches. Hydrodynamic coefficients were calculated by the 3D diffraction–radiation panel method; the mooring systems and the mechanical connection between the floaters were modeled through stiffness matrixes. In frequency domain analysis, several relative positions between the floaters were considered. On the other hand, in time domain studies, the finite element method (FEM) was used to represent moored systems and mechanical connections between the floaters. FEM allows the inclusion of drag forces, added mass, and interactions between mooring lines and floaters into the nonlinear dynamic simulations.", "Brazilian offshore scenario requires innovative solutions in order to increase the efficiency of operations, while still keeping the safety and the economical constraints. The global market and naval industry cannot meet the demand of the growing exploration activities, related to the recent discovery of new oil fields. Furthermore, they are located at a large distance from the shore (approximately 300km) and the environmental conditions are severe. These facts impose more logistics problems for materials and persons transportations. The retrofitting of vessels is an alternative for increasing their operability and this option has been studied by Transpetro, subsidiary of Petrobras responsible for the Ducts, Terminals, Maritime Transport and Natural Gas segments. This paper presents two real cases of retrofitting related to the application of new technologies for positioning, including Dynamic Positioning (DP) Systems or manually operated thrusters. In the first case, a conventional tanker will be converted to a DP2 tanker, in order to operate close to drill ships and to transfer fluids during the drilling operation. The second case is related to an offshore delivering vessel used for bunkering operation. This vessel is moored at a monobuoy, and up to 2 receiving vessels may be connected to it. An aft-azimuth thruster will be installed in the vessel, increasing its capacity to change heading in harsh environmental conditions and to keep a safe distance from the monobuoy during fast variations of environmental conditions. Both cases require the application of a comprehensive design methodology for thruster dimensioning. The retrofitting imposes tight constraints to the layout and positioning of the thrusters. Also, the proximity to others vessels and the harsh environmental conditions in the offshore fields requires a combination of static and dynamic calculation in order to evaluate power consumption and drift motions of the vessels.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top.", "The continuous discoveries of oil fields in deep and ultra-deep Brazilian waters and the excessive wide fluctuations on the rig rates were the reasons for PETROBRAS to enhance the capability of one of its owned semi-submersible drilling rig. This paper aims to present an overview of the main technical aspects of the design and yardwork for the upgrading of semi-submersible drilling rig P-10 unit capacity from 500 m to 1200 m water depth. The upcoming ultra-deep waters scenario in Brazilian offshore, that includes East Albacora, Roncador Phase 2, South Marlim Phase 2 and East Marlin oil fields, demands a further step. Then, preliminary studies were carried out to probe the water depth limit, without hull upgrading, just applying the technologies, that it had in mind since the beginning of this upgrading project, but still needed further tests to bridge the gap until safety utilization. Now, the deep water technologies of taut-leg mooring with polyester rope and risers for slender wells may already be considered applicable. A new pile anchor installation concept was developed, field tested and certified. Altogether, they allow one to predict the feasibility of a new upgrading for P-10 with very limited budget, keeping alive the utilization of this anchor moored drilling unit at waters possibly up to 2000 meters, a new scenario it was initially thought that could be efficiently reached only by means of dyanamic positioning units.", "Everyday thousands of people commute to offshore platforms in Brazil. The presence of a remote terminal, the so-called HUB, adjacent to the platforms, not only reduces the shipment costs, but also increases the speed of commuting. The present work addresses the feasibility of utilizing a ship shape hull as alternative logistic HUB. The work, analyzes the rigid body receiving mostly transversal currents operating as floating breakwater in deep-water, using the hull with a central turret. The crew boat is a HSV that will also include in the investigation. It is shown that this arrangement increase percentage of operating time in the site, offshore Brazil. Finally the investigation performs a stability analysis in the horizontal plane of the hull with the central turret. This is made by experimental tests in LOC (Laboratorio de Ondas e Correntes da Universidade Federal do Rio de Janeiro), combined with a time domain non-linear code." ]

[ "Recent technological advances over the past few decades have enabled the development of fully coupled atmosphere-ocean modeling prediction systems that are used today to support short-term (days to weeks) and medium-term (10–21 days) needs for both the operational and research communities. We overview the coupling framework, including model components and grid resolution considerations, as well as the coupling physics by examining heat fluxes between atmosphere and ocean, momentum transfer, and freshwater fluxes. These modeling systems can be run as fully coupled atmosphere-ocean and atmosphere-ocean-wave configurations. Examples of several modeling systems applied to complex coastal regions including Madeira Island, Adriatic Sea, Coastal California, Gulf of Mexico, Brazil, and the Maritime Continent are presented. In many of these studies, a variety of field campaigns have contributed to a better understanding of the underlying physics associated with the atmosphere-ocean feedbacks. Examples of improvements in predictive skill when run in coupled mode versus standalone are shown. Coupled model challenges such as model initialization, data assimilation, and earth system prediction are discussed." ]

[ "A1437" ]

[ "Current climate changes have several consequences, such as rising sea levels. Today, the identification of coastal vulnerabilities worldwide is necessary to prevent impacts and drive action. The aim of the work was to estimate the vulnerable areas from a total rate of increase in sea level of 2.8 m and to identify the impacts of greater magnitude through the use of hierarchical analysis. The analytic hierarchy process method was used to list the most serious impacts. In addition, the simulation of the most vulnerable sites was carried out in a GIS environment using geoprocessing and a digital terrain model for the area of study. The Ilha Grande Bay region (southeastern Brazil) was chosen as a test area due to its economic, tourist and environmental importance. The main impacts are floods, coastal erosion and loss of coastal ecosystems. The most vulnerable areas are characterized as flat with low slopes, usually coastal plains occupied by environmental protection areas, urban centers and historical centers. The methodology proved to be effective in assessing and forecasting vulnerable areas and can be applied to several types of coastal areas.", "Coastal population and size of coastal communities Although there have been calls for regular monitoring and assessment of the process of change in coastal areas (see, for example, Shi and Singh, 2003), they have largely been at the national or regional levels. Little, if anything, has been published about the total global coastal population since the early 2000s. Because of the significance of the impacts of sea level rise, studies since then have concentrated, in particular, on low-elevation coastal zones, which have a narrower scope (for example, Neumann and others, 2015). Studies in the early 2000s showed that, globally, there is a major concentration of population in the coastal zones. Figure I is based on the Global Rural-Urban Mapping Project population count grids for 2010 (Global Rural-Urban Mapping Project (GRUMP), 2011). The project uses night-time satellite data of observed light sources to identify urban areas and reallocates census count data within administrative boundaries. The resulting map (figure I) shows that the global coastal population is concentrated mostly in East, South-East and South Asia. The evidence suggests that concentration in the coastal zone is increasing as a proportion of the total global population (Merkens and others, 2016). Nevertheless, access to the ocean, in particular for maritime transport, remains important for landlocked States. Urban areas near the coast reinforce the concentration: 40 per cent of the population within 100 km of the coast lives in 4 per cent of the land area within that distance (Small and Nicholls, 2003). Much of the concentration (about 90 per cent) is in coastal cities with populations of over 1 million. An analysis of such cities as recorded in The World’s Cities in 2018 (United Nations, Department of Economic and Social Affairs (UNDESA), 2018) is shown in table 1. The analysis thus shows that the main concentrations of urban coastal population are in East, South and South-East Asia, and that the most rapid rates of growth of such populations are in those regions and sub-Saharan Africa. At the other end of the scale are tens of thousands of smaller coastal communities around the world. The number of, and populations in, such communities are unknown. It seems likely, however, that the number of such communities along the coasts of the world is high, and that official local government units often contain many more than one community. For example, in Nova Scotia, Canada, a recent assessment indicates that, while there are about 50 official municipalities, there are approximately 1,000 separate coastal communities (Charles, 2020). Accordingly, there is great diversity among coastal communities across the globe, notably in differences between the big cities noted above and rural communities, where such economic activities as fishing, aquaculture, shipping and tourism are typically prominent. Whatever the size of the community, it often plays a role in stewardship of the coast. Indeed, the role of coastal communities in conservation is being increasingly recognized and valued, in terms of many local initiatives in ocean conservation, around the world, that often succeed both in improving livelihoods and protecting communities (Charles, 2017; Charles and others, 2020). The role of coastal communities in conservation is being increasingly valued. Many coastal communities around the world and their smallscale fishers have undertaken a large number of local initiatives in ocean conservation, often with considerable success. The successes of those communities are often based on local knowledge, structures and cooperation (Charles, 2017). The vulnerability of coastal communities to the impacts of climate change is of increasing concern. It is relevant to the planning of tourism development, in particular in small island developing States with economies that are dependent on tourism, and fisheries management. The Intergovernmental Panel on Climate Change concludes that, under current trends of the increasing exposure and vulnerability of coastal communities to climate change, the risks of erosion and land loss, flooding, salinization and cascading impacts owing to mean sea level rise and extreme weather events, among others, are projected to increase significantly throughout the present century (Intergovernmental Panel on Climate Change (IPCC), 2019). Coastal communities located in the Arctic, in low-lying (often deltaic) States, such as Bangladesh and Guyana, in paths frequented by cyclones or hurricanes and in densely populated megacities are especially vulnerable. On the other hand, there appear to be health benefits from living in the coastal zone (see chap. 8B on human health as affected by the ocean). Small coastal communities are not just physically vulnerable to climate change impacts; they are also socially vulnerable, in particular in rural areas (Charles and others, 2019). Rural coastal communities are vulnerable to weather events and flooding as a result of geographic location and limited access to health care, goods, transportation and other services. Sensitivity to market fluctuations from their dependence on natural resources, and poverty, limited economic opportunities and losses of populations, create problems when trying to adapt (Armitage and Tam, 2007; Amundsen, 2015; Bennett and others, 2016; Metcalf and others, 2015; May, 2019c). Such factors strain material assets, as well as the social and moral foundations that facilitate collective problem-solving (Amundsen, 2015; May, 2019a). Communities are more likely to mobilize collective resources in response to threats when people actively care about each other and the place they live (Amundsen, 2015; May, 2019b; Wilkinson, 1991). That may be a function of attachment to the history, culture or environmental context of a place and/or the people in a place. Those attachments can become potential sources of resistance to change in contexts of low social diversity and slow population change, or the basis for conflict in contexts of high social diversity and fast population change (Graham and others, 2018; May, 2019b, 2019c). The combined effect of physical and social vulnerability on community capacities is particularly challenging at a time when collective action efforts for mitigation and adaptation are more important than ever (May, 2019b, 2019c). The Intergovernmental Panel on Climate Change warns that, for our most vulnerable communities, many of which are coastal, transformative mitigation and adaptation is necessary to assuage the worst impacts of climate change. Incremental change is no longer seen as a possibility by most States: more radical action is thought to be needed to reduce the impacts of and adapt to a changing climate. Responses to threats from climate change are varied and include a mix of hard and soft coastal defences. Built infrastructure, such as sea walls or dykes, is widely used but tends to be more costly and maintenance-dependent than ecosystem-based measures, such as marshes, mangroves, reefs or seagrass (see also sect. 7.3). Having limited data inhibits estimates of the cost effectiveness of both hard and soft measures, especially across geographies and scales (Oppenheimer and others, 2019), although State-level estimates exist (see, for example, Environment Agency of the United Kingdom, 2015). The World Bank estimated that, without concrete climate and development action, over 143 million people could be forced to move within their own countries to escape the slow-onset impacts of climate change by 2050 in just three regions: sub-Saharan Africa, South Asia and Latin America (Rigaud and others, 2018). To address those problems, in coastal areas, integrated coastal zone management is widely regarded as an effective approach to climate change and other drivers (Nicholls and Klein, 2005; Nicholls and others, 2007; see also chap. 27 on management approaches).", "This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment.", "Three different packages describing the white capping dissipation process, and the corresponding energy input from wind to wave were used to study the surface wave dynamics in South Atlantic Ocean, close to the Brazilian coast. A host of statistical parameters were computed to evaluate the performance of wave model in terms of simulated bulk wave parameters. Wave measurements from a buoy deployed off Santa Catarina Island, Southern Brazil and data along the tracks of Synthetic Aperture Radars were compared with simulated bulk wave parameters; especially significant wave height, for skill assessment of different packages. It has been shown that using a single parameter representing the performance of source and sink terms in the wave model, or relying on data from only one period of simulations for model validation and skill assessment would be misleading. The model sensitivity to input parameters such as time step and grid size were addressed using multiple datasets. The wind data used for the simulation were obtained from two different sources, and provided the opportunity to evaluate the importance of input data quality. The wind speed extracted from remote sensing satellites was compared to wind datasets used for wave modeling. The simulation results showed that the wind quality and its spatial resolution is highly correlated to the quality of model output. Two different sources of wave information along the open boundaries of the model domain were used for skill assessment of a high resolution wave model for the study area. It has been shown, based on the sensitivity analysis, that the effect of using different boundary conditions would decrease as the distance from the open boundary increases; however, the difference were still noticeable at the buoy location which was located 200-300 km away from the model boundaries; but restricted to the narrow band of the low frequency wave spectrum.", "This study focuses on modeling water quality in mangroves areas including the effects of wetting and drying processes on the biogeochemistry of the mangrove. To achieve it, we use a shallow water hydrodynamics model capable ofpredicting both water quality and wetting and drying, which uses a rough-porous layer approach based on the water level. To evaluate the capabilities of the model, we consider an estuary region in Brazil to evaluate the model’s capabilities. The simulations carried out show the hydrodynamic behaviors and effects related to the water quality parameters in a complex tidal system comprised of extensive mangrove flats.", "The growth of the activities of the Petroleum Industry in the Brazilian Equatorial Margin, reinforces the need for the environmental knowledge of the region, which will be potentially exposed to risks related to such activities. The environmental importance of this region evidences the need to deepen and systematize not only the knowledge about the environmental sensitivity of the region, but also about the characteristics that will exert influence over it. The Costa Norte Project can be identified with one of these initiatives. The project has as one of the main objectives to evaluate the efficiency of the use of marine hydrodynamic environmental computational modeling methods to represent the marine dynamics over that region. In this paper a regional ocean computational model was used to produce an inedited ten year hindcast simulation in order to represent the main aspects associated with mesoscale climatological ocean circulation at the Brazilian equatorial margin. This article aims to present the methodology and the results analysis and evaluation associated to the cited hydrodynamic computational simulation. The obtained results clearly demonstrated the ocean model potential to represent the most important ocean variables space and time distribution over the studied region. Comparative analysis with observed data demonstrated good agreement with temperature, salinity and sea surface height fields generated by the implemented model. The Costa Norte Project is carrying out under the Brazilian National Petroleum Agency (ANP) R&D levy as “Investment Commitment to Research and Development” and is financially supported by Enauta O&G company.", "The effects of the global climate change on oceans and coastal areas are manifested in many ways. In coastal environments, the climate change influence on coastal ecosystems is particularly worrisome, affecting their configuration and restricting the ecosystem services they produce and their benefits to nature and society. This possible loss of ecosystem services translates well the significance of the “environmental risk” that climate change can cause. An assessment of the environmental risk generated by climate threats in coastal ecosystems was carried out through a South American case study developed on the Southern coast of Brazil – Estuary of Patos Lagoon. The study involved the implementation of a model that estimates the risk of losing ecosystem services used by different stakeholder groups as a function of (1) the climate threat, (2) the value of the service defined by the stakeholder perception, and (3) the vulnerability of each group in relation to a possible service loss. Based on information generated by scenarios predicted by the Intergovernmental Panel on Climate Change (IPCC) and from a significant database collected from interviews of several service users, the model was able to generate levels of risks for different conditions. The calculated risk values, standardized to values between zero and one, allow numerous possibilities of evaluation for ecosystems, user groups and climate variability indicators. Moreover, the model appears as a tool capable of generating comparative risk levels and can help to establish environmental management policies related to the climatic effects and the necessary adaptations.", "This paper presents an Artificial Neural Network (ANN) model developed to predict extreme sea level variation in Santos basin on the Southeast region of Brazil, related to the passage of frontal systems associated with cyclones. A methodology was developed and applied to Petrobras water deep data set. Hourly time series of water level were used in a deep point of 415 meters. 6-hourly series of atmospheric pressure and wind components from NCEP/NCAR reanalysis data set were also used from ten points over the oceanic area. Correlations and spectral analyse were verified to define the time lag between the meteorological variables and the coastal sea level response to the occurrences of the extreme atmospheric systems. These correlations and time lags were used as input variables of the ANN model. This model was compared with multiple linear regression (MLR) and presented the best performance, generalizing the effect of the atmospheric interactions on extreme sea level variations.", "The Southern Brazilian Coast is highly susceptible to storm surges that often lead to coastal flooding and erosive processes, significantly impacting coastal communities. In addition, climate change is expected to result in expressive increases in wave heights due to more intense and frequent storms, which, in conjunction with sea-level rise (SLR), has the potential to exacerbate the impact of storm surges on coastal communities. The ability to predict and simulate such events provides a powerful tool for coastal risk reduction and adaptation. In this context, this study aims to investigate how accurately storm surge events can be simulated in the Southwest Atlantic Ocean employing the coupled ADCIRC+SWAN hydrodynamic and phase-averaged wave numerical modeling framework given the significant data scarcity constraints of the region. The model’s total water level (TWL) and significant wave height (Hs) outputs, driven by different sources of meteorological forcing, i.e., the Fifth Generation of ECMWF Atmospheric Reanalysis (ERA 5), the Climate Forecast System Version 2 (CFSv2), and the Global Forecast System (GFS), were validated for three recent storm events that affected the coast (2016, 2017, and 2019). In order to assess the potentially increasing storm surge impacts due to sea-level rise, a case study was implemented to locally evaluate the modeling approach using the most accurate model setup for two 2100 SLR projections (RCP 4.5 and 8.5). Despite a TWL underestimation in all sets of simulations, the CFSv2 model stood out as the most consistent meteorological forcing for the hindcasting of the storm surge and waves in the numerical model, with an RMSE range varying from 0.19 m to 0.37 m, and an RMSE of 0.56 m for Hs during the most significant event. ERA5 was highlighted as the second most accurate meteorological forcing, while adequately simulating the peak timings. The SLR study case demonstrated a possible increase of up to 82% in the TWL during the same event. Despite the limitations imposed by the lack of continuous and densely distributed observational data, as well as up to date topobathymetric datasets, the proposed framework was capable of expanding TWL and Hs information, previously available for a handful of gauge stations, to a spatially distributed and temporally unlimited scale. This more comprehensive understanding of such extreme events represents valuable knowledge for the potential implementation of more adequate coastal management and engineering practices for the Brazilian coastal zone, especially under changing climate conditions.", "Changes in the regional hydrodynamics of the region of the South Atlantic near the east coast of Brazil were evaluated from the beginning to the end of the century. The analysis was based on the anomalies from two downscaling experiments using the HadGEM2-ES outputs for the historical and RCP4.5 runs from the Coupled Model Inter-comparison Project phase 5. The anomalies between the experiments were collected in a system of two nested grids, with 1 / 3 ° and 1 / 12 ° horizontal resolutions. A northward displacement of the Brazil Current (BC), a southward BC transport intensification, and a 1.44 °C increase of the mean values of sea surface temperatures were observed. The sea level rise (SLR) was projected up until 2100 across the study area, and the spatial variations were shown to have an average on SLR rate of 7.30 mm year- 1 for those regions close to the coast. These results highlight the importance of studying climate change and applying methods to enable the evaluation of its effects on coastal zones, especially for regions with few existing studies, such as the Brazilian continental shelf area." ]

[ "The mechanism by which seaward dipping reflectors (SDRs) are formed is a topic of debate. Two contrasting models exist for their formation, the volcanic-faulting model and the volcanic-loading model. Each of these models has important implications for the processes which control the structure and formation of magma-rich rifted continental margins. We have examined high-quality deep-seismic reflection data across the Pelotas Basin, offshore Brazil. These data reveal a remarkable set of SDRs, for which we have investigated the likely nature of their formation. The total package of SDRs has an across-strike width of ~200 km and a variable vertical thickness of ~10–17 km, previously interpreted as volcanic flows. Detailed observations, however, show changes in seismic character and geometry within the SDR package, which suggest a complex and varied evolution. We have used gravity anomaly inversion and seismic observations together to investigate the likely composition of the SDRs by determining the proportion of basaltic material to sedimentary/volcaniclastic material (basalt fraction) within the SDRs. This has been achieved by minimising the difference between the depth of the gravity Moho and seismic Moho in order to quantify the lateral variation in basalt fraction, taken to be proportional to the bulk density of the package. The density of the SDR package together with seismic interpretation is then used to infer the composition, depositional environment, source and time of formation relative to breakup. Our analysis suggests that the overall SDR basalt fraction and bulk density decrease oceanwards, possibly due a change in the type of volcanic deposits from predominantly subaerial to volcaniclastics, possibly deposited subaqueously. The SDRs can be split into three sub-packages. The two inner SDR packages are interpreted to consist of lava flows sourced from syn-tectonic, subaerial eruptions, associated with the onshore Paraná Large Igneous Province, flowing eastwards into an extensional basin. The outer SDR package shows reflector geometries that progressively offlap oceanwards, interpreted as extrusives sourced from an eastwards-migrating, newly formed ocean ridge. Our analysis suggests that both the volcanic-faulting and volcanic-loading models for SDR formation are applicable to the Pelotas rifted margin, recording distinct syn-rift and syn-breakup magmatic events. We show that both SDR formation models can be recognised in a naturally occurring example and can coexist on the same margin." ]

[ "A1373" ]

[ "This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment.", "In 1992, Brazilian Navy and PETROBRAS carried out a geophysical survey along the continental margin off northeastern Brazil, as part of a governmental plan to delineate the \"Legal Continental Shelf’ according to the international Law of the Sea. This data set is leading to a better understanding of the crustal transition processes and on the evolution of the oceanic crust over that part of the Brazilian continental margin. On our seismic transects, we show a rifted marginal plateau (Pernambuco Plateau) where crustal extension was controlled by detachment faulting, possibly in a non-volcanic margin setting. Farther north, dealing with the ocean-continent transition nearby a major transform margin, we found a normal passive margin-style transition zone instead of transform-related structures. With the support of multichannel seismic profiles and gravity data derived from GEOSAT altimetry, several well-known oceanic fracture zones and structural lineaments were properly located and correlated. The relationship of these structures with volcanic ridges and extensional, compressive and strike-slip tectonic reactivations suggests that fracture zones at this area behaved either as zones of weakness or as locked transform fault scars. Striking lithospheric flexural deformation is also related to FZs in this region. In the surroundings of the Fernando de Noronha Ridge, lithospheric flexure represents an isostatic response to volcanic loading, while bending across Ascension FZ is likely to have been caused by differential subsidence in crustal segments of contrasting ages. We also correlate some other deformation of the oceanic crust with changes in spreading directions that possibly took place at the Upper Cretaceous.", "Circular to elliptical topographic depressions, isolated or organized in trails, have been observed on the modern seabed in different contexts and water depths. Such features have been alternatively interpreted as pockmarks generated by fluid flow, as sediment waves generated by turbidity currents, or as a combination of both processes. In the latter case, the dip of the slope has been hypothesized to control the formation of trails of downslope migrating pockmarks. In this study, we use high-quality 3D seismic data from the offshore Ceará Basin (Equatorial Brazil) to examine vertically stacked and upslope-migrating trails of depressions visible at the seabed and in the subsurface. Seismic reflection terminations and stratal architecture indicate that these features are formed by cyclic steps generated by turbidity currents, while internal amplitude anomalies point to the presence of fluid migration. Amplitude Versus Offset analysis (AVO) performed on partial stacks shows that the investigated anomalies do not represent hydrocarbon indicators. Previous studies have suggested that the accumulation of permeable and porous sediments in the troughs of vertically stacked cyclic steps may create vertical pathways for fluid migration, and we propose that this may have facilitated the upward migration of saline pore water due to fluid buoyancy. The results of this study highlight the importance of gravity-driven processes in shaping the morphology of the Ceará Basin slope and show how non-hydrocarbon fluids may interact with vertically stacked cyclic steps.", "According to the literature, the tropical/subtropical oceans adjacent to South America are not climatologically conducive to tropical cyclones forming according to the literature. However, since 2004, two tropical cyclones have been recorded in the southwest Atlantic Ocean and one subtropical that had the potential to become tropical. Adequate locations for the genesis of tropical cyclones can be identified through the index of the potential of genesis, which is a methodology developed by Dr. Kerry Emanuel and collaborators. Therefore, the objective of the study is to contribute to the climatological knowledge of regions favorable to the genesis of tropical cyclones in the vicinity of South America using the genesis potential index. Moreover, we analyze some oceanic and atmospheric variables important to cyclogenesis. To this end, the ERA5 reanalysis data from the 1989-2019 period are used, which is considered state-of-the-art in terms of reanalysis. The results show the climatology of the genesis potential index, the components of this index, and other atmospheric and oceanic variables that are important for the development of tropical systems. The main result obtained in the study is the presence of potential for tropical cyclogenesis in the Atlantic Ocean along the Brazilian coast. In October, a weak signal appears between the coast of Bahia and Espírito Santo. This signal intensifies, obtaining maximum intensity between February and March when it also reaches the south coast of Brazil. Therefore, the use of a robust methodology applied in state-of-the-art data demystifies the hypothesis that there is no potential for the genesis of tropical cyclones off the coast of Brazil.", "Mapping of natural gas hydrate systems has been performed successfully in the past using the controlled source electromagnetic (CSEM) method. This method relies on differentiating resistive highly saturated free gas or hydrate bearing host sediment from a less resistive low-saturated gas or brine-bearing host sediments. Knowledge of the lateral extent and resistivity variations (and hence the saturation variations) within sediments that host hydrates is crucial to be able to accurately quantify the presence of saturated gas hydrates. A 3D CSEM survey (PUCRS14) was acquired in 2014 in the Pelotas Basin offshore Brazil, with hydrate resistivity mapping as the main objective. The survey was acquired within the context of the CONEGAS research project which investigated the origin and distribution of gas hydrate deposits in the Pelotas Basin. We inverted the acquired data using a proprietary 3D CSEM anisotropic inversion algorithm. Inversion was purely CSEM data-driven, and we did not include any a-priori information in the process. Prior to CSEM, interpretation of near-surface geophysical data including 2D seismic, sub-bottom profiler and multibeam bathymetry data indicated possible presence of gas hydrates within features identified such as faults, chimneys and seeps leading to pockmarks, along the bottom simulating reflector (BSR) and within the gas hydrate stability zone. Upon integration of the same with CSEM derived resistivity volume, the interpretation revealed excellent spatial correlation with many of these features. The interpretation further revealed new features with possible hydrate presence, which were previously overlooked due to a lack of a clear seismic and/or multibeam backscatter signature. Also, features which were previously mapped as gas hydrate bearing had to be reinterpreted as residual or low saturated gas/hydrate features, due to lack of significant resistivity response associated with them. We further used the inverted resistivity volume to derive saturation volume of the subsurface using Archie's equation.", "Oil production in ultra-deep waters places some new challenges for floating units. As an FPSO is one of most common types of production units adopted by Petrobras, its behavior in extreme conditions has to be fully tested and verified. During extreme sea storms, ship type floating structures may be subjected to water on deck events (green water). In order to allow a detailed structural analysis, Computational Fluid Dynamics (CFD) techniques may be used to investigate detailed loads due to water on deck propagation, especially in beam sea conditions, which are not traditionally covered by maritime rules. Based on model test results, water ingress and water on deck propagation are simulated through CFD analysis. The methodology adopted consists of two different approaches: (i) The influence of a riser balcony lateral extent is analyzed based on a 2D wave propagation model and; (ii) the complex flow behavior through topside equipment is discussed by using a 3D simulation of a restricted deck area, including some strategies for impact protection. The results of the simulations allow investigation of the complex flow behavior depending on the riser balcony extent and topside configuration, as well as the resulting loads on critical structures. For a side hull balcony, its protective effect against wave run-up in beam waves is only effective with a lateral extent of 8m. By performing water on deck simulations, the benefits of \"V\" type protections are quantified leading to 20% loading reduction when compared to flat plates. The simulations reveal CFD as a very powerful tool to assess detailed transient pressure distributions for optimized structural design.", "Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of Espírito Santo (Brazil) contains evidence of different sedimentary regimes that distribute diverse and complex marine habitats. Herein, seabed morphology, acoustic images of the seafloor (side scan sonar and sub-bottom profiler), and sediment samples were used to investigate the influence of sedimentary regimes on physical marine habitat distribution. Seabed mapping is also integrated with available data on fisheries to understand the influence of shelf morphology and sedimentology in the usage of distinct fishing gears. The results indicate five morpho-sedimentary facies: terrigenous mud, terrigenous sand, rhodolith beds, carbonate gravel with rhodoliths, and hardground. Through an integrated analysis of the geomorphology and sedimentary distribution, two morpho-sedimentary domains were identified: a sediment-fed shelf adjacent to the Doce River associated with a major mud depocenter and a delta front morphology characterized by gentle slopes and low terrain ruggedness, and a sediment-starved shelf dominated by carbonate sedimentation showing an irregular morphology associated with higher slopes and terrain ruggedness. These contrasting morpho-sedimentary domains are a result of sedimentary responses to sea level fluctuation during Late Quaternary, specially, during the deglaciation processes after the Last Glacial Maximum. The morphological and sedimentary contrasts along the area define the physical habitat distribution. The sediment supply regime area is associated with a terrigenous fine/muddy sedimentation bed, which control the local morphology and favors coastal and delta front progradation. This physical habitat is a well-known shrimp-fishing ground where intense trawling takes place, as well as gillnet fisheries targeting weakfish and croakers. The accommodation regime or low sediment influx area is characterized by carbonate sedimentation associated with hardgrounds and rhodolith beds. In contrast, this physical habitat with scarce sediment supply, facilitates extensive benthic colonization by crustose coralline algae (CCA), which is primarily associated to line fisheries, longlines, and spearfishing. Rhodoliths show a high diversity of CCA and the occurrence of an endemic kelp species. Long-term processes such as relative sea level fluctuations and sediment supply are a legacy for the distribution of benthic habitats, and their resulting morphology can be a surrogate for predicting fishing activities or a first-base analysis for marine spatial planning. Available low-resolution bathymetric datasets can be a powerful tool, if applied with caution and in a regional scale approach. Here, terrain variables (terrain slope and ruggedness) derived from an extensive available (low-resolution and interpolated) bathymetric dataset distinguished two contrasting morphological domains characterized by rugged and smooth/flat seabeds.", "Rifting and related normal stress regime in the equatorial continental margin of Brazil ceased during the Late Cretaceous, when the stress regimes in eastern South America and West Africa changed to induce strike-slip or reverse motion. In this study, we explore the postrift tectonic, geomorphic, magmatic, and sedimentary responses to stress changes using the Potiguar Basin, the easternmost basin in the equatorial margin of Brazil, as a case study. We use field and topographic data, 2D seismic reflection lines, vertical electric soundings, and geochronological and borehole data to constrain the stress evolution of the Potiguar Basin from the Late Cretaceous to the Quaternary, discussing the role of basin inversion on sedimentation and landforms. Our results indicate the presence of two strike-slip stress regimes after rifting. The first stress field (SF1) occurred from Late Cretaceous to the middle Miocene and consisted of a N-S-oriented maximum subhorizontal compression and an E-W-oriented extension. The second stress field (SF2) took place from the middle Miocene to the present day and included subhorizontal E-W to NW-SE compression combined with N-S and NE-SW subhorizontal extension. Emplacement of volcanic rocks occurred along transtensional faults, with a principal peak during SF1 at 20–30 Ma and a subordinate peak during SF2 at 5–10 Ma. In response to shortening during SF2, a 70-km-long and 50-km-wide dome formed, where marine Miocene strata were uplifted to ~250 m asl. This uplift induced the displacement of alluvial channels away from the dome. Anticlines formed by transpression along the main NE-SW-striking faults during both SF1 and ST2 acted as traps in the petroleum system. Similar shifts and stress field inversions documented in other areas of the Brazilian continental margin are consistent with the Neogene rise of the Andes and may have implications for reconstructing the tectonic history of the Equatorial Atlantic margin of South America.", "Petrobras has been successfully dealing with deep water floating production systems using flexible pipes since 1977. During the completion of Marlim South 3 well in 1977, Petrobras was surprised by the occurrence of two birdcage type failures. At that time, Marlim South 3, in a water depth of 1709 m was the deepest offshore production well in operation. Since then. Petrobras has been testing flexible pipes using a field test known as DIP test. In a DIP test, an empty end capped sample of a flexible pipe, about 150m long, is partially-supported by the sea bottom and connected to a lay vessel by a pipe follower or a wire rope. The flexible pipe has to withstand a 4 hour period of cyclic bending due to the motions of the lay vessel. The DIP test has provided Petrobras with information on a new failure mode: lateral buckling in the armor wire. Although a birdcage failure is equally undesirable, lateral buckling of the armor wires implies more danger because it can go unnoticed. In 2001, a research project was set up by the Research and Development Center of Petrobras that was aimed at reproducing the flexible pipe failure modes under laboratory conditions. The purpose was to obtain a better understanding of the failure process, as well as to develop testing alternatives to avoid the significant costs related to DIP tests. In order to assess the effect of cyclic bending as a major factor in degrading the longitudinal compressive strength of flexible pipes 15 destructive tests were performed on 4-inch diameter flexible pipe samples. Two test rigs that accommodated three types of test and a number of test procedures were developed in the project. The number of bending cycles to failure for each sample was determined when subjected to compressive action corresponding to its operational depth. Tests to evaluate the effect of pre-existing damage were also conducted. Special attention was devoted to the effect of layer arrangement on compressive failure. The test results clearly identified the basic failure modes under investigation (i. e. birdcaging and lateral buckling of the armor wires). Suggestions regarding simplified testing procedures and corresponding performance criteria are also presented.", "Coquinas constitute widespread deposits in lacustrine, estuarine, and shallow marine settings, where they are a valuable source of information on environmental conditions. Thick coquina successions were deposited in a series of lacustrine rift basins that formed along the Brazilian Continental Margin during the early stages of the opening of the South Atlantic Ocean, in the Early Cretaceous. In the Sergipe-Alagoas Basin, the coquina sequence, equivalent to the Morro do Chaves Formation, crops out in the Atol Quarry, and is considered a relevant analog for the economically important hydrocarbon reservoirs in the Pre-salt strata (Barremian to Aptian) of the Campos Basin (Pampo, Badejo, and Linguado oil fields), which occur only in the subsurface. The aim of this study is to generate a depositional and stratigraphic model through facies and stratigraphic analyses of a well core. These analyses allowed the geological characterization of the Morro do Chaves Formation and of its transition to the adjacent stratigraphic units, the Coqueiro Seco Formation above and the Penedo Formation below, contributing to the growing knowledge of sedimentation in rift basins and exploratory models in hydrocarbon-producing reservoirs. Facies analysis consists of sedimentological, taphonomic, and stratigraphic features of the rocks. Fourteen depositional facies were recognized, stacked into low-frequency and high-frequency, deepening-upward and shallowing-upward cycles driven by the interaction between climate and tectonism. A depositional model is presented, based on the correlation between well-core and outcrop data described in previous studies, providing insights into the spatial distribution of facies. The detailed analysis of facies and stacking patterns sheds light on depositional processes, paleoenvironmental conditions, and the evolution of the system through time, so we may better understand analogous deposits in the geological record." ]

[ "Estuarine systems are very sensitive environments to sea level rise as a consequence of climate changes, which can enhance seawater intrusion and affect multiple water uses. The seawater intrusion under sea level scenarios in an estuarine river by applying the one-dimensional hydrodynamic and water quality model HEC-RAS 5.0.5 was studied. The study was carried out at the estuarine reach of Cubatão River, in São Paulo, Brazil. Considering sea level rise scenarios of ?H = 0.25 m, 0.50 m, and 1.0 m combined with constant freshwater discharge conditions for Cubatão River (16 m3/s, mean annual discharge and 8 m3/s, dry season discharge), the model results showed that seawater intrusion moves significantly upstream the river in all cases and the maximum seawater intrusion length may reach 10 km in the worst scenario (?H = 1.0 m and 8 m3/s freshwater discharge), 70% higher than the current sea level and the mean discharge. At the local water abstraction point for urban supply, salinity concentration may reach 12 g/kg, making conventional water treatment unfeasible. Sea level rise may threaten water supply facilities and require water resource management solutions, such as water abstraction restricted times when salinity concentration is low; higher freshwater reservation; new water abstraction locations, farther the present ones; or higher water discharges in Cubatão River from a local hydroelectric power plant, which can cause water resource management conflicts." ]

[ "A1883" ]

[ "The analysis of hydrocarbons in terms of individual compounds is relevant to understand the origin and source of these substances, as well as its distribution in environmental compartments, including sediments and biota. Hydrocarbons concentrations were determined in sediments and in whole-body soft tissues of the tropical clam Anomalocardia flexuosa in sediment toxicity testing using samples of Mucuripe bay (Ceará State, NE Brazil) collected in 2011 during dredging events [1]. Data of target compounds included aliphatic (AHs) and aromatic hydrocarbons (PAHs), and linear alkylbenzenes (LABs). AHs compounds were determined on gas chromatography with flame ionization detector (GC-FID), while PAHs and LABs were determined on gas chromatography coupled to a mass spectrometer (GC/MS) in a selected ion mode (SIM). The potential of this dataset is baseline information on hydrocarbons contamination in sediments from a semi-arid region and the bioaccumulation of organic contaminants in marine organisms that can be used as models in ecotoxicological studies.", "Mapping of natural gas hydrate systems has been performed successfully in the past using the controlled source electromagnetic (CSEM) method. This method relies on differentiating resistive highly saturated free gas or hydrate bearing host sediment from a less resistive low-saturated gas or brine-bearing host sediments. Knowledge of the lateral extent and resistivity variations (and hence the saturation variations) within sediments that host hydrates is crucial to be able to accurately quantify the presence of saturated gas hydrates. A 3D CSEM survey (PUCRS14) was acquired in 2014 in the Pelotas Basin offshore Brazil, with hydrate resistivity mapping as the main objective. The survey was acquired within the context of the CONEGAS research project which investigated the origin and distribution of gas hydrate deposits in the Pelotas Basin. We inverted the acquired data using a proprietary 3D CSEM anisotropic inversion algorithm. Inversion was purely CSEM data-driven, and we did not include any a-priori information in the process. Prior to CSEM, interpretation of near-surface geophysical data including 2D seismic, sub-bottom profiler and multibeam bathymetry data indicated possible presence of gas hydrates within features identified such as faults, chimneys and seeps leading to pockmarks, along the bottom simulating reflector (BSR) and within the gas hydrate stability zone. Upon integration of the same with CSEM derived resistivity volume, the interpretation revealed excellent spatial correlation with many of these features. The interpretation further revealed new features with possible hydrate presence, which were previously overlooked due to a lack of a clear seismic and/or multibeam backscatter signature. Also, features which were previously mapped as gas hydrate bearing had to be reinterpreted as residual or low saturated gas/hydrate features, due to lack of significant resistivity response associated with them. We further used the inverted resistivity volume to derive saturation volume of the subsurface using Archie's equation.", "The paper details a modeling project to understand the uplift associated with a multicomponent towed streamer acquisition and processing workflow in the Espirito Santo basin offshore Brazil. A complex model was built representing many of the common geological features in the Espirito Santo basin including allochthonous salt bodies, post-salt anticlinal generated fractures, volcanic intrusions, and shallow meandering channels. Synthetic seismic data was generated for a number of geometries, both single and multicomponent, including a very densely sampled control measurement. The synthetic measurements were reconstructed/interpolated to a 12.5-m crossline surface receiver sampling interval. The various datasets were compared both pre- and post-migration. The results suggest that the multicomponent measurement in conjunction with multicomponent reconstruction better samples the complex waveforms.", "This work explains the process of how a bit was designed specifically to address drilling challenges of the reservoir section of the Mero Field offshore Brazil. The performance of this new bit is compared to previous bits used in the field. A systematic process to design and evaluate the performance of a new bit involves interaction with the operator to understand the challenges and gather information, evaluate previous bit performances, use software to simulate the new bit design based on drilling conditions in the field, manufacture the bit according to design specifications, run the bit according to planned parameters, capture and report results, and evaluate results to identify possible improvements. The reservoir section has a high hardness and is primarily composed of calcareous rock and silica intercalations. Since the discovery of the Mero Field, more than 17 wells have been drilled by different companies. In the majority of the wells, the reservoir section was drilled using impregnated bits and turbines. As a result, the application of a systematic process was used to solve operator challenges where a new bit was designed and run in the field to drill the reservoir section of two wells. A comparison was performed between the previous bits used in the field and the new bit concept, certifying that the new bit reduced the reservoir section drilling time by 59%. This work discusses improved drilling efficiency in the reservoir section by drilling with a new bit design in a field where only impregnated bits and turbines were used. This created a new benchmark for drilling performance in the Mero Field.", "This study describes the spatial and temporal patterns of changes in the macrobenthic communities of Guajará Bay, an estuary in northern Brazil. Samples were collected at seven sites in the dry (December 2004 and September 2005) and rainy seasons (March and June 2005). On each occasion, four biological samples and one sediment sample were collected at each site using a Petersen grab (0.039 m2). Simultaneously, the pH of the surface water, salinity, electrical conductivity and temperature were measured. Water parameters, except temperature, showed strong seasonal variation. As a general rule, pH, salinity and electrical conductivity were higher in the dry season and increased toward the mouth of the estuary. Sediment characteristics varied little in space or time. Almost 99% of all the specimens collected were annelids. The abundance and diversity of the organisms were significantly higher in the rainy season, when there was a marked increase in the abundance of oligochaetes and insect larvae, whereas polychaetes predominated during the dry season. The results of the ANOSIM indicated significant differences in the composition of the macrofaunal communities between seasons. The groups formed by the CCA reflected the distance from the mouth of the estuary. At the innermost sites, characterized by lower electrical conductivity and rich, organic sandy sediments, oligochaetes predominated, whereas at the sites further downstream, where more saline conditions predominate, polychaetes were found in higher densities. The results indicated that the structure of the macrobenthic communities in this estuarine bay are structured primarily by salinity, and secondarily by seasonal changes in rainfall rates, which affect the characteristics of both the water and sediments.", "The acoustic patterns variation can be used to understand the sediment distribution extrapolating the information to places where is not possible to take any sample. Many authors already use this integrated method to investigate interest areas in, both, commercial and scientific aspect. In this direction the current study initiated in 2009 in the frame of the Geochemistry Network PETROBRAS/CENPES, aims to track the quaternary evolution of a muddy bank situated at the coastal western boundary upwelling system (WBUS) off Cabo Frio (23oS) in the Atlantic Ocean. The WBUS is located at the north coast of the Rio de Janeiro State, Brazil. Here the coastline orientation differs from the default East-West direction of the Brazilian coast, concomitant with the boundary of the Campos and Santos Basins, the most important oil and gas basins of the country. The upwelling phenomenon occurs due to constant northeast winds. The same winds combined with the Northeast-Southwest coastline orientation also promote a curl confluence making the environment even more complex. Seismic data was acquired in cruises on board the RV Ocean Survey. Altogether 680 km was covered by a 3.5 KHz sub-bottom using the Geopulse Geoacustic System. Further, four piston cores were collected to be scan and described in physic parameters and sedimentological content, respectively. The scan was performed using a Geotek Multi Sensor Core Logger (MSCL), which measure and register the Vp, gamma density and porosity of the core. After the scan, the cores were sample and analyzed on sedimentological grain size distribution determined by a Cilas 1064 laser analyzer. The results were integrated in order to identify common trends. Three major echo-characters were described in seismic records. Grain size analysis presented a good relationship with these echos. Echo A) Transparent, represented by a sharp bottom reflector with no sub-bottom reflectors scatter of a transparent layer mapped in seismic records. The grain size distribution is more balanced with a slight higher content of sands (55 %) in the correspondent core. Echo B) Stratified described as a series of parallel sub-bottom horizons, its percentage of clays is the highest of the three cores (77 %). The last echo, C) Reflexive, is a prolonged echo with one or none sub-bottom reflector. This echo is related to the highest percentage of sands of the three cores (61%). The sediment analysis was extrapolated all over the echo-characters extension to understand the transport regime over the area. This criteria, allied to isopach map, made possible to recognize three distinct zones inside the muddy accumulation.", "This paper reports the Lessons Learned from an innovative linepipe solution that was successfully implemented on P55 Deepwater Project. The P55 field is located offshore Brazil, in the northern area of Campos Basin, in a water depth ranging from 1500m to 1900m. The scope of work consisted in engineering, procuring, fabricating and installing 16 rigid Steel Catenary Risers (SCRs), which are the first of their kind in this area. The corresponding 12-inch SCR qualification results are presented in the perspective to show the significant benefits of the technology used and its potential developments to High Pressure & High Temperature applications. In order to meet tight Hi-Lo requirements together with high fatigue performances, innovative Pipe End Design and associated automatic welding procedures were developed and qualified. The paper describes the complete sequence of pipe manufacturing process, from hot-rolling to final machining, which resulted in a concentric and reproducible pipe end geometry, ideal for limiting Stress Concentration Factors. An extensive qualification program of Full Scale Fatigue test was conducted on girth-welded strings and the associated results showed performance levels at least four times above the target curve. Moreover, Lessons Learned from the offshore campaign established that developed Pipe End Design led to significant improvements in welding times and subsequent J-laying rates. Details on how the technology effectively reduces critical times and lowers rejection rates are provided on the basis of the actual P55 offshore campaign. In addition to the advantages detailed in the paper, the presented linepipe solution proves to be also applicable to High Temperature fields, since the enhanced fatigue behavior was found to compensate a temperature derating up to 270°C. In fact, the presented manufacturing and welding technologies have opened the perspective of ongoing Developments, which are believed to bring a reliable solution for combined High Pressure and High Temperature applications.", "The use of uncertainty analysis as a tool in reservoir studies is becoming more and more common inside Petrobras and all around the world. However, in fields with production history, traditional uncertainty analysis, combining possible values of uncertainty variables, can lead to models that poorly represent the reservoir and to results that do not respect the available dynamic data. During uncertainty analysis process, history matching evaluation can considerably reduce the existing uncertainties. The methodology used in this work is based on experimental design and response surfaces. Besides the cumulative production response surface, another one is generated to represent the quality of the history matching. Only cases with a good history matching are selected as input to the Montecarlo simulation. With this technique, it is possible to evaluate the initially defined probability distributions and, if necessary, to redefine shape or limits for the probability density curve. The methodology was applied in a real study in Petrobras. There are uncertainties related to faults, absolute permeability and also related to the existing fluid properties. Although there are other wells in the same block, the studied area is located in a sea-bottom slope region, where water depth varies considerably within the block, possibly influencing the oil quality. Since there are two wells operating in the studied region, one producer and one injector, the developed analysis took the existing dynamic data into account, reducing model uncertainties.", "A deposit dated from 40 cal ka bp is interpreted as a remnant of a spodic B horizon exposed on the seabed adjacent to Guanabara Bay at an average depth of 22 m. Bathymetric data, side scan sonar imagery, and underwater images were used to map the expressive feature, never informed before. It is a semi-consolidated muddy-sand deposit with an escarpment up to 4 m and 2.5 km in length (E-W) and 1.5 km in width (N-S). Grain size and geochemical analyses were carried out, and the hypothesis of being formed by podzolization was confirmed. The paleo sea level at the time of the pedogenesis was estimated to be above the maximum height of the global eustatic curves related to Marine Isotopic Stage 3. The feature exhibits a quartzose-sand constitution, defined as an erosion surface exposed at ca. 12 ka bp. The coastal retrogradation of upper unconsolidated sediment during the last transgression contributed to the settlement of a sandbank at the bay mouth.", "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas." ]

[ "Parque das Conchas is an ultra-deepwater heavy oil development located in the northern Campos basin offshore Brazil. The project is a joint venture between Shell, Petrobras, and ONGC. The first phase of the project is the development of 3 independent subsea fields tied back to the centrally located turret moored floating, production, storage and offloading (FPSO) host facility entitled the FPSO Espirito Santo. The phase 1 Abalone, Ostra, and Argonauta B west fields are small to medium in size, with low-pressured reservoirs, and range in oil gravities from 17° to 42° API. A fourth 16° API gravity heavy oil field requiring water flood, Argonauta O north, will be tied back as part of phase 2 and is planned to be ready for production in 2013. The phase 1 subsea infrastructure consists of 10 producing wells and 1 gas injection well connected via 140 kilometers of pipelines and flowlines ranging in size from 6? to 12?, 15 flowline sleds, 2 production manifolds, 2 artificial lift manifolds housing a total of 6 vertical subsea separation caissons with 1500 hp ESP's, 25 jumpers, all of which are serviced by 30 kilometers of high voltage multi-circuit electro/hydraulic umbilicals and 20 kilometers of static electro-hydraulic umbilicals. The FPSO Espirito Santo is a converted 1975 VLCC moored in 1,780 meters of water and equipped to process 100,000 bopd, 50 MMscfpd, with 1.4 million barrels of oil storage capacity. The Parque das Conchas development is the result of a 9-year effort to understand the complex geology, identify sufficient reserves to support a development, identify an economic development concept, and to design, mature and apply the significant new technologies required to safely execute the project during an extremely volatile market period. This paper provides an overview of the development and execution of the project, highlights new technologies that have been developed and implemented and introduces the key challenges, achievements, and learning's in various parts of the project and the tight integration between all disciplines required to successfully deliver the Parque das Conchas project. Additional details can be found in the dedicated support papers have been generated and listed in the Reference section of this paper." ]

[ "A853" ]

[ "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "Forty-four companies competed for 23 blocks - 13 offshore and 10 onshore - in Brazil's second bid round in June 2000. That 21 of the 23 blocks on offer were licensed shows that the country remains a big draw among E&P firms. The top bidders include a consortium between Santa Fe Snyder (operator, 45%) and Construtora Norberto Odebrecht (15%), which paid 12.025 million real ($6.68 million) for Block BM-C-8 in the Campos basin; Shell, which offered 65.16 million real for the hotly contested Campos Block BM-C-10, for which it was the sole bidder; and Petrobras, with eight winning bids.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "Petrobras has indulged in R&D programs and technology partnerships with key contractors, opening up offshore development opportunities within Brazil. One of the main contractors helping Petrobras to achieve its goals on Marlim is FMC Technologies Inc. The subsea separation, pumping, and water reinjection system will be installed in 899 m water depth to meet the challenge of increased water production. Petrobras has awarded FMC an additional subsea separation and boosting system contract for the brownfield Congro and Corvina development, also in the Campos basin. Petrobras has recently completed its successful Procap 3000 research program, which was a driver for many of the operator's deepwater advances. In the Future Vision Procap program, the company is laying emphasis on the pursuit of solutions that could significantly alter current standards for developing deepwater fields.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "The Parque das Conchas (BC10) field offshore Brazil, operated by Shell and owned together with ONGC and QPI, has challenging reservoir conditions. Several subsea fields with viscosities ranging from 1 to 900 cP and gas volume fractions between 5% and 70% require subsea boosting to lift production fluids to the FPSO facility. Since first oil in 2009, a unique method of subsea separation and boosting has been deployed on BC-10, utilizing vertical caisson separators with Electrical Submersible Pumps (ESP's) to pump well fluids from up to 2000m water depth to the FPSO facility. Maintenance of the ESP assemblies requires an intervention using a MODU (Mobile Offshore Drilling Unit). Shell pursued an alternative subsea boosting solution using Mudline Pump (MLP) technology, with the objective to reduce field Opex and increase redundancy. The MLP was conceived as a retrofit module, which was to be fully compatible with the existing infrastructure. This includes using existing variable frequency drives, high voltage umbilicals, subsea mechanical interfaces, controls, hydraulics, and chemical injection. Despite the prior development of a 3 MW (megawatt) MudLine Pump (MK1), the specifics of the BC10 application required further development and qualification. The design pressure was increased from 5,000 psi to 7,500 psi, which required requalification of motor and barrier fluid circuit components. Additionally, the challenging multiphase flow conditions led to the development of an innovative control strategy to maximise the production window, whilst ensuring safe operating conditions for the pump within the existing system constraints.", "The meteorological monitoring program for the coastal zone of Brazil was established in cooperation with public and private institutions: Navy Hydrographic Center, Brazilian Institute of Natural Resources, National Space Agency, South Santa Catarina University, Paraná Federal State University, Rio Grande do Sul Federal University, Rio Grande Federal University, Port of Itajai, Petrobras Transportation Company (Transpetro) and Santa Catarina Water and Sanitation Company (Casan). This program is carried out on 13 selected points from 33c°44'S to 20c°45'S. Each point is instrumented with air temperature, air humidity, solar radiation, atmospheric pressure, precipitation wind probes sensors. Two observing sites also measure the sea level. Telemetric systems are based on phone, cellular phone, satellite, Internet, and UHF radio. The acquisition, archival, quality control and distribution systems were developed and automated on Oracle database, and these systems update the data on an every hour basis. The web visualization was developed using a Java Platform with direct access to the database. The monitoring system is basically a public investment (92% of the stations). The private sector contributes with provisions for innovations in technology, improvement of the infrastructures and maintenance of the network. Public and private institutions have quick access to real-time information provided by a friendly software for input in their decisions in the operational activities. Time-series data support programs and research and development projects inside the universities.", "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted." ]

[ "Acoustic monitoring in oceans has grown greatly for several purposes. To meet the needs of an acoustic monitoring program of Petrobras, a Brazilian oil exploration company, an acoustic recorder was developed, called SAASS, an autonomous system for the acquisition of submarine signals. This development had as main goal, the development period and its cost, besides of course, technical requirements for that application. This work has become a very promising experience since it also allowed researches in the area of hydrophone development and acoustic signal analysis methodology. This article will describe the most relevant aspects of the development of SAASS and main strategies adopted to achieve the established objectives of Petrobras program." ]

[ "A753" ]

[ "The following paper had its development on the continental shelf of Sergipe and southern Alagoas aiming the regional mapping of geomorphological features and sedimentary cover through the study of high-resolution shallow seismic imaging, combined with bathymetry and sedimentology data on the platform. This mapping is pioneer at this region and was part of Águas Rasas Norte Project, conducted by research lab GeoRioeMar of Universidade Federal de Sergipe in partnership with PETROBRAS/CENPES, in the context of MARSEAL Project - Environmental Characterization of Sergipe and Alagoas Basin. The seismic profiles were performed by the sub-bottom profiler Edgetech 3200-XS associated with the control of collected samples. Although the interpretation of geophysical profiles have been carried out with the data without post-processing, it was possible to identify distinct reflectors and features such as reefs, carbonate banks, channels and canyons, beyond the thickness and variance of the acoustic response of distinct near-surface sediments. This preliminary characterization makes more viable seismic studies in detail about the several features and refinement of boundaries between near-surface sediments of the continental shelf of Sergipe-Alagoas. It also gives support to the interpretation of the sedimentary evolution and the possibility to expand its application to other areas such as environmental, sedimentological and geotechnical studies.", "This article presents a set of analysis and results on Shared-Actuation Control (SAC) techniques, intended for the remote control of valves in subsea manifolds. The discussion covers historical aspects, including presentation of real cases of SAC in Brazilian fields of Petrobras, as well as covers a conceptualization for the technique. The formulated concepts are used indeed to derive a methodology, intended to guide the development of SAC schemes, during engineering projects of subsea manifolds. The discussion is based in part on the unique experience accumulated by Petrobras in the last 20 years, with the development and introduction of a SAC-based subsea manifold in Campos Basin, Brazil, and the latest development efforts ongoing by 2019 for a new generation of SAC, for the application in subsea manifolds to be installed in ultra-deep waters of Pre-Salt fields, in Santos Basin, Brazil. The methodology proposed in this article is based on a comparative approach which aims to incorporate, on design of SAC, the best engineering practices and lessons learned from traditional Electric-Hydraulic Multiplexed Control Systems (EHMCSs). We refer to such approach as the Inheritance & Counterbalance (I&C) Methodology, since it is based on the application of two specific principles, namely, the Inheritance and Counterbalance Principles. The principles are proposed in this article as well. Taking as starting point a set of technical characteristics of EHMCSs, such as employment of redundant subsea electronics and methods of subsea installation, a subsea engineer can apply the I&C Principles to determine if SAC should inherit a given EHMCS characteristic or, if inheritance is not feasible for some reason, adopt alternative requisites on SAC, in order to counterbalance the effects of such no inheritance. The conceptualization of the I&C Methodology allow us effectively applying it, to obtain as result a table of engineering requisites, suitable for SAC schemes destined to subsea manifolds. The proposed table is presented in this article and incorporates several engineering aspects, which are arbitrated from the knowledge on previous applications of Petrobras in subsea control systems. Such applications include both SAC schemes and EHMCSs, featured on fields of Campos and Santos Basins.", "National sovereignty and protection require a diversity of interdependent systems that jointly provide a large infrastructure for the national security, making possible a continuous monitoring and control. These systems assure the confidential information exchange while providing more complex functionalities when working together and forming alliances known as Systems-of-Systems (SoS). This paper reports an experience in the Brazilian defense scenario, externalizing the acquired knowledge in the form of lessons learned during the conduction of a real, strategic project called SisGAAz (Blue Amazon Management System), which has its main goal to develop the Brazilian navy management SoS. In particular, we focus on reporting our experience in the architectural design of this SoS as a quality driver in our project. We also raise challenges that were overcome, and also others that must still be faced. The results communicated herein contribute to deliver a panorama of the Brazilian state of the practice about SoS engineering. Such results are important, as they report the current situation and gaps to be bridged by both academics and practitioners, not only in Brazil but also worldwide, especially in those developing countries that are also living and implementing such technological revolution.", "The acoustic patterns variation can be used to understand the sediment distribution extrapolating the information to places where is not possible to take any sample. Many authors already use this integrated method to investigate interest areas in, both, commercial and scientific aspect. In this direction the current study initiated in 2009 in the frame of the Geochemistry Network PETROBRAS/CENPES, aims to track the quaternary evolution of a muddy bank situated at the coastal western boundary upwelling system (WBUS) off Cabo Frio (23oS) in the Atlantic Ocean. The WBUS is located at the north coast of the Rio de Janeiro State, Brazil. Here the coastline orientation differs from the default East-West direction of the Brazilian coast, concomitant with the boundary of the Campos and Santos Basins, the most important oil and gas basins of the country. The upwelling phenomenon occurs due to constant northeast winds. The same winds combined with the Northeast-Southwest coastline orientation also promote a curl confluence making the environment even more complex. Seismic data was acquired in cruises on board the RV Ocean Survey. Altogether 680 km was covered by a 3.5 KHz sub-bottom using the Geopulse Geoacustic System. Further, four piston cores were collected to be scan and described in physic parameters and sedimentological content, respectively. The scan was performed using a Geotek Multi Sensor Core Logger (MSCL), which measure and register the Vp, gamma density and porosity of the core. After the scan, the cores were sample and analyzed on sedimentological grain size distribution determined by a Cilas 1064 laser analyzer. The results were integrated in order to identify common trends. Three major echo-characters were described in seismic records. Grain size analysis presented a good relationship with these echos. Echo A) Transparent, represented by a sharp bottom reflector with no sub-bottom reflectors scatter of a transparent layer mapped in seismic records. The grain size distribution is more balanced with a slight higher content of sands (55 %) in the correspondent core. Echo B) Stratified described as a series of parallel sub-bottom horizons, its percentage of clays is the highest of the three cores (77 %). The last echo, C) Reflexive, is a prolonged echo with one or none sub-bottom reflector. This echo is related to the highest percentage of sands of the three cores (61%). The sediment analysis was extrapolated all over the echo-characters extension to understand the transport regime over the area. This criteria, allied to isopach map, made possible to recognize three distinct zones inside the muddy accumulation.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "Brazilian carbonate reservoirs contain huge oil-in-place volumes and are likely to have an important economic impact in global oil industry. Such carbonate reservoirs, both Albian and Aptian, are located offshore in deep water, which has an important role in development costs. In siliciclastic plays it is standard practice to use time-lapse (4D) seismic to locate wells in unswept areas, maximizing the recovery factor. However, in carbonate plays, time-lapse seismic monitoring remains challenging, with few cases of success published around the world. Carbonates differ from siliciclastic rocks in many aspects. With a varied chemical composition and complex pore connectivity, carbonates bring on a large diversity of facies, each one showing a specific seismic response. Moreover, the usually high incompressibility of the carbonate matrix reduces sensitivity to pressure and saturation changes, which are the main effects expected on a hydrocarbon field undergoing production. Considering both the economic relevance and the difficulties of using time-lapse seismic to monitor carbonate reservoirs, Petrobras created a strategic program to face this challenge, a time-lapse seismic (S4D) study of an Albian carbonate reservoir located in the Campos Basin offshore Brazil. Three legacy data were available: streamer-1987, streamer-2002, and ocean-bottom cable-2010. Extensive feasibility studies are performed as well as a meticulous prestack 4D simultaneous inversion based on the seismic data, preliminary cross-equalized to partially overcome the initial low repeatability. A multidisciplinary interpretation conducted by a team of geophysicists, geologists, and reservoir engineers finally lead to results overcoming expectations. Saturation and pressure changes are detected using P-and S-impedance attributes, consistent with production data. Results are opening perspectives for further monitoring other carbonate reservoirs, especially with new presalt Brazilian discoveries in the Campos and Santos Basins, which might have a huge economic impact.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top.", "This work introduces a description of the complex upwelling regime off the Cabo Frio region in Brazil and shows that ocean modeling, based on the feature-oriented regional modeling system (FORMS) technique, can produce reliable predictions of sound speed fields for the corresponding shallow water environment. This work also shows, through the development of simulations, that the upwelling regime can be responsible for the creation of shadow coastal zones, in which the detection probability is too low for an acoustic source to be detected. The development of the FORMS technique and its validation with real data, for the particular region of coastal upwelling off Cabo Frio, reveals the possibility of a sustainable and reliable forecast system for the corresponding (variable in space and time) underwater acoustic environment.", "Advances in knowledge and capacity New exploration and development in offshore areas remain a major source of increasing global oil and gas production. Technological advances in the past decade have encouraged exploration in deep and ultradeep waters further away from shore and enabled the discovery of significant new reserves. The water depth capabilities for offshore exploration increased from about 3,050 m to more than 3,350 m between 2010 and 2018, while production capability using floating platforms reached almost 2,900 m in 2018, up from 2,438 m in 2010 (Barton and others, 2019). Such technological advances have in part enabled the expansion of the offshore oil and gas sector to new regions, including the eastern Mediterranean and areas off the coast of Guyana. There have also been advances in understanding the potential environmental and social impacts of exploration and production activities on the surrounding environment and in the development of new approaches to mitigate impacts. For example, the United Kingdom of Great Britain and Northern Ireland has created a Marine Noise Registry to record human activities that produce loud impulsive noise (10 Hz– 10 kHz) in the seas around its territory. This initiative intends to create baseline data and to quantify the pressure on the environment from anthropogenic activities associated with hydrocarbon exploration and development, including seismic surveys, sub-bottom profiling and pile driving. Similarly, the SERPENT project, which stands for “Scientific and Environmental ROV (remotely operated vehicle) Partnership using Existing iNdustrial Technology”, is an example of international collaboration among the scientific community, environmental regulators and the oil and gas industry to gather and provide baseline information on ecosystems around offshore oil and gas installations using cutting-edge remotely operated vehicles that can operate in the deep ocean (SERPENT Project, 2020). More recently, the offshore oil and gas industry has contributed to the MRE sector by providing expertise for the construction, maintenance and decommissioning of utility-scale offshore wind projects. The design and structural engineering concepts for the floating wind turbines, which can significantly expand the development of wind power in deeper waters associated with higher wind resources, are largely influenced by deepwater oil and gas installations (International Renewable Energy Agency, 2016).", "On the account of the absence of modern analogues, the interpretation of evaporite-bearing basins relies extensively on seismic and well data. Recent studies describe the intrasalt kinematic, geometries and compositions, relating the change of reflection patterns in seismic data to variations in evaporite sequences. However, these interpretations are only qualitative. This study describes a step further in proceeding from qualitative to quantitative interpretation of an evaporite-dominated interval. It integrates geophysical and geological foundations by combining rock physics, seismic inversion and statistical techniques to deliver seismic-driven facies volume of the evaporite sequence in the Santos Basin, offshore Brazil. Synthetic seismogram demonstrate the ambiguities and uncertainties in relating the seismic amplitude to salt types. Rock-physics analysis indicates that acoustic impedance is an effective differentiator of salt types in comparison to seismic amplitude. Therefore, we perform seismic inversion to transform interface property into layer property. The acoustic impedance volume mitigated significantly the risk of seismic interpretation in the salt sequence. The Bayesian classification integrates acoustic impedance and rock-physics analysis to deliver the seismic-driven facies volume, which categorizes bittern salts, halite and anhydrite. This enables the refinement of the seismic-stratigraphic interpretation of intrasalt sequences of the Ariri Formation based on the sedimentary cycles of evaporites. Additionally, we calculate proportion maps to evaluate the spatial variability of salt deposition. We observe an increase in bittern salts and anhydrite proportions from the bottom to the top of the sequence. The comparison between well-based and seismic-based proportions testifies to the quantitative potential of seismic data. The approach provides quantitative analysis of the evaporite sequence and can be applied to other salt-bearing basins." ]

[ "Economic activity in the ocean is expanding rapidly, with projections that, by 2030, under a business-as-usual scenario, the ocean economy could more than double to a value of more than $3 trillion, with approximately 40 million full-time jobs (Organization for Economic Cooperation and Development, 2016). Technological advances and innovations will be critical to identifying sustainable pathways that allow for the development of global economies, including the ocean economy, while addressing many of the challenges facing the ocean at present. In the context of such rapid change, regulation and governance will struggle to keep up. The integration of emerging ocean industries into existing, fragmented regulatory frameworks will restrict the ability to address pressures generated by industries in an effective and timely way. More effective integrated ocean management will be required to ensure a sustainable future for the ocean in the light of the drivers of change detailed in the present chapter and also in chapter 27. If greenhouse gas emissions continue to be released at the current rate, it is estimated that the surface temperature will warm by 1.5°C sometime between 2030 and 2052 (IPCC, 2018). Many changes to marine ecosystems as a result of climate change have already been observed, and future climate-related change and associated risks will depend on whether (and when) net zero greenhouse gas emissions are achieved and the associated rate, peak and duration of surface warming (IPCC, 2018). Even if net zero global anthropogenic CO2 emissions are achieved, sustained warming will persist for centuries to millenniums and will continue to cause further long-term changes in the climate system and, by association, in the ocean, including sea level rise and ocean acidification (IPCC, 2018). The upscaling and acceleration of mitigating and adaptive approaches will be required to reduce future climate-related risks to food security, maritime industries and coastal communities associated with changes to the marine environment. The COVID-19 pandemic is currently sweeping across the world, causing major disruption to national economies and people. In many regions, because of mitigating efforts to reduce the spread of the virus, pressures immediately affecting the ocean, such as fishing, tourism activities, pollution and greenhouse gas emissions, have been temporarily reduced. With restrictions being placed on the movement of people and on business operations, along with the closing of borders, disruption to supply chains and declining markets have affected a number of marine industries, notably fisheries. The likely impacts that reduced pressures might have on longer-term change by drivers such as climate change, however, are expected to be minimal, and it is currently unclear what benefits might be afforded to marine ecosystems. Disruptions to global supply chains have highlighted the need in many countries to strengthen local supply chains and, in particular, to explore e-commerce options for supporting supply chains in general." ]

[ "B2080" ]

[ "Theme E Increased use of ocean space, especially in coastal areas, create conflicting demands for dedicated marine space. This arises both from the expansion of long-standing uses of the ocean (such as fishing and shipping) and from newly developing uses (such as hydrocarbon extraction, mining and the generation of renewable energy conducted offshore). In most cases, those various activities are increasing without any clear overarching management system or a thorough evaluation of their cumulative impacts on the ocean environment, thus increasing the potential for conflicting and cumulative pressures. Theme F The current, and growing, levels of population and industrial and agricultural production result in increasing inputs of harmful material and excess nutrients into the ocean. Growing concentrations of population can impose, and in many areas are imposing, levels of sewage discharge that are beyond the local carrying capacity and which cause harm to human health. Even if discharges of industrial effluents and emissions were restrained to the lowest levels in proportion to production that are currently practicable, continuing growth in production would result in increased inputs to the ocean. The growing use of plastics that degrade very slowly result in increased quantities reaching the ocean and have many adverse effects, including the creation of large quantities of marine debris in the ocean, and negative impacts on marine life and on the aesthetic aspects of many ocean areas, and thus consequent socioeconomic effects.", "The economic consequences of increased trade and foreign investment, as a result of greater economic integration between countries, are on the global agenda. The interaction between coastal environment and the external sector is one of the most challenging topics. The convergence of these themes has being provoking a heated debate among people which are favorable and contrary to the thesis of the incompatibility between increased trade and maintaining a pattern of economic development and sustainable environment. Thesis expanded to the possible incompatibility between the movement of international financial capital and foreign direct investment and sustainability. Categorically, this applies to exploration and production (E & P) of oil in the Brazilian Pre-Salt formation. Brazil must inspect and monitor any process of exploration, mainly offshore, in the coastal territory of its jurisdiction. In this respect, it is noteworthy that PETROBRAS (the lead oil company in the country) has become the technology leader in deep and ultra-deep waters, which guarantees to Brazil at the time, the control of its maritime rich resources relating to exploration and exploitation of oil and natural gas. Thus, we recognize the issue of technological competition as a determinant for the productive internalization process. This process, especially among developed countries, should be understood as the result of technological capability, which multinational companies are able to appropriate due to the existence of \"overflows\" from the system. Therefore, we intend to clarify the extent to which Brazilian law \"protects\" the exploitation of natural resources, especially hydrocarbons, from a coastal environment approach.", "Distribution of ocean benefits and disbenefits Developments in maritime transport All sectors of maritime transport (cargo trades, passenger and vehicle ferries and cruise ships) are growing in line with the world economy. It is not possible to estimate the earnings from those activities, as the structure of the companies owning many of the ships involved is opaque. It seems likely that many of the major cargo-carrying operators were making a loss in 2012, as a result of overcapacity resulting from the general economic recession. On the other hand, cruise operators reported profits. According to estimates by the United Nations Conference on Trade and Development, owners from five countries (China, Germany, Greece, Japan and the Republic of Korea) together accounted for 53 per cent of the world tonnage in 2013. It seems likely that profits and losses are broadly proportional to ownership. Among the top 35 ship-owning countries and territories, 17 are in Asia, 14 in Europe and 4 in the Americas. Worldwide, there are just over 1.25 million seafarers, only about 2 per cent of whom are women, mainly in the ferry and cruise-ship sectors. The crews are predominantly from countries members of the Organization for Economic Cooperation and Development and Eastern Europe (49 per cent of the officers and 34 per cent of the ratings) and from Eastern and Southern Asia (43 per cent of the officers and 51 per cent of the ratings). Africa and Latin America are noticeably underrepresented, providing only 8 per cent of the officers and 15 per cent of the ratings. Pay levels of officers differ noticeably according to their origin, with masters and chief officers from Western Europe receiving on average a fifth or a quarter, respectively, more than those from Eastern Europe or Asia, while pay levels for engineer officers are more in line with one another. The recent entry into force of the Maritime Labour Convention, 2006 should be noted in the context of the social conditions of seafarers.", "Technological advancesAreas beyond national jurisdiction have become increasingly accessible owing to technological advancements that facilitate the exploration and exploitation of deep-sea resources, including biodiversity, minerals, oil and gas. Ensuring the sustainable development of those regions will require international cooperation in order to manage them effectively. Negotiations on a legally binding international instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of the marine biological diversity of areas beyond national jurisdiction are focused on ensuring the sustainable development and conservation of those areas (see also chap. 28). The International Seabed Authority has a dual mandate of promoting the development of deep-sea minerals, while ensuring that such development is not harmful to the environment. In areas beyond national jurisdiction, appropriate planning will be required to minimize impacts on the marine environment. The uptake of technological advances for accessing and utilizing marine resources, sustainably developing marine industries and effectively managing those uses is not globally even. Many regions, in particular those where the least developed countries are located, still lack access to technologies that can assist with the sustainable use of marine resources.Changing governance structures and geopolitical instabilityThere has been an increase in nationalism and protectionism over the past decade, contributing to changing trade agreements and, more recently, the implementation of tariffs on goods between specific countries. The Democracy Index fell from 5.55 in 2014 to 5.44 in 2019, largely driven by the regional deterioration of conditions in Latin America and sub-Saharan Africa. When indices for individual countries are calculated, stark regional differences are evident. Countries in Scandinavia, the far north of North America and the South-West Pacific had the highest indices, while those in sub-Saharan Africa, the Middle East and parts of Asia had the lowest. Those differences have an impact on the implementation of global and regional treaties and agreements, thereby affecting economic growth, the transfer of technologies and the implementation of frameworks for managing ocean use, including the development of national ocean-related policies. That, therefore, affects the sustainability of human activities and the protection of marine ecosystems in those areas.Climate changeClimate change effects are not uniform across the global ocean. A number of regions are warming at higher rates than the global average and are identified as marine hotspots (Hobday and Pecl, 2014). A number of those hotspots are located where human dependence on marine resources is greatest, such as South-East Asia and Western Africa, with substantive implications for food security compared with other regions. The Arctic is another region where the ocean is warming at 2 to 3 times above the global average (IPCC, 2018). Similarly, decreases in the pH and carbonate ion concentrations of the ocean, associated with ocean acidification, and other effects of climate change, such as deoxygenation, stratification and sea level rise, are regionally variable, with highly variable impacts on the marine environment. Regional differences in such changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9.", "Theme G Adverse impacts on marine ecosystems come from the cumulative impacts of a number of human activities. Ecosystems, and their biodiversity, that might be resilient to one form or intensity of impact can be much more severely affected by a combination of impacts: the total impact of several pressures on the same ecosystem often being much larger than the sum of the individual impacts. Where biodiversity has been altered, the resilience of ecosystems to other impacts, including climate change, is often reduced. Thus the cumulative impacts of activities that, in the past, seemed to be sustainable are resulting in major changes to some ecosystems and in a reduction in the ecosystem services that they provide. Theme H The distribution around the world of the benefits drawn from the ocean is still very uneven. In some fields, this unevenness is due to the natural distribution of resources in areas under the jurisdiction of the various States (for example, hydrocarbons, minerals and some fish stocks). The distribution of some benefits is becoming less skewed: for example, the consumption of fish per capita in some developing countries is growing; the balance between cargoes loaded and unloaded in the ports of developing countries is moving closer to those in developed countries in tonnage terms. In many fields, however, including some forms of tourism and the general trade in fish, an imbalance remains between the developed and developing parts of the world. Significant differences in capacities to manage sewage, pollution and habitats also create inequities. Gaps in capacity-building hamper less developed countries in taking advantage of what the ocean can offer them, as well as reduce their capability to address the factors that degrade the ocean.", "Pressures from changes in ocean chemistry Ocean uptake of carbon dioxide emissions is rapidly changing seawater chemistry in a process known as ocean acidification (see chap. 5). As the partial pressure of carbon dioxide in seawater increases, it causes the carbonate saturation state to fall below levels suitable for globally important reef-forming taxa (Albright and others, 2018). Most coral reefs (shallow and deep) are vulnerable to rising CO2 concentrations (Lam and others, 2019). Ocean acidification is causing the depth at which seawater is corrosive to carbonate to shoal, threatening deepwater coral reefs worldwide through dissolution and intensified bioerosion (Gómez and others, 2018). Ocean acidification combines with warming, rising sea level and more severe storms to reduce reef resilience on a global scale and augment reef destruction. In the Arctic, there has been a rapid expansion in the area where surface seawater is corrosive to calcareous organisms (Brodie and others, 2014). Ocean acidification may affect all marine life, for example, through changes in gene expression, physiology, reproduction and behaviour (Riebesell and Gattuso, 2015; IPCC, 2019). Between 2005 and 2009, ocean acidification jeopardized a $270 million shellfish aquaculture industry that provided 3,200 jobs per year in Washington State, United States. Billions of oysters died in hatcheries because seawater had become corrosive to larval shells (Ekstrom and others, 2015). In addition to its negative impacts on calcifying phyto- and zooplankton, acidification can lower the nutritional value of seafood. Ocean acidification also affects ecosystem properties, functions and services. Some groups of organisms do well in acidified conditions, but many taxa do not (Agostini and others, 2018). Many algae are resilient to the levels of ocean acidification projected under the Intergovernmental Panel on Climate Change RCP 8.5 scenario, yet shifts in community composition greatly alter seaweed habitats (Brodie and others, 2014; Enochs and others, 2015). Increased carbon availability stimulates primary production and can increase the standing stock of kelps and seagrasses (Russell and others, 2013; Linares and others, 2015; Cornwall and others, 2017), although microalgae and turf algae dominate acidified waters in exposed conditions (Agostini and others, 2018; Connell and others, 2018). Research at natural marine CO2 seeps has shown that there is about a 30 per cent decrease in macrofaunal biodiversity as average pH declines from 8.1 to 7.8 (Agostini and others, 2018; Foo and others, 2018), which is attributable to direct effects, such as increased metabolic costs of coping with hypercapnia, or indirect effects, such as increased susceptibility to predation (Sunday and others, 2017). Some corals grow well in seawater with elevated CO2 concentrations, but the habitats they form lack diversity as reefs are degraded by ocean acidification owing to chemical dissolution and enhanced bioerosion, causing a shift to less diverse ecosystems. Chapter 7D also reviews the impacts of ocean acidification on coral reefs. The dual effects of increased CO2 and decreased carbonate alter trophic interactions. Reductions in the abundance and size of calcareous herbivores contribute to the overgrowth of weedy turf algae and a simplification of food webs, with losses in functional diversity (Vizzini and others, 2017; Teixidó and others, 2018).", "Integrated management of human activities affecting the ocean The Regular Process is to provide an assessment of all the aspects of the marine environment relevant to sustainable development: environmental, economic and social. Even though the marine environment covers seven tenths of the planet, it is still only one component of the overall Earth system. As far as environmental aspects are concerned, major drivers of the pressures producing change in the ocean are to be found outside the marine environment. In particular, most of the major drivers of anthropogenic climate change are land-based. Likewise, the main drivers of increased pressures on marine biodiversity and marine environmental quality include the demand for food for terrestrial populations, international trade in products from land-based agriculture and industries and coastal degradation from land-based development and land-based sources. Thus, as far as social and economic aspects of the marine environment are concerned, many of the most significant drivers are outside the scope of the present Assessment. For example, the levels of cargo shipping are driven mainly by world trade, which is determined by demand and supply for raw materials and finished products. The extent of cruising and other types of tourism is determined by the levels around the world of disposable income and leisure time. The patterns of trade in fish and other seafood and in cultural goods from the ocean are set by the location of supply and demand and the relative purchasing power of local markets as compared with international ones, modified by national and international rules on the exploitation of those resources. A wide range of factors outside the marine environment are thus relevant to policymaking for the marine environment.", "Increased use of ocean space Offshore hydrocarbon industries The growth of the offshore oil and gas industry has increased the demand by that sector for access to ocean space within areas under national jurisdiction (including space for pipelines to bring the hydrocarbon products ashore). More than 620,000 km² (almost 9 per cent) of the exclusive economic zone (EEZ) of Australia is subject to oil and gas leases. In the United States, about 550,000 km² of the whole EEZ is subject to current oil and gas leases, including 470,000 km² in the Gulf of Mexico, representing 66 per cent of the EEZ of the United States in that area. When such significant proportions of the ocean areas under national jurisdiction are thus subject to such prior claims, overlaps in sectoral interests become inevitable. Offshore mining Offshore mining is currently confined to shallow-water coastal regions, although growing exploration activity is focused on deep-sea minerals. About 75 per cent of the world’s tin, 11 per cent of gold, and 13 per cent of platinum are extracted from the placer deposits near the surface of the coastal seabed, where they have been concentrated by waves and currents. Diamonds are also an important mining target. Aggregates (sand, coral, gravel and seashells) are also important: the United Kingdom, the world’s largest producer of marine aggregates, currently extracts approximately 20 million tons of marine aggregate per year, meeting around 20 per cent of its demand. Those activities are all concentrated in coastal waters, where other demands for space are high. Deep-water deposits that have generated continuing interest, but are not currently mined, include ferromanganese nodules and crusts, polymetallic sulphides, phosphorites, and methane hydrates. Demands for deep-sea space are likely to develop in the future.", "Outlook The management of marine litter pollution is exceptionally complex and requires an integrated approach, encompassing science, legislation, economics, ocean literacy, education, social participation and international cooperation on capacity-building, and technology transfer, as well as technical and financial support at multiple levels, from the global to the regional and local levels, owing to the diversity of the actors, sources, materials, socioeconomic aspects and regulatory frameworks involved. Without improved international policies and mobilization, plastic pollution will only worsen (Jambeck and others, 2015). It is estimated that, if current consumption patterns and waste management practices do not improve, there will be about 12 billion tons of plastic litter in landfills and the natural environment by 2050 (Geyer and others, 2017). The consequences will not be purely economic, and the environmental impact will be huge. A variety of options exist to deal with critical levels of marine litter, some of which include approaches to address the issue, while understanding that not all are applicable to or supported by every country and some do not consider adverse impacts: the reduction of plastic consumption; support for eco-design and innovation (especially research into end-of-life plastic issues and alternatives); resource efficiency and better management of waste and water; long-term, efficient and viable recycling targets for municipal waste, packaging and plastic waste; greater use of policy instruments and control measures, including incentives, taxes and other regulatory measures, such as bans or extended producer responsibility schemes; and the adoption of remanufacturing initiatives and the coordination of policy investments in the waste sector (Ten Brink and others, 2018). There is also a need for tight regulation and supervision of global waste trading, especially scrap plastic. Plastic pollution is also a gateway to effective environmental education. The challenge is to change people’s perceptions and understanding of the issue, so that they can see plastic pollution as a vector of education, awareness and literacy, as well as to find potential strategies to overcome political, economic and cultural barriers. Within the context of marine litter science, the objectives may be related to policy-relevant goals and thus increase the stimulus to citizens (GESAMP, 2019).", "The rapid growth of intensive aquaculture, in some cases not well planned, has caused concern about environmental impact, human health and social issues. Although the lion’s share of production originates in Asia, opposition to aquaculture development is strongest in some developed countries (Froehlich and others, 2017), where aquaculture is still a relatively new industry competing with well-established activities. The world’s knowledge regarding the impact of climate change on aquaculture needs to be improved. Further research and investigation is necessary to improve seeds, feeds and health management. The increasing dependence of developed countries on farmed seafood imports from developing countries and insecurity regarding product environmental, social and safety credentials have sparked considerable public debate. Scientific uncertainties and conflicting information on the issues relating to seafood consumption have further confused the public. The establishment and application of third-party certification systems, covering the environmental, social and food safety concerns related to seafood, have begun to ease this situation. More research is needed to communicate the nutritional and health benefits of increased consumption of seafood. Determination of the nutritional profiles of cultured fishes and wild-caught products and quantification of the health benefits of socioeconomic improvements through aquaculture need further attention. With a growing world population, annual supply from the aquaculture sector must surpass supply from capture fisheries and reach 62 per cent in 2030 in order to maintain current consumption levels. This presents tremendous challenges to the sector, to policymakers and to the aquaculture community at large. Improving perceptions will be instrumental in achieving this goal (Vannuccini and others, 2018). Better information and exchange thereof would help in allaying concerns, dispelling myths and resolving ambiguities. To improve public awareness of aquaculture, the industry needs a more open, broader dialogue that will increase transparency. To communicate the benefits of aquaculture more effectively, it must collaborate more with stakeholder groups viewed as credible by the public. While significant social and environmental issues are still to be addressed, it is important to put aquaculture in a wider perspective by comparing its costs and benefits with those of other animal production systems and with its potential contribution to sustainable food security, given forecasted demographic pressures. However, a holistic view, with a balanced evaluation of the risks and benefits of aquaculture, has been lacking, thus impeding the development of policies that reflect production realities (Bacher, 2015)." ]

[ "The first intelligent completion was achieved in 1997, and since then reliability assurance is regarded as one of the most important themes for market implementation of this technology. Currently, intelligent completion can be found in most global oil and gas production areas, from mature land to ultra-deepwater wells like those in the Pre-Salt region, offshore Brazil. Intelligent completion technology has been applied to improve the return on investment over the life of the field. This is achieved by oil recovery enhancement, consequently increasing net present value (NPV) through selective or comingled production, efficient water or gas sweep, reduced interventions and ultimate reservoir control. Until recently, almost all intelligent completion installations in the world were fitted with remotely actuated hydraulic systems. However, there are other kinds of systems, such as electric-hydraulic and all-electric systems. The world's first all-electric intelligent completion installation was carried out in Brazil in May 2001, in the land well 8-VRG-7D-RN (Petrobras) in Mossoro (Rio Grande do Norte State) for a trial period ending in April 2002. Following this first onshore installation, a subsea deepwater well installation was carried out in August 2003 in the well 8-MLS-67HA-RJS in a water depth of 1180 m in the MarlimSul field, about 100 Km offshore Campos (Campos Basin), Rio de Janeiro State, Brazil. The installation is still operational until the present day, almost ten years after its deployment. Consequently, it is difficult to understand why the electrical technology is yet to be widely applied around the world, differently from what has already happened in several other industries, like automotive and aviation. This paper does a brief comparison among hydraulic, electric-hydraulic and all-electric systems, focusing on the advantages of each system. An explanation is offered for the apparent suspicion towards all-electric technology, and a review is made on the prognosis for this system after the first installation in the world5." ]

[ "A1006" ]

[ "The world's first subsea, deepwater, all-electric intelligent completion system installed in the 8MLS-67HA-RJS well in 3,540 feet of water at Marlim Sul Field, Brazil was discussed. The 8-MLS-67HA-RJS well was a single-string, dual-zone injector well in a water-driven reservoir. The intelligent completion was subjected to extensive, rigorous testing at all phases of development. The technology used in the system allows proper injection proper water allocation, maintains production levels from the producer well, and prevents premature injection water break from the lower zone.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top.", "This paper will describe the improvement made to the reamer cutter blocks to enhance its durability and optimize the Pre-salt Well Construction Currently, most of the Brazilian's Pre-Salt wells have the last phase built-in 12.25in. In some situations, it is necessary to drill oil wells in a giant offshore field wells with five phases, enlarging the third phase from 18.125in to 22in. The high abrasiveness encountered at this phase increased the number of runs needed to drill it and, consequently, time and costs that encouraged the development of solutions. This work relates what has been observed during the last years about reaming difficulties, specifically, in the enlargement from 18.125in to 22in when facing abrasive formations. Petrobras specialists analyzed these events and concluded the matrix of the reamer's cutter blocks was wearing faster and losing the capacity to hold the PDC cutters. The hole enlargement company, that Petrobras works for nowadays, developed a process that increased the resistance of the cutter blocks by increasing the hardness of the surface material prior to the brazing of the cutters. Then, Petrobras has had the opportunity to use both modified and common cutter blocks in a challenging operation to compare their durability and the results were completely satisfactory. The modified cutter blocks had much less wearing on the same formations. Based on this operation, we can conclude this process is validated since improved the reamer cutter blocks quality and its lifetime. This paper can serve as a guide to reduce operations costs and to optimize well construction when there are concrete possibilities to enlarge abrasive formations.", "As part of the ultra-deepwater field development of the Santos Basin, 300km offshore the Brazilian coast, the Sapinhoa and Lula NE pioneering riser system was successfully installed by Subsea 7, acting as a contractor for Petrobras and partners (BG E&P Brasil and Repsol Sinopec Brasil, in Sapinhoa Field, BG E&P Brasil and Petrogal Brasil, in Lula NE Field). The full Engineering, Procurement, Installation and Commissioning (EPIC) project scope comprises the design, fabrication and installation of 4 buoys of 2800 tons moored 250m subsurface, of which 2 connect to the Floating Production, Storage and Offloading unit (FPSO) Cidade de Sao Paulo and 2 to the FPSO Cidade de Paraty; 27 Steel Catenary Risers (SCRs) with 3.9km each, 27 Pipeline End Terminations (PLETs) and anchorage suction piles at 2140m water depth. This Buoy Supporting Risers (BSR) system concept presents several advantages to overcome the challenges of installing SCRs on ultra-deep waters, such as, allowing decoupling between installation of risers and the production unit, reducing payload on the unit, reduced risks associated with clashes and very small dynamics transmitted from production unit to the risers, resulting in significant less fatigue issues. Due to sour and C02 service requirements for the production and water injection risers, it was decided to use mechanically lined pipe for the entire line, with the exception of the top and touch down sections, where metallurgical clad (metclad) pipe was used. Consequently, a significant amount of qualification, testing and inspection associated to welding lined and metclad pipes was required. In order to install Corrosion Resistant Alloys (CRA) lined pipes with a Reel-Lay vessel, a novel methodology for water pressurized spooling and pipelay was developed to mitigate the risk of liner damage during installation. Full-scale pressurized spooling trials were done ahead of the pipelay campaign for testing and validation of this methodology. In addition, analyses were performed to evaluate the BSR system behaviour during SCRs installation and to minimize buoy de-ballasting interventions. This paper describes the faced challenges and solutions engineered in the steel catenary risers' fabrication and installation scopes.", "The definition of Reservoir Rock Types (RRT) is a key challenge in the evaluation and characterization of carbonate reservoirs, and this step is critical as the RRT's define the building blocks for constructing 3D models, as RRT definition links to static and dynamic reservoir properties. This paper describes an innovative and synergetic rock typing process linking geology and petrophysical properties, with a customization of the Flow Zone Indicator (FZI) method to identify RRT's and characterize the heterogeneous oil-bearing Pre-salt carbonates of the Santos Basin, Brazil offshore. A data set of 448 MICP from the Pre-Salt carbonates of Barra Velha Formation was used to build the FZI-RRT model. The optimal number of RRTs, five in total, is determined by using an unsupervised neural network with capillary pressure parameters as inputs, permeability, effective porosity and water saturation. The five classes are delineated by FZI values at 10% porosity and key permeability values, chosen for reasons due flow properties at the core and log scale and suitability in EOR treatments. The five RRTs define a unique permeability/porosity equation that can be propagated to the full core dataset and to the log domain. An ID card for each RRT is then created with specific static and dynamic properties (porosity, permeability, water saturation, relative permeability) that can be used for 3D reservoir modeling.", "The world's largest semi-submersible crane vessel, the Micoperi 7000, was completed in September 1987. After sea trials, it was delivered to owner/operator Micoperi S. p. A. of Milan in December, and immediately left for its first construction job in Petrobras' Campos basin, offshore Brazil. In its first six months of operation, the vessel has completed its assigned tasks of platform jacket and integrated deck transport and installation as expected, including a record lift for a single revolving crane of 5700 metric tons. And it has met an unexpected challenge in helping Petrobras control the April 24 blowout and fire on Enchova platform. This article documents the history, construction, testing and first application of this amazing vessel as well as plans for its use in the Gulf of Mexico and the North Sea yet this year and in 1989. The M-7000's principal advantage is the heavy lift capability offered by the bow-mounted twin cranes designed by American Hoist and Derrick Co. Each crane can lift 7000 mt at a 41. 5-m radius, or 7000 mt revolving at 40-m radius.", "Well production in oil fields is a dynamic and complex activity. The patterns and characteristics inherent to the well, such as pressures and flow rates, are changing based on production time and the fluid composition - a complex multiphase mixture composed of oil, water, and gas. Thus, it is necessary to evaluate well behavior with periodic production tests. This paper proposes an automatic tool based on machine learning models to assist the production tests validation process in a quick manner. The developed methodology was applied to 13 representative wells of a Brazilian offshore oil field. For each examined well, a dataset is created with operation variables obtained from valid and invalid production tests. Six classification algorithms are analyzed, Logistic Regression, Naïve Bayes classifier, K-Nearest Neighbor, Decision Tree, Random Forest and Support Vector Machine (SVM) in reason to automatically label a new production test as valid or invalid, according to production historical data for the well. The dataset was divided into training and validation sets. The training set was used to perform feature selection, to calibrate and choose the proper model. The validation set was then used at the end of the procedure to evaluate obtained results, by comparing the model's output with real test labels. From the results obtained in the case study, it was possible to identify that IGLR (Injection Gas/Liquid Ratio), oil flow rate and the pressure loss between wellhead and platform were representatives for most of the wells, which implies that these variables have a huge influence at the production well test validation. Furthermore, the validation set indicates that SVM and logistic regression were the models with the best performance. Besides that, accurate results were achieved, since the model correctly classified at least 5 of the 6 tests in 70% of wells analyzed, and for the remaining wells, 4 of 6 production tests.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "The objective of this paper is to present how Petrobras is successfully managing production losses due to mineral scale formation in subsea production wells from its biggest offshore field1. Marlim Field, discovered in 1985 with a STOIIP estimated at 1,012 million STD m3 (6,369 million STB) and a field area of 146 km2 is located in water depths ranging from 600 m to 1100 m.Current Marlim Field production, around 446,754 bpd is supported by injecting 761,971 bpd of sea water. The water production is 217,150 bpd (water cut = 32%) and GOR is 82 STDm3/STDm3. A total of 117 wells are on operation, with 73 producers and 44 water injectors. The field was developed using subsea completion through the vertical, deviated and horizontal wells, equipped with cased hole and open hole gravel packed screens. Scale formation has occurred as a consequence of the incompatibility between the barium and strontium present in formation water and the high amount of sulfate in the injected seawater. To avoid production losses a plan of water management was implemented, including frequent produced water chemical analyses to investigate the convenience for applying a chemical bullhead treatment to remove scale in the production wells (tubing, screen, gravel pack and near well bore)2,3,4. This paper presents results from dissolver treatments performed in the field and also from a special investigation using a rig in a horizontal well. Valuable information was obtained in this intervention, clearing up the scaling occurrence phenomena in this scenario, allowing therefore an improvement on productivity recovery of the wells.", "Marginal Oilfields are refered to as those oilfields that are hardly developed efficiently with current technical and ecomonical conditions, characterized as high costs of development and low profit margins. However, under certain economical and technical circumstances, marginal oilfields may be transferred to be conventional ones. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin. CNPC signed a cooperation contract with Petrobras in 2013, taking 10% of the total shares. How to efficiently develop the oilfield has been a challenging issue. Technologies of smart water injection in Shengli Oilfield have been studied, while the field development and environment (deep water) of Libra Oilfield have been analyzed, in order that the smart water injection technologies may be modified to develop the marginal oilfield more efficiently. Different from conventional zonal water injection technologies, the remote wireless control water injection technologies take advantages of packers that are connected with each other via preset cables, which achieves downhole testing and water injection simultaneously. Being run via tubing, the water injection string locates a nozzle for each reservoir that is isolated by a packer. All nozzles are connected with packers via the preset cables that work as power lines for the whole string, so that downhole data such as pressures, flows and temperatures are all transferred to the processing computer on the surface. The computer program is used to convert pressure and formation signals into curves that are transferred to Company via WIFI or mobile 2G/3G/4G webs, in order that technicians there may understand and learn about downhole pressures, temperatures, flows and nozzle conditions in real time. They are able to open and close the nozzles totally or partially by giving orders that are transferred as signals via cables. In order to cope with offshore environment of Libra Oilfield in Santos Basin, pre-set cable packers have been modified accordingly, so that highly deviated wells may be developed with the smart water injection technologies. A field trial deployed in BM-C-33 Block Libra Oilfield shows that the modified smart water injection technologies are feasible for Libra Oilfield, as a novel solution to inject water in highly-deviated and horizontal wells in offshore oilfields." ]

[ "In the context of the Doce river (Southeast Brazil) Fundão dam disaster in 2015, we monitored the changes in concentrations of metal(loid)s in water and sediment and their particulate and dissolved partitioning over time. Samples were collected before, during, and after the mine tailings arrival to the Doce river estuary (pre-impact: 12, 10, 3 and 1 day; acute stage: tailing day - TD and 1 day after - DA; chronic stage: 3 months and 1 year post-disaster). Our results show that metal(loid) concentrations significantly increased with time after the disaster and changed their chemical partitioning in the water. 35.2 mg Fe L-1 and 14.4 mg Al L-1 were observed in the total (unfiltered) water during the acute stage, while aqueous Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se and Zn concentrations all exceeded both Brazilian and international safe levels for water quality. The Al, Fe and Pb partitioning coefficient log (Kd) decrease in the acute stage could be related to the high colloid content in the tailings. We continued to observe high concentrations for Al, Ba, Cd, Cr, Cu, Fe, V and Zn mainly in the particulate fraction during the chronic stage. Furthermore, the Doce river estuary had been previously contaminated by As, Ba, Cr, Cu, Mn, Ni and Pb, with a further increase in sediment through the tailing release (e.g. 9-fold increase for Cr, from 3.61 ± 2.19 ?g g-1 in the pre-impact to 32.16 ± 20.94 ?g·g-1 in the chronic stage). Doce river sediments and original tailing samples were similar in metal(loid) composition for Al, As, Cd, Cr, Cu, Fe, V and Zn. As a result, these elements could be used as geochemical markers of the Fundão tailings and considering other key parameters to define a baseline for monitoring the impacts of this environmental disaster." ]

[ "A1666" ]

[ "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.", "The present study deals with bioavailability of trace metals in the Doce river continental shelf, southeast of Brazil. The bottom sediments of the study area were firstly sampled a few weeks before the biggest environmental disaster of Brazil, the collapse of the Fundão dam in November of 2015. The disaster released around 40 Mm3 of iron ore tailings into Doce river basin and an estimate of 10 Mm3 reached the river delta, having the adjacent continental shelf as the final destination. One year and a half later, on April of 2017, the continental shelf was sampled again. A total of 48 stations were evaluated concerning concentrations of trace metals (Zn, Cu, Pb, Ni, Cr) and other ancillary variables before and after the accident. Trace metals were determined through fractionation in order to assess mobility and establish the ecological risk through RAC index. Before the accident, trace metals mobility was Pb > Ni > Cu > Zn > Cr, with Pb Cu, Ni and posing high ecological risk (RAC>30%) in many stations. Differences in concentrations of metal from pre to post accident were significant, and the increase of trace metals was observed. The mobility order after the accident changed to: Cu > Pb > Ni > Zn > Cr. Metal fractionation showed remarkable changes after the accident, with elements such as Cu, Ni and Zn highly associated with reducible fractions originated from the tailings composition. Despite the decrease of RAC to medium risk after the accident in most stations, the bioavilability of Cu, Pb, Ni and Zn increased as show by their higher accumulation in the bioavailable fractions.", "Sambaquis are archaeological shell mounds and middens formed by pre-Columbian populations inhabiting the Atlantic Forest coast of Brazil between the Middle and Late Holocene. Beyond their recognized cultural values, sambaquis are valuable biological archives for tracking changes in past biodiversity and informing modern conservation studies and management. In this contribution we reviewed the published record of faunal remains from archaeological sites located in Babitonga Bay, in the state of Santa Catarina, southern Brazil. Through a literature review covering 110 sites, we assembled a comprehensive survey of terrestrial and marine taxa exploited by human groups in this area between ca. 5500 and 370 years ago. A total of 244 species were recorded, of which 14 are currently endangered and 12 are no longer present in Babitonga Bay. This zooarchaeological synthesis provides snapshots of past biodiversity, adding a novel contribution to current debates around the conservation biology of one of the world's most threatened tropical biomes.", "Loliginid squids constitute marine resources of increasing importance in shelf ecosystems off the coast of South Brazil. However, the existing information and knowledge about the occurrence of early-life stages and causes of distributional patterns are insufficient. Here, we have revisited Brazilian historical plankton samples obtained from 11 oceanographic surveys to identify paralarvae and their abundances over time. The study area and time period cover the region between Cabo de São Tomé (22°S) and Cananéia (25°S) at depths down to 200 m from 1991 to 2005. Of the 246 paralarvae quantified, ~50% were identified to the genus or species level, including Doryteuthis spp. (D. sanpaulensis and D. plei), Lolliguncula brevis and a single specimen of Pickfordiateuthis pulchella. Paralarval occurrence and abundance peaked in different areas and were associated with distinct oceanographic conditions: D. sanpaulensis occurred in the northern region associated with cold waters and upwelling events, D. plei occurred primarily in the southern region of the study area and in warmer waters, and L. brevis was found in shallow and low salinity waters in the estuarine region off the coast of Santos. Overall, the highest abundance of paralarvae occurred in the nearshore, northernmost areas during summer, and this can be associated with the observed retention mechanisms caused by local circulation, seasonal upwelling, the intrusion of nutrient-rich waters, and spawning peaks. The present study provides new information and evidence for loliginid patterns in the area that may potentially be useful for better understanding the recruitment patterns and fishery assessments of squid populations.", "Foraminifera have demonstrated to be a good proxy of climatic changes during the Cenozoic for their high preservation in the sediment and quick responses to environmental changes. The aim of this study is to identify climate changes and the variation of marine influence during the Late Holocene, in Piraquê-Açu River Estuary (ES, Brazil). The study was based on the characterization of benthic foraminifera assemblages, ?13C and ?18O data in Ammonia tepida tests and the PA05 (2411 B.P.) and PA20 (1632 B.P.) cores. A total of 16 benthic foraminiferal species were identified in the cores. Some of them are characteristic from continental shelf environment (e.g. Lagena spp., Spiroloculina eximia, Oolina spp., Pyrulina gutta, Cibicidoides variabilis) and four are typical estuarine species (Ammonia parkinsoniana, A. tepida, Cribroelphidium excavatum and Bolivina striatula). The results allow us to identify four colder periods in the sedimentary record such as: the end of Iron Age (? 1000 B.C.), Greek Dark Ages (?450 B.C. - 100 B.C.), Dark Ages (?250 A.D. - 550 A.D.) and the Litter Ice Age (?1200 A.D. and 1850 AD.). In these periods the estuary showed an increase in confinement, which can be seen by the reduction in ecological indexes values and by the presence of only typically estuarine foraminifera species. Four warming periods were recorded in the sedimentary sequence: Greek Warming Period (? 900 B.C. - 450 B.C.), Roman Warming Period (? 50 A.D. - 250 A.D.), Medieval Warming Period (?550 A.D. - 1200 A.D.), and the fourth event represents the warming that started since the beginning of 19th Century. During warming events, the ecological indexes show higher values and species of marine habit were more constant in the sedimentary record.", "Dinoflagellate cysts are commonly used to obtain the relative ages, correlations and paleoenvironmental interpretations of the Cretaceous and Paleogenic sections of the Brazilian continental margin. However, the micropaleontological data of the Pelotas Basin is mainly concerning to calcareous microfossils, which is not true for the sedimentary deposits of the Pelotas Basin, whose micropaleontological informations is mostly referring by calcareous microfossils. In this second contribution, we present the systematic and descriptive detailing of the dinoflagellates cysts of the Ptychodiscales and Gonyaulacales orders, from the analysis of 535 samples collected from two wells (BP-01 and BP-02) drilled by Petrobras S.A. in the offshore portion of the Pelotas Basin. The levels analyzed are rich and diverse, enabling the recognition of 137 species. In greater numbers, cysts belonging to the Order Gonyaulacales include 76 genera, 133 species, besides three sub-species. Two genera and four species were assigned to the Order Ptychodiscales. Among the described taxa, 72 are cited for the first time for the Brazilian basins. The recognized associations indicated ages between the Cretaceous and the Neogene, based on the occurrences of E. dettmanniae, D. acuminatum and O. indigena for the Cretaceous; D. californica, D. carposphaeropsis and E. reticulata for the Paleocene; B. longissimum, M. fimbriatum and M. perforatum for the Eocene; C. galea, C. aubryae and H. obscura for the Miocene. R. actinocoronata and A. andalousiensis recorded at the post-Miocene levels of the basin are indicative of younger ages, possibly positioned between the Pliocene and the Pleistocene.", "This study refers to the palynological analysis of wells samples (cores) awarded by Petrobras and Eletronorte and has almost all stratigraphically positioned within the Trombetas Group, composed, from base to top by Autás-Mirim (Upper Ordovician neritic sandstones and shales); and Nhamundá (neritic sandstones of the glaciogenic deposits, of Llandovery and lower Wenlock) Formations; upper and lower Pitinga members, (upper and lower Llandovery marine Shales and diamictites and lower Ludlow); and Manacapuru Formation (neritic sandstones and pelitic rocks of upper Pridoli to Lochkovian). Three short glacial episodes are recorded in this sedimentary sequence, during the Silurian, on the Nhamundá Formation (lower Aeronian, upper Aeronian to lower Telychian and upper Telychian to lower Wenlock). This study objective the register of the stratigraphical distribution of the diversity of Deunffia and Domasia genera Silurian acritarchs of the Pitinga Formation, Amazon Basin, as well as its importance as guide-fossils once they have been presented as excelent worldwide chronostratigraphic indicators for the Llandovery/Wenlock interval. Their wide geographical distribution and restrict time occurrence in the Silurian interval, provide worldwide sharp dating and correlation of marine sequences due to this organic composition microfossil are dominant in the Paleozoic.", "Length–weight relationships (LWR) were determined for seven commercially important species of catfishes (Siluriformes, Ariidae) from the Amazon Coastal Zone (ACZ), Brazil. The analyses included 3628 specimens sampled in three trawling expeditions: dry season of 1996 (111 hauls), rainy season of 1997 (120 hauls), and dry season of 1997 (120 hauls). Bottom-trawl nets were utilized for sampling. Length-weight estimates for Amphiarius phrygiatus, Amphiarius rugispinis, Aspistor quadriscutis, Notarius grandicassis, Sciades couma, Sciades parkeri and Sciades proops.", "Based on the palynological record of core REG 972, this work aimed to reconstruct the paleoclimatic and paleoenvironmental history from 66.5 to 47 kyr BP at the south Brazilian continental margin, as well as to identify the influence of continental discharge in the southern portion of the Rio Grande Cone. Nineteen samples were processed following the standard methodology for palynological studies. Organic matter (OM) content was measured in the sediments. The age model was established according to 18O isotopes analyses in benthic foraminiferal tests. The studied interval corresponds to a glacial interval, divided in palynozones (PZs): PZIa (66.5-64.5 kyr), PZIb (64.5-53.5 kyr), and PZII (53.5-47 kyr). PZIa was characterized by drier conditions, with grassland and salt marsh taxa dominance (Cyperaceae and Amaranthaceae). During PZIb and PZII, the increase of Bryophyta, Pteridophyta, Araucaria angustifolia, Arecaceae, and Alchornea triplinervia points to wetter and warmer conditions that may be related to the beginning of marine isotope stage 3 and later to the sea-level rise. In the oceanic environment, the presence of freshwater algae and marine indicators lead to the conclusion that marine conditions prevailed during Rio Grande Cone sedimentary formation, even under low sea-level conditions when terrigenous influence was stronger. The data on OM content, dinoflagellate taxa, and mean sea level changes point to a period of low productivity during PZI. In PZII, a period of higher productivity took place because of Subantarctic Shelf Water influence, bringing cold and nutrient-rich waters to the area.", "Two sediment cores collected in the shelf off Rio de Janeiro (RJ13-01B: 10.8 cal kyr BP, and RJ13-02B: 4.7 cal kyr BP) were investigated in high-resolution to evaluate changes in sedimentary processes and paleoclimatic and paleoceanographic variability during the Holocene in the Southeastern Brazil. Information from inorganic proxies of continental input (Al/Ca and Fe/Ca), redox-sensitive elements (Fe/Al, V/Al and Mn/Al), paleoproductivity (Sr/Al, Cd/Al and Ba/Al), as well as data for grain size, geophysical properties (p-wave velocity, gamma-ray density, acoustic impedance, magnetic susceptibility and porosity), Si, total organic carbon and calcium carbonate were considered. The data revealed three main periods of sediment accumulation: (i) from 10.8 cal kyr BP to 7.6 cal kyr BP the sediment was coarse, Si content was high (27%), the magnetic susceptibility was low and the presence of shell fragments all suggest a period of low continental input and the deposition site was shallow (i.e, lower sea level); (ii) from 7.5 cal kyr BP to 4.6 cal kyr BP the elevated ratios of Al/Ca (0.69 ± 0.08), Fe/Ca (0.27 ± 0.04), Sr/Al (31.57 ± 4.47) ×10?4, Cd/Al (0.09 ± 0.03) ×10?5 and Ba/Al (0.70 ± 0.16) ×10?4 are consistent with a period of maximum sea transgression and elevated influence of the nutrient-rich South Atlantic Central Water (SACW); (iii) from 4.5 cal kyr BP to the present, events of higher fluxes of TOC, Ni, Cu and Zn were observed from ca 3.2 cal kyr BP to 3.4 cal kyr BP, in both cores, related to humid climate. Overall, the multi-proxy approach shed light on the effects of climate and oceanographic variability on sediment input and accumulation in a less-studied portion of the Brazilian shelf, which are consistent with other shelf areas and with changes in regional climate systems like the Intertropical Convergence Zone (ITCZ), South American Monsoon Systems (SAMS) and South Atlantic Convergence Zone (SACZ)." ]

[ "Changing governance structures and geopolitical instability Many international treaties and agreements, including the United Nations Convention on the Law of the Sea, the Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter of 1972, the Agreement for the Implementation of the Provisions of the United Nations Convention on the Law of the Sea of 10 December 1982 relating to the Conservation and Management of Straddling Fish Stocks and Highly Migratory Fish Stocks, the Convention on Biological Diversity and the 2030 Agenda for Sustainable Development, are aimed at reducing pressures on the marine environment and improving conservation outcomes. Targets set in association with international agreements, such as the Aichi Biodiversity Targets and the Sustainable Development Goals, have led to an increase in the establishment of marine protected areas and an associated increase in the protection of the marine environment. Regional fisheries management organizations provide for the coordination of efforts aimed at managing shared fishery resources (Haas and others, 2020), and in some regions they have provided for the implementation of effective stock rebuilding frameworks following overfishing (Hillary and others, 2016). Supporting policies implemented nationally have also improved the management of marine activities in some areas (Evans and others, 2017). However, global inequities, including those associated with wealth, gender, geography, rights and access to resources, can have implications on the effectiveness of policies designed to manage the marine environment (Balvanera and others, 2019). Furthermore, the consolidation and concentration of company ownership has resulted in a few corporations or financiers often controlling large shares of the flows in any market (e.g., Bailey and others, 2018). Corporations have increased potential to negotiate directly with Governments, which could hamper progress towards sustainable outcomes for the marine environment. Where there is conflict over access to resources and property rights, policies and agreements focused on sustainability can be undermined by such conflicts (Suárez-de Vivero and Rodríguez Mateos, 2017). In addition, instability in Governments can result in the slow or ineffectual development of policies and management frameworks, resulting in ongoing or increasing overexploitation of resources." ]

[ "B2156" ]

[ "In 2018, Brazil announced the designation of two new Large Scale Marine Protected Areas (LSMPAs), resulting in an increase in protection from 1.5% to 26.36% of the country’s maritime territory. We employ an agenda-setting theory to analyze the Brazilian LSMPAs as a causal case study, unpacking the factors that led to their creation, and providing insights about the process of reaching global targets. Drawing on a detailed literature analysis and interviews with key stakeholders, we argue that reaching an international goal is a political commitment which emerges within a ‘policy window.’ Additionally, we offer seven lessons that can improve the chances of reaching an international goal and shifting the agenda: (1) attract media attention; (2) make a formal commitment; (3) launch a movement or a campaign to attain the goal; (4) make the goals legally binding; (5) propose general international goals; (6) diffuse ideas and (7) form support groups.", "Technological advancesAreas beyond national jurisdiction have become increasingly accessible owing to technological advancements that facilitate the exploration and exploitation of deep-sea resources, including biodiversity, minerals, oil and gas. Ensuring the sustainable development of those regions will require international cooperation in order to manage them effectively. Negotiations on a legally binding international instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of the marine biological diversity of areas beyond national jurisdiction are focused on ensuring the sustainable development and conservation of those areas (see also chap. 28). The International Seabed Authority has a dual mandate of promoting the development of deep-sea minerals, while ensuring that such development is not harmful to the environment. In areas beyond national jurisdiction, appropriate planning will be required to minimize impacts on the marine environment. The uptake of technological advances for accessing and utilizing marine resources, sustainably developing marine industries and effectively managing those uses is not globally even. Many regions, in particular those where the least developed countries are located, still lack access to technologies that can assist with the sustainable use of marine resources.Changing governance structures and geopolitical instabilityThere has been an increase in nationalism and protectionism over the past decade, contributing to changing trade agreements and, more recently, the implementation of tariffs on goods between specific countries. The Democracy Index fell from 5.55 in 2014 to 5.44 in 2019, largely driven by the regional deterioration of conditions in Latin America and sub-Saharan Africa. When indices for individual countries are calculated, stark regional differences are evident. Countries in Scandinavia, the far north of North America and the South-West Pacific had the highest indices, while those in sub-Saharan Africa, the Middle East and parts of Asia had the lowest. Those differences have an impact on the implementation of global and regional treaties and agreements, thereby affecting economic growth, the transfer of technologies and the implementation of frameworks for managing ocean use, including the development of national ocean-related policies. That, therefore, affects the sustainability of human activities and the protection of marine ecosystems in those areas.Climate changeClimate change effects are not uniform across the global ocean. A number of regions are warming at higher rates than the global average and are identified as marine hotspots (Hobday and Pecl, 2014). A number of those hotspots are located where human dependence on marine resources is greatest, such as South-East Asia and Western Africa, with substantive implications for food security compared with other regions. The Arctic is another region where the ocean is warming at 2 to 3 times above the global average (IPCC, 2018). Similarly, decreases in the pH and carbonate ion concentrations of the ocean, associated with ocean acidification, and other effects of climate change, such as deoxygenation, stratification and sea level rise, are regionally variable, with highly variable impacts on the marine environment. Regional differences in such changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9.", "Cumulative impacts of human activities on marine biodiversity Ecosystems and habitats identified for special attention Considering specific types of important marine and coastal habitats, estuaries and deltas are categorized globally as in poor overall condition, based on published assessments of them for 101 regions. In 66 per cent of cases, their condition has worsened in recent years. There are around 4,500 large estuaries and deltas worldwide, of which about 10 per cent benefit from some level of environmental protection. About 0.4 per cent is protected as strict nature reserves or wilderness areas (categories Ia and Ib of the categories of protected areas as defined by the International Union for Conservation of Nature). Mangroves are being lost at the mean global rate of 1-2 per cent a year, although losses can be as high as 8 per cent a year in some countries. While the primary threat to mangroves is overexploitation of resources and the conversion of mangrove areas to other land uses, climate-change-induced sea-level rise is now identified as a global threat to them, especially in areas of growing human settlements and coastal development.", "Impacts on the marine environment Throughout all tourist areas, the major impact on the marine environment comes from coastal development, including the proportion of land covered by buildings, such as hotels, restaurants and retail shops, and transport infrastructure, including ports, airports and train terminals, and the need for hard built coastal defences, street lighting and sewerage (see also chap. 14). Where such development is not subject to effective planning and management, impacts on marine flora and fauna can be disastrous. For example, at Vlora Bay in Albania, unplanned development over 15 years has resulted in the disappearance of 50 per cent of the seagrass meadows and a substantial reduction in macroalgae (Fraschetti and others, 2011). In tourist regions, beach feeding or beach nourishment, which is the replacement of sand on beaches which have had sand removed by coastal currents or extreme weather events, can have considerable economic benefits (Klein and Osleeb, 2010). For example, in the Republic of Korea, an evaluation of the economic benefits of the restoration of the Songdo beach at Busan after typhoon damage in 2003 put the benefits at about $230 million (Chang and Yoon, 2017). The management of beaches is a significant element in managing the impacts of coastal tourism on the marine environment. Beach cleaning and the building of sea walls are generally done to give “sun, sea and sand” tourists surroundings that they find more attractive, and they have significant effects on the local flora and fauna, as recorded in the first Assessment. Studies continue to show that beaches used extensively for tourism support ecosystems that are less rich than those of comparable beaches in the same vicinity that are in protected areas, for example, along the New Jersey coast in the United States, (Kelly, 2014) and near Cadiz, Spain (Reyes-Martínez and others, 2015), and that seawalls supported 23 per cent less biodiversity and 45 per cent fewer organisms than natural shorelines (Gittman and others, 2016). Other interventions to attract tourists to beaches have included the creation of artificial surfing reefs. The limited success of such structures was recorded in the first Assessment, but there is now a report of a new venture based on an inflatable artificial reef at Bunbury, Australia (West Australian, 2019). National legislation to promote public access to coasts and beaches can also be significant.", "Increased use of ocean space Increased coastal population and urbanization (including tourism) A large proportion of humans live in the coastal zone: 38 per cent of the world’s population live within 100 km of the shore, 44 per cent within 150 km, 50 per cent within 200 km, and 67 per cent within 400 km. This proportion is steadily increasing. Consequently, there are growing demands for land in the coastal zone. Land reclamation has therefore been taking place on a large scale in many countries, particularly by reclaiming salt marshes, intertidal flats and mangroves. At the same time, where coastal land is threatened by erosion, large stretches of natural coastline have been replaced by “armoured”, artificial coastal structures. Those can significantly affect coastal currents and the ability of marine biotas to use the coast as part of their habitat. Tourist developments have also significantly increased the lengths of artificial coastline. Changes in river management, such as the construction of dams, and the building of coastal infrastructures, such as ports, can significantly change the sedimentation pattern along coasts. Such changes can increase coastal erosion and promote other coastal changes, sometimes with the effect that coastal land is lost for its current use, producing demands for replacement space.", "Impacts of climate change and related changes in the atmosphere Sea-level rise It is very likely that extreme sea-level maxima have already increased globally since the 1970s, mainly as a result of global mean sea-level rise. That rise is due in part to anthropogenic warming, causing ocean thermal expansion and the melting of glaciers and of the polar continental ice sheets. Globally averaged sea level has thus risen by 3.2 mm a year for the past two decades, of which about a third is derived from thermal expansion. Some of the remainder is due to fluxes of freshwater from the continents, which have increased as a result of the melting of continental glaciers and ice sheets. Finally, regional and local sea-level changes are also influenced by natural factors, such as regional variability in winds and ocean currents, vertical movements of the land, isostatic adjustment of the levels of land in response to changes in physical pressures on it and coastal erosion, combined with human perturbations by change in land use and coastal development. As a result, sea levels will rise more than the global mean in some regions, and will actually fall in others. A 4°C warming by 2100 (which is predicted in the high-end emissions scenario in the report of the Intergovernmental Panel on Climate Change) would lead, by the end of that period, to a median sea-level rise of nearly 1 metre above the 1980 to 1999 levels. Ocean acidification Rising concentrations of carbon dioxide in the atmosphere are resulting in increased uptake of that gas by the ocean. There is no doubt that the ocean is absorbing more and more of it: about 26 per cent of the increasing emissions of anthropogenic carbon dioxide is absorbed by the ocean, where it reacts with seawater to form carbonic acid. The resulting acidification of the ocean is occurring at different rates around the seas, but is generally decreasing the levels of calcium carbonate dissolved in seawater, thus lowering the availability of carbonate ions, which are needed for the formation by marine species of shells and skeletons. In some areas, this could affect species that are important for capture fisheries.", "Ocean resources provide the main sources of livelihoods to millions of people across the globe, as well as a wide range of ecosystem services and benefits, including oxygen production, food provision, carbon storage, minerals, genetic resources and cultural and general life support services. However, the ecosystem services from marine and coastal ecosystems are deteriorating at an alarming rate, owing to several human pressures, including climate change. Human activities are directly or indirectly affecting ecosystem services and can thus reduce or erase benefits that would otherwise be provided. As human activities in the marine environment are expected to increase in the future, in particular in areas beyond national jurisdiction, not only will they exert growing pressure on natural resources, but they may also threaten marine biodiversity and therefore the benefits that people obtain from ecosystem services. International law as reflected in the United Nations Convention on the Law of the Sea plays a crucial role in the conservation and sustainable use of the ocean and its resources and in safeguarding the many ecosystem services that the ocean provides for both current and future generations. Actions and efforts should be primarily focused on implementation and regulatory gaps, especially in areas beyond national jurisdiction. That gives added significance to the current negotiations at the United Nations on the elaboration of an international legally binding instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological biodiversity of areas beyond national jurisdiction. The distribution around the world of the benefits drawn from the ocean is still very uneven. Efforts by less developed countries to take advantage of what the ocean can offer them are hampered by gaps in capacity-building and resource and financial constraints. Capacity-building, shared scientific knowledge and collaboration to develop and transfer innovative marine technology will empower States to fully participate in and benefit from the conservation and sustainable use of the ocean and its resources and assist them in meeting their obligations.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "Theme E Increased use of ocean space, especially in coastal areas, create conflicting demands for dedicated marine space. This arises both from the expansion of long-standing uses of the ocean (such as fishing and shipping) and from newly developing uses (such as hydrocarbon extraction, mining and the generation of renewable energy conducted offshore). In most cases, those various activities are increasing without any clear overarching management system or a thorough evaluation of their cumulative impacts on the ocean environment, thus increasing the potential for conflicting and cumulative pressures. Theme F The current, and growing, levels of population and industrial and agricultural production result in increasing inputs of harmful material and excess nutrients into the ocean. Growing concentrations of population can impose, and in many areas are imposing, levels of sewage discharge that are beyond the local carrying capacity and which cause harm to human health. Even if discharges of industrial effluents and emissions were restrained to the lowest levels in proportion to production that are currently practicable, continuing growth in production would result in increased inputs to the ocean. The growing use of plastics that degrade very slowly result in increased quantities reaching the ocean and have many adverse effects, including the creation of large quantities of marine debris in the ocean, and negative impacts on marine life and on the aesthetic aspects of many ocean areas, and thus consequent socioeconomic effects.", "The coastal zone, where most of the Brazilian population lives, plays a central role for discussing vulnerability and adaptation strategies to climate change. Besides saltmarshes, mangroves and coral reefs, this region also presents seagrass beds, macroalgae and rhodolith beds, forming underwater forests, which are key habitats for services such as biodiversity conservation, O2 production, and absorption of part of the CO2 from the atmosphere. Science endorses that ocean warming and acidification, sea level rise, biological invasions and their interactions with pollution, overfishing, and other stressors undermine the structure and functioning of these ecosystems, thus increasing the region's socio-environmental vulnerability. Ecosystem conservation, management and potential bioremediation/restoration using science-based solutions must be prioritized in order to reduce the vulnerability of coastal communities and the ocean." ]

[ "Sevan Marine has let a contract to a unit of John Wood Group plc for the operation and management of the Sevan Stabilized Platform (SSP) Piranema, a floating production, storage, and offloading (FPSO) vessel. The FPSO will be operated for Petrobras in Piranema oil field off northeastern Brazil. The vessel will be the first implementation worldwide of Sevan Marine's SSP cylindrical monohull design. Piranema's design includes 30,000 bpd of oil process plant capacity, a gas injection plant with 3.6 million cu m/day of compression capacity, and 300,000 bbl of oil storage capacity. Piranema also can accommodate as many as 21 risers." ]

[ "A689" ]

[ "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Guara BV, an affiliate of Petrobras, has signed a letter of intent to charter a floating production, storage, and offloading vessel for use on Block BM-S-9 in the Santos basin offshore Brazil. The platform will have a processing capacity of ~ 100,000 bpd of oil and 5 million cu m/day of natural gas. The FPSO will be provided and operated by Modec Inc and Schahin Petroleo e Gas SA for the BM-S-9 consortium for a 20-yr period. Delivery is expected in June 2016, and production is expected to begin 2 mo after the delivery. The consortium is planning to connect at least 8 wells, 4 as producing wells and 4 for injection, to the vessel from the presalt layer in the Carioca area.", "Cottonwood is the first field development in deepwater Gulf of Mexico operated by Petrobras. It consists of three subsea wells in water depths of 670m (2,200 ft). Two wells presently produce gas-condensate, with high wax deposition potential. The wells are connected to a fixed platform in East Cameron 373 Block, 27.2 km (17 miles) away, through a piggable loop with flowlines of 15.2 cm (6?) nominal and 12.2 cm (4.8?) ID. During a pigging procedure in December 2007, a rigid, 12.9 cm (5.1?) elastomer pig got trapped halfway in the East segment of the loop, after traveling through the West segment. In front of the pig a slug of paraffin was formed and impeded its passage. During two years the production continued through the still open West segment of the production flowline. A wax mitigation plan was implemented, consisting of continuous paraffin dispersant injection. Meanwhile, low-cost, advanced technology-based methods to remove the obstruction were pursued, as an alternative to the high-cost whole or partial East flowline substitution. The procedures attempted were, first, the controlled pressurization of the flowline, second, the application of associated vibration and pressurization. These methods, along with paraffin solvent soaking procedures, helped to release the pig in February 2010, making both segments available for production. However, a layer of wax was formed inside the flowline loop and pig fragments might still be present in the East segment. A cleaning operation was performed to further clean both flowline segments. The operation consisted of injecting sea water mixed with a dispersant, an approach, to our best knowledge, not attempted before in such a long subsea tie-back. The formulations used were thoroughly laboratory tested. The operation demanded noticeable logistics planning and execution, due to the flowline volume (4000 bbl) and the number of volumes circulated (circa of 10). The operation was a success, thereby allowing the restoration of production with full flowline diameter availability and the resumption of routine pigging of the loop.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "Oil exploration in the pre-salt, mainly in the SANTOS BASIN, has increased significantly and as results increasing the number of thousands of people commute to offshore platforms in Brazil is inevitable. The presence of a remote terminal, the so-called HUB, adjacent to the platforms, not only reduces the shipment costs, but also increases the speed of commuting. The present work addresses the feasibility of utilizing a ship shape hull as an alternative logistic HUB. The present work analyzes the hull as a rigid body receiving mostly transversal waves and operating as a floating breakwater in deep water with a central turret. The crew boat is a HSV, which will also be included in the investigation. As a continuation of the previous study of the author in 2015, the relative vertical motion between two bodies is analyzed in (four) different configurations and angles of incoming waves by the panel method code in frequency domain. Finally, having in mind operation limits and criterion, operation probabilities are evaluated. Four configurations are considered to be analyzed numerically on the relative vertical motion between two bodies in different Configurations and different angles of incoming waves by a panel method code for frequency domain. Finally, operation probabilities are studied according to the operation limits and criterion.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability.", "When Petrobras' Garoupa Field production tower collapsed last September 7, the company replaced it with a provisional early production system designed to restore production until permanent platforms and pipe lines could be installed. This provisional system uses the seafloor pipe line, meter, loading tower and processing ship (Presidente Prudente Moraes) remaining from the original production system. These holdovers were combined with a 208-ton, 12-m-dia. monobuoy, an electronics control ship (Star Offshore Services marine's Star Hercules and a specially designed pipe line and manifold. This contingency system handled more than 30,000 bopd production from Garoupa and Namorado Fields while Garoupa's permanent platform was readied.", "We describe the design, implementation, and performance of a fully automated Santos Operational Forecasting System (SOFS), built to monitor and predict short-term (< 3 days) sea surface elevations, currents, temperature, and salinity in the Santos-Sao Vicente-Bertioga Estuarine System (SSVBES). The SSVBES located at 24.0?S, 46.3?W is a complex estuarine system with many interconnected channels and two connections with the open sea. The system is prone to storm tides that bring coastal flooding to and interrupt ship traffic through Santos Port. The SOFS hydrodynamic module is based on the Princeton Ocean Model (POM) version POM-rain. The SSVBES model grid is forced by tides, winds, and river runoff and is nested into a coarse-resolution South Brazil Bight (SBB) grid. The SBB grid is forced by winds, density gradients, and the Brazil Current flowing offshore. Within SSVBES, SOFS works in parallel with three real-time observation stations. The model performance was tested against observed data with a best Willmott skill of 0.97 and root mean square error (RMSE) of 13.0 cm for tidal sea level (15.9% of the mean tidal range). For tidal currents, the best skill and RMSE were above 0.99 and 3.9 cm/s (4.3% of the mean tidal current range), respectively. The coupled system was able to simulate seven storm tides with average skill of 0.95 and average RMSE of 17.0 cm. The good agreement with observed data shows the potential use of the designed system to protect both human life and assets." ]

[ "Decommissioning and abandonment of Brazilian offshore oil & gas fields has become more important in the last few years due to the maturing hydrocarbon producing basin in the region. However, a complete abandonment of a Brazilian offshore field has not been completed to date and the consequent lack of a reference case leads to uncertainties with operators and stakeholders during the conceptual phases of abandonment, when identifying the best decommissioning option and estimating a reasonable cost for the complete program of decommissioning activities. This paper aims to satisfy this uncertainty and develop a Brazilian baseline for front end planning and cost estimation of the decommissioning, removal and disposal options. The methodology presented in this paper is based on analysis of the national and international regulations applicable to decommissioning, the expectation of stakeholders and national supply chain benchmarking. Drawing on the conclusions of this analysis, the paper then presents the available decommissioning options generally applicable for fixed platform, floating platforms, pipelines and subsea facilities. The eligibility of each decommissioning option is then investigated against the background of current Brazilian regulatory requirement, highlighting those cases where the options are not mentioned in the legislation or where contradictions exist. Further analysis of the options is then undertaken to determine the preferred solution from the stakeholder perspective and to also define national supply chain benchmarking of the options to confirm whether the national supply chain can support the future potential demand for decommissioning in Brazil. Finally, the paper shows a comparative case study for the high-level planning and cost estimation for the decommissioning of a complex of small fixed platforms including the plugging and abandonment (P&A) of the platform wells." ]

[ "A1565" ]

[ "A new method developed to evaluate the performance measure of some sub-criteria of the environmental criterion in a Comparative Assessment of various options of the decommissioning of subsea installations in Brazil is presented. The method is based on an adaptation of that proposed by IBAMA in Technical Note N°. 10/2012 (TN 10) used for assessment of environmental impacts required for the licensing of offshore activities in Brazil. By requirement of the Comparative Assessment methodology, there is a need for a numerical evaluation that allows comparing the performance of one alternative over the others. An analytical method was developed based on the combination of environmental attributes that contribute for the magnitude of the impacts (frequency, intensity, extension and duration) and sensitivity of the environmental factors affected (relevance, resilience and reversibility). The importance of the impacts is given by the combination of the environmental sensitivity with the magnitude of the impacts, in the called \"Environmental Impact Importance Score Matrix\". The proposed method provides a performance measure that allows comparing and prioritizing each decommissioning option according to the proposed criteria. It reduces the subjectivity in assessing the importance of the environmental impacts and provides greater transparency and traceability in the assessment of the impacts. As an example, the proposed method is applied for the decommissioning of a rigid pipeline between two platforms in Campos Basin, where the considered decommissioning options are: (a) complete removal by cut and lift and (b) leave in situ. For this particular case, the assessment of the proposed environmental sub-criteria revealed that Option (b) was the preferred option with respect to the impacts on marine and onshore environment.", "Surface Related Multiple Elimination (SRME) has been approved to be an effective demultiple tool for marine data processing. However, it breaks down when applied to shallow water data mainly because 1) missing or contaminated near-offsets lead to inaccurate multiple models; 2) the cross-talk of short-period multiples deteriorate the matching filter during the adaptive subtraction; 3) the spectrum of the multiple model is distorted by the extra source signature. This paper proposes a new approach that combines a model-based method and a conventional SRME to serve the means of shallow water multiple elimination (SWME). The advantages include: 1) replacing the water-bottom Green's functions with broadband wavelets predicts the correct amplitudes of the multiples; 2) limiting the aperture of the Green's functions to the distance where the critical reflection occurs suppresses the artefacts in the multiple model and lowers the cost; 3) Simultaneously subtracting both the receiver- and source-side water-bottom multiples significantly improves the efficiency; 4) a following SRME helps remove the residual non-water-bottom multiples. A broadband 2D line offshore Santos, Brazil is tested with the proposed approach. It has prominently outperformed the legacy processing that used SRME and Tau-P deconvolution years ago.", "Brazil is entering the age of decommissioning, with aging offshore fields that have been in operation for more than 25 years. Brazil has migrated from an operator's monopolistic environment (with the state owned oil company, Petrobras) to a new reality in which many companies, national and international operate in Brazilian waters. As part of this new reality, Brazil has established government organizations whose aim is to coordinate the exploitation of Brazil's natural resources with the intent of optimizing activities while protecting the environment in an ever increasingly complex eco-system management. Traditionally, offshore projects follow basic phases such as conceptual, front end engineering and design (FEED), detail design, construction and commissioning. Cost allocation and schedules for these phases are all associated with production estimates and return on investment estimates. In many instances, internationally, planning for decommissioning has been deferred to an unforeseen future. Finally that far off horizon has become a reality, and domestic and foreign operators in Brazil are going through a new decommissioning awareness phase. It is the author's opinion that operators wish to comply with a well-defined frame of Brazilian and international regulations. In general, this paper aims at examining the existing regulatory environment and make recommendations on a path forward for: • Clear-cut requirements so that the permitting process flows with a minimized review cycle; • A clear set of rules, defining what abandonment options exist (e.g. complete removal vs. partial removal, on-site abandonment rules for topsides and subsea infrastructure); • A clear set of rules defining fines and sanctions for environmental violations The objectives of this paper are to 1) Gather basic information on the current status of the Brazilian Rules and Regulations, 2) Help non-government entities work together to accomplish the goals set forth by Brazilian lawmakers and officials, and 3) Develop a roadmap for convergence of the environmental agency and project stakeholders. Laws, rules and regulations, and international treaties of which Brazil is signatory are part of this environment.", "The increase of oil exploration and production in a given ocean area may put new requirements on the design of mooring systems for the floating units. It is necessary to simplify the underwater layout through the reduction of the lines horizontal span and to allow smaller distance between the production units. In this context the utilisation of taut-leg mooring system seems to be very attractive. The main object of the this paper is to present a comparison between taut-leg and conventional mooring systems in terms of total unit offset and horizontal span. It is presented, initially, the main lines of a synthesis procedure that the authors have developed to select the best configuration for the mooring system, in order to accelerate the search of the solution. In order to make the comparison between the taut-leg and the conventional mooring systems, the synthesis procedure is applied to PETROBRAS semisubmersible platforms SS-20 operating at a water depth varying from 600 to 1000 meters. The results obtained in the analysis show the great advantages of the taut-leg configuration with respect to the total offset and horizontal span.", "The high CO2 content found in Pre-Salt offshore oil fields has led to cost-energetically processes for CO2 removal and destination. In this paper, an innovative and promising alternative subsea separation process (SSP), proposed by Petrobras, was analyzed. Since a CO2 rich phase is expected at reservoir conditions, subsea gravity separators can be employed avoiding large volumes of CO2 from being sent to the topside, lowering gas processing plant complexity. A differential-algebraic system of equations (DAE) was developed for the SSP modeling. Design and steady-state simulations were carried out within EMSO simulator. To ensure the process variables remain at their desirable values two control strategies, PID and Linear Model Predictive Control (MPC), were compared. The proposed process showed technical feasibility with up to 62% GOR reduction. The control strategies presented reasonable performance. MPC had for most of the controlled variables a better performance.", "This chapter presents advances in studies related to the monitoring and development of biotechnologies for the restoration of mangrove areas in Todos os Santos Bay that have been impacted by petroleum. The results of surface sediment monitoring show that the estuary of the São Paulo River has the most pollution from petroleum-derived hydrocarbons. Our biostimulation and bioaugmentation tests indicated that in relation to a control (natural attenuation), biodegradation was more rapid when using either of these techniques. The results showed greater degradation of the saturated hydrocarbons in the units receiving a nitrogen-phosphorus-potassium fertilizer blend, indicating the better biostimulation efficacy of this fertilizer. The bioaugmentation experiment indicates that the consortiums showed promise for use in bioremediation: they increased the degradation by approximately 30%. Greater efficacy in removing organic compounds from sediments was observed in two phytoremediation models (approximately 89% removal). The three models were effective in the removal of fraction 3A (C16-23), but the two phytoremediation models achieved much greater degradation of fractions 3B (C23-34) and 4 (C34-40). The data indicate that the two phytoremediation models were more effective than the intrinsic bioremediation model in the degradation of petroleum hydrocarbons.", "Since the first World Ocean Assessment (United Nations, 2017a), the offshore oil and gas sector has continued to expand globally, in particular in deep and ultradeep waters. The use of tension leg platforms, spars and floating production, storage and offloading (FPSO) systems are key to such expansion. In the next decade, frontier regions such as the eastern Mediterranean, the east coast of South America (Brazil and Guyana), and the west coast of Africa could be the major growth drivers for offshore oil and gas exploration and production. There is an upward trend in decommissioning activity, in particular in mature regions, such as the North Sea and the Gulf of Mexico. Exploration and production practices continue to evolve to minimize potential impacts on the surrounding environment. The creation of regulatory capacity to manage offshore resources effectively, especially in frontier regions, requires significant commitment and long-term institutional investment. Technological innovation and sophisticated industrial capability built over decades by the offshore oil and gas sector are benefiting the emergence of the marine renewable energy (MRE) industry. A major thrust to the offshore hydrocarbon sector since the first Assessment is technological advancement in analysing offshore exploration and production data to enhance operational and financial efficiencies.", "All published chronostratigraphic charts of the Espírito Santo basin, Brazil, show stratigraphic frameworks based on second-order depositional sequences. The absence of published high-resolution biostratigraphic analyses precludes the proposition of a higher order stratigraphic framework. This work breaks down the second-order depositional sequences, from Campanian to Maastrichtian succession in the drift phase of Espírito Santo offshore basin, in three third-order depositional sequences based upon seismic interpretation of a hierarchical scheme of channel on continental slope setting coupled with a correlation to a global sea-level curve. The resolution of the 2D seismic data analyzed allowed the identification of three levels of erosional surfaces and their subsequent filling, from smaller to higher: composite channels, channel complexes and channel complexes set. Channel complexes development is related to lowstand deposits on the continental slope. Also, the aspect ratio of the channel complexes analyzed are reverse to the expected for channel development on continental slope settings. Usually, the further down-dip the channels are located, the higher their aspect ratio, however, it does not happen in the study case. Most of down-dip channels show a lower aspect ratio. It is ascribed to the control of the seafloor topography by the halokinetics. The identification of the geometric pattern of the channels on seismic data allowed a proposition of an exportable depositional model to predict possible sandy deposits on the continental slope regarding the intensity of salt tectonics.", "This paper shows work performed through a Joint Industry Project (JIP), aimed to enable repairs made from composite materials to be applied to metallic structural components of offshore platforms in general and FPSOs in particular. The basic motivation was to provide a repair methodology that would cause a reduced impact to platform operations, particularly in classified areas. The focus on FPSOs derived from the fact that most of them are converted tankers, originally designed for overhauling in suitable docks from time to time. That is no longer possible once they are deployed as floating platforms, intended to stay in place for twenty years or more. An important prerequisite was that the repair procedure had necessarily to have the approval of the Classification Society of the platform. The project was conducted in three phases. The objective of the first phase was to develop a qualification procedure for the repair of relevant defects with adhesive patches and to demonstrate its feasibility with simple examples. Along phase two a Project Recommended Practice for Patch Repair was issued and more qualification tests were performed. Phase three consisted of a practical application of the Recommended Practice, accomplished within Petrobras by a repair at a ballast tank of the production semisubmersible platform P-20, in operation at Campos basin. The repair was accomplished by means of carbon fiber reinforcements within a vinylester matrix. This paper describes the P-20 repair case and the design of the bonded repair. A brief overview is presented of the installation of the repair, quality assurance issues and needs for future follow-up. The experimental and theoretical studies performed in support of the repair trial are briefly described. The successful repair trial demonstrates the utility of bonded repairs in managing the integrity of offshore steel structure assets.", "In what is being called the first oil and gas sustainable commissioning project, composite abrasives are being used to help conserve precious resources. The core of this sustainable solution includes composite abrasives and an innovative Pipeline Inspection Gauge/Gadget (or pig) system, which were first field tested and then used in Petrobras Refinaria Abreu de Lima, also known as Refinaria do Nordeste (RNEST), in Brazil. This paper focuses on the commissioning of two atmospheric distillation units (ADUs) at RNEST; ADU 11 and ADU 12. During the commissioning process, residual products in pipelines are removed (1) to assure efficient flow though refinery systems and (2) to protect operating equipment. Traditional methods of pipeline cleaning during commissioning typically include cleaning with water, chemical cleaning or steam cleaning. Each of these methods use a high volume of water, produce a high volume of wastewater discharge to be treated, and some have inherent risks to commissioning personnel and/or the environment. Because no water was used during the composite abrasive blasting at RNEST, all water-related steps (e.g. conditioning, drying, special treatment, disposal and storage/disposal) were eliminated. Thus, the number of steps in the cleaning process dropped to four: (1) abrasive blasting pipe internals and (2) applying the appropriate treatment via pig, (3) hydrostatic testing and (4) water treatment/recycling. Using data from the RNEST sustainable commissioning process, this paper will compare common cleaning operations to the new sustasinable commisioning method. Results convey that sustainable commissioning at RNEST used 300,000 liters of reusable water per atmospheric distillation unit versus more than 30 million liters per unit that would have been used with tradtional methods. (This value is estimated based on the RNEST project). In addition to conserving water, sustainable commissioning at RNEST also significantly reduced the time and monetary impact of the commissioning process. The positive environmental and economic results of sustainable commissioning can carry over to similar offshore applications during the commissioning and maintenance of internal piping systems." ]

[ "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030." ]

[ "A1088" ]

[ "The Libra project is exploring and developing a very large deposit of oil and gas in the pre-salt area of Santos Basin, 100 miles offshore Brazil's coastline. Five companies have come together in a consortium together with Pré-sal Petróleo SA (PPSA) to develop this area under the country's first Production Sharing Contract (PSC). While still in the exploration phase, the project has been moving at a rapid pace, creating full field development scenarios, drilling wells, developing a system to collect dynamic reservoir information, and preparing for the initiation of its first production FPSO project. Ultimately, the field could see the drilling of nearly a hundred deepwater wells and the installation of several very large FPSOs. The area will be active with seismic, drilling, construction, production, installation and support vessels for many years. By applying industry safety statistics to the large number of man-hours required to bring these plans to life, the potential for fatalities, Lost Time Accidents (LTI's) and other HSE incidences associated with the project can be statistically extrapolated. With these figures in mind, Project Leadership embarked upon a program to substantially improve safety performance with an objective to not only develop this rare field efficiently, but to establish a legacy of exceptional HSE performance. Now three years into Libra's exploration and development, and already exceeding 20 million man-hours expended, this paper seeks to share the steps taken to improve the HSE Culture of the Libra team and the performance of its contractors and subcontractors. Examples of physical changes in specifications to improve process safety, and changes in leadership behavior will be cited. The paper will discuss the successes, challenges, and future opportunities, in the hope that broader discussion of these efforts will assist this project and the industry to achieve project objectives while assuring safe working environments.", "The paper uses a case study approach to present the challenges to develop a large and thick oil carbonate reservoir, full of opportunities but also of uncertainties. Additionally, Libra block development is under a Production Sharing Contract that was awarded to a Consortium where Petrobras is the operator in partnership with Shell, Total, CNOOC Limited and CNPC. This paper will present the main subsea technological achievements made during the execution of the Libra Extended Well Test (EWT) Project so far and also future technologies that will contribute to overcome the full field development challenges.", "Marginal Oilfields are refered to as those oilfields that are hardly developed efficiently with current technical and ecomonical conditions, characterized as high costs of development and low profit margins. However, under certain economical and technical circumstances, marginal oilfields may be transferred to be conventional ones. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin. CNPC signed a cooperation contract with Petrobras in 2013, taking 10% of the total shares. How to efficiently develop the oilfield has been a challenging issue. Technologies of smart water injection in Shengli Oilfield have been studied, while the field development and environment (deep water) of Libra Oilfield have been analyzed, in order that the smart water injection technologies may be modified to develop the marginal oilfield more efficiently. Different from conventional zonal water injection technologies, the remote wireless control water injection technologies take advantages of packers that are connected with each other via preset cables, which achieves downhole testing and water injection simultaneously. Being run via tubing, the water injection string locates a nozzle for each reservoir that is isolated by a packer. All nozzles are connected with packers via the preset cables that work as power lines for the whole string, so that downhole data such as pressures, flows and temperatures are all transferred to the processing computer on the surface. The computer program is used to convert pressure and formation signals into curves that are transferred to Company via WIFI or mobile 2G/3G/4G webs, in order that technicians there may understand and learn about downhole pressures, temperatures, flows and nozzle conditions in real time. They are able to open and close the nozzles totally or partially by giving orders that are transferred as signals via cables. In order to cope with offshore environment of Libra Oilfield in Santos Basin, pre-set cable packers have been modified accordingly, so that highly deviated wells may be developed with the smart water injection technologies. A field trial deployed in BM-C-33 Block Libra Oilfield shows that the modified smart water injection technologies are feasible for Libra Oilfield, as a novel solution to inject water in highly-deviated and horizontal wells in offshore oilfields.", "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns.", "Digital transformation has revolutionized the way companies operate in the market, changing their work processes with the inclusion of new technologies and thus influencing their culture. In the oil and gas industry, this phenomenon is more recent and is increasingly accentuating. Its importance is such that companies are adjusting their structure to accelerate the implementation of this new culture. At Petrobras this movement was no different, the corporate area responsible for the digital transformation in the company orchestrates this movement, identifying new opportunities, coordinating corporate initiatives and following the fronts already being implemented in other areas, ensuring alignment with institutional guidelines. Libr@Digital program aligned with Petrobras' Digital Transformation corporate initiative and it has been working as a testing environment to validate the solutions before scaling them up to Petrobras operations. This is so, because Libra in its structe congragates all disciplines that integrate the E&P activities, from exploration to oil offloading.", "Petrobras, as the largest operator in ultra-deep waters in South America, has been using a field development concept that has proved to be winner since 2010. This concept is well suited for fields with high productivity wells, which produce more than 20,000 barrels of oil per day. In the market, this concept is known as “satellite wells”. In this scenario, Petrobras has benefited from its strategy of standardizing subsea equipment, including Wet Christmas Trees (WCT), Flexible Pipes, Umbilicals and Subsea Manifolds. However, since the downturn of 2014, Petrobras has been struggling to simplify its own specifications, looking for the most attractive CAPEX solutions in the market, allowing suppliers to use their own knowledge and experiences to propose low cost solutions, meeting projects requirements. From 2015 onwards, Petrobras has been working with the suppliers, with the Early Engagement initiative, aiming that the integration synergies, existing assets and the experience of these suppliers, could bring to the projects, the benefits of CAPEX reduction, and allowing the advancement and approval of these projects internally in the company. Technological development programs to allow the use of flexible pipes that are resistant to contaminants such as CO2 and H2S, new CRA materials to be applied to rigid flowlines and low-cost riser configurations, have been pursued by Petrobras in order to enable the implementation of ultra-deep water projects.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "Petrobras has postponed until the end of the first half of 2006 the start of production at the offshore Peroa-Cangoa gasfields in the Espirito Santo basin because of lack of transport capacity for the fuel. The development project includes a fixed unmanned platform on Peroa and a 50-km subsea pipeline from the platform to the gas-processing plant onshore at the town of Cacimbas in Espirito Santo state. The pipeline causing the delay is the 128-km Vitoria-Cacimbas gas pipeline that Petrobras started building, but stopped construction in the fourth quarter of 2005 because the contractors abandoned the project, claiming adverse financial conditions. This is the shortest stretch of the 1400-km strategic Gasene gas pipeline project Petrobras is planning to build to link the gas-rich SE region of the country with the NE.", "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan.", "By taking a bold step forward in developing the Garoupa field offshore Brazil with subsea techniques, Petroleo Brasileiro SA (Petrobras) will benefit from early production to help satisfy the country's growing energy demand. This article describes the first phase of the development program. Petrobras is seeking a producing rate of 45,000 b/d from nine drilled wells. Wellhead cellars, in which many components, associated connections and well-control systems will be encapsulated, are described along with submarine flow lines, processing and loading, and production and processing control systems." ]

[ "As offshore oil fields are being developed towards deeper and deeper waters, new technologies are required to curb capital expenditures. In Brazil, where oil consumption is increasing and huge oil fields lie in high water depths, the issue is particularly pressing. Earlier and higher oil production from those oil fields could be attained by the use of Electrical Submersible Pumps (ESP), so far restricted to dry completions. Also longer distances from well to platform would be made practical. For the initial phase of this development, Petrobras worked together with Tronic, Reda, Pirelli, Lasalle, Sade-Vigesa and Cooper. As a result, first-in-the-world ESP installation in a subsea well has been successfully achieved on October/1994 in RJS-221, located at Carapeba Field, Campos Basin, Brazil." ]

[ "A515" ]

[ "The first intelligent completion was achieved in 1997, and since then reliability assurance is regarded as one of the most important themes for market implementation of this technology. Currently, intelligent completion can be found in most global oil and gas production areas, from mature land to ultra-deepwater wells like those in the Pre-Salt region, offshore Brazil. Intelligent completion technology has been applied to improve the return on investment over the life of the field. This is achieved by oil recovery enhancement, consequently increasing net present value (NPV) through selective or comingled production, efficient water or gas sweep, reduced interventions and ultimate reservoir control. Until recently, almost all intelligent completion installations in the world were fitted with remotely actuated hydraulic systems. However, there are other kinds of systems, such as electric-hydraulic and all-electric systems. The world's first all-electric intelligent completion installation was carried out in Brazil in May 2001, in the land well 8-VRG-7D-RN (Petrobras) in Mossoro (Rio Grande do Norte State) for a trial period ending in April 2002. Following this first onshore installation, a subsea deepwater well installation was carried out in August 2003 in the well 8-MLS-67HA-RJS in a water depth of 1180 m in the MarlimSul field, about 100 Km offshore Campos (Campos Basin), Rio de Janeiro State, Brazil. The installation is still operational until the present day, almost ten years after its deployment. Consequently, it is difficult to understand why the electrical technology is yet to be widely applied around the world, differently from what has already happened in several other industries, like automotive and aviation. This paper does a brief comparison among hydraulic, electric-hydraulic and all-electric systems, focusing on the advantages of each system. An explanation is offered for the apparent suspicion towards all-electric technology, and a review is made on the prognosis for this system after the first installation in the world5.", "The world's first subsea, deepwater, all-electric intelligent completion system installed in the 8MLS-67HA-RJS well in 3,540 feet of water at Marlim Sul Field, Brazil was discussed. The 8-MLS-67HA-RJS well was a single-string, dual-zone injector well in a water-driven reservoir. The intelligent completion was subjected to extensive, rigorous testing at all phases of development. The technology used in the system allows proper injection proper water allocation, maintains production levels from the producer well, and prevents premature injection water break from the lower zone.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "Drilling and completion in Campos Basin have been in constant evolution, from the first subsea wells and fixed platforms to latest horizontal wells in deepwater. This paper will first present the lessons learned with drilling and completion in shallow water to latest wells drilled and completed in Roncador in the range of 1,800 meters of water depth. Exploratory drilling will be also addressed. The main points to be presented are: well design, horizontal and multi lateral wells, well head design, well control, operations with dynamic positioning vessels, completion and sand control techniques and their evolution. Second, this paper will address some challenges presenting the problems as PETROBRAS see them, what are the solutions that we are adopting and what do we expect from the industry. The issues that will be presented are: well design for production of heavy oil, dual gradient drilling, intelligent completion systems for monitoring and controlling multiple zones, production or injection from or into a single well, isolation inside horizontal gravel-packed wells, gravel packing long horizontal sections under very low formation fracture gradient.", "Atlanta is a post-salt oil field located offshore Brazil in the Santos Basin, 185 km southeast of Rio de Janeiro. The combination of ultra-deepwater (1,550 m) and heavy and viscous oil (14° API and 228 cP at reservoir conditions) composes a unique challenging scenario for Electrical Submersible Pump (ESP) application. The paper discusses the performance of the ESP system utilizing field data and software simulations. The in-well ESP is the main production method and mudline ESP boosting is the backup one. Both concepts proved to be effective artificial lift solutions for the harsh flowing conditions. The in-well ESP is installed inside a capsule in a close to horizontal slant section of around 70 m. The mudline ESP boosting is readily available to become the main production method in case the in-well ESP fails. This paper discusses the challenges and solutions that proved to be successful after more than 18 months of continuous production. Software simulations and continuous production monitoring were key factors for system modeling and optimization. One of the most powerful ESPs installed inside a well worldwide to produce heavy and viscous oil from an unconsolidated reservoir represents a step forward in ultra-deepwater production system boundaries. The concept of having the mudline system as backup is also an innovative step for the offshore oil and gas industry. Two production periods are presented with very distinct and unusual characteristics: (i) one producing 12,500 bpd of a high viscous, high Gas Void Fraction (GVF), low inlet pressure and temperature crude through two mudline ESP boosting systems and (ii) another one producing 30,000 bpd through three inwell ESPs.", "ULTRA™ is a novel and advanced flow assurance coating technology recently introduced in the Brazilian market for upcoming, and challenging, offshore projects expected in the next years. This coating technology has been used for over 9 years, and has been designed, applied and installed in offshore projects worldwide. Particularly over the last year, this thermal insulation system has been applied for a major project in Brazil. It is a thermal insulation system composed of fusion bonded epoxy and styrenic materials. A base 3-layer coating, followed by one or more insulation layers of solid or foamed styrene, and a high ductility outer shield were engineered to outperform some of existing solutions in terms of hydrostatic pressure, subsea stability, overall insulation thickness and associated installation costs. Application trials have been successfully performed to validate plant capabilities for applying the wide range of styrene-based system solutions, for shallow and deep waters. Test results demonstrated that foam and solid versions have a sweet spot in which the system outperforms similar to the wet insulation solutions existing in the Brazilian market. Its solid and foam systems demonstrated capability of delivering lower U - values (Overall Heat Transfer Coefficient) due to their lower thermal conductivity. The benefit of lower thermal conductivity is reflected in a reduced coating thickness and opportunities for potential savings during the transportation and installation activities. In the coming years, the offshore industry in Brazil will demand wet insulation systems delivering improved thermal performance. Hence, lower U value with lower CAPEX and in deeper water depths. This insulation system is a proven flow assurance coating technology, addressing those challenges and now available in the Brazilian market.", "The Parque das Conchas (BC10) field offshore Brazil, operated by Shell and owned together with ONGC and QPI, has challenging reservoir conditions. Several subsea fields with viscosities ranging from 1 to 900 cP and gas volume fractions between 5% and 70% require subsea boosting to lift production fluids to the FPSO facility. Since first oil in 2009, a unique method of subsea separation and boosting has been deployed on BC-10, utilizing vertical caisson separators with Electrical Submersible Pumps (ESP's) to pump well fluids from up to 2000m water depth to the FPSO facility. Maintenance of the ESP assemblies requires an intervention using a MODU (Mobile Offshore Drilling Unit). Shell pursued an alternative subsea boosting solution using Mudline Pump (MLP) technology, with the objective to reduce field Opex and increase redundancy. The MLP was conceived as a retrofit module, which was to be fully compatible with the existing infrastructure. This includes using existing variable frequency drives, high voltage umbilicals, subsea mechanical interfaces, controls, hydraulics, and chemical injection. Despite the prior development of a 3 MW (megawatt) MudLine Pump (MK1), the specifics of the BC10 application required further development and qualification. The design pressure was increased from 5,000 psi to 7,500 psi, which required requalification of motor and barrier fluid circuit components. Additionally, the challenging multiphase flow conditions led to the development of an innovative control strategy to maximise the production window, whilst ensuring safe operating conditions for the pump within the existing system constraints.", "This paper describes the history, challenges, solutions and evolution of the Floating Production Units in Brazil. The first floating unit was on stream in 1977 at Campos Basin in Brazil. It produced from a single well with a drilling riser and dry-X-tmas tree to a MODU converted into a floating production unit and exporting to a spread-moored shuttle-tanker by a floating hose. Now, more than 40 years later, over 2,400 meters of water depth at Santos Basin are moored several floating production and storage units (FPSOs). It houses over 40 thousand metric tons of complex topsides exploiting ultra-deep wells from the pre-salt prospects. Along the evolution of the FPSOs, one major stepping-stone was the implementation of lessons learned as a feedback to create a strong foundation. This paper will depict field demands and solutions adopted to deal with the differing climates and environments as well as other particularities to develop FPSOs in Brazil. To face the technological challenges to efficiently and safely produce from ultra-deep water complex pre-salt reservoirs required the consolidated use of the expertise and experience from past projects. Initially Petrobras was well known worldwide as a Semi-Submersible company, with a unique proficiency to develop converted Semi-submersibles and other new constructions. This expertise is still present to this day, but the company has since pioneered and consolidated the use of FPSOs worldwide, leading the industry in this concept. Petrobras led the industry effort to approve FPSO international standards, local regulations with agencies and regulatory bodies by the end of '80s to early '90s. This paper will focus on the evolution of this industry, highlighting the achievements, and address the new developments and opportunities for the future.", "The trend in subsea completions worldwide is reviewed. In 1987, 53 systems were installed, taking the cumulative total to 472. The North Sea and Brazil are the most active areas, with the North Sea in the lead with 30 of the 1987 installations. Prospects for the continuation of present trends are considered.", "The paper presents an overview of the evolution of Petrobras open hole gravel packing operational practices after the 200th well has been successfully completed with this technique in Campos Basin (CB): a milestone in the history of Petrobras completion practices in deep and ultra-deepwaters. The paper also presents a comprehensive description of the main steps taken to improve our horizontal open-hole gravel packing (HOHGP) practices towards a best-in-class status in unconsolidated oil-bearing turbidites. Since the first HOHGP job done in 1988 we had to move progressively from shallow to ultra-deepwater completion scenarios. Along this path a series of innovations has been incorporated to our sand face completion practices due to the ever-growing-complexity of the wells geometry, longer intervals to be completed, heavier oil reserves to be developed, rock mechanics restraints (ever-lowering fracture gradients) and the necessity of damage-free-, high-performance-wells to cope with the skyrocketing capital expenditures which is a general rule for offshore ultra-deepwaters nowadays. Petrobras strategy conceived to continuously enhance its HOHGP completion efficiency index encompasses, the following interrelated subjects: -a comprehensive long-term plan to deal with the problem, -a multi-disciplinary teamwork approach, -a strong cooperation with gravel packing tools &amp; screens suppliers, -improvement of operational procedures and guidelines against which to measure well performance and -research &amp; investment in cutting-edge technologies. Discussions on the challenges envisioned for HOHGP operations in ultra-deepwaters in the years to come are also presented." ]

[ "The SCR (Steel Catenary Riser) was adopted by Petrobras as a cost-effective alternative for oil and gas export lines on deepwater fields, where large diameter flexible risers present technical and economic limitations. The SCR structures are subjected to several types of loads during their service life. These loads may be static or dynamic. When installed, the action of environmental phenomena like wind, current and sea waves on the floating unit, induces motions that will be transferred to the riser top connection. The random time domain dynamic analysis approach is considered to be more suitable to represent the loads and also die structural response due to the capability to represent existing non-linearities in the model. The sea-state spectra are treated by a time-simulation method, so fluid load non-linearity and fluid-structure interaction are well represented. Structural non-linearity, drag forces, fluid-structure relative velocity, and sea surface level variations are also taken into account. The fatigue damage calculation is directly related with stresses ranges composed along the whole structure service life. The load sets used in such analysis should be complete enough to represent all possible significant situations. This procedure results in a high computer time consuming necessary for several time-domain analyses, that is not compatible with a typical design schedule. Therefore, the load cases have to be reduced without lack of accuracy or safety. This paper presents the approach and methodology adopted in Petrobras to verify the SCR fatigue damage. The analysis performed and presented used the Petrobras's in-house computer codes ANFLEX and POSFAL, which were specially upgraded for this purpose." ]

[ "A349" ]

[ "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico.", "Fatigue is one of the key governing conditions in the design of rigid risers, in particular those in ultra-deep water. One effective way of improving fatigue is to adopt a lazy wave configuration, rather than a simple catenary. Steel Lazy Wave Risers (SLWR) have been successfully used offshore Brazil (Hoffman et al. 2010, Oliveira et al. 2017) and in the Gulf of Mexico (Beattie et al. 2013), and have been considered for the North Sea (Felista et al. 2015) and offshore Australia (Vijayaraghavan et al. 2015). Yet, it is probably the most computational-intensive aspect of it. Fatigue analyses require a very large number of load cases to be run, on complex, non-linear models. Methods for simplifying aspects of the analysis are highly desirable, but they must be weighed to provide the required safety levels whilst not introducing uneconomical, overconservative assumptions. The top first weld is a crucial hotspot, in particular for production SLWRs (Senra et al. 2011). These typically adopt flexible joints (FJ) at the connection to the vessel/platform, and linearization of the FJ stiffness is one of these key simplifications that bring significant value in reducing analysis cost. This paper describes a method for estimating the characteristic angle used for the linearization, which results in significant stiffness reduction in contrast with the usual, simpler method. Non-linear FJ stiffness curves are usually available, and they provide stiffness associated to the FJ absolute angle. The FJ stiffness significantly reduces with the angle of rotation. The conventional method adopts the stiffness corresponding to the most likely riser angle - absolute value measured from the static configuration. Conversely, the proposed methodology for estimating the most likely change in angle. As the angles often turn up in alternate angles, the proposed method results in much higher characteristic angle, and hence much lower FJ stiffness. The outcome is significantly less conservative designs, whilst still meeting the same required safety margins.", "This paper reports the Lessons Learned from an innovative linepipe solution that was successfully implemented on P55 Deepwater Project. The P55 field is located offshore Brazil, in the northern area of Campos Basin, in a water depth ranging from 1500m to 1900m. The scope of work consisted in engineering, procuring, fabricating and installing 16 rigid Steel Catenary Risers (SCRs), which are the first of their kind in this area. The corresponding 12-inch SCR qualification results are presented in the perspective to show the significant benefits of the technology used and its potential developments to High Pressure & High Temperature applications. In order to meet tight Hi-Lo requirements together with high fatigue performances, innovative Pipe End Design and associated automatic welding procedures were developed and qualified. The paper describes the complete sequence of pipe manufacturing process, from hot-rolling to final machining, which resulted in a concentric and reproducible pipe end geometry, ideal for limiting Stress Concentration Factors. An extensive qualification program of Full Scale Fatigue test was conducted on girth-welded strings and the associated results showed performance levels at least four times above the target curve. Moreover, Lessons Learned from the offshore campaign established that developed Pipe End Design led to significant improvements in welding times and subsequent J-laying rates. Details on how the technology effectively reduces critical times and lowers rejection rates are provided on the basis of the actual P55 offshore campaign. In addition to the advantages detailed in the paper, the presented linepipe solution proves to be also applicable to High Temperature fields, since the enhanced fatigue behavior was found to compensate a temperature derating up to 270°C. In fact, the presented manufacturing and welding technologies have opened the perspective of ongoing Developments, which are believed to bring a reliable solution for combined High Pressure and High Temperature applications.", "As part of the ultra-deepwater field development of the Santos Basin, 300km offshore the Brazilian coast, the Sapinhoa and Lula NE pioneering riser system was successfully installed by Subsea 7, acting as a contractor for Petrobras and partners (BG E&P Brasil and Repsol Sinopec Brasil, in Sapinhoa Field, BG E&P Brasil and Petrogal Brasil, in Lula NE Field). The full Engineering, Procurement, Installation and Commissioning (EPIC) project scope comprises the design, fabrication and installation of 4 buoys of 2800 tons moored 250m subsurface, of which 2 connect to the Floating Production, Storage and Offloading unit (FPSO) Cidade de Sao Paulo and 2 to the FPSO Cidade de Paraty; 27 Steel Catenary Risers (SCRs) with 3.9km each, 27 Pipeline End Terminations (PLETs) and anchorage suction piles at 2140m water depth. This Buoy Supporting Risers (BSR) system concept presents several advantages to overcome the challenges of installing SCRs on ultra-deep waters, such as, allowing decoupling between installation of risers and the production unit, reducing payload on the unit, reduced risks associated with clashes and very small dynamics transmitted from production unit to the risers, resulting in significant less fatigue issues. Due to sour and C02 service requirements for the production and water injection risers, it was decided to use mechanically lined pipe for the entire line, with the exception of the top and touch down sections, where metallurgical clad (metclad) pipe was used. Consequently, a significant amount of qualification, testing and inspection associated to welding lined and metclad pipes was required. In order to install Corrosion Resistant Alloys (CRA) lined pipes with a Reel-Lay vessel, a novel methodology for water pressurized spooling and pipelay was developed to mitigate the risk of liner damage during installation. Full-scale pressurized spooling trials were done ahead of the pipelay campaign for testing and validation of this methodology. In addition, analyses were performed to evaluate the BSR system behaviour during SCRs installation and to minimize buoy de-ballasting interventions. This paper describes the faced challenges and solutions engineered in the steel catenary risers' fabrication and installation scopes.", "Rifting and related normal stress regime in the equatorial continental margin of Brazil ceased during the Late Cretaceous, when the stress regimes in eastern South America and West Africa changed to induce strike-slip or reverse motion. In this study, we explore the postrift tectonic, geomorphic, magmatic, and sedimentary responses to stress changes using the Potiguar Basin, the easternmost basin in the equatorial margin of Brazil, as a case study. We use field and topographic data, 2D seismic reflection lines, vertical electric soundings, and geochronological and borehole data to constrain the stress evolution of the Potiguar Basin from the Late Cretaceous to the Quaternary, discussing the role of basin inversion on sedimentation and landforms. Our results indicate the presence of two strike-slip stress regimes after rifting. The first stress field (SF1) occurred from Late Cretaceous to the middle Miocene and consisted of a N-S-oriented maximum subhorizontal compression and an E-W-oriented extension. The second stress field (SF2) took place from the middle Miocene to the present day and included subhorizontal E-W to NW-SE compression combined with N-S and NE-SW subhorizontal extension. Emplacement of volcanic rocks occurred along transtensional faults, with a principal peak during SF1 at 20–30 Ma and a subordinate peak during SF2 at 5–10 Ma. In response to shortening during SF2, a 70-km-long and 50-km-wide dome formed, where marine Miocene strata were uplifted to ~250 m asl. This uplift induced the displacement of alluvial channels away from the dome. Anticlines formed by transpression along the main NE-SW-striking faults during both SF1 and ST2 acted as traps in the petroleum system. Similar shifts and stress field inversions documented in other areas of the Brazilian continental margin are consistent with the Neogene rise of the Andes and may have implications for reconstructing the tectonic history of the Equatorial Atlantic margin of South America.", "The new age of oil and gas industry is being driven by cost effective solutions, aiming to provide cheaper, faster and better products/services. The industry 4.0 brings an opportunity to transform systems and processes to be more efficient, making use of digitalization and new technologies, including the use of artificial intelligence algorithms applied to engineering problems. In Brazilian offshore fields, the operating conditions for flexible riser applications (deep-water, mean wave frequencies, floating units and corrosive fluids) make the metallic layer’s fatigue failure mode one of the drivers in its design. In a daily basis, nonlinear dynamic finite element analysis uses regular wave scatter diagrams as an equivalent way to model the wave elevation, avoiding the time consuming irregular wave representation. The analysis performed with regular waves are faster but carries conservatisms with it. In a deep-water scenario, the wave height and period ranges of the wave scatter diagram can be refined to improve the fatigue results obtained, leading to a considerable increase in the total amount of wave classes that need to be evaluated. Great part of the wave classes has a very low participation in the total fatigue damage, spending an unnecessary time to analyze them. Helped by a robust design of simulation experiment (DoSE) and machine learning regressors, a lean representation of the regular wave scatter can be done, where some of them are simulated and the rest of the results can be accurately predicted. This paper presents the application of supervised learners that are used to predict riser fatigue damage at different riser locations, given partial simulations of a regular wave scatter diagram. The techniques support the strategy to reduce the total amount of fatigue analysis required within a project design phase. The focus stays on the evaluation of the fatigue of metallic layers at two main critical regions, bend stiffener and touch down zone. Hidden patterns inside each scatter diagram are discovered, minimizing the total number of finite element analysis (FEA) required. The amount of the wave class reduction starts from 50% going up to 75%, maintaining a good level of accuracy on the predicted damage values.", "By monitoring the variation of weights of floating production units (FPUs), the sum of total weight computed by load calculators on board very often does not match the actual displacement based on the current drafts. Differences can also be observed in the trim and heel of FPUs, which present values different from zero degree in the calculations, but in fact they are frequently kept near zero by ballast control. The mooring lines and risers tensions are one of the most uncertain weight items in loading conditions reported by the crew on board, therefore, this paper aims to assess the influence and behavior of these systems to a variety of situations in which FPUs operate. Analyses were performed for semi-submersibles and FPSOs considering two configurations of mooring system: catenary and taut-leg. The purpose is to evaluate how the magnitude of the resulting force varies-and hence how the trim and heel change-for a range of offsets caused by environmental conditions. The effect of mooring lines and risers is also discussed regarding the water depth by means of case studies considering a range of water depths. Actual lines properties and seabed bathymetry from mooring system models of platforms located offshore Brazil have been taken as reference. In short, the mooring lines and risers loads will be calculated for different types of floating production units, mooring system configurations and water depths in order to evaluate their influence on the trim, heel and displacement of FPUs.", "The Exploration and Production Department of Petrobras asked the R&D Center the development of a production system for 1800 m water depth, in Campos Basin, which would allow the installation of Steel Caterany Risers (SCR) in the starboard side of a production platform. The subsurface buoy concept was chosen as one of the alternatives. This concept has being developed since the preliminary studies conducted in the first phase of JIP Deepstar. This concept has an advantage of uncoupling the movements of the platform from the risers, reducing the loads due to the risers in the platform and allowing the installation of this system before the installation of the production vessel, anticipating the production of the field. This article shows the main characteristics of the buoy, its sizes, results of structural analyses and installation procedures for a buoy which sustains 14 SCR and 5 umbilicals in one side and 14 flexible jumpers and the same 5 umblicals in the opposite side. This concept was tested in two model test tanks, where it was verified that this concept is feasible. Also, information related to a field trial with a prototype installed in Brazilian waters will be presented.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost." ]

[ "Improved sustainability performance in increasingly complex business environments is a challenging task for organizations operating in many different industries. In the offshore oil and gas industry, the use of potentially hazardous materials and operation under progressively hostile environments increases the risk of major accidents. Regulators have been trying to catch up on the design of regulatory frameworks that prevent these types of events, aiming to protect people, assets, and the environment. Although there are some recommended practices that companies have been using as the basis for their process safety management systems (PSMS), lack of uniformity and inefficient enforcement remain as two fundamental problems. This paper explores these two problems and takes some first steps toward a broader discussion about these important issues. We draw from the literature on sustainable operations to develop a descriptive case study of the offshore oil and gas industry by employing document analysis and an analysis of the Health, Safety and Environment Management System (HSEMS) of Petrobras, a world leader energy company. By employing multiple primary and secondary data collection strategies, including a number of formal expert interviews, we map, explore and compare major recommended practices for PSMS, identify a series of gaps in policy and practice, and offer a number of recommendations and implications for practice, policy, and research." ]

[ "A921" ]

[ "The offshore O&G production has been increasing considerably in the last five years. Therefore, to guarantee the safety of their operations, the O&G companies are being pushed by regulators agencies to establish a robust and efficient safety management system, particularly in Brazil, where the Petroleum National Agency published, in 2015, the SGSS (Technical Regulation of the Subsea Systems Operational Safety Management System). The new regulation forced Brazilian Operators, such as Petrobras, to promote a couple of initiatives, in order to increase the safety of their offshore operations. One of these initiatives has its focus into eliminate or minimize the risks in operational phase, maximizing the potential to avoid them during engineering design phase, where the ability to influence safety is higher than another project phase. One of the challenges of this approach is related to the fact that, in general, and regarding operational safety, the engineering design works in a passive way, in other words, the safety improvements in the new projects only are applied if a strong operational safety issues feedback process is established. Operators have been noted that this operational feedback to design engineers is not the only way to achieve a high level of safety in their operations and facilities. There is a consensus that the engineering design shall work in an active way, being more predictive than corrective, in order to avoid operational issues. The objective of this paper is present a new approach regarding the operational safety focused on engineering design phase, establishing new process, methodologies, actions and closing the gaps between design and operational teams to enhance operational safety.", "With the expansion of oil exploration in deep waters, assessing the risks associated with offloading operations becomes essential in preventing accidents that may cause huge environmental disasters. In this paper, the system that composed of a turret-moored floating production storage and offloading (FPSO) connected to a conventional shuttle tanker, which is assisted by a tug boat to maintain its position during an offloading operation, will be studied. Using environmental data collected over a period of 6 years, from 2004 to 2009, from the Campos Basin in Brazil, the equilibrium positions of the system were calculated, considering its constraints (operational criteria defined by Petrobras) and verifying the stability of those equilibrium points. The hydrodynamic and aerodynamic static forces were calculated using models validated in the literature. Dynamic effects and oscillations are taken into account by adding safety margins to the operational sectors. With this analysis, we calculated the FPSO heading probabilities during an offloading operation and the expected downtime of operation in Campos Basin. We concluded that the downtime of the offloading operation with a conventional shuttle tanker is close to that with a dynamic positioned (DP) shuttle tanker (10% downtime). Furthermore, the results from the stability analysis were used to generate a simplified set of rules to classify the environmental conditions into four classes of operational risk by applying an unbiased decision tree. This method obtains practical rules based on measurements of wind, wave, and current, allowing the operator to quickly evaluate the risk level before starting the operation.", "In the early years of the offshore industry, Early Production Systems or EPSs were extensively utilized to develop marginal and/or complex reservoirs in progressively deeper and more remote waters. Their signature attributes were low capital and operating costs, simple designs and accelerated schedules to first oil. Today, Operators are emphasizing capital efficiency, design simplicity, compressed discovery to first oil cycle times and de-risking subsurface uncertainty as deepwater projects compete for capital allocation with onshore shale projects. Discussing history and applications, the authors show, how an EPS can enable an Operator to sanction developments of marginal reservoirs, mid-size reservoirs with expansion capabilities to capture reservoir upsides and phased developments of giant reservoirs. This paper addresses major subsurface uncertainties impacting development decisions and strategies to gather relevant dynamic information to mitigate risk. It provides a brief history of EPSs deployed in the North Sea, Brazil and GoM including a database of EPS platforms based on an extensive literature review. A case history in each region to demonstrate the utility of an EPS to derisk and enable commercial production of marginal, mid-size and large fields. A discussion is presented for EPS platform selection based on the research of platforms deployed in the three major deepwater regions. This discussion will facilitate to develop a roadmap for the Operators and Development Planners with tools to rapidly deselect or retain options in the early development planning stage while there is a high degree of reservoir uncertainty and pressure to compress cycle time to first oil following a discovery.", "Since the first World Ocean Assessment (United Nations, 2017a), the offshore oil and gas sector has continued to expand globally, in particular in deep and ultradeep waters. The use of tension leg platforms, spars and floating production, storage and offloading (FPSO) systems are key to such expansion. In the next decade, frontier regions such as the eastern Mediterranean, the east coast of South America (Brazil and Guyana), and the west coast of Africa could be the major growth drivers for offshore oil and gas exploration and production. There is an upward trend in decommissioning activity, in particular in mature regions, such as the North Sea and the Gulf of Mexico. Exploration and production practices continue to evolve to minimize potential impacts on the surrounding environment. The creation of regulatory capacity to manage offshore resources effectively, especially in frontier regions, requires significant commitment and long-term institutional investment. Technological innovation and sophisticated industrial capability built over decades by the offshore oil and gas sector are benefiting the emergence of the marine renewable energy (MRE) industry. A major thrust to the offshore hydrocarbon sector since the first Assessment is technological advancement in analysing offshore exploration and production data to enhance operational and financial efficiencies.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Significant volumes of heavy and high viscosity oil have been discovered in the Campos and Santos Basins, offshore Brazil, and its economical production is a challenge for the oil industry. New production technologies are required for the economic development of offshore heavy oil reservoirs. Long horizontal or multilateral wells, produced with high power ESPs, hydraulic pumps or submarine multiphase pumps, could partially compensate the decrease in productivity caused by the high oil viscosity. The flow assurance could be improved with insulated or heated flowlines or, alternatively, with the use of water as the continuous phase. The heavy oil processing in a Floating Production Unit is not straightforward, and new separation technologies, as well as the feasibility of the heavy oil transportation with emulsified water, should be investigated. The existence of light oil reserves in neighboring reservoirs, even in small volumes, would be an important issue for the commercial feasibility of the heavy oil area. The Petrobras experience with offshore heavy oil fields in the Campos Basin shows that some can be economically produced. However, the economic feasibility is controlled by factors such as: reservoir characteristics; water depth; possibility of blend with light oil; oil acidity and contaminants; price scenario; fiscal regime; availability of new production technologies; transportation, refining and marketability of the heavy oil. The recently created Petrobras Heavy Oil Technological Program - PROPES - is in charge of the development, together with universities, service companies and the industry, of new technologies for the offshore heavy oil fields. The main objective of all this work is to set the basis for the economical development of the significant volumes of heavy oil already discovered offshore Brazil. This paper presents the main research and development topics of the Petrobras Heavy Oil Program, as well as the key production technologies for the target fields. Additionally, the results of some well tests and Extended Well Tests (EWT) in heavy oil reservoirs in the Campos Basin are presented and discussed.", "In a scenario of huge investments in the quest for new oil and natural gas discoveries, the oil industry has reached a consensus: no easy fields to be developed remain undiscovered, especially in offshore environments. New and old challenges on well drilling such as drilled extensions over 6000 m, sub-salt drilling, very narrow operational windows, operational problems like lost of circulation, stuck pipe, and kicks are aggravated when drilling in high pressure and high temperature (HPHT) environments. In the world's exploratory context, the occurrence of HPHT areas is an increasing trend. It is the materialization of the worst case scenario for well drilling and safety, formed by great challenges and operational, environmental, and economic risks. Field experience has shown that the economical risks have been overshadowed by the great premium target: increments on reserves. However, if the well safety aspect is dealt with the conventional approach, the oil industry is at risk of losing its investments, causing great impacts to the environment and also to the company's image. Since HPHT well construction costs are so much higher than those of traditional wells, the scope of knowledge and science on well safety, once limited to kick prevention and well control contingencies, are now an integral part of the technical and economic feasibility of well construction. Within this context, this work surveys the best HPHT techniques and procedures practiced by the oil industry, presents the new researches and trends and shares some valuable lessons learned on Petrobras' operations in Brazil and throughout the world.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "Mega oil and gas reservoirs have been discovered in deep and ultra-deep offshore Brazil. These Pre-Salt discoveries are remotely located at water depths ranging from 2200m (~7,200 ft) to 2600 m (~8,500 ft). Offshore Brazil has unique metocean conditions with long swell periods which present challenges on floating platforms such as Spars and Semis. In addition, the remoteness of location and the associated high cost of vessel mobilization add further pressure on economics and risk. Quayside integration is thus a desired feature of the hull concept in order to eliminate offshore mating and the associated risk to cost and schedule. To explore these pre-salt complicated ultra-deepwater reservoirs usually require large drilling rig and drilling variable payload which result in very large topsides in both size and weight. Spars and TLPs are the only two proven dry tree hull forms in deep and ultra-deep waters in the GOM. However the TLP becomes cost prohibitive if the water depth is beyond 1,524 m (5,000 ft). For large payload systems requiring a large drilling rig, a suitable Spar size creates a challenge for transportation and installation. The semi-submersible hull form is known to offer advantages over Spars such as larger deck space and quayside integration which are essential to reducing offshore commissioning time and risk as well as cost and schedule. Maturation of the dry tree semi-submersible solution in GoM ultra-deepwater (2,400m) had been undertaken by RPSEA and dry tree Paired Column Semisubmersible (PC Semi) platform, developed by Houston Offshore Engineering, was selected by the RPSEA committee in 2009. Extensive wind tunnel tests and wave basin model tests including 1,000-year central GoM hurricanes were successfully completed in 2010. PC Semi hull configuration, TTR stroke, the analytical results and simulation tools had been fully validated. This paper presents validation analysis results of a dry tree PC semi developed with conventional RAM style tensioners, in 2,400m ultra-deepwater of Offshore Brazil Pre-Salt carrying same topsides payloads as RPSEA. The validation analysis was performed by the correlated analysis tools and established analysis procedures. The design efficiencies including payload, steel weight and production efficiencies of PC Semis for BPS and central GoM are addressed and discussed. Highly efficient PC Semi for BPS has been developed, validated and became \"market ready\".", "Atlanta is a post-salt oil field located offshore Brazil in the Santos Basin, 185 km southeast of Rio de Janeiro. The combination of ultra-deepwater (1,550 m) and heavy and viscous oil (14° API and 228 cP at reservoir conditions) composes a unique challenging scenario for Electrical Submersible Pump (ESP) application. The paper discusses the performance of the ESP system utilizing field data and software simulations. The in-well ESP is the main production method and mudline ESP boosting is the backup one. Both concepts proved to be effective artificial lift solutions for the harsh flowing conditions. The in-well ESP is installed inside a capsule in a close to horizontal slant section of around 70 m. The mudline ESP boosting is readily available to become the main production method in case the in-well ESP fails. This paper discusses the challenges and solutions that proved to be successful after more than 18 months of continuous production. Software simulations and continuous production monitoring were key factors for system modeling and optimization. One of the most powerful ESPs installed inside a well worldwide to produce heavy and viscous oil from an unconsolidated reservoir represents a step forward in ultra-deepwater production system boundaries. The concept of having the mudline system as backup is also an innovative step for the offshore oil and gas industry. Two production periods are presented with very distinct and unusual characteristics: (i) one producing 12,500 bpd of a high viscous, high Gas Void Fraction (GVF), low inlet pressure and temperature crude through two mudline ESP boosting systems and (ii) another one producing 30,000 bpd through three inwell ESPs." ]

[ "This paper will describe the improvement made to the reamer cutter blocks to enhance its durability and optimize the Pre-salt Well Construction Currently, most of the Brazilian's Pre-Salt wells have the last phase built-in 12.25in. In some situations, it is necessary to drill oil wells in a giant offshore field wells with five phases, enlarging the third phase from 18.125in to 22in. The high abrasiveness encountered at this phase increased the number of runs needed to drill it and, consequently, time and costs that encouraged the development of solutions. This work relates what has been observed during the last years about reaming difficulties, specifically, in the enlargement from 18.125in to 22in when facing abrasive formations. Petrobras specialists analyzed these events and concluded the matrix of the reamer's cutter blocks was wearing faster and losing the capacity to hold the PDC cutters. The hole enlargement company, that Petrobras works for nowadays, developed a process that increased the resistance of the cutter blocks by increasing the hardness of the surface material prior to the brazing of the cutters. Then, Petrobras has had the opportunity to use both modified and common cutter blocks in a challenging operation to compare their durability and the results were completely satisfactory. The modified cutter blocks had much less wearing on the same formations. Based on this operation, we can conclude this process is validated since improved the reamer cutter blocks quality and its lifetime. This paper can serve as a guide to reduce operations costs and to optimize well construction when there are concrete possibilities to enlarge abrasive formations." ]

[ "A1820" ]

[ "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "Drilling operations in salt zones have gained importance in Brazil due to the discovery of large oil and gas reserves in the Pre-Salt area. Thus, the pursuit of excellence in such operations is requiring considerable development of new operational practices and technologies. Synthetic base mud has been the first choice to drill through evaporite sections in Pre-Salt zones. Synthetic fluids application practically eliminates salt dissolution and improves caliper quality. However, depending on the salt mobility rate, stuck bit and/or stuck pipe can happen, demanding the injection of fresh water pills for its liberation. In some wells, the frequent use of those pills resulted in enlarged sections. The situation gets worse in scenarios where loss of circulation is a major issue. On the other hand, the use of non-saturated aqueous fluids to drill soluble salts (e.g. halite, tachyhydrite and carnalite) can result in localized enlargements due to leaching process. Drilling a gauge hole is a very important issue to prevent wellbore collapse and/or problems in cementing operations. However, high operating costs associated to deep water drilling is placing additional emphasis on drilling performance in order to reduce the operational time, without losing the quality of the wells. This concern raises the issues of how to most effectively improve operational performance regarding the drilling fluid selection. The paper presents the results of the use of water based muds in the drilling of two offshore wells in Brazilian Pre-Salt area and highlights the lessons learned from the experience. Before the field application extensive lab tests and numerical simulations were carried out to support the drilling fluid design for the wells. In the first well, differences between the planned and encountered drilling conditions led to fluid replacement during the operation. On the other hand, in the second well, 2.000 m salt extension was successfully drilled to depth with no major operational problems and good drilling performance. The field application of WBM proved to be a good option to drill the salt layers in the development of Pre-Salt fields but it demands a more detailed knowledge of both lithology and stratigraphy of the evaporite section.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Located in the Brazilian continental shelf, the so called \"Pre-Salt\" reservoirs with large accumulations of excellent quality, high commercial value light oil have become the most strategic oil production site for Brazil. One of the main challenges that has recently arisen concerns the definition of an adequate process to address the high concentration of carbon dioxide (CO2) presented in their geological formations. For the Pre-Salt basin, several options of offshore carbon dioxide storage have been studied, such as: aquifers, depleted reservoirs, and salt caverns. Although a mined offshore salt cavern has never been constructed, its adoption has been gaining momentum due to the mantle origin of CO2, the thickness of rock layer above the salt layer, and the lack of reservoirs below the carbonate reservoirs capable to store gases. Because of its unprecedent characteristics, the development of such facility implies a series of challenges in terms of safety and integrity aspects. Using tailored qualitative risk management tools, this paper explores the many aspects and interdependencies of well design, well clustering configuration, drilling, solution mining, CO2 disposal, and abandonment phases related to offshore salt caverns. The results obtained so far indicated that, technically, they are a feasible solution for Pre-Salt CO2 storage. However, economic and environmental viability strongly depends on well clustering configuration and solution mining process.", "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns." ]

[ "The discovery and production, by Petrobras, of over 50 billion barrels in place of pre-salt oil in Brazil's offshore South Atlantic Santos and Campos basins has drawn worldwide attention to its km-thick Cretaceous salt seal since 2007. However, the depth of the pre-salt reservoir in these basins make prohibitive the costs of continuous coring or even extensive logging of the salt. The salt seal of the Santos and Campos basins forms part of the Cretaceous South Atlantic salt giant, the largest in the world, now divided between Brazil and southwestern Africa. Although our petrographic study is concentrated north of the Santos and Campos basins, we nevertheless discuss the age, facies, tectonic-paleogeographic controls and evolution of the entire Brazilian salt giant. Offshore Brazil, salt extends for 2.200 km from the Sergipe Basin in the northeast to the Santos Basin in the southwest. The Sergipe Basin at its NE end displays the full spectrum of evaporite cycles, spanning from carbonates, anhydrites and halites to the highly soluble hydrated Mg-chlorides carnallite, bischoffite and tachyhydrite, as does the Santos Basin in the SW part of the salt giant. The deposition of Mg-chlorides was terminated in Sergipe by an intra-salt unconformity at the carnallite/sylvinite contact, dated as 110.64 ± 0.34 Ma. In the intervening Espírito Santo and Campos basins, these highly soluble salts have not yet been found. Onshore Sergipe and Espírito Santo basins the entire salt sequence has been cored in several wells, including the highly soluble Mg–K–Ca chlorides. Here, we analyze the petrography and chemistry of cores in Sergipe and Espírito Santo. We prove the presence of tachyhydrite beds at both ends of the salt giant, in the Sergipe and Santos basins, but, at least for the time being, not in between the two basins. By comparing the presence of tachyhydrite beds in Brazil with similar evaporite sequences of similar age in Thailand, we defend that the high Ca/Mg and Ca/SO4 ratios in Cretaceous seawater was the de facto cause for tachyhydrite deposition in both regions. Ca/Mg and Ca/SO4 ratios of global seawater were raised by hydrothermal activity over basalts produced at exceptionally high rates in the Aptian along new mid-oceanic ridges and in oceanic plateaus such as Ontong-Java. The heat loss caused by this exceptionally high igneous activity may have been instrumental to the change of the thermochemical conditions across the core-mantle boundary that stabilized the Cretaceous Normal Superchron for nearly 40 Ma, from 123.4 to 121.2 Ma (2?) to 83.07 ± 0.15 Ma (2?) Ma. Aptian volcanic activity in the South Atlantic formed the Rio Grande Rise - Walvis Ridge that was the southern barrier of the salt basin, lava flows on the São Paulo Plateau, and basalts along the developing South Atlantic Ridge. Evaporite facies reflect cyclic changes on all scales when concentrating the depositing brines. We therefore analyze the effect of increases in brine concentration on the formation of salt crystals throughout multiple depositional cycles. In the later stages of the Brazilian salt basins, increased inflow of seawater from the Central Atlantic Ocean along the Equatorial pull-apart rift basins enlarged and deepened the existent brine lake while its salinity, and especially its Ca and Mg contents, dropped. Flooding by this less concentrated brine created an unconformity, leaching Mg and Ca from the carnallite and tachyhydrite previously deposited, and replacing them with secondary sylvinite. Our results can be applied to the essentially uncored salt sequence of the Campos and Santos basins, where igneous and hydrothermal activity provided additional sources of calcium. The Ca excess may have been increased still further by serpentinization of lithospheric mantle beneath hyperextended crust and by percolation of seawater through mafic rocks of the proto-Rio Grande Rise – Walvis Ridge that formed the southern barrier of the salt basin." ]

[ "A513" ]

[ "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "Based on a vast set of in situ data, a first comprehensive overview of the oceanographic characteristics of Baía de Todos os Santos (BTS) is provided. BTS is the second largest coastal bay in Brazil (maximum area of 1223 km2 and average depth of 9,8 m), and is located in the northeast Brazil, In the vicinity of Salvador city. The circulation inside the bay is mostly tidally driven and does not vary significantly throughout the year. On the other hand, the wet (winter) and dry (summer) seasons does alter significantly the distribution of water properties inside the BTS. During summer, the waters Inside the bay have oceanic characteristics, with Tropical Water (TW) penetrating along the whole region, except for the mouth of Rio Paraguaçu, The water temperature inside the bay is higher than in the coastal zone, and variations can be up to 3°C, reaching a maximum of nearly 30°C, During winter, with the increase of freshwater Inflow, salinity variations of about 4 are observed between the innermost stations Inside BTS and the adjacent coastal region, Salinity values inside the bay can be as low as 32.3, inhibiting the penetration of TW into the BTS, which Is totally occupied by a locally formed Coastal Water (CW). An evaluation of the flushing time is also provided and shows that during summer, a 60-fold increase can be observed compared to winter (38 days). While the circulation does not vary seasonally Inside the bay, the associated inner shelf is characterized by two different scenarios. During summer, the upwelling favorable easterlies drive a southwestward flow, while during winter the more frequent occurrence of cold fronts (southerly winds) tend to reverse the circulation.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "We present new evidence for the existence of a large pockmark field on the continental slope of the Santos Basin, offshore southeast Brazil. A recent high-resolution multibeam bathymetric survey revealed 984 pockmarks across a smooth seabed at water depths of 300–700 m. Four patterns of pockmark arrays were identified in the data: linear, network, concentric, and radial. Interpretation of Two-dimensional multi-channel seismic reflection profiles that crosscut the surveyed area shows numerous salt diapirs in various stages of development (e.g. salt domes, walls, and anticlines). Some diapirs were exposed on the seafloor, whereas the tops of others (diapir heads) were situated several hundreds of meters below the surface. Extensional faults typically cap these diapirs and reach shallow depths beneath the seafloor. Our analysis suggests that these pockmark patterns are linked to stages in the development of underlying diapirs and their related faults. The latter may extend above salt walls, take the form of polygonal extensional faults along higher-level salt anticlines, or concentric faults above diapir heads that reach close to the seafloor. Seismic data also revealed buried pockmark fields that had repeatedly developed since the Middle Miocene. The close spatio-temporal connection between pockmark and diapir distribution identified here suggests that the pockmark field extends further across the Campos and Espírito Santo Basins, offshore Brazil. Spatial overlap between the pockmark field topping a large diapir field and a proliferous hydrocarbon basin is believed to have facilitated the escape of fluid/gas from the subsurface to the water column, which was enhanced by halokinesis. This provides a possible control on fossil gas contribution to the marine system over geological time.", "This paper summarizes the geologic knowledge of the Foz do Amazonas basin in Northern Brazil, which has been investigated by Petrobras through geophysics and exploratory drilling. The basin covers an area of about 200,000 km 2 , including the present coastal zone, continental shelf, and Amazon submarine fan. This potentially prospective basin has been filled from Albian to Recent; may contain 14 km of sediments along the present-day shelf edge; and consists of a central deep basin flanked by two marginal platforms. The basin has passed through three tectonic stages since its beginning in the Albian; its main structural trends are related to fracture zones and ridges of the equatorial Atlantic Ocean.", "Many sedimentary basins host thick evaporite (salt) deposits. Some of these basins also host extensive igneous intrusion networks. It thus seems inevitable that, in some locations, magma will interact with salt. Yet how interaction between these materials may influence salt tectonics or magma emplacement, particularly at the basin-scale, remains poorly understood. We use 3D seismic reflection data from the Santos Basin, offshore Brazil to image 38 igneous intrusions spatially related to thick Aptian salt. Based on identified seismic–stratigraphic relationships, we suggest sill emplacement likely occurred during the late Albian-to-Santonian. We show intra-salt sills are geometrically similar to but laterally offset from supra-salt sills. We suggest ascending magma was arrested by the salt in some areas, but not others, perhaps due to differences in evaporite lithology. Our mapping also reveals most sills occur within and above the presalt Merluza Graben, an area characterized by Albian-to-Neogene, salt-detached extension. In adjacent areas, where there are few intrusions, salt deformation was driven by post-Santonian diapir rise. We suggest emplacement of hot magma within evaporites above the Merluza Graben enhanced Albian-to-Santonian salt movement, but that crystallization of the intrusion network restricted post-Santonian diapirism. Our work indicates salt–magma interaction can influence salt tectonics, as well as the distribution of magma plumbing systems, and thus could impact basin evolution.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "Santos Basin Pre-Salt Cluster, Deepwater Southeast Brazil, is a unique scenario due to the heterogeneous nature of its microbial carbonate reservoir, underlain by 2,000 m salt layer and distant 300 km from the coast. Other characteristics for development are the variable CO2 content and compositional grading with depth of the reservoir fluids, flow assurance issues and special demands concerning subsea engineering, well construction and processing plant. Recognizing reservoir and development uncertainties, Petrobras and its partners have opted for a staged development, based on intensive information gathering, extended well tests (EWTs), multi well production pilots and definitive systems prioritizing the standardization of well projects and production systems. This strategy aimed both accelerated cash flow and dynamic characterization of the reservoir behaviour, subsea gathering system and the processing of fluids in production units. Long term recovery was not forgotten as flexibility was planned for different recovery mechanism as water, gas and water alternating gas (WAG) injection. This paper presents an overview of the main drivers and concepts which served as basis for the development of the prolific pre-salt fields. Pre-salt mega-projects management was early identified as especially challenging: it should assure that the main uncertainties were known and mitigated at project sanction, as well pursuing strategies for CAPEX reduction, on-time long lead items delivery and local content accomplishment, among others. Integration of disciplines and the flexibility were paramount to achieve these goals. The first results are on stream: after only eight years from discovery, production in the Santos Pre-Salt Cluster reached, in February, 2014, 240,000 bopd. This production comes from ten producers; water and gas injection are also being performed. Considering the whole pre-salt reservoirs offshore Brazil, production is over 400,000 bopd. The lessons learned are being considered to optimize the next generation of production systems. Three FPSOs are operating in the Santos Pre-Salt, two additional FPSOs will be installed in 2014, and 8 more until 2016. An oil flow rate of more than 1 million bopd, operated by Petrobras, is expected for 2017.", "The Campos Basin (100,000 km2) is located on the continental shelf of southeastern Brazil. Despite the significant oil and gas industrial activities underway in the Campos Basin, scarce information is available regarding the hydrocarbon contents and microbial communities in the deep-sea sediments. To gain new insights on these aspects, we first obtained deep-sea sediment samples with different degrees of oil exposure. We obtained samples from a seabed fissure (N = 28), surroundings (250 m to 500 m from the fissure; N = 24), and a control area (N = 4). We used shotgun metagenomics to characterize the taxonomic and metabolic diversity and analyzed biogeochemical parameters (metal and oil concentration) of all samples. The high levels of unresolved complex mixture of hydrocarbons in the fissure indicate a potentially recent petrogenic contribution in these sediments. The fissure area was found to have a higher abundance of hydrocarbonoclastic bacterial genera and hydrocarbon degradation genes. These bacteria may be used as biosensors of sediment contamination. The effects of oil contamination, mainly around the fissure, are less clear at 250 m and 500 m, suggesting that the surroundings may not have been heavily affected by the oil leakage. Our study demonstrates that metagenomics can disclose biosensors for environmental monitoring." ]

[ "Sevan Marine has let a contract to a unit of John Wood Group plc for the operation and management of the Sevan Stabilized Platform (SSP) Piranema, a floating production, storage, and offloading (FPSO) vessel. The FPSO will be operated for Petrobras in Piranema oil field off northeastern Brazil. The vessel will be the first implementation worldwide of Sevan Marine's SSP cylindrical monohull design. Piranema's design includes 30,000 bpd of oil process plant capacity, a gas injection plant with 3.6 million cu m/day of compression capacity, and 300,000 bbl of oil storage capacity. Piranema also can accommodate as many as 21 risers." ]

[ "A1064" ]

[ "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "Guara BV, an affiliate of Petrobras, has signed a letter of intent to charter a floating production, storage, and offloading vessel for use on Block BM-S-9 in the Santos basin offshore Brazil. The platform will have a processing capacity of ~ 100,000 bpd of oil and 5 million cu m/day of natural gas. The FPSO will be provided and operated by Modec Inc and Schahin Petroleo e Gas SA for the BM-S-9 consortium for a 20-yr period. Delivery is expected in June 2016, and production is expected to begin 2 mo after the delivery. The consortium is planning to connect at least 8 wells, 4 as producing wells and 4 for injection, to the vessel from the presalt layer in the Carioca area.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Built in China for 2006 startup, the SSP30 FPSO offshore platform is the first circular platform built in the world. It has been sent to Brazil to operate in the Piranema field, 37 km from the city of Aracaju, Sergipe state, northeastern Brazil. It can extract up to 30,000 bbl/day of 43-44 degree API light crude oil and can store 300,000 bbl. It will operate in 1,000-1,600 m of water. The circular geometry, known as mono-column, has a double casing. It was developed by the Centro de Investigaciones y Desarrollo de Petrobras (Cenpes) within an Agreement of Technological Cooperation. This agreement searches for alternatives in the development of double hull projects for larger platforms for its various projects in Brazil and elsewhere. The advantage of this structure is the flexibility that its operation affords. It can be withdrawn and used on other small fields and used to make tests of long duration. The platforms of low transport charges, like the SSP300, are a good option to reduce the cost of development of small accumulations of crude oil in deep water. The double hull was built at the Yantai-Raffles shipyard in China, then transported to The Netherlands, where a processing and production plant for crude oil and gas was installed. This FPSO belongs to the Norwegian company Sevan Production AS. The FPSO is expected to reach Brazil at the end of October 2006 and in 2007 to connect to six wells of maximum 1,450 m depth. The Piranema project is strategic to Petrobras to increase production of Brazilian light crude oil as an objective of the company business plan to create a primary pole of production in deep water in the Brazilian northeast. To develop the Aracaju field will require $(US)/750 million. Thanks to its new field of exploration, Brazil saves about 2 million bbl/yr of light crude oil that otherwise would have to be imported.", "In the deep waters off Brazil, Petrobras and Frontier Drilling do Brasil have carried out early production of heavy crude since October 2002 at Jubarte field, offshore Espirito Santo state. The Seillean, a dynamically positioned vessel on contract to Petrobras, was used as the floating production storage and offloading (FPSO) vessel. To prepare for production, the development team needed to evaluate the requirements for an FPSO vessel and develop the limits required by the processing system. Petrobras chose the Seillean as the central vessel in the life-of-field production system. FPSO equipped for test and early production operations in ? 2000-m water depth. The FPSO is self-contained with a full-size derrick to handle the rigid production riser and subsea equipment. Produced crude is offloaded to a shuttle tanker with a flexible floating hose connected between the two vessels. A DP Class 1 shuttle tanker is required in Brazilian waters for export of crude for operations in environments with significant wave heights ? 5.5 m. A mooring hawser connects the DP FPSO and the DP shuttle tanker, allowing a flexible, floating hose system to offload crude to a shuttle tanker. Before the Seillean could start Jubarte production, several upgrades were required to the vessel. The crude oil heaters and coolers onboard the FPSO needed augmentation. The FPSO's cargo tanks were not fitted with heating coils, yet offloading to a shuttle tanker occurred every 10-14 days. This created a concern about long-term heat loss and crude transportability.", "In 2018, Brazil announced the designation of two new Large Scale Marine Protected Areas (LSMPAs), resulting in an increase in protection from 1.5% to 26.36% of the country’s maritime territory. We employ an agenda-setting theory to analyze the Brazilian LSMPAs as a causal case study, unpacking the factors that led to their creation, and providing insights about the process of reaching global targets. Drawing on a detailed literature analysis and interviews with key stakeholders, we argue that reaching an international goal is a political commitment which emerges within a ‘policy window.’ Additionally, we offer seven lessons that can improve the chances of reaching an international goal and shifting the agenda: (1) attract media attention; (2) make a formal commitment; (3) launch a movement or a campaign to attain the goal; (4) make the goals legally binding; (5) propose general international goals; (6) diffuse ideas and (7) form support groups.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina." ]

[ "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008." ]

[ "A957" ]

[ "In 2004, after a cycle of 11 yr in which the annual increase in crude oil production was 8.6% avg, the production decreased 3%, according to Petrobras. In 2003, the production was 1.54 million bpd avg. The decline in production was due to delays in construction and the arrival of two Floating Production Storage Offloading vessels, the P-43 and P-48. The P-43 began to process crude oil on 12/22/2004. When the P-48 enters service, Petrobras will be able to increase its production of crude oil by 500,000 bpd. The P-43 is stationed in the Barracuda field, bay of Campos, offshore the state of Rio de Janeiro, in 800 m of water. Initial oil yield is 10,380 bpd of 25° gravity. Platform P-48, the twin of P-43, is part of the Barracuda-Caratinga project that will increase Petrobras crude oil production by 300,000 bpd. This platform will enter service in January 2005. With the new capacity, the production of crude oil by Petrobras is expected to reach 1.9 million bpd by the end of 2005. Other floating installations will contribute as well when they enter service, the P-50 and P-34. Petrobras is to invest $26,200 million until 2010 for E&P. Between 2005 and 2008, 17 installations will enter service allowing annual increases of 5.9% in production of crude oil and NGL, achieving self sufficiency in 2006. Petrobras has invested heavily in improved recovery that in the last 10 yr in the Marlim oilfield has yielded an additional increment of 3000 million bbl of crude oil. In November 2004 Petrobras gave a $47 million contract to the Western Geco company to make a three dimensional seismic study of the Marlim basin to identify reserves there. Discovery of an additional 290 million bbl of crude oil in Marlim is expected. On dry land, improved recovery enabled an increment of 200,000 bpd in production from the fields in the states of Bahia, Rio Grande do Norte, and Sergipe in 2004. In 2006-2007, the company expects to substitute for imports of light crude oil its own production to start in the oilfield offshore the state of Espírito Santo. This is lighter crude oil than that from the bay of Campos where the company now obtains 80% of its oil production. The Brazilian oilfields produce mainly heavy crude oil that has to be mixed with lighter imported crude oil to produce quality gasoline. However, Brazil increases its exports of heavy crude oil. The company is involved in new areas of exploration. They are discussed. The Brazilian Petroleum Authority, Agencia Nacional de Petroleo, will likely hold the 7th hydrocarbon licensing round for concessions in crude oil E&P in October 2005.", "Petrobras produced 1.98 million boe/day in January 2004, 1.9% less than in January 2003 and 1.4% less than in December 2003. Domestic output of 1.73 million boe/day was down by 1.3% on December 2003 because of outages on the P-40 platform at the Marlim Sul field, as well as on four wells in the Marlim and Voador fields. Domestic crude output was 1.47 million bpd in January, 1.7% less than December. Offshore output accounted for 1.22 million bpd and onshore 250,000 bpd. Domestic gas output was 40.8 million cu m/day, of which 21.3 million cu m/day was produced offshore and 19.5 million cu m/day onshore. Foreign oil output amounted to 165,000 bpd, of which 153,000 bpd was from onshore wells and the rest offshore.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "The objective of this paper is to present how Petrobras is successfully managing production losses due to mineral scale formation in subsea production wells from its biggest offshore field1. Marlim Field, discovered in 1985 with a STOIIP estimated at 1,012 million STD m3 (6,369 million STB) and a field area of 146 km2 is located in water depths ranging from 600 m to 1100 m.Current Marlim Field production, around 446,754 bpd is supported by injecting 761,971 bpd of sea water. The water production is 217,150 bpd (water cut = 32%) and GOR is 82 STDm3/STDm3. A total of 117 wells are on operation, with 73 producers and 44 water injectors. The field was developed using subsea completion through the vertical, deviated and horizontal wells, equipped with cased hole and open hole gravel packed screens. Scale formation has occurred as a consequence of the incompatibility between the barium and strontium present in formation water and the high amount of sulfate in the injected seawater. To avoid production losses a plan of water management was implemented, including frequent produced water chemical analyses to investigate the convenience for applying a chemical bullhead treatment to remove scale in the production wells (tubing, screen, gravel pack and near well bore)2,3,4. This paper presents results from dissolver treatments performed in the field and also from a special investigation using a rig in a horizontal well. Valuable information was obtained in this intervention, clearing up the scaling occurrence phenomena in this scenario, allowing therefore an improvement on productivity recovery of the wells.", "With the prospect of about 200,000 bpd of crude oil productions from offshore fields operated by Petrobras being added to output in 2005, Brazil should be very close to self-sufficiency by the end of the year. Delays to the completion of three large platforms, which have now taken up stations at fields in the Campos Basin, coupled with declining production at several other aging fields at Campos and elsewhere, meant that an average of 50,000 bpd less was produced in 2004 than in 2003. The reduction occurred during a year when, after remaining static for 3 yr, demand increased by 3.5% to average 1.76 million bpd in 2004. as a result, the company had to import 173 million bbl of crude in 2004. The imported products, mainly diesel, naphtha, and LPG, cost about $10 more per barrel in 2004 than they had in 2003. A discussion covers impact of product prices; gas production; political matters; and newbuild vessels.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "Brazil's oil development continues its remarkable progress; latest figures show crude oil output averaged 160,000 bpd, strong 8% increase over 1967; largest producer became Miranga field, discovered only in 1965 (see Engineering Index 1967 p 1699), where 120 wells have been drilled, and average total output amounted to 39,000 bpd; extensive drilling program has contributed to proven reserves of Petrobras, calculated at end of 1967 at 800 million bbl and 24. 5 billion cu m or around 850 billion cu ft of gas; offshore development is considered most promising, as sedimentary section of about 6000 m thickness has been indicated by previous geophysical and seismic surveys on Continental Shelf.", "Petrobras launched the PDBC (Campos Basin Development Plan) as part of Company's Strategic Plan to increase production and incorporate reserves in a scenario of mature fields and low oil prices. The plan is based on an integrated analysis of opportunities, combining skills of professionals with different backgrounds, allowing cost reduction and the deployment of technical solutions. It also has defined shortand long-term actions to achieve these goals. In the short-term horizon, actions included campaigns to remove damage of producer and injector wells, improvements in artificial lift methods, reduction of time required for projects approval, early drilling of wildcats, improvements in the efficiency of water injection, among others. In the long term, Petrobras performed a critical analysis of the recovery factor for each reservoir, identifying bottlenecks and evaluating technological solutions with multidisciplinary teams. Results indicate a significant increase in production in 2017 and the proposal of new projects in these fields. This paper presents the methodology used in the program and the results obtained so far for the giant oil fields of Roncador, Marlim Sul, Marlim Leste, Barracuda, Caratinga and Albacora Leste, responsible for approximately 20% of all Brazilian production. It also presents the future applications in fields where reduction of costs and technical solutions can contribute to increase production and reserves." ]

[ "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008." ]

[ "A423" ]

[ "The objective of this paper is to present how Petrobras is successfully managing production losses due to mineral scale formation in subsea production wells from its biggest offshore field1. Marlim Field, discovered in 1985 with a STOIIP estimated at 1,012 million STD m3 (6,369 million STB) and a field area of 146 km2 is located in water depths ranging from 600 m to 1100 m.Current Marlim Field production, around 446,754 bpd is supported by injecting 761,971 bpd of sea water. The water production is 217,150 bpd (water cut = 32%) and GOR is 82 STDm3/STDm3. A total of 117 wells are on operation, with 73 producers and 44 water injectors. The field was developed using subsea completion through the vertical, deviated and horizontal wells, equipped with cased hole and open hole gravel packed screens. Scale formation has occurred as a consequence of the incompatibility between the barium and strontium present in formation water and the high amount of sulfate in the injected seawater. To avoid production losses a plan of water management was implemented, including frequent produced water chemical analyses to investigate the convenience for applying a chemical bullhead treatment to remove scale in the production wells (tubing, screen, gravel pack and near well bore)2,3,4. This paper presents results from dissolver treatments performed in the field and also from a special investigation using a rig in a horizontal well. Valuable information was obtained in this intervention, clearing up the scaling occurrence phenomena in this scenario, allowing therefore an improvement on productivity recovery of the wells.", "Petrobras produced 1.98 million boe/day in January 2004, 1.9% less than in January 2003 and 1.4% less than in December 2003. Domestic output of 1.73 million boe/day was down by 1.3% on December 2003 because of outages on the P-40 platform at the Marlim Sul field, as well as on four wells in the Marlim and Voador fields. Domestic crude output was 1.47 million bpd in January, 1.7% less than December. Offshore output accounted for 1.22 million bpd and onshore 250,000 bpd. Domestic gas output was 40.8 million cu m/day, of which 21.3 million cu m/day was produced offshore and 19.5 million cu m/day onshore. Foreign oil output amounted to 165,000 bpd, of which 153,000 bpd was from onshore wells and the rest offshore.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "In 2004, after a cycle of 11 yr in which the annual increase in crude oil production was 8.6% avg, the production decreased 3%, according to Petrobras. In 2003, the production was 1.54 million bpd avg. The decline in production was due to delays in construction and the arrival of two Floating Production Storage Offloading vessels, the P-43 and P-48. The P-43 began to process crude oil on 12/22/2004. When the P-48 enters service, Petrobras will be able to increase its production of crude oil by 500,000 bpd. The P-43 is stationed in the Barracuda field, bay of Campos, offshore the state of Rio de Janeiro, in 800 m of water. Initial oil yield is 10,380 bpd of 25° gravity. Platform P-48, the twin of P-43, is part of the Barracuda-Caratinga project that will increase Petrobras crude oil production by 300,000 bpd. This platform will enter service in January 2005. With the new capacity, the production of crude oil by Petrobras is expected to reach 1.9 million bpd by the end of 2005. Other floating installations will contribute as well when they enter service, the P-50 and P-34. Petrobras is to invest $26,200 million until 2010 for E&P. Between 2005 and 2008, 17 installations will enter service allowing annual increases of 5.9% in production of crude oil and NGL, achieving self sufficiency in 2006. Petrobras has invested heavily in improved recovery that in the last 10 yr in the Marlim oilfield has yielded an additional increment of 3000 million bbl of crude oil. In November 2004 Petrobras gave a $47 million contract to the Western Geco company to make a three dimensional seismic study of the Marlim basin to identify reserves there. Discovery of an additional 290 million bbl of crude oil in Marlim is expected. On dry land, improved recovery enabled an increment of 200,000 bpd in production from the fields in the states of Bahia, Rio Grande do Norte, and Sergipe in 2004. In 2006-2007, the company expects to substitute for imports of light crude oil its own production to start in the oilfield offshore the state of Espírito Santo. This is lighter crude oil than that from the bay of Campos where the company now obtains 80% of its oil production. The Brazilian oilfields produce mainly heavy crude oil that has to be mixed with lighter imported crude oil to produce quality gasoline. However, Brazil increases its exports of heavy crude oil. The company is involved in new areas of exploration. They are discussed. The Brazilian Petroleum Authority, Agencia Nacional de Petroleo, will likely hold the 7th hydrocarbon licensing round for concessions in crude oil E&P in October 2005.", "Petrobras has been successfully dealing with deep water floating production systems using flexible pipes since 1977. During the completion of Marlim South 3 well in 1977, Petrobras was surprised by the occurrence of two birdcage type failures. At that time, Marlim South 3, in a water depth of 1709 m was the deepest offshore production well in operation. Since then. Petrobras has been testing flexible pipes using a field test known as DIP test. In a DIP test, an empty end capped sample of a flexible pipe, about 150m long, is partially-supported by the sea bottom and connected to a lay vessel by a pipe follower or a wire rope. The flexible pipe has to withstand a 4 hour period of cyclic bending due to the motions of the lay vessel. The DIP test has provided Petrobras with information on a new failure mode: lateral buckling in the armor wire. Although a birdcage failure is equally undesirable, lateral buckling of the armor wires implies more danger because it can go unnoticed. In 2001, a research project was set up by the Research and Development Center of Petrobras that was aimed at reproducing the flexible pipe failure modes under laboratory conditions. The purpose was to obtain a better understanding of the failure process, as well as to develop testing alternatives to avoid the significant costs related to DIP tests. In order to assess the effect of cyclic bending as a major factor in degrading the longitudinal compressive strength of flexible pipes 15 destructive tests were performed on 4-inch diameter flexible pipe samples. Two test rigs that accommodated three types of test and a number of test procedures were developed in the project. The number of bending cycles to failure for each sample was determined when subjected to compressive action corresponding to its operational depth. Tests to evaluate the effect of pre-existing damage were also conducted. Special attention was devoted to the effect of layer arrangement on compressive failure. The test results clearly identified the basic failure modes under investigation (i. e. birdcaging and lateral buckling of the armor wires). Suggestions regarding simplified testing procedures and corresponding performance criteria are also presented.", "This case focuses on the challenges regarding capacity building required to meet the huge increase of manpower demand by the offshore and shipbuilding sectors in Brazil and Rio Grande do Sul state. This arises from four key factors: end of monopoly of exploration and production of oil and gas in 1997, expanding the Brazilian offshore market; the Local Content policy adopted since 1999; national programs to stimulate the maritime industry such as the Fleet Modernization and Expansion Program created in 2004 to renew the fleet of Transpetro, a Petrobras subsidiary; and the expansion of Petrobras investments, partly due to the discovery of giant oil reserves in the Pre-salt layer in Brazil, in 2006. Since 2010, annual investments from Petrobras have reached US$ 40 billion/year, more than ten times the yearly investment in the 1997-2001 period. Consequently, offshore clusters have been developed in the country to build platforms, drilling ships and supply vessels, demanding massive training. In Rio Grande do Sul, three big shipyards and modules producers have installed. In this context, government created in 2003 the National Oil and Natural Gas Industry Mobilization Program (Prominp) and the National Plan of Professional Qualification (Pnqp) in 2006. Until 2013, circa US$ 120 million were invested to train nearly 100.000 people in 185 trades at several levels. In the state, training has been provided mainly by SENAI-RS, the state branch of the National Service of Industrial Apprenticeship, linked to the Federation of the Industries of Rio Grande do Sul. The large-scale actions undertaken for training have not been efficacious enough to meet the needs. Studies and discussions have raised factors that impact on shipyards' productivity and competitiveness. We consider alternatives to develop talents to accelerate the learning curve, anchored in the following axes: SENAI methodology for professional training; pre-selection of people according to specific abilities; the concept of a \"Living Lab\" training environment; familiarizing workers with productiveness indicators; efficient management paradigm; workers training aligned with the project repeatability principle. The local industry must be internationally competitive when the local content policy ends and labour productivity plays a crucial role in this aspect.", "Increasing inputs of harmful material Shipping Pollution from ships takes the form of both catastrophic events (shipwrecks, collisions and groundings) and chronic pollution from regular operational discharges. Good progress has been made over the past 40 years in reducing both. There have been large increases in the global tonnage of cargo carried by sea and in the distances over which those cargoes are carried. There have also been steady increases in the number of passengers carried on cruise ships and ferries. In spite of this, the absolute number of ship losses has steadily decreased. Between 2002 and 2013, the number of losses of ships of over 1,000 gross tonnage thus dropped by 45 per cent to 94. This is largely due to efforts under the three main international maritime safety conventions: the International Convention on the Safety of Life at Sea,87 dealing with ship construction and navigation, the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, 88 dealing with crew, and the International Convention for the Prevention of Pollution from Ships (MARPOL). Pollution from oil has been the most significant type of marine pollution from ships. The number of spills exceeding 7 tons has dropped steadily, in spite of the growth in the quantity carried and the length of voyages, from over 100 spills in 1974 to under five in 2012. The total quantity of oil released in those spills has also been reduced by an even greater factor. Progress has also been made in improving response capabilities, though much remains to be done, especially as coastal States have to bear the capital cost of acquiring the necessary equipment. Reductions in oil pollution have resulted from more effective enforcement of the MARPOL requirements, particularly in western Europe. The changes in arrangements for reparation for any damage caused by oil pollution from ships have improved the economic position of those affected. In spite of all that progress, oil discharges from ships remain an environmental problem, for example, around the southern tip of Africa and in the North-West Atlantic. Off the coast of Argentina, however, a solution to the impact of those discharges on penguin colonies seems to have been found by rerouting coastal shipping. The likely opening of shipping routes through the Arctic between the Atlantic and the Pacific risks introducing that form of pollution into a sea area where response infrastructure is lacking, oil recovery in freezing conditions is difficult and the icy water temperature inhibits the microbial breakdown of the oil. Pollution from cargoes of hazardous and noxious substances appears to be a much smaller problem, even though there are clearly problems with misdescriptions of the contents of containers. Losses of containers, however, appear to be relatively small: in 2011, the losses were estimated at 650 containers out of about 100 million carried in that year.", "With the prospect of about 200,000 bpd of crude oil productions from offshore fields operated by Petrobras being added to output in 2005, Brazil should be very close to self-sufficiency by the end of the year. Delays to the completion of three large platforms, which have now taken up stations at fields in the Campos Basin, coupled with declining production at several other aging fields at Campos and elsewhere, meant that an average of 50,000 bpd less was produced in 2004 than in 2003. The reduction occurred during a year when, after remaining static for 3 yr, demand increased by 3.5% to average 1.76 million bpd in 2004. as a result, the company had to import 173 million bbl of crude in 2004. The imported products, mainly diesel, naphtha, and LPG, cost about $10 more per barrel in 2004 than they had in 2003. A discussion covers impact of product prices; gas production; political matters; and newbuild vessels.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water." ]

[ "The delimitation of favourable zones for the fishing of three tuna species in the waters southeast and south of Brazil with oceanographic and satellite data was studied. Oceanographic data of surface temperature and fish catch (CPUE) data were correlated. Surface temperature intervals corresponding to larger fish catch for each species were determined." ]

[ "A321" ]

[ "Artisanal fisheries support millions of livelihoods worldwide, yet ineffective enforcement can allow for continued environmental degradation due to overexploitation. Here, we use spatial planning to design an enforcement strategy for a pre-existing spatial closure for artisanal fisheries considering climate variability, existing seasonal fishing closures, representative conservation targets and enforcement costs. We calculated enforcement cost in three ways, based on different assumptions about who could be responsible for monitoring the fishery. We applied this approach in the Patos Lagoon estuary (Brazil), where we found three important results. First, spatial priorities for enforcement were similar under different climate scenarios. Second, we found that the cost and percentage of area enforced varied among scenarios tested by the conservation planning analysis, with only a modest increase in budget needed to incorporate climate variability. Third, we found that spatial priorities for enforcement depend on whether enforcement is carried out by a central authority or by the community itself. Here, we demonstrated a method that can be used to efficiently design enforcement plans, resulting in the conservation of biodiversity and estuarine resources. Also, cost of enforcement can be potentially reduced when fishers are empowered to enforce management within their fishing grounds.", "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.", "Mangroves are productive ecosystems of tropical coastal landscapes, constituting habitat for many commercial fisheries, as the crab Ucides cordatus. In Brazil this crab holds a major socio-economic importance for artisanal fishery, but with obvious decline on their productivity. In this study we determined and mapped the more suitable mangrove areas for the conservation and fishery of this crab in the São Francisco River Estuary (Northeastern Brazil). We applied a Multi-Criteria Evaluation (MCE) in a GIS environment. Ten criteria in total were used, including crab biotic parameters, land use/cover and social factors. Maps of each criterion were produced by GIS techniques with CBERS and SPOT images and by field data. Mangroves more suitable for the conservation of U. cordatus (9.4 km2) are near to the river mouth, due to high density and frequency of non-commercial size crabs (NCSC), low density of commercial size crabs (CSC), small crabs and low degree of use for fishery. On the other hand, the mangroves for the crab fishery occurred with a similar area (10.2 km2) located farther away from the river mouth, with a high density and frequency of CSC, low density of NCSC, big crabs, medium-high degree of use for fishery and near to the villages. These information and thematic maps can aid government agencies in delineating extractive and fishery exclusion areas, thus contributing to the management plan for this species.", "Positive outlooks for fish biodiversity come from the evidence that individual fish populations respond positively to effective fisheries management (Hilborn and others, 2020) and that fish diversity and biomass increase within effective marine protected areas (Sala and Giakoumi, 2017). However, the global extinction of the smooth handfish Sympterichthys unipennis (Last and others, 2020) is a reminder that fish biodiversity continues to face significant threats as well. Both positive and negative outcomes are known because fishes continue to be among the most systematically studied and monitored components of marine ecosystems, mostly because of their economic value. Nonetheless, considerable fish diversity remains to be discovered: expert estimates indicate that at least another 700 fish species (approximately a 50 per cent increase over the number of currently known species) are yet to be described from the New Zealand exclusive economic zone and extended continental shelf alone (Gordon and others, 2010; Roberts and others, 2019). Further increase in capacity in taxonomy and biosystematics (Taxonomy Decadal Plan Working Group, 2018) and the integration of data from existing biodiversity collections (Nelson and others, 2015) and other sources (Edgar and others, 2016) would pave the way for more comprehensive, synthetic analyses of fish biodiversity over the near to medium term. In addition to improving our understanding of fish biodiversity, improved estimates of fish biomass are needed for some ocean zones, such as the pelagic zone. While it is estimated that mesopelagic fishes dominate global fish biomass, estimates of their biomass span several orders of magnitude and, therefore, the exact contribution that this group makes to global patterns remains poorly understood (Irigoien and others, 2014; Hidalgo and Browman, 2019). In addition, while there are no current estimates of species richness or biomass of bathypelagic fishes, which reside in the world’s largest environment (in terms of volume), it is highly likely that those fishes constitute a large portion of global fish biomass (Sutton and others, 2017). Since the first Assessment, the disposal of deep-sea mining water after ore removal has emerged as a significant threat to bathypelagic fishes (Drazen and others, 2019). Key knowledge and capacity gaps in fish biodiversity are summarized in table 5", "The fragmented and sectoral character of conservation as well as development policies has exacerbated the problems faced by small-scale fishers in developing countries. In Ilha Grande Bay (Rio de Janeiro, Brazil), traditional small-scale fishers (“Caiçaras”) has struggled to respond to the contemporary challenges of overfishing and territory loss, which emerged, in part, as consequence of biodiversity conservation and development policies implemented over the last fifty years. In this paper, we aim to explore a sustainable territorial development approach to improve quality of life of fishing communities while conserving the land and seascape that they explore. We first look at the past phases of the development trajectory of Ilha Grande Bay in order to plan for the future. Data collection involved analysis of documentary sources, direct observation in decision-making arenas, and semi-structured interviews. We analyzed four periods from the development trajectory, focusing on small-scale fishing. Our findings show that the set of policies reviewed has strengthened the connections between biodiversity loss and poverty over the years. The viability of STD strategies depends on the recognition of the complexity of interactions among fisheries, environmental protection and tourism, and on the need to create a supply chain that adds value to fishery products which sustain livelihoods and has low environmental impact.", "The composition of estuarine fish fauna is dynamic and complex. Despite the variation in fish fauna in estuaries, it is possible to observe some species associated with microhabitats. The assemblage composition of these communities is apparently derived from habitat selection. The aim of this study was to assess the structure of the demersal fish fauna of the Paranaguá Bay and its relationship with biotic and abiotic factors. To this end, monthly collections were conducted using an otter trawl, from October 1999 to September 2000, at five sites in the shallow infralittoral. Biotic (organic matter, and invertebrates) and abiotic factors (salinity, temperature, pH, dissolved oxygen, seston, and nutrients) were recorded during sampling. A total of 6,623 individuals were captured, belonging to 2 species of Chondrichthyes and 53 species of Actinopterygii (26 families). Sciaenidae was the most representative in terms of richness, with 11 species, and Ariidae was the most representative in terms of abundance. The catfish Cathorops spixii was the most abundant species, representing 21 % of the entire catch. There were significant differences in the composition and abundance of the fish fauna among the studied areas, as evidenced by the Shannon-Wiener diversity index. Such differences seem to be related to the complexity of habitats, which occur due to different types of bottom cover found at each sampling site. The abiotic variables indicated little influence on the structure of the fish assembly. These results contribute to a better understanding of the fish fauna from the shallow infralittoral areas of the Paranaguá Bay, and provide data to decision makers for better implementation of management and conservation measures.", "Higher mortality and less successful reproduction of marine biotas Species structure of highly productive sea areas Many human activities have been documented to have impacts on marine life living on the seabed (benthic communities). The adverse effects of mobile bottom-contacting fishing gear on coastal and shelf benthic communities have been documented essentially everywhere that such gear has been used. Bottom trawling has caused the destruction of a number of long-lived cold-water coral and sponge communities that are unlikely to recover before at least a century. Many reviews show that, locally, the nature of those impacts and their duration depend on the type of substrate and frequency of trawling. Those effects have been found in all the regional assessments. With regard to fish and pelagic invertebrate communities, much effort has been devoted to teasing apart the influences of exploitation and of environmental conditions as drivers of change in fish populations and communities, but definitive answers are elusive. Most studies devote attention to explaining variation among coastal fishcommunity properties in terms of features of the physical and chemical habitats (including temperature, salinity, oxygen and nutrient levels, clarity of, and pollutants in, the water column) and of depth, sediment types, benthic communities, contaminant levels, oxygen levels and disturbance of the sea floor. All of those factors have been shown to influence fish-community composition and structure in at least some coastal areas of each ocean basin. The scale at which a fish-community structure is determined and its variation is documented can be even more local, because some important drivers of change in coastal fish communities are themselves very local in scale, such as coastal infrastructure development. Other obvious patterns are recurrent, such as increasing mortality rates (whether from exploitation or coastal pollution) leading both to fish communities with fewer large fish and to an increase in species with naturally high turnover rates. However, some highly publicized projections of the loss of all commercial fisheries or of all large predatory fish by the middle of the current century have not withstood critical review.", "The assemblage and functional structure of the fish fauna of the Maracaípe River, municipality of Ipojuca - PE, was characterized by monthly beach trawls carried out from March of 2012 to February of 2013. A beach trawl net (picaré) was used at three different points of the estuary (EST 1, EST 2 and EST 3) during day and night trawls. The captured specimens were measured and weighed in the laboratory, identified and separated into use and trophic guilds using appropriate literature. Abiotic variables (temperature, salinity, dissolved oxygen, pH, turbidity and chlorophyll-a) were analyzed as for differences between day periods (night and day) and seasons (dry and rainy), and correlated to fish abundance. No difference was detected between day periods (p>0.07 for all variables), but they differed between seasons for most variables (p?0.02), and between sampling points only for dissolved oxygen (p=0.03). In one year of collection, 11,513 specimens were captured, belonging to 92 species, 38 families and 15 orders. Gerreidae, Atherinopsidae, Clupeidae, Gobiidae and Hemiramphidae were responsible for 82.9% of the total abundance. The estuary of the Maracaípe River presents a rich ichthyofauna, but with the quantitative predominance of seven species (Atherinella brasiliensis, Eucinostomus argenteus, E. melanopterus, Ulaema lefroyi, Lile piquitinga, Ctenogobius boleosoma and Hyporhamphus unifasciatus). In the estuary, six species classified as vulnerable on the IUCN Endangered Species List were reported. The estuary presents a high diversity of species, most of them marine, carnivorous, and opportunistic, showing the high resilience of this environment. The predominance of juvenile fish underscores the importance of the Maracaípe River estuary for the maintenance of population stocks of coastal species, demonstrating the urgent demand of management of this environment.", "The analysis of hydrocarbons in terms of individual compounds is relevant to understand the origin and source of these substances, as well as its distribution in environmental compartments, including sediments and biota. Hydrocarbons concentrations were determined in sediments and in whole-body soft tissues of the tropical clam Anomalocardia flexuosa in sediment toxicity testing using samples of Mucuripe bay (Ceará State, NE Brazil) collected in 2011 during dredging events [1]. Data of target compounds included aliphatic (AHs) and aromatic hydrocarbons (PAHs), and linear alkylbenzenes (LABs). AHs compounds were determined on gas chromatography with flame ionization detector (GC-FID), while PAHs and LABs were determined on gas chromatography coupled to a mass spectrometer (GC/MS) in a selected ion mode (SIM). The potential of this dataset is baseline information on hydrocarbons contamination in sediments from a semi-arid region and the bioaccumulation of organic contaminants in marine organisms that can be used as models in ecotoxicological studies.", "Inputs and resources Land and water are the most important resources for aquaculture development. Gentry and others (2017) estimated that 11,400,000 km2 of coastline are suitable for fishes, and more than 1,500,000 km2 could be developed for bivalves. The challenge is to secure suitable land and water resources for the development of aquaculture at the national level. Good quality seeds and optimal feeds are essential. Most animal species are cultured with external feeds, and feeding the ever-expanding aquaculture sector has been a concern. In 2016, about 55.6 million tons of farmed fishes (including Indian carps) and crustaceans depended on external feeds (composed of fresh ingredients, farm-made or commercially manufactured) (FAO, 2018b). In 2005, aquaculture consumed about 4.2 million tons of fishmeal (18.5 per cent of total aquafeeds by weight). By 2015, this had been reduced to 3.35 million tons (7 per cent of total aquafeeds by weight). Even with increasing production globally, the use of fishmeal for aquafeeds will decrease further to 3.33 million tons by 2020 (5 per cent of total aquafeeds by weight for that year). Efforts towards making sustainable feeds by replacing fishmeal and fish oils with plant-based feed can have an impact on levels of omega-3 fatty acids and the nutritional value of farmed fishes. The industry can make strategic use of fish oils in fish feed by feeding these essential compounds to farmed fishes at key life stages. Nevertheless, for aquaculture to grow, aquafeed production is expected to continue growing at a similar rate, to 69 million tons by 2020 (Hasan, 2017). Considering past trends and predictions, aquaculture sustainability is more likely to be closely linked with the sustained supply of terrestrial animal and plant proteins, oils and carbohydrate sources for aquafeeds (Troell and others, 2014). The aquaculture sector should therefore strive to ensure sustainable supplies of terrestrial and plant-based feed ingredients, including algae and processing waste, that do not compete directly with use for feeding people directly." ]

[ "Most of Brazilian oil and gas reserves are located in offshore deep waters. In this scenario, high well productivity is essential. Artificial lift will certainly play an important role in the exploitation of those deep water fields. This paper describes the most important artificial lift methods, their main characteristics and application niches. It also shows what Petrobras is currently doing in order to make them available for subsea use. The following methods are analyzed: gas lift; electrical submersible pump; hydraulic jet pump; progressing cavity pump; multiphase pump; subsea separation system." ]

[ "A499" ]

[ "Petrobras, as the largest operator in ultra-deep waters in South America, has been using a field development concept that has proved to be winner since 2010. This concept is well suited for fields with high productivity wells, which produce more than 20,000 barrels of oil per day. In the market, this concept is known as “satellite wells”. In this scenario, Petrobras has benefited from its strategy of standardizing subsea equipment, including Wet Christmas Trees (WCT), Flexible Pipes, Umbilicals and Subsea Manifolds. However, since the downturn of 2014, Petrobras has been struggling to simplify its own specifications, looking for the most attractive CAPEX solutions in the market, allowing suppliers to use their own knowledge and experiences to propose low cost solutions, meeting projects requirements. From 2015 onwards, Petrobras has been working with the suppliers, with the Early Engagement initiative, aiming that the integration synergies, existing assets and the experience of these suppliers, could bring to the projects, the benefits of CAPEX reduction, and allowing the advancement and approval of these projects internally in the company. Technological development programs to allow the use of flexible pipes that are resistant to contaminants such as CO2 and H2S, new CRA materials to be applied to rigid flowlines and low-cost riser configurations, have been pursued by Petrobras in order to enable the implementation of ultra-deep water projects.", "With the application of new technologies for processing and interpreting seismic data, PETROBRAS, in recent years, has achieved great success in the discovery of giant oil fields underlying thick layers of rock salt. Due to the mechanical behavior of these rocks, subject to the creep phenomenon, it was developed a large research and development project in order to determine the creep properties of these rocks and the application of computational simulations to predict the behavior of deep wells during the drilling of these layers. If on one hand the salt layers, with thicknesses ranging from 2000m to 5000 m, are a challenge in drilling activity, they can be considered in the logistic flow of gas and final destination of CO2. The rock salt has negligible porosity when compared to other geomaterials, which guarantees excellent impermeability to most fluids and gases, even under high pressures. Another phenomenon associated with rock salt is the process of self-healing. Taking advantage of these physical-chemical and structural properties of rock salt, caverns opened by dissolution in salt domes have been used for storage of hydrocarbons and other products. Considering the large regional thicknesses and continuity of rock salt overlying the presalt reservoirs, PETROBRAS is studying the strategy and technical and economic feasibility for the use of underground storage of natural gas and CO2 in salt caverns. Despite being a technology already dominated worldwide is unprecedented, the offshore application in deep and ultra-deep water.", "A discussion covers the three consecutive PROCAP programs. They are the engineering programs that the state owned Petrobras developed with respect to exploitation in ultra deep waters. Five factors that have been decisive for success in the exploitation of petroleum in deep and ultra deep waters in the Campos basin of Brazil are addressed. The present configuration of the program with some details of the program systemics is described. Three of the most difficult technologies to perfect in deep water are considered. The topics relate to the potential of the resources of oil and gas in the deep waters of Brazil; the motivation and focus on the deep waters to extract oil and gas with the success of Petróbras in doing so; the success of Petróbras in deep water exploration as due to its association with industry to resolve all engineering obstacles; the principal achievements of PROCAP as involving the acquisition of FPSO and semi-submersibles technology; PROCAP-3000, launched in June 2000 to discover and exploit fields at 3000 m depth; sub sea system of warm-up of piping and electric pumps; sub sea system to separate water from oil and gas; and conclusions. PROCAP1000, active in 1986-1991, dealt with exploitation at depths of 1000 m. PROCAP-2000, active in 1992-1999, dealt with exploitation in waters of 2000 m depth. The PROCAP-3000 program is active in the period 2000-2005 at depths of 3000 m. The Petróbras installation of the world's first intelligent submarine system, entirely electric, InCharge, installed by Baker Oil Tools is described. Petróbras uses the InCode software of Baker Oil Tools to control well equipment. The installation of InCharge in deep water is the culmination of a 5-yr development project with participation of Baker Oil Tools, Baker Atlas, Petróbras, and QuantX. In December 2002 Petróbras had 11,000 million boe in proven reserves according to SPE methodology. The reserves on land are only 11% of this total. Of the rest, 76% are in waters over 400 m deep and 46% of Petróbas reserves are at depths > 1000 m. The forecast and statistical examination of the production of oil and gas by Petróbras is provided graphically from 1982 to 2002 for flow rates of oil in barrels per day; mixture of production on dry land and at various depths of water in barrels per day of oil since 3/14/2003; and tabulation of the total production of hydrocarbons in various areas of Brazil of LNG, oil, and natural gas from 2000 to 2003.", "Petrobras has almost 30yr experience of developing oil and gas resources offshore Brazil. Most important is the company's success in developing technologies for deepwater production systems in the Campos Basin. These technological challenges and developments are described together with specific development programmes for the deepwater Albacora and Marlim oilfields.", "The oil industry's search for new hydrocarbon accumulations has led to the drilling of ever deeper wells, normally under harsh conditions that involve high pressures, temperatures and mechanical strengths as well as sour gas production. In order to perform drill-stem tests (DSTs) safely, these constraints must be overcome. PETROBRÁS, the Brazilian state owned oil company, has been drilling wells in ever deeper horizons, reaching up to 18,000 ft (5,500 m). During the last five years some important areas have been discovered, especially offshore, of which the Tubarao Field in Southern Brazil is one example. Based on well-testing experiences in the North Sea, as well as the company's own experience, PETROBRÁS has developed a new approach for testing deep wells: The use of a simple and reliable test-string assembly, achieved by reducing and replacing components, and the adoption of extremely rigorous safety standards and careful selection of materials suitable for use in the presence of hydrogen sulphide. This paper presents a field-proven well-testing design, whose main concerns are offshore safety and environmental quality.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "Petrobras has indulged in R&D programs and technology partnerships with key contractors, opening up offshore development opportunities within Brazil. One of the main contractors helping Petrobras to achieve its goals on Marlim is FMC Technologies Inc. The subsea separation, pumping, and water reinjection system will be installed in 899 m water depth to meet the challenge of increased water production. Petrobras has awarded FMC an additional subsea separation and boosting system contract for the brownfield Congro and Corvina development, also in the Campos basin. Petrobras has recently completed its successful Procap 3000 research program, which was a driver for many of the operator's deepwater advances. In the Future Vision Procap program, the company is laying emphasis on the pursuit of solutions that could significantly alter current standards for developing deepwater fields.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted.", "The continuous discoveries of oil fields in deep and ultra-deep Brazilian waters and the excessive wide fluctuations on the rig rates were the reasons for PETROBRAS to enhance the capability of one of its owned semi-submersible drilling rig. This paper aims to present an overview of the main technical aspects of the design and yardwork for the upgrading of semi-submersible drilling rig P-10 unit capacity from 500 m to 1200 m water depth. The upcoming ultra-deep waters scenario in Brazilian offshore, that includes East Albacora, Roncador Phase 2, South Marlim Phase 2 and East Marlin oil fields, demands a further step. Then, preliminary studies were carried out to probe the water depth limit, without hull upgrading, just applying the technologies, that it had in mind since the beginning of this upgrading project, but still needed further tests to bridge the gap until safety utilization. Now, the deep water technologies of taut-leg mooring with polyester rope and risers for slender wells may already be considered applicable. A new pile anchor installation concept was developed, field tested and certified. Altogether, they allow one to predict the feasibility of a new upgrading for P-10 with very limited budget, keeping alive the utilization of this anchor moored drilling unit at waters possibly up to 2000 meters, a new scenario it was initially thought that could be efficiently reached only by means of dyanamic positioning units." ]

[ "BG Group recently produced a new estimate on the Tupi oil discovery in the Santos basin, stating that the field contains 12-30 billion boe or more. On the one hand, Brazil's Petroleo Brasileiro SA (Petrobras) did not comment on the revised production estimate. It can be remembered that Petrobras reported the discovery to be 8 billion bbl of light crude in 2007. Meanwhile, BG claim have been produced in a statement regarding the company's long-term growth strategy, released ahead of the presentation of its fourth-quarter results." ]

[ "A1056" ]

[ "Petrobras and the UK's BG Group are studying the possibility of installing floating gas-liquefaction plants at the large offshore oil and gas discoveries in the Campos basin's pre-salt areas. The proposed 14 million cu m/day LNG plant would be moored 300 km offshore and would collect gas from various fields in the area, including the giant Tupi discovery. LNG would be delivered to domestic terminals during the country's dry season when, gas-fired power generation supplements hydropower, and exported at other times.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "The 3 million bpd of crude oil produced globally in deep waters represent only 4% of the total explored volume by the petroleum industry. However, the expectation of a large increase in demand for energy in the coming decades is attracting new investments by oil companies. Although a matter that dominates the scene in Brazil, E&P in deep waters has marginal international participation and encounters unexplored frontiers. The global oil industry has discovered about 60,000 million bbl of petroleum in deep waters, half of which since 1995 has occurred in Brazil, Gulf of Mexico, and Western Africa, according to one study. In a study by the Total company, 90% of the global reserves of petroleum in deep waters of about 50,000 million bbl, are to be found in the \"Golden Triangle\" of the petroleum industry, namely, Brazil, Gulf of Mexico, and Western Africa. There is a consensus that the high prices for petroleum are an indication that exploration for petroleum in deep waters off Latin America may significantly increase the reserves of the region. The world consumes about 75,000 million bpd of crude oil and 6.5 MMM cu m/day of natural gas. Hardly some 3 MM bpd of crude oil are produced in deep waters or 4% of the total volume explored. In the coming three decades the demand for energy is expected to increase by two thirds and between now and 2015 the production in deep waters could triple reaching over 8 MM bpd. In the Offshore Magazine study on FPSO, of the 106 FPSO now operating in 23 countries, 16 are in Brazil. Of the 106 FPSO, 13 operate in waters at greater than 1,000 m depth. Of these 13, 7 are in Brazil, 4 in Angola, and 2 in Nigeria. In 2006, 21 FPSO are being built or being converted in the world and 56 FPSO are being bid for, will be bid for, or are in the final stage of conception and design. The large part of these projects is Brazilian. From now to 2010, 2,011 new underwater production projects will be initiated in Brazil that will include about 20 new platforms. In addition to offshore Brazil, Petrobras is active offshore Argentina and Colombia and has joined with large companies to explore in deep waters in the Gulf of Mexico.", "Petrobras announced a \"giant\" discovery in the northern part of Campos Basin, of at least an estimated recoverable 0.6 billion bbl of heavy oil. The reservoir, about 80 km offshore, was initially discovered in January 2001. The country's last major find, the 3 billion bbl, ultra-deep-water Roncador field, was made by Petrobras in 1996.", "Brazil's oil development continues its remarkable progress; latest figures show crude oil output averaged 160,000 bpd, strong 8% increase over 1967; largest producer became Miranga field, discovered only in 1965 (see Engineering Index 1967 p 1699), where 120 wells have been drilled, and average total output amounted to 39,000 bpd; extensive drilling program has contributed to proven reserves of Petrobras, calculated at end of 1967 at 800 million bbl and 24. 5 billion cu m or around 850 billion cu ft of gas; offshore development is considered most promising, as sedimentary section of about 6000 m thickness has been indicated by previous geophysical and seismic surveys on Continental Shelf.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Petroleum exploration along the West African and South American Equatorial Margin has led to important oil discoveries along both margins. Similar geochemical characteristics of these finds suggest analogous petroleum systems with enormous potential in the conjugate margin sedimentary basins. The Jubilee giant oil discovery offshore Ghana has an estimated recoverable reserve of about 600 million barrels. In the area that was once connected to the equatorial West African margin, but is now separated by the Atlantic Ocean, two discoveries have recently been announced. Tullow Oil announced the Zaedyus discovery offshore French Guinea, with 72m net oil pay in turbidite sandstones. Petrobras and BP announced the Pecem discovery in the northern Brazilian margin, with 140m of net pay in 2,129m water depth in the Ceara Basin. These discoveries appear to have a very similar geologic evolution, source rock facies, and oil types suggesting similar petroleum systems. Additionally, the integration of high resolution geochemical data from oils recovered from boreholes offshore the other basins along the South Atlantic Equatorial Margin has revealed four separate source rock systems: 1- an Aptian/Barremian calcareous black shale associated with a lacustrine brackish to saline anoxic environment; 2- a Late Aptian calcareous shale deposited in transitional environments, as indicated by oils found in the Ceará and Potiguar basins; 3- an Albian/Cenomanian/ Turonian marine shale corresponding to an anoxic event widespread in the West African salt basins, particularly in the deep water settings of the Ghana and Angola continental margins. Similar oils have also been registered in the Foz do Amazonas Pará-Maranhão basins and in five ultra-deep water accumulations discovered recently (2011-2012) in the Sergipe Basin; 4- Paleocene-Eocene shales deposited in deltaic environments in the Niger Delta, the Amazon Cone, and Pará-Maranhão Basin. This work aims to restore these basins to their previous pre-breakup locations and to support new exploration efforts. Despite similarities shown above, simply matching discoveries in the conjugate margin basins, for example the Tano Basin offshore Ghana, with the Ceará Basin in northern Brazil, does not necessarily yield the entire story that may lead to a successful end. There is a great deal of contrasting sedimentary and structural development peculiarities from basin to basin and margin to margin. The application of a high-resolution petroleum system approach can lead to better exploration models for these basins and provide clues on the best strategy for drilling the new prospects that have been identified in the ultradeepwater regions of the South Atlantic Equatorial Margin.", "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030.", "Forty-four companies competed for 23 blocks - 13 offshore and 10 onshore - in Brazil's second bid round in June 2000. That 21 of the 23 blocks on offer were licensed shows that the country remains a big draw among E&P firms. The top bidders include a consortium between Santa Fe Snyder (operator, 45%) and Construtora Norberto Odebrecht (15%), which paid 12.025 million real ($6.68 million) for Block BM-C-8 in the Campos basin; Shell, which offered 65.16 million real for the hotly contested Campos Block BM-C-10, for which it was the sole bidder; and Petrobras, with eight winning bids." ]

[ "The new map shows the way in which the ocean consists of four main basins (the Arctic Ocean, the Atlantic Ocean, the Indian Ocean and the Pacific Ocean) between the tectonic plates that form the continents. The tectonic plates have differing forms at their edges, giving broad or narrow continental shelves and varying profiles of the continental rises and continental slopes leading from the abyssal plain to the continental shelf. Geomorphic activity in the abyssal plains between the continents gives rise to abyssal ridges, volcanic islands, seamounts, guyots (plateau-like seamounts), rift valley segments and trenches. Erosion and sedimentation (either submarine or riverine when the sea level was lower during the ice ages) has created submarine canyons, glacial troughs, sills, fans and escarpments. Around the ocean basins there are marginal seas, partially separated by islands, archipelagos or peninsulas, or bounded by submarine ridges. These marginal seas have sometimes been formed in many ways: for example, some result from the interaction between tectonic plates (for example the Mediterranean), others from the sinking of former dry land as a result of isostatic changes from the removal of the weight of the ice cover in the ice ages (for example, the North Sea). The water of the ocean circulates within these geological structures. This water is not uniform: there are very important physical and chemical variations within the sea water. Salinity varies according to the relativity between inputs of freshwater and evaporation. Sea areas such as the Baltic Sea and the Black Sea, with large amounts of freshwater coming from rivers and relatively low evaporation have low salinity – 8 parts per thousand and 16 parts per thousand, respectively, as compared with the global average of 35 parts per thousand (HELCOM 2010, Black Sea Commission 2008). The Red Sea, in contrast, with low riverine input and high insolation, and therefore high evaporation, has a mean surface salinity as high as 42.5 parts per thousand (Heilman et al 2009). Seawater can also be stratified into separate layers, with different salinities and different temperatures. Such stratification can lead to variations in both the oxygen content and nutrient content, with critical consequences in both cases for the biota dependent on them. A further variation is in the penetration of light. Sunlight is essential for photosynthesis of inorganic carbon (mainly CO2) into the organic carbon of plants and mixotrophic species1 . Even clear water reduces the level of light that can penetrate by about 90 per cent for every 75 metres of depth. Below 200 metres depth, there is not enough light for photosynthesis (Widder 2014). The upper 200 metres of the ocean are therefore where most photosynthesis takes place (the euphotic zone). Variations in light level in the water column and on the sea bed are caused by seasonal fluctuation in sunlight, cloud cover, tidal variations in water depth and (most significantly, where it occurs) turbidity in the water, caused, for example, by resuspension of sediment by tides or storms or by coastal erosion. Where turbidity occurs, it can reduce the penetration of light by up to 95 per cent, and thus reduce the level of photosynthesis which can take place (Anthony 2004)." ]

[ "B2249" ]

[ "Impacts of climate change and related changes in the atmosphere Ocean circulation The intensified study of the ocean as part of the study of climate change has led to a much clearer understanding of the mechanisms of ocean circulation and its annual and decadal variations. As a result of changes in the heating of different parts of the ocean, patterns of variation in heat distribution across the ocean (such as the El Niño-Southern Oscillation) are also changing. Those changes in patterns result in significant changes in weather patterns on land. Water masses are also moving differently in areas over continental shelves, with consequent effects on the distribution of species. There is evidence that the global circulation through the open ocean may also be changing, which might lead, over time, to reductions in the transfer of heat from the equatorial regions to the poles and into the ocean depths. Storms and other extreme weather events Increasing seawater temperatures provide more energy for storms that develop at sea. The scientific consensus is that this will lead to fewer but more intense tropical cyclones globally. Evidence exists that the observed expansion of the tropics since approximately 1979 is accompanied by a pronounced poleward migration of the latitude at which the maximum intensities of storms occur. This will certainly affect coastal areas that have not been exposed previously to the dangers caused by tropical cyclones. Ultraviolet radiation and the ozone layer The ultraviolet (UV) radiation emitted by the sun in the UV-B range (280-315 nanometres wavelength) has a wide range of potentially harmful effects, including the inhibition of primary production by phytoplankton and cyanobacteria, changes in the structure and function of plankton communities and alterations of the nitrogen cycle. The ozone layer in the Earth’s stratosphere blocks most UV-B from reaching the ocean’s surface. Consequently, stratospheric ozone depletion since the 1970s has been a concern. International action (under the Montreal Protocol on Substances that Deplete the Ozone Layer) to address that depletion has been taken, and the situation appears to have stabilized, although with some variation from year to year. Given those developments and the variations in the water depths to which UV-B penetrates, a consensus on the magnitude of the ozone-depletion effect on net primary production and nutrient cycling has yet to be reached. There is, however, a potential effect of ultraviolet on nanoparticles.", "Increasing inputs of harmful material Eutrophication Eutrophication resulting from excess inputs of nutrients from both agriculture and sewage causes algal blooms. Those can generate toxins that can make fish and other seafood unfit for human consumption. Algal blooms can also lead to anoxic areas (i.e. dead zones) and hypoxic zones. Such zones have serious consequences from environmental, economic and social aspects. The anoxic and hypoxic zones drive fish away and kill the benthic wildlife. Where those zones are seasonal, any regeneration that happens is usually at a lower trophic level, and the ecosystems are therefore degraded. This seriously affects the maritime economy, both for fishermen and, where tourism depends on the attractiveness of the ecosystem (for example, around coral reefs), for the tourist industry. Social consequences are then easy to see, both through the economic effects on the fishing and tourist industries and in depriving the local human populations of food.", "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "In the present chapter, the current physical and chemical state of the ocean and its trends are analysed using seven key climate change indicators: Sea level.Sea level integrates changes occurring in the Earth’s climate system in response to unforced climate variability, as well as natural and anthropogenic influences. It is therefore a leading indicator of global climate change and variability. Ocean circulation. Ocean circulation plays a central role in regulating the Earth’s climate and influences marine life by transporting heat, carbon, oxygen and nutrients. The main drivers of ocean circulation are surface winds and density gradients (determined by ocean temperature and salinity), and any changes in those drivers can induce changes to ocean circulation. Sea temperature and ocean heat content. The rapid warming of the global ocean over the past few decades has affected the weather, climate, ecosystems, human society and economies (Intergovernmental Panel on Climate Change, 2019). More heat in the ocean is manifested in many ways, including an increasing interior ocean temperature (Cheng and others, 2019b), a rising sea level caused by thermal expansion, melting ice sheets, an intensified hydrological cycle, changing atmospheric and oceanic circulations and stronger tropical cyclones with heavier rainfall (Trenberth and others, 2018). Salinity. With the advent of improved observational salinity products, more attention has been paid to ocean salinity in Intergovernmental Panel on Climate Change assessment reports (fourth report, Bindoff and others, 2007; and fifth report, Rhein and others, 2013) and in the first World Ocean Assessment (United Nations, 2017). Changes to ocean salinity are important given that the global ocean covers 71 per cent of the Earth’s surface and contains 97 per cent of the Earth’s free water (Durack, 2015). Any global water changes will be expressed in the changing patterns of ocean salinity, a water cycle marker of the largest reservoir of the climate system. Ocean acidification. Rising concentrations of CO2 in the atmosphere also have a direct effect on the chemistry of the ocean through the absorption of CO2. The ocean absorbed roughly 30 per cent of all CO2 emissions in the period from 1870 to 2015 (Le Quéré and others, 2016; Gruber and others, 2019), and the increased CO2 level in the water lowers its pH through the formation of carbonic acid. Dissolved oxygen. Variations in oceanic oxygen have a profound impact on marine life, from nutrient cycling to pelagic fish habitat boundaries (e.g., Worm and others, 2005; Diaz and Rosenberg, 2008; Stramma and others, 2012; Levin, 2018) and can influence climate change through emissions of nitrous oxide, a potent greenhouse gas (e.g., Voss and others, 2013). Sea ice. Sea ice in the polar regions covers about 15 per cent of the global ocean and affects the global climate system through its influence on global heat balance and global thermohaline circulation. In addition, sea ice has a high albedo, reflecting more sunlight than the liquid ocean, and its melt releases fresh water, which slows the global ocean conveyor belt (the constantly moving system of deep-ocean circulation driven by temperature and salinity). The present chapter, using those indicators, contains details of the impacts of climate change on the physical and chemical state of the ocean and its evolution and spatial patterns. It is to be read in conjunction with chapter 9, in which extreme climate events (marine heatwaves, extreme El Niño events and tropical cyclones) are analysed and the pressures of some of the physical and chemical changes on marine ecosystems and human populations are described in more detail. Some additional aspects are covered in the section on high-latitude ice in chapter 7 on trends in the state of biodiversity in marine habitats.", "The complex system of the atmosphere and ocean currents is also crucial to the distribution of life in the ocean, since it regulates, among other factors, (as said above) temperature, salinity, oxygen content, absorption of carbon dioxide and the penetration of light and (in addition to these) the distribution of nutrients. The distribution of nutrients throughout the ocean is the result of the interaction of a number of different processes. Nutrients are introduced to the ocean from the land through riverine discharges, through inputs direct from pipelines and through airborne inputs (see Chapter 20). Within the ocean, these external inputs of nutrients suffer various fates and are cycled. Nutrients that are adsorbed onto the surface of particles are likely to fall into sediments, from where they may either be remobilised by water movement or settle permanently. Nutrients that are taken up by plants and mixotrophic biota for photosynthesis will also eventually sink towards the seabed as the plants or biota die; en route or when they reach the seabed, they will be broken up by bacteria and the nutrients released. As a result of these processes, the water in lower levels of the ocean is richer in nutrients.", "Imbalances in the freshwater cycle manifest themselves as changes in global sea level. Changes in global mean sea level are largely caused by a combination of changes in ocean heat content and exchanges of freshwater between the ocean and continents. When water is added to the ocean, global sea level adjusts, rapidly resulting in a relatively uniform spatial pattern for the seasonal ocean mass balance, as compared to the seasonal steric signal, which has very large regional amplitudes (Chambers, 2006). ‘Steric’ refers to density changes in seawater due to changes in heat content and salinity. On annual scales, the maximum exchange of freshwater from land to ocean occurs in the late Northern Hemisphere summer, and therefore the seasonal ocean mass signal is in phase with total sea level with an amplitude of about 7 mm (Chambers et al., 2004). Because most of the ocean is in the Southern Hemisphere, the seasonal maximum in the steric component occurs in the late Southern Hemisphere summer, when heat storage in the majority of the ocean peaks (Leuliette and Willis, 2011). Because globally averaged sea level variations due to heat content changes largely cancel out between the Northern and Southern Hemispheres, the size of the steric signal, globally averaged, is only 4 mm. Globally averaged sea level has risen at 3.2 mm/yr for the past two decades (Church et al., 2011), of which about a third comes from thermal expansion. The remainder is due to fluxes of freshwater from the continents, which have increased as the melting of continental glaciers and ice sheets responds to higher temperatures. Multi-decadal fluctuations in equatorial and mid-latitude winds (Merrifield et al., 2012; Moon et al., 2013) cause regional patterns in sea-level trends which are reflected in the El Niño/Southern Oscillation (ENSO) and the Pacific decadal oscillation (PDO) indices in the Pacific (Merrifield et al., 2012; Zhang and Church, 2012) and northern Australia (White et al., 2014). Interannual changes in global mean sea level relative to the observed trend are largely linked to exchanges of water with the continents due to changes in precipitation patterns associated largely with the ENSO; this includes a drop of 5 mm during 2010-11 and rapid rebound in 2012-13 (Boening et al., 2012; Fasullo et al., 2013).", "The winds in the atmosphere are the main drivers of these ocean surface currents. The interface between the ocean and the atmosphere and the effect of the winds also allows for the ocean to absorb oxygen and, more importantly, carbon dioxide from the air. Annually, the ocean absorbs 2,300 gigatonnes of carbon dioxide (IPCC, 2005; see Chapter 5). In addition to this vast surface ocean current system, there is the ocean thermohaline circulation (ocean conveyor) system (Figure 3). Instead of being driven by winds and the temperature difference between the equator and the poles (as are the surface ocean currents), this current system is driven by differences in water density. The most dense ocean water is cold and salty which sinks beneath warm and fresh seawater that stays near the surface. Cold-salty water is produced in sea ice “factories” of the polar seas: when seawater freezes, the salt is rejected (the ice is mostly fresh water), which makes the remaining liquid seawater saltier. This cold saltier water sinks into the deepest ocean basins, bringing oxygen into the deep ocean and thus enabling aerobic life to exist.", "Global surface ocean pH has declined on average by approximately 0.1 since the Industrial Revolution, an increase in acidity of about 30 per cent. Ocean pH is projected to decline by approximately an additional 0.3 over the next century unless global carbon emissions are significantly curtailed. The changes can be observed in extended ocean time series, and the rate of change is likely to be unparalleled in at least the past 66 million years. The time of emergence of the signal varies from 8 to 15 years for open ocean sites and 16 to 41 years for coastal sites, making it necessary to commit to long-term observational records, especially in the coastal zone, where most commercially and culturally important marine resources reside.Oceanic oxygen levels have declined in recent decades, with strong regional variations. While the overall oxygen content has decreased by about 2 per cent in five decades, oxygen in coastal areas or near oxygen minimum zones shows larger variations. Coastal changes are mostly fuelled by riverine run-off, and the open ocean changes are likely related to a combination of changes in ocean circulation and biogeochemical cycles. Temperature-driven solubility decrease is responsible for most near-surface oxygen loss, while other processes have to be accountable for deep-ocean oxygen loss. A further decrease in oxygen in and near oxygen minimum zones can lead to climate feedback through consequent greenhouse gas emissions.Sea ice covers 15 per cent of the global ocean and affects global heat balance and global thermohaline circulation. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. Arctic sea ice extent is declining by -2.7 ± 0.4 per cent c-1 during the winter, and -2.8 ± 2.3 per cent c-1 during the summer. In contrast, trends in total Antarctic sea ice extent are insignificant, 0.6 ± 0.6 per cent c-1 during the summer and 1.1 ± 3.7 per cent c-1 during the winter. Regionally, the spatial distribution of the trends is dramatic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. The spatial distribution of the changes in sea ice is attributed to changes in wind and ocean currents related to the Arctic Oscillation in the northern hemisphere and the Southern Annular Mode and El Niño in the southern hemisphere.", "Impacts of climate change and related changes in the atmosphere Sea-surface temperature The Intergovernmental Panel on Climate Change has reaffirmed in its fifth report its conclusion that global sea-surface temperatures have increased since the late nineteenth century. Upper-ocean temperature (and hence its heat content) varies over multiple time scales, including seasonal, inter-annual (for example, those associated with the El Niño-Southern Oscillation), decadal and centennial periods. Depth-averaged ocean-temperature trends from 1971 to 2010 are positive (that is, they show warming) over most of the globe. The warming is more prominent in the northern hemisphere, especially in the North Atlantic. Zonally averaged upper-ocean temperature trends show warming at nearly all latitudes and depths. However, the greater volume of the ocean in the southern hemisphere increases the contribution of its warming to the global heat content. The ocean’s large mass and high heat capacity enable it to store huge amounts of energy, more than 1,000 times than that found in the atmosphere for an equivalent increase in temperature. The earth is absorbing more heat than it is emitting back into space, and nearly all that excess heat is entering the ocean and being stored there. The ocean has absorbed about 93 per cent of the combined extra heat stored by warmed air, sea, land, and melted ice between 1971 and 2010. During the past three decades, approximately 70 per cent of the world’s coastline has experienced significant increases in sea-surface temperature. This has been accompanied by an increase in the yearly number of extremely hot days along 38 per cent of the world’s coastline. Warming has also been occurring at a significantly earlier date in the year along approximately 36 per cent of the world’s temperate coastal areas (between 30° and 60° latitude in both hemispheres). That warming is resulting in an increasingly poleward distribution of many marine species.", "The Southern Ocean (defined as all ocean area south of 60°S) deserves special mention due to its role in the storage of heat (and carbon) for the entire planet. The Antarctic Circumpolar Current (ACC) connects the three major southern ocean basins (South Atlantic, South Pacific and Indian) and is the largest current by volume in the world. The ACC flows eastward, circling the globe in a clockwise direction as viewed from the South Pole. In addition to providing a lateral connection between the major ocean basins (Atlantic, Indian, Pacific), the Southern Ocean also connects the shallow and deep parts of the ocean through a mechanism known as the meridional overturning circulation (MOC) (Gordon, 1986; Schmitz, 1996, see Figures I-90 and I-91). Because of its capacity to bring deep water closer to the surface, and surface water to depths, the Southern Ocean forms an important pathway in the global transport of heat. Although there is no observational evidence at present, (WG II AR5, 30.3.1, Hoegh-Guldberg, 2014) model studies indicate with a high degree of confidence that the Southern Ocean will become more stratified, weakening the surface-to-bottom connection that is the hallmark of present-day Southern Ocean circulation (WG I AR5 12.7.4.3, Collins et al., 2013). A similar change is anticipated in the Arctic Ocean and subarctic seas (WG I AR5 12.7.4.3, Collins et al., 2013), another region with this type of vertical connection between ocean levels (Wüst, 1928). These changes will result in fresher, warmer surface ocean waters in the polar and subpolar regions (WGII AR5 30.3.1, Hoegh-Guldberg, 2014; WG I AR5 12.7.4.3, Collins et al., 2013), significantly altering their chemistry and ecosystems." ]

[ "The composition of estuarine fish fauna is dynamic and complex. Despite the variation in fish fauna in estuaries, it is possible to observe some species associated with microhabitats. The assemblage composition of these communities is apparently derived from habitat selection. The aim of this study was to assess the structure of the demersal fish fauna of the Paranaguá Bay and its relationship with biotic and abiotic factors. To this end, monthly collections were conducted using an otter trawl, from October 1999 to September 2000, at five sites in the shallow infralittoral. Biotic (organic matter, and invertebrates) and abiotic factors (salinity, temperature, pH, dissolved oxygen, seston, and nutrients) were recorded during sampling. A total of 6,623 individuals were captured, belonging to 2 species of Chondrichthyes and 53 species of Actinopterygii (26 families). Sciaenidae was the most representative in terms of richness, with 11 species, and Ariidae was the most representative in terms of abundance. The catfish Cathorops spixii was the most abundant species, representing 21 % of the entire catch. There were significant differences in the composition and abundance of the fish fauna among the studied areas, as evidenced by the Shannon-Wiener diversity index. Such differences seem to be related to the complexity of habitats, which occur due to different types of bottom cover found at each sampling site. The abiotic variables indicated little influence on the structure of the fish assembly. These results contribute to a better understanding of the fish fauna from the shallow infralittoral areas of the Paranaguá Bay, and provide data to decision makers for better implementation of management and conservation measures." ]

[ "A1533" ]

[ "Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.", "Given the importance of copepods in pelagic food webs, short- and medium-scale temporal variation in the distribution and abundance of copepods of the genus Pseudodiaptomus was investigated in an oligo-mesohaline estuary (Paracauari) in northern Brazil. This system is characterized by high local hydrodynamics and nutrient input from the Paracauari River and Marajo Bay, and marked seasonal variation in rainfall levels. The temporal variation in the abundance of copepods was analyzed in the context of some hydrological variables tide height, salinity, temperature, pH, and concentrations of suspended particulate material, dissolved oxygen and chlorophylla. Samples were collected in 2009 at a fixed station (00° 44'15.4 '' S, 48° 31'07.5 '' W) every 3 hours during a nycthemeral cycle in the neap and spring tides of February, May, June, August, November, and December. Zooplankton samples were collected using horizontal hauls of plankton nets with a 120 pm mesh. Following identification, the abundance and density of Pseudodiaptomus copepods were determined. Data were analyzed using an ANOVA (to assess the significance of diurnal, fortnightly and seasonal variations), PCA, and Bray-Curtis similarity. Four species were identified: Pseudodiaptomus richardi, Pseudodiaptomus marshi, Pseudodiaptomus gracilis, and Pseudodiaptomus acutus. The results indicate that variation in composition and density of the Pseudodiaptomidae copepods in the Paracauari estuary is determined by the interactive effect of the freshwater influx from Marajo Bay, tides, and the rainfall regimen, which modulate local salinity. The absence of diurnal variation in species composition and density was determined by the high local hydrodynamics, which provoke the constant mixing of the estuary's water.", "Loliginid squids constitute marine resources of increasing importance in shelf ecosystems off the coast of South Brazil. However, the existing information and knowledge about the occurrence of early-life stages and causes of distributional patterns are insufficient. Here, we have revisited Brazilian historical plankton samples obtained from 11 oceanographic surveys to identify paralarvae and their abundances over time. The study area and time period cover the region between Cabo de São Tomé (22°S) and Cananéia (25°S) at depths down to 200 m from 1991 to 2005. Of the 246 paralarvae quantified, ~50% were identified to the genus or species level, including Doryteuthis spp. (D. sanpaulensis and D. plei), Lolliguncula brevis and a single specimen of Pickfordiateuthis pulchella. Paralarval occurrence and abundance peaked in different areas and were associated with distinct oceanographic conditions: D. sanpaulensis occurred in the northern region associated with cold waters and upwelling events, D. plei occurred primarily in the southern region of the study area and in warmer waters, and L. brevis was found in shallow and low salinity waters in the estuarine region off the coast of Santos. Overall, the highest abundance of paralarvae occurred in the nearshore, northernmost areas during summer, and this can be associated with the observed retention mechanisms caused by local circulation, seasonal upwelling, the intrusion of nutrient-rich waters, and spawning peaks. The present study provides new information and evidence for loliginid patterns in the area that may potentially be useful for better understanding the recruitment patterns and fishery assessments of squid populations.", "Farfantepenaeus brasiliensis and F. paulensis are the most exploited shrimps of SE-S Brazilian coast. Our aim was to verify if adjacent nursery areas with different environmental condition (Sepetiba and Guanabara bays, SE Brazil) influence on shrimp populations (eg, CPUE) and body shapes. Samplings were carried out during 12 months in those bays ca. 85 Km far from each other. Carapace length (CL), total body length (TL), wet weight, abdomen size and TL/CL ratio were used to analyze variations in shape through regressions. In general, F. brasiliensis was 4 to 6 times more abundant than F. paulensis. The sex ratio differed from 1:1 in F. brasiliensis in both bays, with dominance of females, largest catches occur in autumn. However, differences in size and morphology were found between bays, mainly regarding the TL/CL ratio. Shrimps in Sepetiba Bay have higher TL/CL showing a more “elongated shape” (larger abdomen) when compared to those from Guanabara Bay. Results suggest the existence of an estuary vs shrimp morphology relationship which results in differences in body shape even in spatially close areas. TL/CL ratio has proven useful for assessing shrimp populations differences and might be tested for tracking the origin of adult shrimps stocks at the coast.", "This study describes the spatial and temporal patterns of changes in the macrobenthic communities of Guajará Bay, an estuary in northern Brazil. Samples were collected at seven sites in the dry (December 2004 and September 2005) and rainy seasons (March and June 2005). On each occasion, four biological samples and one sediment sample were collected at each site using a Petersen grab (0.039 m2). Simultaneously, the pH of the surface water, salinity, electrical conductivity and temperature were measured. Water parameters, except temperature, showed strong seasonal variation. As a general rule, pH, salinity and electrical conductivity were higher in the dry season and increased toward the mouth of the estuary. Sediment characteristics varied little in space or time. Almost 99% of all the specimens collected were annelids. The abundance and diversity of the organisms were significantly higher in the rainy season, when there was a marked increase in the abundance of oligochaetes and insect larvae, whereas polychaetes predominated during the dry season. The results of the ANOSIM indicated significant differences in the composition of the macrofaunal communities between seasons. The groups formed by the CCA reflected the distance from the mouth of the estuary. At the innermost sites, characterized by lower electrical conductivity and rich, organic sandy sediments, oligochaetes predominated, whereas at the sites further downstream, where more saline conditions predominate, polychaetes were found in higher densities. The results indicated that the structure of the macrobenthic communities in this estuarine bay are structured primarily by salinity, and secondarily by seasonal changes in rainfall rates, which affect the characteristics of both the water and sediments.", "Aim: The disjunct distributions of freshwater organisms along coastal drainages are usually explained by palaeodrainages formed during sea-level retreats that connected currently isolated basins, or by river capture from tectonic adjustments between adjoining watersheds. We evaluate the relative importance of these events on the genetic variation of freshwater fishes inhabiting the Serra do Mar in eastern Brazil, a region with steep mountains and pronounced bays. Location: Coastal river drainages in southeastern Brazil. Taxon: Catfishes of the Trichomycterus alternatus group. Methods: We tested the effects of palaeolandscape connections (GIS-reconstructed palaeodrainages and putative river captures) on the genetic structure (mitochondrial and nuclear markers) of T. alternatus from 15 drainages using phylogenetic reconstructions, lineage delimitation methods and analyses of molecular variance. Results: Trichomycterus alternatus is monophyletic and comprised of three main lineages: two restricted to the basin at its northernmost distribution and another broadly distributed to the south. In the latter, seven major cytb clades were geographically compatible with the eight palaeodrainages, with three incongruences matching river captures previously described for the Guanabara Bay (GB). Shared haplotypes among isolated rivers flowing into GB provide the first molecular evidence of the ‘Rio de Janeiro’ palaeoriver. Main conclusions: Dispersal via palaeorivers is an important process, but it is not enough to recover the most recent dispersive events. Therefore, integrating both palaeo-riverine configuration (GIS-based) and localized river captures (geological studies) is crucial to reveal the role of past geological and climatic events on the distribution of freshwater organisms. Taken together, these two factors significantly explained a high portion T. alternatus genetic structure along coastal drainages, revealing a palaeolandscape scenario that may have been used by other freshwater Atlantic Forest taxa.", "While environmental drivers regulate the structure of mangrove microbial communities, their exact nature and the extent of their influence require further elucidation. By means of 16S rRNA gene-based sequencing, we determined the microbial taxonomic profiles of mangroves in the subtropical Paranaguá Bay, Brazil, considering as potential drivers: salinity, as represented by two sectors in the extremes of a salinity gradient (30 PSU); proximity to/absence of the prevailing plants, Avicennia schaueriana, Laguncularia racemosa, Rhizophora mangle, and Spartina alterniflora; and the chemical composition of the sediments. Salinity levels within the estuary had the strongest influence on microbial structure, and pH was important to separate two communities within the high salinity environment. About one fourth of the total variation in community structure resulted from covariation of salinity and the overall chemical composition, which might indicate that the chemical profile was also related to salinity. The most prevalent bacterial phyla associated with the mangrove soils analyzed included Proteobacteria, Actinobacteria, Chloroflexi, Bacteroidetes, Acidobacteria, and Cyanobacteria. Taxonomic and functional comparisons of our results for whole-genome sequencing with available data from other biomes showed that the studied microbiomes cluster first according to biome type, then to matrix type and salinity status. Metabolic functions were more conserved than organisms within mangroves and across all biomes, indicating that core functions are preserved in any of the given conditions regardless of the specific organisms harboring them.", "Here palynological assemblages are presented from channel surface sediment samples from the Caceribu, Guaraí and Guapimirim-Macacú rivers located in an important area of the Brazilian coast (Guanabara Bay, State of Rio de Janeiro), in order to provide information relevant for the interpretation of palaeoecological records. The data indicate the predominance of pollen types from the Atlantic Forest in all samples and a relatively low representation of mangrove pollen, suggesting distant (regional) fluvial transport. Avicennia and Rhizophora were represented in those samples closer to the intertidal zone, Rhizophora being the most important. It was possible to verify a marked difference in pollen concentration/deposition among the three rivers, probably related to the different hydrodynamic pattern of each river. A low concentration of palynomorphs occurred in the Macacú-Guapimirim River, resulting from its higher flow, and there was a high deposition of palynomorphs in the sediments of Guaraí River, in response to its isolation from the hydrographic Guanabara Bay basin. It was possible to verify other interesting data, such as low palynomorph concentration in samples from near the mouth and an increase of palynomorphs in the upstream samples, mainly due to the more active action of the tidal currents. Meanwhile, the increase in the total concentration of the palynomorphs in the upstream samples coincides with the maximum reach of the saline waters and their meeting with the internal flow of the rivers.", "The assemblage and functional structure of the fish fauna of the Maracaípe River, municipality of Ipojuca - PE, was characterized by monthly beach trawls carried out from March of 2012 to February of 2013. A beach trawl net (picaré) was used at three different points of the estuary (EST 1, EST 2 and EST 3) during day and night trawls. The captured specimens were measured and weighed in the laboratory, identified and separated into use and trophic guilds using appropriate literature. Abiotic variables (temperature, salinity, dissolved oxygen, pH, turbidity and chlorophyll-a) were analyzed as for differences between day periods (night and day) and seasons (dry and rainy), and correlated to fish abundance. No difference was detected between day periods (p>0.07 for all variables), but they differed between seasons for most variables (p?0.02), and between sampling points only for dissolved oxygen (p=0.03). In one year of collection, 11,513 specimens were captured, belonging to 92 species, 38 families and 15 orders. Gerreidae, Atherinopsidae, Clupeidae, Gobiidae and Hemiramphidae were responsible for 82.9% of the total abundance. The estuary of the Maracaípe River presents a rich ichthyofauna, but with the quantitative predominance of seven species (Atherinella brasiliensis, Eucinostomus argenteus, E. melanopterus, Ulaema lefroyi, Lile piquitinga, Ctenogobius boleosoma and Hyporhamphus unifasciatus). In the estuary, six species classified as vulnerable on the IUCN Endangered Species List were reported. The estuary presents a high diversity of species, most of them marine, carnivorous, and opportunistic, showing the high resilience of this environment. The predominance of juvenile fish underscores the importance of the Maracaípe River estuary for the maintenance of population stocks of coastal species, demonstrating the urgent demand of management of this environment.", "In January 2000, Guanabara Bay in Rio de Janeiro experienced a major oil spilling caused by a break down in one PETROBRAS oil pipeline. Over than 1.3 tons of fuel oil escaped into the bay water in the northern region. Studies of foraminiferal taphonomic assemblages in sediment samples collected on three periods in the same stations, before and after the spilling, were important for the pollution impact evaluation during eight years. In 2005, in the north region, TOC values were higher than in 1999. It was observed the increase of test abnormalities, corrosion and dwarfism. Abundance and species richness reduced in 2005 and increased in 2008 but they did not reach the 1999 levels. Trends of dominant species confirmed the increase of pollution values in 2005: Abundance of A. tepida increased while B. elegantissima reduced. In 2008 there was an increase in the species richness with the occurrence of agglutinated species." ]

[ "Production and species Aquaculture is expanding faster than other types of food production, although no longer at the growth rates of the 1980s and 1990s (11.3 and 10.0 per cent, respectively, excluding aquatic plants). Average annual growth declined to 5.8 per cent during the period from 2000 to 2016, although higher rates of growth occurred in several countries, in particular in Africa, from 2006 to 2010 (Food and Agriculture Organization of the United Nations (FAO), 2018a). Global production in 2016 included 80 million tons of food fishes, 30.1 million tons of aquatic plants and 37,900 tons of non-food products. Food production included 54.1 million tons of finfishes, 17.1 million tons of molluscs, 7.9 million tons of crustaceans and 938,500 tons of other animals. China, the major aquaculture producer in 2016, has produced more than the rest of the world combined since 1991. The other major producers in 2016 were India, Indonesia, Viet Nam, Bangladesh, Egypt and Norway. Aquatic plants (28 million tons) included seaweeds and a much smaller volume of microalgae. China and Indonesia were the major producers of aquatic plants in 2016 (FAO, 2018b). Ornamental fish and plant species are not included in the present review. People and nutrition Global official statistics indicate that 59.6 million people were engaged in the primary sector of capture fisheries and aquaculture in 2016, with 19.3 million people engaged in aquaculture and 40.3 million in fisheries (FAO, 2018b). In addition to the primary producers, many people are engaged in the aquaculture value chain. The sector supports the livelihoods, including family members, of 540 million people, or 8 per cent of the world population (FAO, 2017a). Women accounted for 19 percent of all people directly engaged in the primary sector in 2014 (FAO, 2016). Aquaculture’s contribution to human nutrition has been fully recognized (Chan and others, 2017; High-Level Panel of Experts on Food Security and Nutrition, 2014). Aquaculture improves the nutrition of the rural poor, especially mothers and young children (Thilsted and others, 2016), although there are concerns that the growth of the sector and the intensification of its production methods may result in decreased availability of certain fatty acids and micronutrients (Bogard and others, 2017). Considering the increasing global population and the importance of a healthy diet, Béné and others (2016) stressed that access to fish is a key issue in creating healthy populations, especially among the rural poor, worldwide." ]

[ "B2454" ]

[ "Global aquaculture production in 2017 (animals and plants) was recorded as 111.9 million tons, with an estimated firstsale value of $249.6 billion. Since 2000, world aquaculture has ceased to enjoy the high annual growth rates of the 1980s and 1990s (11.3 and 10.0 per cent, respectively). Nevertheless, it continues to grow at a faster rate than other major food production sectors. Annual growth declined to a moderate 5.8 per cent during the period from 2000 to 2016, although double-digit growth still occurred in a small number of countries, in particular in Africa, from 2006 to 2010. Fish produced by this rapidly growing sector is high in protein and contains essential micronutrients, sometimes essential fatty acids, which cannot easily be substituted by other food commodities. The United Nations predicts that the global population will reach 8.5 billion in 2030. This will inevitably increase the pressure on food sectors to increase production and reduce losses and waste. Production increases must be able to ensure sustainability, given a context in which key resources, such as land and water, are likely to be scarcer and the impact of climatic change will intensify. The aquaculture sector is no exception. Success in achieving the long-term goal of economic, social and environmental sustainability of the aquaculture sector, so as to ensure its continued contribution of nutritious food to keep the world healthy, will depend primarily on continued commitments by Governments to provide and support a good governance framework for the sector. As the sector further expands, intensifies and diversifies, it should recognize relevant environmental and social concerns and make conscious efforts to address them in a transparent manner, backed by scientific advice.", "Ocean resources provide the basis for the livelihoods of millions of people across the globe, as well as a range of critical ecosystem services, including oxygen production and carbon storage, several biodiversity-related services, such as the harvesting of living resources, coastal protection and genetic resources (Mohammed, 2012) and cultural and amenity services (Whitmarsh, 2011). The most commonly valued services are tourism and recreation, as well as storm protection (Mehvar and others, 2018). Fisheries alone provide multiple benefits to millions of people, including those living in poverty in the coastal communities of low-income countries. Fishes and other seafood are a major source of food, protein and micronutrients for many vulnerable communities. It is estimated that, in 2016, 59.6 million people were employed in the primary sector of capture fisheries and aquaculture, with a great majority in low-income countries (although that figure includes some inland activities). With the addition of those who work in associated processing, marketing, distribution and supply industries, it is estimated that fisheries and aquaculture support nearly 250 million livelihoods (Food and Agriculture Organization of the United Nations (FAO), 2018). Benefits from marine and coastal ecosystems can be categorized in several ways. Traditionally, they have been understood in terms of goods (i.e., products, resources and harvests from nature with a market value), services (i.e., processes that sustain all forms of life but do not have a market value) and cultural benefits (i.e., spiritual and religious heritage, with no explicit market value). While goods have a direct use (consumptive) value, determined through market prices, services and cultural benefits have an indirect use (non-consumptive) value that can be determined through the application of a variety of valuation techniques (see figure). Provisioning services of marine and coastal ecosystems The ocean provides a multitude of direct and indirect benefits of value to humans. The most direct benefit that marine and coastal ecosystems provide is through their primary productivity and the resulting products, such as fishes, plants, animals, fuel, timber (e.g., mangroves), biochemicals, natural medicines, pharmaceuticals, raw materials (sand and corals) and, to a lesser extent, fresh water and fibre. In 2016, 79.3 million tons of marine fishes2 were caught, and 28.7 million tons of marine aquaculture species were farmed, supplying together an average of 14.6 kg of seafood per person on earth (FAO, 2018). Seafood is essential for food security: it provides more than 20 per cent of the average per capita animal protein intake for 3 billion people, and more than 50 per cent in some developing countries (FAO, 2018).", "The rapid growth of intensive aquaculture, in some cases not well planned, has caused concern about environmental impact, human health and social issues. Although the lion’s share of production originates in Asia, opposition to aquaculture development is strongest in some developed countries (Froehlich and others, 2017), where aquaculture is still a relatively new industry competing with well-established activities. The world’s knowledge regarding the impact of climate change on aquaculture needs to be improved. Further research and investigation is necessary to improve seeds, feeds and health management. The increasing dependence of developed countries on farmed seafood imports from developing countries and insecurity regarding product environmental, social and safety credentials have sparked considerable public debate. Scientific uncertainties and conflicting information on the issues relating to seafood consumption have further confused the public. The establishment and application of third-party certification systems, covering the environmental, social and food safety concerns related to seafood, have begun to ease this situation. More research is needed to communicate the nutritional and health benefits of increased consumption of seafood. Determination of the nutritional profiles of cultured fishes and wild-caught products and quantification of the health benefits of socioeconomic improvements through aquaculture need further attention. With a growing world population, annual supply from the aquaculture sector must surpass supply from capture fisheries and reach 62 per cent in 2030 in order to maintain current consumption levels. This presents tremendous challenges to the sector, to policymakers and to the aquaculture community at large. Improving perceptions will be instrumental in achieving this goal (Vannuccini and others, 2018). Better information and exchange thereof would help in allaying concerns, dispelling myths and resolving ambiguities. To improve public awareness of aquaculture, the industry needs a more open, broader dialogue that will increase transparency. To communicate the benefits of aquaculture more effectively, it must collaborate more with stakeholder groups viewed as credible by the public. While significant social and environmental issues are still to be addressed, it is important to put aquaculture in a wider perspective by comparing its costs and benefits with those of other animal production systems and with its potential contribution to sustainable food security, given forecasted demographic pressures. However, a holistic view, with a balanced evaluation of the risks and benefits of aquaculture, has been lacking, thus impeding the development of policies that reflect production realities (Bacher, 2015).", "Inputs and resources Land and water are the most important resources for aquaculture development. Gentry and others (2017) estimated that 11,400,000 km2 of coastline are suitable for fishes, and more than 1,500,000 km2 could be developed for bivalves. The challenge is to secure suitable land and water resources for the development of aquaculture at the national level. Good quality seeds and optimal feeds are essential. Most animal species are cultured with external feeds, and feeding the ever-expanding aquaculture sector has been a concern. In 2016, about 55.6 million tons of farmed fishes (including Indian carps) and crustaceans depended on external feeds (composed of fresh ingredients, farm-made or commercially manufactured) (FAO, 2018b). In 2005, aquaculture consumed about 4.2 million tons of fishmeal (18.5 per cent of total aquafeeds by weight). By 2015, this had been reduced to 3.35 million tons (7 per cent of total aquafeeds by weight). Even with increasing production globally, the use of fishmeal for aquafeeds will decrease further to 3.33 million tons by 2020 (5 per cent of total aquafeeds by weight for that year). Efforts towards making sustainable feeds by replacing fishmeal and fish oils with plant-based feed can have an impact on levels of omega-3 fatty acids and the nutritional value of farmed fishes. The industry can make strategic use of fish oils in fish feed by feeding these essential compounds to farmed fishes at key life stages. Nevertheless, for aquaculture to grow, aquafeed production is expected to continue growing at a similar rate, to 69 million tons by 2020 (Hasan, 2017). Considering past trends and predictions, aquaculture sustainability is more likely to be closely linked with the sustained supply of terrestrial animal and plant proteins, oils and carbohydrate sources for aquafeeds (Troell and others, 2014). The aquaculture sector should therefore strive to ensure sustainable supplies of terrestrial and plant-based feed ingredients, including algae and processing waste, that do not compete directly with use for feeding people directly.", "Many countries emphasize environmental sustainability and social responsibility. In addition to laws, regulations and voluntary codes aimed at ensuring environmental integrity, some of the means of achieving this goal include innovative, less polluting techniques proposed by the ecosystem approach to aquaculture, which emphasizes management for sustainability (FAO, 2010) and provides a planning and management framework to effectively integrate aquaculture into local planning (Brugère and others, 2018). Although efforts related to intensification have resulted in decreased use of land and fresh water per unit of fish produced (FAO, 2017a), they have also led to an increase in the use of energy and feed, and in pollution, per unit of farmed fish (Hall and others, 2011). Although aquaculture has been accused of having negative environmental and social impacts (Bushmann and Fortt, 2005; Isla Molleda and others, 2016) and suffers from a biased perception on the part of the public, it has, from an ecological efficiency and environmental impact point of view, clear benefits over other forms of animal food production for human consumption. Life-cycle assessment is useful to determine environmental impacts and ensure environmentally sustainable development (Bohnes and Laurent, 2019). Farmed finfish is similar in feed conversion efficiency to poultry and much more efficient than beef. Recent estimates indicate that demand for feed crops and land for aquaculture will be less than for alternative food production systems, even if over one third of protein production comes from aquaculture, by 2050 (Froehlich and others, 2018). Filter-feeding carps and molluscs are even more efficient producers of animal protein, as they require no human-managed feeds and can improve water quality. Because aquaculture is relatively new, it offers great scope for innovation to increase resource efficiency (Waite and others, 2014). Where resources are stretched, the relative benefits of policies that promote aquaculture over other forms of livestock production should be considered. In general, the environmental performance of aquaculture has improved significantly over the past decade. If aquaculture production doubles by 2030, the sector must improve its productivity and environmental performance for growth to be sustainable (Waite and others, 2014). In order to achieve “sustainable intensification”, aquaculture must: (a) advance socioeconomic development; (b) provide safe, affordable and nutritious food; (c) increase production of fish relative to the amount of land, water, feed and energy used; and (d) minimize environmental impacts, fish diseases and escapes (FAO, 2017a).", "Distribution of ocean benefits and disbenefits Developments in employment and income from fisheries and aquaculture The global harvest of marine capture fisheries has expanded rapidly since the early 1950s and is currently estimated to be about 80 million tons a year. That harvest is estimated to have a first (gross) value on the order of 113 billion dollars. Although it is difficult to produce accurate employment statistics, estimates using a fairly narrow definition of employment have put the figure of those employed in fisheries and aquaculture at 58.3 million people (4.4 per cent of the estimated total of economically active people), of which 84 per cent are in Asia and 10 per cent in Africa. Women are estimated to account for more than 15 per cent of people employed in the fishery sector. Other estimates, probably taking into account a wider definition of employment, suggest that capture fisheries provide direct and indirect employment for at least 120 million persons worldwide. Small-scale fisheries employ more than 90 per cent of the world’s capture fishermen and fish workers, about half of whom are women. When all dependants of those taking full- or part-time employment in the full value chain and support industries (boatbuilding, gear construction, etc.) of fisheries and aquaculture are included, one estimate concludes that between 660 and 820 million persons have some economic or livelihood dependence on fish capture and culture and the subsequent direct value chain. No sound information appears to be available on the levels of death and injury of those engaged in capture fishing or aquaculture, but capture fishing is commonly characterized as a dangerous occupation. Over time, a striking shift has occurred in the operation and location of capture fisheries. In the 1950s, capture fisheries were largely undertaken by developed fishing States. Since then, developing countries have increased their share. As a broad illustration, in the 1950s, the southern hemisphere accounted for no more than 8 per cent of landed values. By the last decade, the southern hemisphere’s share had risen to 20 per cent. In 2012, international trade represented 37 per cent of the total fish production in value, with a total export value of 129 billion dollars, of which 70 billion dollars (58 per cent) was exports by developing countries. Aquaculture is responsible for the bulk of the production of seaweeds. Worldwide, reports show that 24.9 million tons was produced in 2012, valued at about 6 billion dollars. In addition, about 1 million tons of wild seaweed were harvested. Few data were found on international trade in seaweeds, but their culture is concentrated in countries where consumption of seaweeds is high.", "The major growth in aquatic production is expected to come from aquaculture and is projected to reach 109 million tons in 2030, an increase of 37 per cent over 2016 levels. However, it is estimated that the annual growth rate of aquaculture will slow from 5.7 per cent in the period from 2003 to 2016 to 2.1 per cent in the period from 2017 to 2030, mainly because of a reduced rate of growth in Chinese production, offset in part by an increase in production in other countries (FAO, 2018a). The share of farmed aquatic animal species in global fishery production (for food and non-food uses), which was 47 per cent in 2016, is projected to exceed that of wild species in 2020 and to grow to 54 per cent by 2030. Over 87 per cent of the increase in aquaculture production in 2030 will come from Asian countries. Asia will continue to dominate world aquaculture production, contributing 89 per cent of total production in 2030. China will remain the world’s leading producer, but its share of total production will decrease from 62 per cent in 2016 to 59 per cent in 2030. Production is projected to continue to expand on all continents, with variations in the range of species and products across countries and regions (World Bank, 2013). Millions of people engaged in fisheries and aquaculture are struggling to maintain reasonable livelihoods. These are the people who are most vulnerable to certain climate change impacts, such as extreme weather conditions, storms, floods and rising sea levels, and particular attention needs to be paid to them when designing adaptation measures if the sector is to continue to contribute to meeting the global goals of poverty reduction and food security (FAO, 2018a).", "The importance of fishes and fishery-based activities to food security in less developed countries is particularly prominent. In 2016, Asia accounted for 85.7 per cent of the global population engaged in fisheries and aquaculture (FAO, 2018a), which represents an increase of more than 1 per cent since 2014. More than 19 million people (32 per cent of all people employed in the sector) were engaged in fish farming, and 95.9 per cent of all aquaculture activities were being conducted in Asia. The statistics clearly indicate the important and increasing contribution of aquaculture to that continent’s regional food and nutrition security, as well as its socioeconomic development. There are several major reviews on the subject (Allison, 2011; Béné and others, 2016). Fishes provide more than 4.5 billion people with at least 15 per cent of their animal protein intake. The nutritional properties of fishes make them important to the health of consumers in developed and developing countries. Fishes are efficient converters of feed into high quality food and their carbon footprint is lower than that of other animal production systems. Fisheries and aquaculture value chains contribute substantially to the income and employment, and therefore indirectly to the food security, of more than 10 per cent of the world’s population, principally in developing countries and emerging economies (FAO, 2017a). The 80 million tons of aquatic animals produced in 2016 contributed 46 per cent to total aquatic animal production and a little over 54 per cent to total fish consumption in the same year. Per capita food fish consumption was estimated at 20.3 kg in 2016, compared with 19.5 kg in 2013 (FAO, 2018b). An estimated 18.7 million people were employed in aquaculture in 2015 (FAO, 2017a). The culture and use of small indigenous fish species with high nutritional value in human nutrition is recognized and is being practised (Castine and others, 2017). However, with the intensification of aquaculture production methods, and with the increasing use of plant-based feedstuffs, care must be taken to ensure that the nutrient contents of farmed aquatic animal products are as high as possible (Beveridge and others, 2013; Bogard and others, 2017).", "The importance of fishes and fishery-based activities to food security in less developed countries is particularly prominent. In 2016, Asia accounted for 85.7 per cent of the global population engaged in fisheries and aquaculture (FAO, 2018a),which represents an increase of more than 1 per cent since 2014. More than 19 million people (32 per cent of all people employed in the sector) were engaged in fish farming, and 95.9 per cent of all aquaculture activities were being conducted in Asia. The statistics clearly indicate the important and increasing contribution of aquaculture to that continent’s regional food and nutrition security, as well as its socioeconomic development. There are several major reviews on the subject (Allison, 2011; Béné and others, 2016). Fishes provide more than 4.5 billion people with at least 15 per cent of their animal protein intake. The nutritional properties of fishes make them important to the health of consumers in developed and developing countries. Fishes are efficient converters of feed into high quality food and their carbon footprint is lower than that of other animal production systems. Fisheries and aquaculture value chains contribute substantially to the income and employment, and therefore indirectly to the food security, of more than 10 per cent of the world’s population, principally in developing countries and emerging economies (FAO, 2017a). The 80 million tons of aquatic animals produced in 2016 contributed 46 per cent to total aquatic animal production and a little over 54 per cent to total fish consumption in the same year. Per capita food fish consumption was estimated at 20.3 kg in 2016, compared with 19.5 kg in 2013 (FAO, 2018b). An estimated 18.7 million people were employed in aquaculture in 2015 (FAO, 2017a). The culture and use of small indigenous fish species with high nutritional value in human nutrition is recognized and is being practised (Castine and others, 2017). However, with the intensification of aquaculture production methods, and with the increasing use of plant-based feedstuffs, care must be taken to ensure that the nutrient contents of farmed aquatic animal products are as high as possible (Beveridge and others, 2013; Bogard and others, 2017).", "Humanity has always drawn sustenance from the ocean through fishing, harvesting and trade. Today 44 per cent of the world's population lives on or within 150 kilometres from the coast (United Nations Atlas of Oceans). However this fundamental connection between nature and people has only very recently been incorporated into trans-disciplinary thinking on how we manage and account for the human benefits we get from nature. Today, when a product taken from an ecosystem1 , for example, fibres, timber or fish, enters the economic cycle (i.e., a part of the human system), it receives a monetary value that accounts at least for the costs associated with its extraction and mobilization. If that natural product is the result of cultivation, as in the case of agriculture, forestry and aquaculture, the monetary value also includes the production costs. However, the extraction of natural products and other human benefits from ecosystems has implicit costs of production and other ancillary costs associated with preserving the integrity of the natural production system itself. Traditionally these benefits and costs have been hidden within the “natural system,” and are not accounted for financially; such hidden costs and benefits are considered “externalities” by neoclassical economists. While the neoclassical economic toolbox includes non-market valuation approaches, an ecosystem services approach emphasizes that ‘price’ is not equal to “value” and highlights human well-being, as a normative goal. The emergence and evolution of the ecosystem services concept offers an explicit attempt to better capture and reflect these hidden or unaccounted benefits and associated costs when the natural “production” system is negatively affected by human activities. The ecosystem services approach has proven to be very useful in the management of multi-sector processes and already informs many management and regulatory processes around the world (e.g. United Kingdom National Ecosystem Assessment, 2011)." ]

[ "Petrobras announced a \"giant\" discovery in the northern part of Campos Basin, of at least an estimated recoverable 0.6 billion bbl of heavy oil. The reservoir, about 80 km offshore, was initially discovered in January 2001. The country's last major find, the 3 billion bbl, ultra-deep-water Roncador field, was made by Petrobras in 1996." ]

[ "A1226" ]

[ "Campos Basin, the main production province in Brazil, was discovered in 1974. It is located on the North coast of the Rio de Janeiro State and comprises an area of around 115,000 km2 (28,400 acres), as shown in Figure 1. The producing oil fields are between 70 and 150 km (43 to 93 miles) far from the seashore. It started its production on August 13th, 1977 with 10,000 bopd (barrels of oil per day) from the well 1-EN-01-RJS, which produced to a semi-submersible platform; this well has produced nearly 35 million barrels of oil until February 1998, when it was shutdown for economical reasons. Today, after more than twenty-five years of continuous operation, the overall production system comprises 13 fixed platforms and 24 Floating Systems distributed among 42 oil fields, which account for the production of 1.21 million bopd - which corresponds to more than 80% of Petrobras oil production, plus 18.9 million m3 of gas per day - or 43% of the gas production (as of December 2002). Such an evolution was supported by investments in exploration and production development, in deepwater technology developments and in continuous management improvement. This paper describes the main driving forces to exploit Campos Basin - especially its deep and ultra-deepwaters fields, the technological and production developments performed, the experience accumulated by Petrobras along these 25 years of operations as well as its contribution to the global oil industry.", "The Campos Basin (100,000 km2) is located on the continental shelf of southeastern Brazil. Despite the significant oil and gas industrial activities underway in the Campos Basin, scarce information is available regarding the hydrocarbon contents and microbial communities in the deep-sea sediments. To gain new insights on these aspects, we first obtained deep-sea sediment samples with different degrees of oil exposure. We obtained samples from a seabed fissure (N = 28), surroundings (250 m to 500 m from the fissure; N = 24), and a control area (N = 4). We used shotgun metagenomics to characterize the taxonomic and metabolic diversity and analyzed biogeochemical parameters (metal and oil concentration) of all samples. The high levels of unresolved complex mixture of hydrocarbons in the fissure indicate a potentially recent petrogenic contribution in these sediments. The fissure area was found to have a higher abundance of hydrocarbonoclastic bacterial genera and hydrocarbon degradation genes. These bacteria may be used as biosensors of sediment contamination. The effects of oil contamination, mainly around the fissure, are less clear at 250 m and 500 m, suggesting that the surroundings may not have been heavily affected by the oil leakage. Our study demonstrates that metagenomics can disclose biosensors for environmental monitoring.", "The Campos basin is a sedimentary basin located in offshore Brazil, between the north coast of Rio de Janeiro State and the south coast of Espírito Santo State, encompassing many oilfields. Most of the reservoirs in the basin are high-permeability sandstones containing low API gravity oil but are without strong water drives. Long horizontal producer wells are the best economic option for field development but require water injection to maintain reservoir pressure. Horizontal sections generally range from 1000 to 2000m, which demands gravel pack as a sand control method. Gravel packing such long wells is a challenge and requires thoughtful engineering to optimize pumping techniques and technology. Presented here are best practices to overcome several challenges faced in this field to achieve overall success. The challenge for extended-reach gravel packing is that the long horizontal section develops high friction during the alpha and beta wave propagation. Increasing the pumping pressure to overcome this friction increases the risk of fracturing the formation, consequently reducing the equivalent circulation rate downhole impairing the proppant transportation. In contrast, a reduced pump rate during alpha wave propagation can lead to a premature screenout due to the increase in dune height of over 85%. To overcome these issues and place gravel packs in these wells, careful engineering and simulation, lightweight proppants, friction reducers, and thorough job planning were used to successfully perform gravel packs in more than 40 horizontal wells completed in the Campos basin from 2011 up to 2017. The experience of pumping the longest gravel pack jobs in offshore Brazil (horizontal length more than 2,000m) offer insights into best practices for gravel packs in extended-reach horizontal wells: Design considerations, specific well challenges faced, technologies deployed, and operational planning requirements. Specifically, highlighting the benefits of using lightweight proppants and optimized fluid systems to minimize screen out risks and maximize pack efficiency.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "The Albacora field, located in Campos Basin, offshore Brazil, was discovered by PETROBRÁS in 1984. Following the discovery, a 7000Km 3-D survey was recorded, in the search for a better understanding of the field. At least three distinct families of reservoirs were identified in the area, ranging in age from Cretaceous (Albian-Cenomanian) to Miocene. The reservoirs are turbidites of two basic types: loose sands with a complex areal distribution, in the Tertiary accumulations; and more cemented sandstones, with a simpler distribution, in the Cretaceous accumulation. In a great part of the area, the reservoirs are interbedded with higher acoustic impedance rocks. The clear 3-D seismic definition of the reservoirs, as a rule, allows a detailed stratigraphic (as well as structural) interpretation. For the Oligocene and Miocene pools, seismic amplitude mapping, carried out in an interactive workstation, provided a surprisingly good picture of the turbidites distribution, considering the target depths (236D-2645m). Most well locations in the field, after the 3-D interpretation, were chosen with the help of the seismic amplitude maps. Special geologic features, such as channel facies and lobe-type deposits, were identified on the amplitude maps, and later confirmed by core and well log data interpretation.", "Petrobras increased its oil production capacity by 100,000 bpd following the start-up of operations at the Marlim Sul floating production, storage, and offloading vessel (FPSO), at the Marlim Sul field, in the Campos basin. Petrobras has leased the FPSO from the US' Single Buoy Moorings since January 2003. The new platform should start production at 20,000-25,000 bpd and reach full capacity by the end of 2004. Total output in the Campos basin averaged 1.2 million bpd of oil and NGL in the first 4 mo of 2004, equivalent to ~ 80% of the country's production. The FPSO is 110-km offshore Rio de Janeiro state and operates at water depths of 1160 m. Production from Marlim Sul averaged 151,000 bpd in 2003. Another platform, the 180,000-bpd P-51, is also planned for the Marlim Sul field and is due on stream in 2008.", "Pre-salt carbonate reservoirs are located offshore Brazil at Santos, Campos and Espírito Santo Basins, reaching depths up to 7000 m (22966 ft) and water depths of approximately 2200 m (7218 ft). Most of those reservoirs present very high permeability, resulting in extraordinary oil production rates, imposing, consequently, an onerous task on injector wells to maintain pressure and reservoir mass balance. Part of these injector wells are located in scenarios of inferior permo-porous characteristic and still have their injection rates limited in order to avoid fracture propagation in the reservoirs. To improve the geomechanical models, a series of field tests were carried out to estimate minimum in situ stress and fracture propagation pressure in both reservoir and cap rock. The tests results allowed a change in the criterion for definition of the maximum injection pressure in injector wells. The objective of this work is to present the tests results, how they were performed and the operational problems faced, always seeking the shortest rig time. These results favored the understanding of the reservoir and cap rock behavior.", "Exploration for oil under the salt layer is concentrated in the basins of Santos, Campos, and Espiritu Santo, Brazil. Hopefully it extends to the eastern margin of the Jequitinhonha and Camamu-Almada basins. These basins have been unexplored under the salt layer with respect to the present objectives. One Petrobras estimate is that there may be thousands of millions bbl of reserves of light petroleum under the salt in the Campos basin. Because of the urgency to import light oil to mix with heavy crude oil that is the major part of Brazilian production in the old Petrobras refineries and as a result of the immense oil discoveries of Tertiary/Cretaceous in the 1970's and 1980's and the first half of the 1990's, Brazilian exploration concentrates mainly in the reserves of the Tertiary and Cretaceous Superior of the Campos basin. Exploration under the salt layer in Campos and other basins has been sporadic. It is difficult to calculate the cost of developing the fields under the salt layer in Brazil but the costs could exceed any borne to date. If the layer under the salt becomes an object of commercial exploration, the development of the fields could reach $2,000 to $4,000 million or more. In the last 5 yr heavy lacustrian petroleum and gas accumulations have been found in the reservoirs of Tertiary and Cretaceous Superior in the Campos basin. These are formed mainly by biodegradation. As a result of this, giant deposits of petroleum/gas are expected under the Tertiary Superior and the Cretaceous of Marlim, Albacora, Roncador, Barracuda, Jubarte, Cachalote, Golfinho, and the petroleum accumulation BSS-69 and elsewhere. A number of historic and current oil and gas production figures are given for various Petrobras fields. In the Espírito Santobasin the potential reserves of light oil are about 600 MM boe, most of which in deep waters. Petrobras produces light oil in 87 fields 12 of which are maritime (as of 2005). Brazil produces up to 1.76 MM bpd of petroleum of which about 70% is heavy oil. The average production of gas has been 43.9 MM cu m/day as of September 2006. Probable reserves in Brazil are 11.36 B bbl of oil and 297 B cu m of gas.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Igneous rocks are widely developed in many hydrocarbon-bearing sedimentary basins in Brazil, and some igneous rocks play positive roles in the oil and gas accumulation process. But so far, no industrial oil or gas flow is discovered in igneous rocks in Brazilian onshore basins. At present, in some literatures published by some researchers, cases of igneous reservoirs in Brazil are inaccurate. The lithology of reservoirs in the Igarape Cuia oil and gas field, the oil and gas field of Urucu and the Barra Bonita gasfield, were previously thought to be volcanic rocks, but now are clastic rocks according to studies, and the igneous rocks in these three oil and gas field can only be acted as indirect and direct cap rocks. Furthermore, igneous rock reservoirs in the Campos Basin and Santos Basin in the Brazilian offshore are briefly analyzed. The representative Badejo oilfield in the Campos Basin has igneous rock reservoirs dominated by basalts which are intercalated with thin layers of volcaniclastic and sedimentary rocks, the storage space are vesicules, fractures and vugular pores, and the porosity of hydrocarbon bearing interval basalt reservoirs ranges from 10% to 15%. In addition, for the Santos Basin, igneous rocks in this basin are dominated by basic rocks, some alkaline intrusive rocks develop good micro spaces, mainly crystal moldic pores, inter- and intra-crystal dissolution pores and fractures, better reservoir intervals are often concentrated such as at sections near to unconformity surfaces and can have porosity of 6%–9% or higher; local pre-salt igneous rock reservoirs in the Santos Basin have the necessary conditions for hydrocarbon accumulation and it will be a new target layer for hydrocarbon exploration." ]

[ "Mangroves are productive ecosystems of tropical coastal landscapes, constituting habitat for many commercial fisheries, as the crab Ucides cordatus. In Brazil this crab holds a major socio-economic importance for artisanal fishery, but with obvious decline on their productivity. In this study we determined and mapped the more suitable mangrove areas for the conservation and fishery of this crab in the São Francisco River Estuary (Northeastern Brazil). We applied a Multi-Criteria Evaluation (MCE) in a GIS environment. Ten criteria in total were used, including crab biotic parameters, land use/cover and social factors. Maps of each criterion were produced by GIS techniques with CBERS and SPOT images and by field data. Mangroves more suitable for the conservation of U. cordatus (9.4 km2) are near to the river mouth, due to high density and frequency of non-commercial size crabs (NCSC), low density of commercial size crabs (CSC), small crabs and low degree of use for fishery. On the other hand, the mangroves for the crab fishery occurred with a similar area (10.2 km2) located farther away from the river mouth, with a high density and frequency of CSC, low density of NCSC, big crabs, medium-high degree of use for fishery and near to the villages. These information and thematic maps can aid government agencies in delineating extractive and fishery exclusion areas, thus contributing to the management plan for this species." ]

[ "A1297" ]

[ "In South America, Brazil is the country with the largest extension of mangroves, covering approximately 7000 km, departing from the Oiapoque River, on the border between Amapá and French Guiana, to Praia do Sonho, in Santa Catarina. With population growth, there was an expansion of cities towards the coast and with them the development of agriculture and aquaculture. With the advent of remote sensors, the changes detected over the years in the extensive area of ?mangroves in Brazil and in the world, have been studied and quantified. In this context, the objective of this work was to evaluate the transformations occurred in the mangrove in a semiarid climate estuary and to quantify the losses and gains of areas, influenced by both natural and anthropic action. The mangrove of the Coreaú River estuary has undergone small and significant transformations over the past 28 years (1985-2013). There was an increase of 3% (7.17 km²) in 2013 compared to 1985, these transformations consisted of a 55% gain in mangrove area, due to the addition of muddy sediment, development of mangrove forest and regeneration of mangrove forests after the deactivation of the shrimp farms, and 45% loss, corresponding 38% to the natural loss of muddy material, due to the growth of apicum area, influence of wind, rain, flow and tides, and loss of 7%, related to anthropic action, represented by the shrimp farm and salt pans, built along the estuary. From the processing of optical images it was possible to identify the share of influence of these transformations (natural and artificial) near the mangrove and in which intervals of years there were the biggest or smallest changes.", "Rare-earth elements have gained significant attention as they are currently widely used in high tech, chemical, and pharmaceutical industries. Here we used the fiddler crabs Leptuca leptodactyla as bioindicators to verify the presence of rare-earth elements in two mangrove areas of the Ubatuba, northern littoral of São Paulo state, Brazil. The specimens were collected in the mangrove areas of the Tavares River and Quiririm-Puruba river system, separated by season (dry and rainy). A total of 243 individuals were collected and analyzed. For determination and quantification of the elements we used the instrumental neutron activation analysis (INAA) technique. In both the dry and rainy season, the elements La, Ce, Sm, Eu, Tb, Yb and Sc were detected in samples of both mangroves, with La and Ce presenting higher concentrations. Samples from Tavares River mangrove had higher concentration levels of rare-earth elements than those of the Quiririm-Puruba river system. That is probably due to the central geographic position of the Tavares River in Ubatuba, which crosses a large portion of the city and receives a great amount of sewage. On the other hand, the Quiririm-Puruba river system has less anthropogenic inputs, thus, it receives much fewer rare-earth elements when compared to the Tavares River.", "While environmental drivers regulate the structure of mangrove microbial communities, their exact nature and the extent of their influence require further elucidation. By means of 16S rRNA gene-based sequencing, we determined the microbial taxonomic profiles of mangroves in the subtropical Paranaguá Bay, Brazil, considering as potential drivers: salinity, as represented by two sectors in the extremes of a salinity gradient (30 PSU); proximity to/absence of the prevailing plants, Avicennia schaueriana, Laguncularia racemosa, Rhizophora mangle, and Spartina alterniflora; and the chemical composition of the sediments. Salinity levels within the estuary had the strongest influence on microbial structure, and pH was important to separate two communities within the high salinity environment. About one fourth of the total variation in community structure resulted from covariation of salinity and the overall chemical composition, which might indicate that the chemical profile was also related to salinity. The most prevalent bacterial phyla associated with the mangrove soils analyzed included Proteobacteria, Actinobacteria, Chloroflexi, Bacteroidetes, Acidobacteria, and Cyanobacteria. Taxonomic and functional comparisons of our results for whole-genome sequencing with available data from other biomes showed that the studied microbiomes cluster first according to biome type, then to matrix type and salinity status. Metabolic functions were more conserved than organisms within mangroves and across all biomes, indicating that core functions are preserved in any of the given conditions regardless of the specific organisms harboring them.", "This study focuses on modeling water quality in mangroves areas including the effects of wetting and drying processes on the biogeochemistry of the mangrove. To achieve it, we use a shallow water hydrodynamics model capable ofpredicting both water quality and wetting and drying, which uses a rough-porous layer approach based on the water level. To evaluate the capabilities of the model, we consider an estuary region in Brazil to evaluate the model’s capabilities. The simulations carried out show the hydrodynamic behaviors and effects related to the water quality parameters in a complex tidal system comprised of extensive mangrove flats.", "The mixture of different water masses can strongly influence the marine reservoir effect (MRE) in localities under the effect of coastal marine upwelling. The Cabo Frio region, on the southeastern Brazilian coast, is well known for its seasonal marine upwelling and for its rich landscape of Holocene shellmounds. In this kind of archaeological settlement, common on the southern and southeastern Brazilian coasts, marine mollusk shells are frequently used for radiocarbon dating and can represent a valuable tool in the study of MRE. On the other hand, terrestrial mollusks have proven to be an important alternative to represent the atmospheric carbon isotopic concentration. In this work we analysed the most frequent terrestrial and marine mollusk shells from the Usiminas shellmound, on Cabo Frio Island. The radiocarbon signal of marine shells from Pinctada imbricata (Röding, 1798), Ostreidae (Rafinesque, 1815), Cymathium parthenopeum (Von Salis, 1793), Leucozonia nassa (Gmelin, 1791), Lithopoma olfersii (Philippi, 1846), and that of terrestrial shells from Thaumastus achilles (Pfeiffer, 1852) and Megalobulimus terrestris (Spix, 1827), collected from the archaeological layers in the sequence, were measured and a value of 67 ± 33 14C yr was obtained for the local offset from the average global marine reservoir age. The effect of upwelling in this region and in its surrounding area is discussed.", "Extreme weather events are likely to become more frequent in the 21st century bringing significant impacts to coastal ecosystems. However, the capacity to detect and measure those impacts are still limited, with effects largely unstudied. In June 2016, a hailstorm with wind gusts of over 100 km·h?1 caused an unprecedented mangrove dieback on Eastern Brazil. To quantify the scale of impact and short-term recovery of mangroves (15-mo), we used satellite imagery and field sampling to evaluate changes in forest structure in control and impacted areas after the hailstorm. Satellite imagery revealed mangrove dieback in over 500 ha, corresponding to 29.3% of the total forest area suddenly impacted after the hailstorm. Fifteen months after the hailstorm, some impacted areas show an initial recovery, while others continued to degrade. The El Niño years of 2014–2016 created mild drought conditions in Eastern Brazil. As observed in wetlands of semi-arid regions during the same period, mangrove recovery may have been impaired by continued physiological stress and climate change effects. Economic losses in the study site from typical mangrove ecosystem services including food provision, climate regulation, raw materials and nurseries are estimated to at least US$ 792,624 yr?1. This is the first evidence of an extreme weather impact on mangroves in Brazil that typically provide unique ecological and economic subsistence to coastal populations. Our results reveal that there is a pressing need for long-term monitoring and climate change adaptation actions for coastal wetlands in Brazil, and to provide broad estimates of ecosystem values associated with these ecosystems given many areas are already experiencing chronic stress from local impacts, drought and high temperatures.", "The coastal zone, where most of the Brazilian population lives, plays a central role for discussing vulnerability and adaptation strategies to climate change. Besides saltmarshes, mangroves and coral reefs, this region also presents seagrass beds, macroalgae and rhodolith beds, forming underwater forests, which are key habitats for services such as biodiversity conservation, O2 production, and absorption of part of the CO2 from the atmosphere. Science endorses that ocean warming and acidification, sea level rise, biological invasions and their interactions with pollution, overfishing, and other stressors undermine the structure and functioning of these ecosystems, thus increasing the region's socio-environmental vulnerability. Ecosystem conservation, management and potential bioremediation/restoration using science-based solutions must be prioritized in order to reduce the vulnerability of coastal communities and the ocean.", "Purpose: In order to assess the impact of anthropogenic activities on carbon and nutrient accumulation, total organic carbon (TOC), nitrogen (TN), and phosphorus (TP) accumulation rates were examined in a 210Pb-dated mangrove sediment core from Sepetiba Bay, Brazil, a coastal region impacted by multiple environmental changes during the previous century. Materials and methods: A 50-cm length sediment core was collected from a mangrove forest in Sepetiba Bay. Sediment subsamples were analyzed to measure TOC, TN, ?13C, and ?15N using an elemental analyzer attached to an isotope ratio mass spectrometer Thermo Finnigan Model Delta Plus XP, whereas colorimetric analysis were used to measure TP. For 210Pbex analyses, gamma-ray measurements were performed in a semiplanar intrinsic germanium high purity coaxial detector, coupled to a multichannel analyzer, whereas the sediment accumulation rate (SAR) was calculated according to the constant initial concentration (CIC) method. Also, carbon and nutrient fluxes were calculated using SAR and TOC, TN, and TP contents, whereas statistical differences were evaluated by ANOVA + Tukey HSD analysis with previous data normalization. Results and discussion: The calculated sedimentation rate (~ 8.1 mm year?1) since the early 1900s was up to threefold higher than the global mean determined for mangrove forests (~ 2.8 mm year?1) and the regional sea level rise (~ 3.2 mm year?1). Significantly higher TOC, TN, and TP fluxes, up to nearly 1000, 90, and 15 g m?2 year?1, respectively, were observed after the water diversion from a nearby drainage basin in the 1950s and an increase in sewage effluent input, which increased in the early 1990s. After this period, lighter ?13C values (~ ? 25‰) indicate an increased importance of the terrestrial organic matter source, while lower TOC:TN ratios (~ 11) and heavier ?15N values (~ + 9‰) suggest an increased influence of anthropogenic fertilization on inorganic nitrogen accumulation. Conclusions: The significantly higher accumulation rates during the last decades evidenced the role of mangrove sediments as sinks for anthropogenically enhanced inputs of carbon and nutrients. Also, studies on carbon and nutrient accumulation evidenced the need for further research in eutrophic coastal areas.", "The fragmented and sectoral character of conservation as well as development policies has exacerbated the problems faced by small-scale fishers in developing countries. In Ilha Grande Bay (Rio de Janeiro, Brazil), traditional small-scale fishers (“Caiçaras”) has struggled to respond to the contemporary challenges of overfishing and territory loss, which emerged, in part, as consequence of biodiversity conservation and development policies implemented over the last fifty years. In this paper, we aim to explore a sustainable territorial development approach to improve quality of life of fishing communities while conserving the land and seascape that they explore. We first look at the past phases of the development trajectory of Ilha Grande Bay in order to plan for the future. Data collection involved analysis of documentary sources, direct observation in decision-making arenas, and semi-structured interviews. We analyzed four periods from the development trajectory, focusing on small-scale fishing. Our findings show that the set of policies reviewed has strengthened the connections between biodiversity loss and poverty over the years. The viability of STD strategies depends on the recognition of the complexity of interactions among fisheries, environmental protection and tourism, and on the need to create a supply chain that adds value to fishery products which sustain livelihoods and has low environmental impact.", "Conservation science is a mission-driven discipline, yet there are few assessments on whether conservation practices follow scientific recommendations, and thus missed opportunities for improvement. Brazil has among the greatest gaps in species protection by Marine Protected Areas (MPAs) globally and is thus a priority for future marine conservation efforts. In this paper, we assess the federal marine protected area (MPA) planning process in Brazil and compare it to a systematic conservation planning approach, focused on achieving conservation benefits while minimizing associated costs. We review the available information for all (70) federal MPAs, and the 26 associated management plans available. We found five simple opportunities for improving national MPA planning: (1) identifying specific and quantitative objectives and linking them to timeframes and budgets; (2) developing strategic monitoring and evaluation programs focused on MPA performance; (3) enabling local stakeholders to participate in planning processes, (4) explicitly considering MPA costs and leveraging existing sources of funding, and (5) decentralizing resource management and empowering local stakeholders to manage resources sustainably. Many reviewed MPA planning efforts fall short in providing clear management guidance and our recommendations can foster a stronger platform for the conservation and sustainable use of marine resources in Brazil." ]

[ "Most of Brazilian oil and gas reserves are located in offshore deep waters. In this scenario, high well productivity is essential. Artificial lift will certainly play an important role in the exploitation of those deep water fields. This paper describes the most important artificial lift methods, their main characteristics and application niches. It also shows what Petrobras is currently doing in order to make them available for subsea use. The following methods are analyzed: gas lift; electrical submersible pump; hydraulic jet pump; progressing cavity pump; multiphase pump; subsea separation system." ]

[ "A300" ]

[ "Petrobras, as the largest operator in ultra-deep waters in South America, has been using a field development concept that has proved to be winner since 2010. This concept is well suited for fields with high productivity wells, which produce more than 20,000 barrels of oil per day. In the market, this concept is known as “satellite wells”. In this scenario, Petrobras has benefited from its strategy of standardizing subsea equipment, including Wet Christmas Trees (WCT), Flexible Pipes, Umbilicals and Subsea Manifolds. However, since the downturn of 2014, Petrobras has been struggling to simplify its own specifications, looking for the most attractive CAPEX solutions in the market, allowing suppliers to use their own knowledge and experiences to propose low cost solutions, meeting projects requirements. From 2015 onwards, Petrobras has been working with the suppliers, with the Early Engagement initiative, aiming that the integration synergies, existing assets and the experience of these suppliers, could bring to the projects, the benefits of CAPEX reduction, and allowing the advancement and approval of these projects internally in the company. Technological development programs to allow the use of flexible pipes that are resistant to contaminants such as CO2 and H2S, new CRA materials to be applied to rigid flowlines and low-cost riser configurations, have been pursued by Petrobras in order to enable the implementation of ultra-deep water projects.", "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan.", "Brazilian company Petrobras has discovered various new deepwater pre-salt reservoirs and plans to devote 17% of its E&P capital during the 2009-2013 plan for the development of these resources. According to Petrobras' 2009-2013 Strategic Plan, pre-salt output could be the biggest source of domestic production growth, adding 1.24 million bpd between 2013 and 2020. Brazil's offshore basins, Santos, Campos, and Espirito Santo, contain 85% of the country's oil reserves, and development of the Santos Basin subsalt will drive long term oil production growth. The company has made various efforts to identify the potential of Tupi well area and conducted a large deepwater seismic acquisition program in this direction. Petrobras also announced a light oil discovery in the pre-salt layer in the Marlim Field production concession in the Campos Basin in 648 m of water.", "Petrobras has almost 30yr experience of developing oil and gas resources offshore Brazil. Most important is the company's success in developing technologies for deepwater production systems in the Campos Basin. These technological challenges and developments are described together with specific development programmes for the deepwater Albacora and Marlim oilfields.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "BR Petrobras plans to spend $224 billion through 2014 to develop deepsea oil finds. Supplying equipment in a timely fashion will be key to its efforts to nearly double oil production in Brazil by 2020. Brazil's government wants the majority of the cash headed to local companies or local units of foreign multinationals and wants to develop the oil services sector, creating industry that could export goods and services around the world. Thus, gradually, the minimum local content requirements will increase up to 95% in 2017. Whoever wishes to have a major role in the E&P will have to establish significant local presence, in particular equipment suppliers (topsides, pipes, drilling packages, power packages for offshore units, etc.), who will likely need to build production facilities in Brazil. The issue is not only to install local manufacturing support, but also pre-sales technical support, a presence close to the shipyards and operators throughout the phase of integration, commissioning and operation, and a very strong and effective after-sale support. The paper will discuss the overall strategy needed to bring to Brazil the technical and manufacturing expertise to support the rapid growth of the shipbuilding industry and will examine the importance of providing local support to the yards and owners to reduce delays in technical proposal and during the construction phase of vessels. Honeywell has set up, in addition of its already existing operations, a Marine operation in Rio de Janeiro. This unit includes: • Front End Engineering Desing (FEED) • Customer Engineering Project Support • Technical sales support • Installation & Commissioning support. • Service Station • Local spare part inventory. Consideration will also be given to a study being run by Honeywell to implement an assembly line in Brazil to minimize logistics costs and delivery times.", "Petrobras has indulged in R&D programs and technology partnerships with key contractors, opening up offshore development opportunities within Brazil. One of the main contractors helping Petrobras to achieve its goals on Marlim is FMC Technologies Inc. The subsea separation, pumping, and water reinjection system will be installed in 899 m water depth to meet the challenge of increased water production. Petrobras has awarded FMC an additional subsea separation and boosting system contract for the brownfield Congro and Corvina development, also in the Campos basin. Petrobras has recently completed its successful Procap 3000 research program, which was a driver for many of the operator's deepwater advances. In the Future Vision Procap program, the company is laying emphasis on the pursuit of solutions that could significantly alter current standards for developing deepwater fields.", "An overview covers ongoing offshore E&P developments in Brazil, Peru, Venezuela, and Argentina and the interest of policy in the sub-salt. Information on E&P activity in Latin America begins in Brazil and includes discussions on discoveries in the pre-salt/sub-salt in deep water. Discoveries are being made in the Santos and Campos basins offshore Brazil by BG Group, OGX, Petrobras, and Chevron. Contracts Petrobras is making with companies to supply subsea equipment are cited. A map illustrates the location of the Brazilian offshore basins that include those of Santos, Campos, Espiritu Santo, and Camamu-Almada. Frame agreements are cited such as one between Petrobras and FMC Technologies with a term of 4 yr to manufacture up to 107 trees and equipment for subsea use in Brazil at water depths of 2,000 m. Legislation has been proposed in Brazil to create production sharing contracts with Petrobras of all the petroleum and gas in the subsalt strata in \"strategic areas\". The idea is to use the profits from the sub-salt hydrocarbons for social and economic development without infringing on the rights of private companies now active in the offshore. ION Geophysical has acquired 28,000 km additional of regional seismic data that cover the south of the basins of Santos, Pelotas, and northeast of the Equatorial basin. In agreement with the company, BrasilSPAN that contains 42,000 km offers the first collection of the contiguous Brazilian coast. The activities of BPZ Resources and Gold Oil in the Peruvian E&P are cited. Cardon IV SA, a joint operating company of Eni and Repsol, has discovered gas at the Perla IX well in Venezuela at 240 m indicating the field has reserves of over 6 tcf (1 Bboe). During production tests, high quality gas has been produced with 600,000 cu m/day and 500 bbl/day of condensate. In Argentina, ION Geophysical has completed the processing and interpretation of data relating to the seismic ArgentineSPAN that contains ?11,800 km of new regional data of the southern Atlantic Argentine border from the Argentina-Uruguay international frontier to the Argentinian southern point in the Tierra del Fuego. The program offers high resolution images in all the ocean basins in Argentina.", "The 3 million bpd of crude oil produced globally in deep waters represent only 4% of the total explored volume by the petroleum industry. However, the expectation of a large increase in demand for energy in the coming decades is attracting new investments by oil companies. Although a matter that dominates the scene in Brazil, E&P in deep waters has marginal international participation and encounters unexplored frontiers. The global oil industry has discovered about 60,000 million bbl of petroleum in deep waters, half of which since 1995 has occurred in Brazil, Gulf of Mexico, and Western Africa, according to one study. In a study by the Total company, 90% of the global reserves of petroleum in deep waters of about 50,000 million bbl, are to be found in the \"Golden Triangle\" of the petroleum industry, namely, Brazil, Gulf of Mexico, and Western Africa. There is a consensus that the high prices for petroleum are an indication that exploration for petroleum in deep waters off Latin America may significantly increase the reserves of the region. The world consumes about 75,000 million bpd of crude oil and 6.5 MMM cu m/day of natural gas. Hardly some 3 MM bpd of crude oil are produced in deep waters or 4% of the total volume explored. In the coming three decades the demand for energy is expected to increase by two thirds and between now and 2015 the production in deep waters could triple reaching over 8 MM bpd. In the Offshore Magazine study on FPSO, of the 106 FPSO now operating in 23 countries, 16 are in Brazil. Of the 106 FPSO, 13 operate in waters at greater than 1,000 m depth. Of these 13, 7 are in Brazil, 4 in Angola, and 2 in Nigeria. In 2006, 21 FPSO are being built or being converted in the world and 56 FPSO are being bid for, will be bid for, or are in the final stage of conception and design. The large part of these projects is Brazilian. From now to 2010, 2,011 new underwater production projects will be initiated in Brazil that will include about 20 new platforms. In addition to offshore Brazil, Petrobras is active offshore Argentina and Colombia and has joined with large companies to explore in deep waters in the Gulf of Mexico.", "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil." ]

[ "This is the year in which Petrobras consolidates its position in the international LNG market starting with the implementation of the LNG terminals in the Bay of Guanabara, state of Rio de Janeiro, and the port of Pecém, in the state of Ceará. These terminals integrate the Petrobras LNG system and are considered to be the best technical and economic solution to make the supply of gas flexible for the markets of thermal and non-thermal generation of energy. The supply of LNG permits modulating the purchase according to demand. The Brazilian natural gas market has the potential to expand and is characterized by a flexible demand associated with generation of electricity and by a stable demand represented by industry, transport, and residential uses. In the Brazilian national electrical energy grid, thermo-electrical energy complements hydropower. About 11% of installed capacity in Brazil is supplied by thermo-electrical plants moved by natural gas and 80% by hydropower. The Petrobras LNG project will be supplied by the international market and the dry season in Brazil in which the demand for LNG increases coincides with a lesser demand in the countries in the Northern Hemisphere, benefiting the country. The use of natural gas in Brazil has increased at 4%/yr avg in recent years and represents 10.46% of the Brazilian energy matrix. Petrobras estimates place the use of natural gas in Brazil in 2011 at 12%. The flexible LNG terminals were designed starting with an unpublished concept, namely, a floating wharf with the capability to receive a supply ship on one side and a regasification ship on the other side. The LNG will arrive by the supply ship, be processed in the regasification ship, and injected into the gas pipeline that connects to the Duque de Caxias (Reduc) refinery to be distributed to the transmission grid. At Pecém, the wharf is connected to an extension of the Gasfor that will connect the gas from the terminal to the state grid. Petrobras has leased two ships to operate with the flexible terminals, the Golar Spirit, with 129,000 cu m of LNG and regasification at 7 million cu m/day, and the Golar Winter, that carries 138,000 cu m of LNG and that can regasify 14 million cu m/day. There is not yet a definite site for the third terminal. The goal is to be able to supply by 2012 LNG of up to 31 million cu m/day, corresponding to what Petrobras imports from Bolivia today." ]

[ "A645" ]

[ "Petrobras and the UK's BG Group are studying the possibility of installing floating gas-liquefaction plants at the large offshore oil and gas discoveries in the Campos basin's pre-salt areas. The proposed 14 million cu m/day LNG plant would be moored 300 km offshore and would collect gas from various fields in the area, including the giant Tupi discovery. LNG would be delivered to domestic terminals during the country's dry season when, gas-fired power generation supplements hydropower, and exported at other times.", "During the exploratory phase, Petrobras traditionally performs extended well tests (EWT) in deepwater reservoirs. In offshore environments these extended well tests (EWT) are performed by ships that are able to store the produced oil in cargo tanks for subsequent offloading. In pursuit of a more environmentally friendly alternative, PETROBRAS has researched gas to liquid (GTL) technology, which converts natural gas into synthetic crude oil that can be mixed with the produced oil for storage and offloading. Numerical simulations were carried out taking into account a pre-reforming, steam methane reforming and Fischer-Tropsch synthesis section via a steady state refining process simulator called PETROX developed by Petrobras. Two single trains of natural gas feed containing CO2 were considered. CO2 was consumed in the steam methane reactor to form CO as a consequence of equilibrium change in the steam methane and water-gas-shift reactions. Nevertheless, the GTL overall process cannot be considered a CO2 sequestration process yet, since the net CO2 process balance is positive. The results show that there are optimization opportunities to develop pre-reformer catalysts less selective to CO2 production and reformer catalysts capable of increasing the dry reforming reaction extension with no coke formation. In addition, changes in the process can be done to replace natural gas by hydrogen in the reformer combustion to increase the overall carbon efficiency and reduce the CO2 emission. The observed reduction in the overall syncrude production with high CO2 content is acceptable to the EWT scenario.", "The lastest discoveries of oil and gas reserves in the Brazilian offshore area present new challenges on gas transportation due to their location, far away from the coast. For these new scenarios, Floating Liquefied Natural Gas (FLNG) units may be a good solution for a natural gas volume production around 2.5 MTPA. It is worth saying that this technology hasn't been proved yet. So, there are many challenges to overcome to turn the FLNG into an economically and technically feasible solution for these new scenarios. One of the main challenges for establishing a LNG (liquefied natural gas) offshore unit is the definition of the liquefaction process technology to be used. Characteristics such as motion effects, footprint, robustness, operational flexibility and asiness, safety, maintenance and availability must be considered when the main differences between the processes are being identified. Depending on the capacity to be attended, liquefaction processes may use hydrocarbon refrigerant mixtures or inert refrigerant fluids. Due to the environmental conditions in Brazilian waters, side-by-side offloading operations are not possible, as the operational availability would not be large enough. Therefore, LNG offloading would only be achieved through the tandem operational mode. Since the technology available for this kind of operation uses aerial hoses, it will be necessary to provide a bow loading system (BLS) installed on the LNG carrier and also a dynamic positioning system (DP) may be needed for an accurate control of the positioning and maintenance of a relative heading. The study indicates that the cargo containment system (CCS) should fulfill some constraints: let free upper deck area for topsides facilities; withstand any partial filling condition (sloshing impacts); have a good track record; and its configuration should allow inspection and maintenance in the offshore environment. This paper reports the Petrobras findings on the evaluating of the FLNG technology. Petrobras considers the FLNG unit an attractive option for its scenario, although many sub-systems still present important challenges in order to achieve a good overall performance. The choice of the best technology for each sub-system is still on-going, aiming the largest reliability and the minimum cost possible.", "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "Petrobras, as the largest operator in ultra-deep waters in South America, has been using a field development concept that has proved to be winner since 2010. This concept is well suited for fields with high productivity wells, which produce more than 20,000 barrels of oil per day. In the market, this concept is known as “satellite wells”. In this scenario, Petrobras has benefited from its strategy of standardizing subsea equipment, including Wet Christmas Trees (WCT), Flexible Pipes, Umbilicals and Subsea Manifolds. However, since the downturn of 2014, Petrobras has been struggling to simplify its own specifications, looking for the most attractive CAPEX solutions in the market, allowing suppliers to use their own knowledge and experiences to propose low cost solutions, meeting projects requirements. From 2015 onwards, Petrobras has been working with the suppliers, with the Early Engagement initiative, aiming that the integration synergies, existing assets and the experience of these suppliers, could bring to the projects, the benefits of CAPEX reduction, and allowing the advancement and approval of these projects internally in the company. Technological development programs to allow the use of flexible pipes that are resistant to contaminants such as CO2 and H2S, new CRA materials to be applied to rigid flowlines and low-cost riser configurations, have been pursued by Petrobras in order to enable the implementation of ultra-deep water projects.", "Petrobras has awarded Excelerate Energy a 15-yr time charter for which Excelerate will provide an advanced floating storage and regasification unit (FSRU) to be named by Petrobras VT3. Capable of storing 173,400 cu m, the vessel will deliver 20 million cu m/day of natural gas to southeastern Brazil. In addition, from July 2013 until the arrival of the VT3 newbuilding, Petrobras' Guanabara Bay LNG terminal will use Excelerate's Exquisite FSRU with an increased regasification plant, expanding the terminal's delivery capacity from 14 million to 20 million cu m/day. The VT3 newbuilding design is based on Excelerate's existing fleet and Petrobras requirements. Capable of operating as both an FSRU and a fully tradable LNG carrier, the vessel is to enter service in May 2014.", "Considering demands for internal Brazilian market and international crude oil trade, PETROBRAS has taken the decision to concentrate a significantly part of the future of crude oil production from three deep-water fields; Roncador, Marlim Sul and Marlim Leste, all of which are in Campos Basin, with one off-shore terminal. The name of this project is PDET. This project comprises of a fixed central pumping station, PRA-1, a large FSO (2,1 million barrels storage capacity), and two calm buoys systems, at a depth of 100 m. The start-up of this project involves the crude oil from three producing platform; P-52, P-51 and P-53, which are all currently under advanced construction. In the future PDET will receive the production of crude oil from two additional new platforms. Each producing platform will have its own export pipeline, direct to PRA-1. The peak production of this system will achieve 600,000 bbl/day. PRA-1 will have special requirements to pump crude oil either to FSO or to the calm buoys systems. Based on a steel jacket structure the capacity of power generation will be 75 MW, up to 34 inches pigging capacity and many diverse pipings. The FSO has special specifications such as the electrical power and optical swivels, both are at a high level of technology and capacity. To achieve system's targeted reliability extensive studies were done. Integrity protection system, leak detection system, offloading time, sub-sea layout and flow rates were taken into consideration. Environmental risks were fully mitigated. The final configuration, which achieved high standard integrity assurance, produced a valuable project. This paper describes the logistics of this project focusing PRA-1 pumping, the export system through calm buyos, sub-sea facilities and the FSO. Also it will be highlighted some management programs used to implement this project. This work reviewed the major aspects of implementing this important infrastructure offshore facility to transport crude oil. Several technical and managerial challenges were surpassed through introduction of new technologies, tools and techniques.", "In order to comply with ANP / INMETRO No. 1 regulations, Petrobras undertook a project to install fiscal flow meters on its gas pipelines located on its Marlin Asset platforms in the Campos Basin. However, meter installation required 15 days of shutdown on each platform, which would reduce production rates. A technology was needed to minimize shutdown time and maximize revenues; Petrobras selected Hot Tapping and Plugging with a Bypass arrangement. Hot Tapping and Plugging with Bypass procedures isolates a section of the pipe through the installation of temporary STOPPLES that are inserted into the pipe through hot taps made on in-line welded fittings. Using distinct fittings upstream and downstream of the section, it was possible to install a by-pass that allows the normal pipeline flow to remain uninterupted. This procedure allowed the installation of the flow meters on the gas lines and flare lines of 6 Marlin asset platforms on the Campos Basin with no shutdown between February and October 2006. The project lasted for a full year and included planning, engineering design, preliminary inspection, fittings in-line welding, hot tapping and plugging and the installation of 27 flow meters. No production time was lost. A technology taskforce was formed to develop and approve the STOPPLE procedure, since no previous Petrobras standard existed prior to this project. All safety and technical issues were studied and developed to comply with Petrobras safety and quality standards. Through the use of Hot Tapping and Plugging with Bypass technology Petrobras reduced planned shutdown on 6 platforms by 35 days.", "Petrobras has launched the 38-in., 179-km Cabiunas-Reduc III (Gasduc III) gas pipeline, which is capable of carrying 40 million cu m/day. Gasduc III enhances regional transportation capacity to 40 million from 16 million cu m/day. The line can transport gas produced in the Campos and Espirito Santo basins, as well as gas imported from Bolivia and from the Guanabara Bay LNG Regasification Terminal. Gasduc III also will be able to receive gas coming from the Santos Basin, once the Caraguatatuba-Taubate gas pipeline has been completed in later 2010. Gasduc III interconnects Brazil's main natural gas processing pole, the Cabiúnas Terminal, to natural gas Hub 2, in Duque de Caxias. According to Petrobras, in addition to the Paulinia-Jacutinga gas pipeline, the transportation network that supplies the state of Minas Gerais will be further reinforced in May 2010 when the 267-km Gasbel II line is scheduled to begin operating. With the Paulinia-Jacutinga and Gasbel II gas pipelines, Petrobras will boost its natural gas transportation capacity to Minas Gerais fourfold, rising to 13.2 million from 3.2 million cu m/day.", "Due to advances in the development of technology for distributed or small-scale gas-to-liquids (GTL) technology, a much more flexible and economical option for capturing associated gas, both on- and offshore - in the form of modular GTL technologies - is approaching. These systems are designed to operate efficiently and economically when producing ? 500 bpd. UK-based company CompactGTL plc and Velocys are developing modular solutions that combine steam methane reforming (SMR) and Fischer Tropsch (FT), and both have found ways to reduce the size of the hardware. In the integrated two-stage system developed by CompactGTL, which is designed to incorporate modules weighing < 25 ton and producing 200 bpd of liquids per module, the SMR and FT reactions are carried out in a series of mini-channels. In contrast, the Velocys combined SMR/FT system for offshore GTL takes advantage of microchannel reactor technology to shrink the hardware and intensify the processes even further. Both the CompactGTL and Velocys technologies have reached the trial stage. CompactGTL entered into a joint development testing agreement in 2006 with Petrobras to deliver a 20 bpd pilot plant to be tested onshore at the Petrobras Aracaju site in Brazil. While, in March 2010, Velocys entered into a joint demonstration and testing agreement with offshore facility developer Modec, Toyo Engineering, and Petrobras, to build and operate a 5-10 bpd microchannel GTL demonstration plant at the Petrobras facility in Fortaleza, Brazil. The trials being undertaken by CompactGTL and Velocys suggest that it may well be possible to reap the advantages of small-scale GTL sooner rather than later." ]

[ "Analyses of living (L) and dead (D) foraminifera assemblages associated to environmental parameters were applied at the Almada River Estuary, aiming for assessments concerning local biodiversity, hydrodynamic sector and environmental quality. A total of 27 species were identified in the living assemblage and 35 in the dead, with the predominance of Ammonia tepida and Cribroelphium excavatum. A DCA for the living fauna demonstrated that C. excavatum Adelosina milletti, Elphidium discoidade, Rosalina bradyi and Triloculina oblonga were associated to shallow areas with muddy sediment and under marine influence in the estuary. Laryngosigma lactea and Pyrgo oblonga were associated to deep areas with sandy sediment under marine influence. All agglutinated species and the calcareous D. nitida and Miliolinella subrotunda were associated with organic matter and high chlorophyll levels from mangrove areas. A cluster analysis performed for L and D revealed five estuary regions: I - composed predominantly by D transported from the inner shelf; II - composed by L marine species; III - composed by D transported from region II and the inner shelf; IV - composed by living agglutinated species that delimit the beginning of the upper estuary area; and V - composed by transported agglutinated foraminifera and some calcareous species transported during storm episodes The present study was efficient in the environmental characterization of the Almada River Estuary and can be used as a baseline to understand natural or anthropic impacts in this ecosystem." ]

[ "A1552" ]

[ "Length-weight and length-length relationships were determined for nine fish species of Rocas Atoll, Fernando de Noronha and Trindade Island. Samples were conducted in 2014 (Rocas) and 2015 (Noronha and Trindade) in tidepools using anaesthetic clove oil and hand nets to collect fish fauna. Four species (Stegastes rocasensis, Scartella itajobi, Starksia multilepis and Bathygobius brasiliensis) are endemic from the Noronha-Rocas ridge, two are endemic from the Trindade-Martin Vaz insular complex (Scartella poiti and Malacoctenus brunoi), and three species have a widespread distribution. All relationships are novel for science.", "Here palynological assemblages are presented from channel surface sediment samples from the Caceribu, Guaraí and Guapimirim-Macacú rivers located in an important area of the Brazilian coast (Guanabara Bay, State of Rio de Janeiro), in order to provide information relevant for the interpretation of palaeoecological records. The data indicate the predominance of pollen types from the Atlantic Forest in all samples and a relatively low representation of mangrove pollen, suggesting distant (regional) fluvial transport. Avicennia and Rhizophora were represented in those samples closer to the intertidal zone, Rhizophora being the most important. It was possible to verify a marked difference in pollen concentration/deposition among the three rivers, probably related to the different hydrodynamic pattern of each river. A low concentration of palynomorphs occurred in the Macacú-Guapimirim River, resulting from its higher flow, and there was a high deposition of palynomorphs in the sediments of Guaraí River, in response to its isolation from the hydrographic Guanabara Bay basin. It was possible to verify other interesting data, such as low palynomorph concentration in samples from near the mouth and an increase of palynomorphs in the upstream samples, mainly due to the more active action of the tidal currents. Meanwhile, the increase in the total concentration of the palynomorphs in the upstream samples coincides with the maximum reach of the saline waters and their meeting with the internal flow of the rivers.", "Seventeen species of podocopid and platycopid Ostracoda were recorded in the 26 samples studied from the DSDP (= Deep Sea Drilling Project) Site 515B, Brazil Basin. The Trachyleberididae (eight spp.) and Krithidae (four spp.) are the most-represented families. Most species were left in open nomenclature because of scarcity or poor preservation. The assemblages composition shows moderate similarity to previously-studied deep-sea assemblages. The distribution pattern of the Eocene-Oligocene deep-sea ostracodes is briefly discussed as a contribution to the understanding of Paleogene ostracode zoogeography.", "Given the importance of copepods in pelagic food webs, short- and medium-scale temporal variation in the distribution and abundance of copepods of the genus Pseudodiaptomus was investigated in an oligo-mesohaline estuary (Paracauari) in northern Brazil. This system is characterized by high local hydrodynamics and nutrient input from the Paracauari River and Marajo Bay, and marked seasonal variation in rainfall levels. The temporal variation in the abundance of copepods was analyzed in the context of some hydrological variables tide height, salinity, temperature, pH, and concentrations of suspended particulate material, dissolved oxygen and chlorophylla. Samples were collected in 2009 at a fixed station (00° 44'15.4 '' S, 48° 31'07.5 '' W) every 3 hours during a nycthemeral cycle in the neap and spring tides of February, May, June, August, November, and December. Zooplankton samples were collected using horizontal hauls of plankton nets with a 120 pm mesh. Following identification, the abundance and density of Pseudodiaptomus copepods were determined. Data were analyzed using an ANOVA (to assess the significance of diurnal, fortnightly and seasonal variations), PCA, and Bray-Curtis similarity. Four species were identified: Pseudodiaptomus richardi, Pseudodiaptomus marshi, Pseudodiaptomus gracilis, and Pseudodiaptomus acutus. The results indicate that variation in composition and density of the Pseudodiaptomidae copepods in the Paracauari estuary is determined by the interactive effect of the freshwater influx from Marajo Bay, tides, and the rainfall regimen, which modulate local salinity. The absence of diurnal variation in species composition and density was determined by the high local hydrodynamics, which provoke the constant mixing of the estuary's water.", "Micropaleontological analyses based on calcareous nannofossils were conducted on samples taken from the Agencia Nacional de Hidrocarburos (ANH)-Piedras Blancas-1 Well, which was drilled in the Sinú–San Jacinto Basin, Caribbean Region of Colombia. A summary of published literature on fossil coccolithophores from the marine Cenozoic record of South America reveals that our study is the first to report Lower Eocene coccolith-bearing sedimentary rocks in the substratum of the Caribbean inland margin. The assemblages are characterized by common occurrences of Reticulofenestra dictyoda and Sphenolithus radians and sporadic occurrences of Girgisia gammation, Heliodiscoaster lodoensis, and Sphenolithus orphanknolli. The co-occurrence of H. lodoensis, R. dictyoda, and S. orphanknolli indicates that the core between 1190 ft (362 m) and 279 ft (85 m) encompasses Zone NP12 to Subzone NP14a and spans the interval between ~53 to ~48.3 Ma of the latest Early Eocene (Late Ypresian Age). Small placoliths (R. dictyoda and Reticulofenestra <3 lm) and sphenoliths (S. radians and Sphenolithus spp.) dominate the tropical assemblages. Other species include Campylosphaera dela, Coccolithus formosus, Coccolithus pelagicus, Helicosphaeroides lophota, Helicosphaeroides seminulum, and Pontosphaera spp. Investigations on calcareous nannofossil distribution in Cenozoic marine sediments from South America are few, and most published information concerns the Brazilian continental margin and inland Argentina. The Man Aike Formation from the Austral Basin of Argentina is the only Lower Eocene formation available for comparison.", "Aim: The disjunct distributions of freshwater organisms along coastal drainages are usually explained by palaeodrainages formed during sea-level retreats that connected currently isolated basins, or by river capture from tectonic adjustments between adjoining watersheds. We evaluate the relative importance of these events on the genetic variation of freshwater fishes inhabiting the Serra do Mar in eastern Brazil, a region with steep mountains and pronounced bays. Location: Coastal river drainages in southeastern Brazil. Taxon: Catfishes of the Trichomycterus alternatus group. Methods: We tested the effects of palaeolandscape connections (GIS-reconstructed palaeodrainages and putative river captures) on the genetic structure (mitochondrial and nuclear markers) of T. alternatus from 15 drainages using phylogenetic reconstructions, lineage delimitation methods and analyses of molecular variance. Results: Trichomycterus alternatus is monophyletic and comprised of three main lineages: two restricted to the basin at its northernmost distribution and another broadly distributed to the south. In the latter, seven major cytb clades were geographically compatible with the eight palaeodrainages, with three incongruences matching river captures previously described for the Guanabara Bay (GB). Shared haplotypes among isolated rivers flowing into GB provide the first molecular evidence of the ‘Rio de Janeiro’ palaeoriver. Main conclusions: Dispersal via palaeorivers is an important process, but it is not enough to recover the most recent dispersive events. Therefore, integrating both palaeo-riverine configuration (GIS-based) and localized river captures (geological studies) is crucial to reveal the role of past geological and climatic events on the distribution of freshwater organisms. Taken together, these two factors significantly explained a high portion T. alternatus genetic structure along coastal drainages, revealing a palaeolandscape scenario that may have been used by other freshwater Atlantic Forest taxa.", "Dinoflagellate cysts are commonly used to obtain the relative ages, correlations and paleoenvironmental interpretations of the Cretaceous and Paleogenic sections of the Brazilian continental margin. However, the micropaleontological data of the Pelotas Basin is mainly concerning to calcareous microfossils, which is not true for the sedimentary deposits of the Pelotas Basin, whose micropaleontological informations is mostly referring by calcareous microfossils. In this second contribution, we present the systematic and descriptive detailing of the dinoflagellates cysts of the Ptychodiscales and Gonyaulacales orders, from the analysis of 535 samples collected from two wells (BP-01 and BP-02) drilled by Petrobras S.A. in the offshore portion of the Pelotas Basin. The levels analyzed are rich and diverse, enabling the recognition of 137 species. In greater numbers, cysts belonging to the Order Gonyaulacales include 76 genera, 133 species, besides three sub-species. Two genera and four species were assigned to the Order Ptychodiscales. Among the described taxa, 72 are cited for the first time for the Brazilian basins. The recognized associations indicated ages between the Cretaceous and the Neogene, based on the occurrences of E. dettmanniae, D. acuminatum and O. indigena for the Cretaceous; D. californica, D. carposphaeropsis and E. reticulata for the Paleocene; B. longissimum, M. fimbriatum and M. perforatum for the Eocene; C. galea, C. aubryae and H. obscura for the Miocene. R. actinocoronata and A. andalousiensis recorded at the post-Miocene levels of the basin are indicative of younger ages, possibly positioned between the Pliocene and the Pleistocene.", "Loliginid squids constitute marine resources of increasing importance in shelf ecosystems off the coast of South Brazil. However, the existing information and knowledge about the occurrence of early-life stages and causes of distributional patterns are insufficient. Here, we have revisited Brazilian historical plankton samples obtained from 11 oceanographic surveys to identify paralarvae and their abundances over time. The study area and time period cover the region between Cabo de São Tomé (22°S) and Cananéia (25°S) at depths down to 200 m from 1991 to 2005. Of the 246 paralarvae quantified, ~50% were identified to the genus or species level, including Doryteuthis spp. (D. sanpaulensis and D. plei), Lolliguncula brevis and a single specimen of Pickfordiateuthis pulchella. Paralarval occurrence and abundance peaked in different areas and were associated with distinct oceanographic conditions: D. sanpaulensis occurred in the northern region associated with cold waters and upwelling events, D. plei occurred primarily in the southern region of the study area and in warmer waters, and L. brevis was found in shallow and low salinity waters in the estuarine region off the coast of Santos. Overall, the highest abundance of paralarvae occurred in the nearshore, northernmost areas during summer, and this can be associated with the observed retention mechanisms caused by local circulation, seasonal upwelling, the intrusion of nutrient-rich waters, and spawning peaks. The present study provides new information and evidence for loliginid patterns in the area that may potentially be useful for better understanding the recruitment patterns and fishery assessments of squid populations.", "This study was conducted in the Itajaí-Açu river lower estuary in Southern Brazil, in which we aimed to: (1) analyze spatiotemporal variations on the macrofauna; (2) search for relationships between environmental variables and the assembly and (3) evaluate the influence of capital dredging upon the assembly. Two hundred twenty eight samples were performed in four stations, two of which affected by dredging. Sediment (sand, silt and clay, organic matter and carbonate) and water column´s variables (temperature, salinity, pH, dissolved oxygen, and turbidity) were also assessed. We applied Principal Component Analysis for environmental variables and Hierarchical Clustering for biotic data. Correlations between environmental and biotic matrices were tested by Canonical Analysis of Principal Coordinates. Spatiotemporal variations in the assembly were tested by Permutational Multivariate Analysis of Variance. From the 21.839 organisms sampled, 97% was represented by the gastropod Heleobia australis. Despite the influence of the river discharge on the ecosystem, dredging was deleterious to the assembly, favoring opportunistic organisms such as H. australis.", "This study analyzes the geographical distribution of 131 podocopid ostracod species recovered from the Brazilian continental shelf between Cabo de São Roque (lat. 05°30’S) and Cabo Frio (lat. 23oS). This very large area corresponds to the northeastern and eastern Brazilian marine regions. The 104 samples studied were collected in water depths ranging from 12 to 110 m as part of the legs 4 and 7 of the REMAC Project. The cosmopolitan species, as well as those shared with the Caribbean and/or Gulf of Mexico region, represent a small part of the ostracods herein studied and it is assumed that their dispersion was prompted by processes linked to events of relative sea level changes during the Neogene and Quaternary. The fossil record of some species spans to the Neogene, mostly from the Atlantic coast of North and Central America, while one species has Tethyan origin. Three species known from the Neogene of the Caribbean have been recorded as relicts in the study area. From the 131 species herein identified, 36.5% are more widespread in temperate waters south of Cabo Frio town, 46.5% of warm waters north of Cabo Frio town, 4% are present only in the studied area, and 11.5% are rare and probably restricted to the E region. A new province – the Brazilian Province – is herein proposed based on the species occurrence." ]

[ "The major ocean currents connect geographic regions and also exert control on ocean life in other ways. Currents form natural boundaries that help define distinct habitats. Such boundaries may isolate different genetic strains of the same species as well as different species. Many marine animals (for example, salmon and squid) have migration patterns that rely upon transport in major ocean current systems, and other species rely on currents to distribute their larvae to new habitats. Populations of ocean species naturally fluctuate from year to year, and ocean currents often play a significant role. The survival of plankton, for example, is affected by where the currents carry them. Food supply varies as changing circulation and upwelling patterns lead to higher or lower nutrient concentrations. The heterogeneity of the oceans, its water masses, currents, ecological processes, geological history and seafloor morphology, have resulted in great variations in the spatial distribution of life. In short, biodiversity is not uniformly distributed across the oceans: there are local and regional biodiversity “hotspots” (see Chapters 33 and 35). Figure 3 shows a way in which the diversity of species is consequently distributed around the world. Various classification systems have been devised to systematize this variety, including the European Nature Information System (EUNIS) (Davies and Moss, 1999; Connor et al., 2004) and the Global Open Ocean and Deep Sea-habitats (GOODS) classification and its refinements (Agnostini 2008; Rice et al 2011))." ]

[ "B2043" ]

[ "The Earth's ocean and atmosphere are parts of a single, interactive system that controls the global climate. The ocean plays a major role in this control, particularly in the dispersal of heat from the equator towards the poles through ocean currents. The heat transfer through the ocean is possible because of the larger heat-capacity of water compared with that of air: there is more heat stored in the upper 3 metres of the global ocean than in the entire atmosphere of the Earth. Put another way, the oceans hold more than 1,000 times more heat than the atmosphere. Heat transported by the major ocean currents dramatically affects regional climate: for example, Europe would be much colder than it is without the warmth brought by the Gulf Stream current. The great ocean boundary currents transport heat from the equator to the polar seas (and cold from the polar seas towards the equator), along the margins of the continents. Examples include: the Kuroshio Current in the northwest Pacific, the Humboldt (Peru) Current in the southeast Pacific, the Benguela Current in the southeast Atlantic and the Agulhas Current in the western Indian Ocean. The mightiest ocean current of all is the Circumpolar Current which flows from west to east encircling the continent of Antarctica and transporting more than 100 Sverdrups (100 million cubic meters per second) of ocean water (Rintoul and Sokolov, 2001). As well as the boundary currents, there are five major gyres of rotating currents: two in the Atlantic and two in the Pacific (in each case one north and one south of the equator) and one in the Indian Ocean.", "The ocean is strongly coupled with the atmosphere, mutually transferring substances (mostly gases), heat and momentum at its surface, forming a single coupled system. That system is influenced by the seasonal changes caused by the Earth’s tilted rotation with respect to the sun. Variations in sea-surface temperature among different parts of the ocean are important in creating winds, areas of high and low air pressure and storms (including the highly damaging hurricanes, typhoons and cyclones). In their turn, winds help to shape the surface currents of the ocean, which transport heat from the tropics towards the poles. The ocean surface water arriving in the cold polar regions partly freezes, rendering the remainder more saline and thus heavier. That more saline water sinks to the bottom and flows towards the equator, starting a return flow to the tropics: the meridional overturning circulation, also called the thermohaline circulation. A further overall forcing factor is the movements generated by the tidal system, predominantly driven by the gravitational effect of the moon and sun. The movements of seawater help to control the distribution of nutrients in the ocean. The ocean enjoys both a steady (and, in some places, excessive) input from land of inorganic nutrients needed for plant growth (especially nitrogen, phosphorus and their compounds, but also lesser amounts of other vital nutrients) and a continuous recycling of all the nutrients already in the ocean through biogeochemical processes, including bacterial action. Areas of upwelling, where nutrient-rich water is brought to the surface, are particularly important, because they result in a high level of primary production from photosynthesis by phytoplankton in the zone of light penetration, combining carbon from atmospheric carbon dioxide with the other nutrients, and releasing oxygen back into the atmosphere. Whether in the water column or when it sinks to the seabed, that primary production constitutes the basis on which the oceanic food web is built, through each successive layer up to the top predators (large fish, marine mammals, marine reptiles, seabirds and, through capture fisheries, humans). The distribution of living marine resources around the world is the outcome of that complex interplay of geological forms, ocean currents, nutrient fluxes, weather, seasons and sunlight. Not surprisingly, the resulting distribution of living resources reflects that complexity. Because some ocean areas have high levels of primary production, the density of living marine resources in those areas and the contiguous areas to which currents carry that production is also high. Some of those areas of dense living marine resources are also areas of high biological diversity. The general level of biological diversity in the ocean is also high. For example, just under half of the world’s animal phyla are found only in the ocean, compared to one single phylum found only on land. Human uses of the ocean are shaped not only by the complex patterns of the physical characteristics of the ocean, of its currents and of the distribution of marine life, but also by the terrestrial conditions that have influenced the locations of human settlements, by economic pressures and by the social rules that have developed to control human activities — including national legislation, the law of the sea, international agreements on particular human uses of the sea and broader international agreements that apply to both land and sea.", "The winds in the atmosphere are the main drivers of these ocean surface currents. The interface between the ocean and the atmosphere and the effect of the winds also allows for the ocean to absorb oxygen and, more importantly, carbon dioxide from the air. Annually, the ocean absorbs 2,300 gigatonnes of carbon dioxide (IPCC, 2005; see Chapter 5). In addition to this vast surface ocean current system, there is the ocean thermohaline circulation (ocean conveyor) system (Figure 3). Instead of being driven by winds and the temperature difference between the equator and the poles (as are the surface ocean currents), this current system is driven by differences in water density. The most dense ocean water is cold and salty which sinks beneath warm and fresh seawater that stays near the surface. Cold-salty water is produced in sea ice “factories” of the polar seas: when seawater freezes, the salt is rejected (the ice is mostly fresh water), which makes the remaining liquid seawater saltier. This cold saltier water sinks into the deepest ocean basins, bringing oxygen into the deep ocean and thus enabling aerobic life to exist.", "The Southern Ocean (defined as all ocean area south of 60°S) deserves special mention due to its role in the storage of heat (and carbon) for the entire planet. The Antarctic Circumpolar Current (ACC) connects the three major southern ocean basins (South Atlantic, South Pacific and Indian) and is the largest current by volume in the world. The ACC flows eastward, circling the globe in a clockwise direction as viewed from the South Pole. In addition to providing a lateral connection between the major ocean basins (Atlantic, Indian, Pacific), the Southern Ocean also connects the shallow and deep parts of the ocean through a mechanism known as the meridional overturning circulation (MOC) (Gordon, 1986; Schmitz, 1996, see Figures I-90 and I-91). Because of its capacity to bring deep water closer to the surface, and surface water to depths, the Southern Ocean forms an important pathway in the global transport of heat. Although there is no observational evidence at present, (WG II AR5, 30.3.1, Hoegh-Guldberg, 2014) model studies indicate with a high degree of confidence that the Southern Ocean will become more stratified, weakening the surface-to-bottom connection that is the hallmark of present-day Southern Ocean circulation (WG I AR5 12.7.4.3, Collins et al., 2013). A similar change is anticipated in the Arctic Ocean and subarctic seas (WG I AR5 12.7.4.3, Collins et al., 2013), another region with this type of vertical connection between ocean levels (Wüst, 1928). These changes will result in fresher, warmer surface ocean waters in the polar and subpolar regions (WGII AR5 30.3.1, Hoegh-Guldberg, 2014; WG I AR5 12.7.4.3, Collins et al., 2013), significantly altering their chemistry and ecosystems.", "Consider how dependent upon the ocean we are. The ocean is vast – it covers seven-tenths of the planet. On average, it is about 4,000 metres deep. It contains 1.3 billion cubic kilometres of water (97 per cent of all water on Earth). But there are now about seven billion people on Earth. So we each have just one-fifth of a cubic kilometre of ocean to provide us with all the services that we get from the ocean. That small, one-fifth of a cubic kilometre share produces half of the oxygen each of us breathes, all of the sea fish and other seafood that each of us eats. It is the ultimate source of all the freshwater that each of us will drink in our lifetimes. The ocean is a highway for ships that carry across the globe the exports and imports that we produce and consume. It contains the oil and gas deposits and minerals on and beneath the seafloor that we increasingly need to use. The submarine cables across the ocean floor carry 90 per cent of the electronic traffic on which our communications rely. Our energy supply will increasingly rely on wind, wave and tide power from the ocean. Large numbers of us take our holidays by the sea. That onefifth of a cubic kilometre will also suffer from the share of the sewage, garbage, spilled oil and industrial waste which we produce and which is put into the ocean every day. Demands on the ocean continue to rise: by the year 2050 it is estimated that there will be 10 billion people on Earth. So our share (or our children’s share) of the ocean will have shrunk to one-eighth of a cubic kilometre. That reduced share will still have to provide each of us with sufficient amounts of oxygen, food and water, while still receiving the pollution and waste for which we are all responsible. The ocean is also home to a rich diversity of plants and animals of all sizes – from the largest animals on the planet (the blue whales) to plankton that can only be seen with powerful microscopes. We use some of these directly, and many more contribute indirectly to our benefits from the ocean. Even those which have no connection whatever with us humans are part of the biodiversity whose value we have belatedly recognized. However, the relationships are reciprocal. We intentionally exploit many components of this biodiverse richness. Carelessly (for example, through inputs of waste) or unknowingly (for example, through ocean acidification from increased emissions of carbon dioxide), we are altering the circumstances in which these plants and animals live. All this is affecting their ability to thrive and, sometimes, even to survive. These impacts of humanity on the oceans are part of our legacy and our future. They will shape the future of the ocean and its biodiversity as an integral physical-biological system, and the ability of the ocean to provide the services which we use now and will increasingly need to use in the future. The ocean is vital to each of us and to human well-being overall.", "Ocean resources provide the main sources of livelihoods to millions of people across the globe, as well as a wide range of ecosystem services and benefits, including oxygen production, food provision, carbon storage, minerals, genetic resources and cultural and general life support services. However, the ecosystem services from marine and coastal ecosystems are deteriorating at an alarming rate, owing to several human pressures, including climate change. Human activities are directly or indirectly affecting ecosystem services and can thus reduce or erase benefits that would otherwise be provided. As human activities in the marine environment are expected to increase in the future, in particular in areas beyond national jurisdiction, not only will they exert growing pressure on natural resources, but they may also threaten marine biodiversity and therefore the benefits that people obtain from ecosystem services. International law as reflected in the United Nations Convention on the Law of the Sea plays a crucial role in the conservation and sustainable use of the ocean and its resources and in safeguarding the many ecosystem services that the ocean provides for both current and future generations. Actions and efforts should be primarily focused on implementation and regulatory gaps, especially in areas beyond national jurisdiction. That gives added significance to the current negotiations at the United Nations on the elaboration of an international legally binding instrument under the United Nations Convention on the Law of the Sea on the conservation and sustainable use of marine biological biodiversity of areas beyond national jurisdiction. The distribution around the world of the benefits drawn from the ocean is still very uneven. Efforts by less developed countries to take advantage of what the ocean can offer them are hampered by gaps in capacity-building and resource and financial constraints. Capacity-building, shared scientific knowledge and collaboration to develop and transfer innovative marine technology will empower States to fully participate in and benefit from the conservation and sustainable use of the ocean and its resources and assist them in meeting their obligations.", "Impacts of climate change and related changes in the atmosphere Ocean circulation The intensified study of the ocean as part of the study of climate change has led to a much clearer understanding of the mechanisms of ocean circulation and its annual and decadal variations. As a result of changes in the heating of different parts of the ocean, patterns of variation in heat distribution across the ocean (such as the El Niño-Southern Oscillation) are also changing. Those changes in patterns result in significant changes in weather patterns on land. Water masses are also moving differently in areas over continental shelves, with consequent effects on the distribution of species. There is evidence that the global circulation through the open ocean may also be changing, which might lead, over time, to reductions in the transfer of heat from the equatorial regions to the poles and into the ocean depths. Storms and other extreme weather events Increasing seawater temperatures provide more energy for storms that develop at sea. The scientific consensus is that this will lead to fewer but more intense tropical cyclones globally. Evidence exists that the observed expansion of the tropics since approximately 1979 is accompanied by a pronounced poleward migration of the latitude at which the maximum intensities of storms occur. This will certainly affect coastal areas that have not been exposed previously to the dangers caused by tropical cyclones. Ultraviolet radiation and the ozone layer The ultraviolet (UV) radiation emitted by the sun in the UV-B range (280-315 nanometres wavelength) has a wide range of potentially harmful effects, including the inhibition of primary production by phytoplankton and cyanobacteria, changes in the structure and function of plankton communities and alterations of the nitrogen cycle. The ozone layer in the Earth’s stratosphere blocks most UV-B from reaching the ocean’s surface. Consequently, stratospheric ozone depletion since the 1970s has been a concern. International action (under the Montreal Protocol on Substances that Deplete the Ozone Layer) to address that depletion has been taken, and the situation appears to have stabilized, although with some variation from year to year. Given those developments and the variations in the water depths to which UV-B penetrates, a consensus on the magnitude of the ozone-depletion effect on net primary production and nutrient cycling has yet to be reached. There is, however, a potential effect of ultraviolet on nanoparticles.", "Regulating services of marine and coastal ecosystems Oceans perform fundamental regulating services. They influence biologically mediated processes, such as carbon fixation and oxygen release, enabling climate mitigation and regulation. Similarly, coastal fringes perform a key role in sequestering carbon. Those services have an indirect use value for humans as they enable the maintenance of favourable and stable climate conditions (e.g., temperatures and precipitation) to which livelihood activities have adapted (e.g., crop cultivations), the preservation of human health, and infrastructure and other assets on which livelihoods depend. The role of coastal ecosystems in controlling pests and animal populations through trophic-dynamic relations and supporting pollination helps to keep at bay pests and diseases that can have an impact on cultivations, aquaculture activities and, potentially, human health. Coastal ecosystems play an important role in the prevention of coastal erosion and can act as both shoreline stabilization and protection against storms, attenuating the strength of the waves and reducing the vulnerability of coastal settlements to sea surges and flooding events. For example, it was estimated that the Indian Ocean tsunami of 2004 caused greater damage to areas that had been converted to shrimp ponds and other uses than those where the mangrove had remained intact (FEnvironmental Justice Foundation, 2006) and that, overall, the thicker the mangrove fringes were, the greater the protection to economic activity that they offered (Hochard and others, 2019). Albeit to a lesser extent, coral reefs, seagrass beds and other vegetated coastal ecosystems can also have a significant impact in dissipating wave action and offering shoreline protection (Spalding and others, 2014) provided that they are in a healthy state themselves. Supporting services of marine and coastal ecosystems Photosynthesis occurring in marine and coastal ecosystems enables the conversion of solar energy into plants and animals and the maintenance of the net primary productivity of the ecosystems. Coastal ecosystems perform a key role in maintaining biodiversity and suitable reproductive habitats and nursery grounds for aquatic species. The ecological niches and refuge for wild animals and plants that they provide directly support the provisioning services of marine and coastal ecosystems. For example, seagrass beds in the Mediterranean are estimated to contribute 30 to 40 per cent of the value of commercial fisheries landings and approximately 29 per cent of recreational fisheries expenditure (Jackson and others, 2015). Coastal ecosystems also act as pollution sinks, enable the storage and recycling of nutrients and support water cycling.", "In the present chapter, the current physical and chemical state of the ocean and its trends are analysed using seven key climate change indicators: Sea level.Sea level integrates changes occurring in the Earth’s climate system in response to unforced climate variability, as well as natural and anthropogenic influences. It is therefore a leading indicator of global climate change and variability. Ocean circulation. Ocean circulation plays a central role in regulating the Earth’s climate and influences marine life by transporting heat, carbon, oxygen and nutrients. The main drivers of ocean circulation are surface winds and density gradients (determined by ocean temperature and salinity), and any changes in those drivers can induce changes to ocean circulation. Sea temperature and ocean heat content. The rapid warming of the global ocean over the past few decades has affected the weather, climate, ecosystems, human society and economies (Intergovernmental Panel on Climate Change, 2019). More heat in the ocean is manifested in many ways, including an increasing interior ocean temperature (Cheng and others, 2019b), a rising sea level caused by thermal expansion, melting ice sheets, an intensified hydrological cycle, changing atmospheric and oceanic circulations and stronger tropical cyclones with heavier rainfall (Trenberth and others, 2018). Salinity. With the advent of improved observational salinity products, more attention has been paid to ocean salinity in Intergovernmental Panel on Climate Change assessment reports (fourth report, Bindoff and others, 2007; and fifth report, Rhein and others, 2013) and in the first World Ocean Assessment (United Nations, 2017). Changes to ocean salinity are important given that the global ocean covers 71 per cent of the Earth’s surface and contains 97 per cent of the Earth’s free water (Durack, 2015). Any global water changes will be expressed in the changing patterns of ocean salinity, a water cycle marker of the largest reservoir of the climate system. Ocean acidification. Rising concentrations of CO2 in the atmosphere also have a direct effect on the chemistry of the ocean through the absorption of CO2. The ocean absorbed roughly 30 per cent of all CO2 emissions in the period from 1870 to 2015 (Le Quéré and others, 2016; Gruber and others, 2019), and the increased CO2 level in the water lowers its pH through the formation of carbonic acid. Dissolved oxygen. Variations in oceanic oxygen have a profound impact on marine life, from nutrient cycling to pelagic fish habitat boundaries (e.g., Worm and others, 2005; Diaz and Rosenberg, 2008; Stramma and others, 2012; Levin, 2018) and can influence climate change through emissions of nitrous oxide, a potent greenhouse gas (e.g., Voss and others, 2013). Sea ice. Sea ice in the polar regions covers about 15 per cent of the global ocean and affects the global climate system through its influence on global heat balance and global thermohaline circulation. In addition, sea ice has a high albedo, reflecting more sunlight than the liquid ocean, and its melt releases fresh water, which slows the global ocean conveyor belt (the constantly moving system of deep-ocean circulation driven by temperature and salinity). The present chapter, using those indicators, contains details of the impacts of climate change on the physical and chemical state of the ocean and its evolution and spatial patterns. It is to be read in conjunction with chapter 9, in which extreme climate events (marine heatwaves, extreme El Niño events and tropical cyclones) are analysed and the pressures of some of the physical and chemical changes on marine ecosystems and human populations are described in more detail. Some additional aspects are covered in the section on high-latitude ice in chapter 7 on trends in the state of biodiversity in marine habitats.", "Looking in more detail at the services that the ocean provides, we can break them down into three main categories. First, there are the economic activities in providing goods and services which are often marketed (fisheries, shipping, communications, tourism and recreation, and so on). Secondly, there are the other tangible ecosystem services which are not part of a market, but which are vital to human life. For example, marine plants (mainly tiny floating diatoms) produce about 50 per cent of atmospheric oxygen. Mangroves, salt marshes and sea grasses are also natural carbon sinks. Coastal habitats, including coral reefs, protect homes, communities and businesses from storm surges and wave attack. Thirdly, there are the intangible ecosystem services. We know that the ocean means far more to us than just merely the functional or practical services that it provides. Humans value the ocean in many other ways: for aesthetic, cultural or religious reasons, and for just being there in all its diversity – giving us a “sense of place” (Halpern et al., 2012). Not surprisingly, given the resources that the ocean provides, human settlements have grown up very much near the shore: 38 per cent of the world’s population live within 100 km of the shore, 44 per cent within 150 km, 50 per cent within 200 km, and 67 per cent within 400 km (Small et al 2004). All these marine ecosystem services have substantial economic value. While there is much debate about valuation methods (and whether some ecosystem services can be valued) and about exact figures, attempts to estimate the value of marine ecosystem services have found such values to be on the order of trillions of US dollars annually (Costanza, et al., 1997). Nearly three-quarters of this value resides in coastal zones (Martínez, et al., 2007). The point is not so much the monetary figure that can be estimated for non-marketed ecosystem services, but rather the fact that people do not need to pay anything for them – these services are nature’s gift to humanity. But we take these services for granted at our peril, because the cost of replacing them, if it were possible to do so, would be immense and in many cases, incalculable." ]

[ "Improvement in crude oil prices amid signs of an economic recovery throughout the world has led to an increase in the global drilling market. Schlumberger Ltd. Chief Executive Officer Andrew Gould said he was hopeful that oil producers might increase spending in 2010 if they feel oil prices will stay at $80/bbl. Parker Drilling runs 29 land rigs and a fleet of barge rigs in the Gulf of Mexico. Parker Drilling's Operations and Maintenance division witnessed increasing demand for its customized drilling packages in which the contractor run customer-owned rigs. The newbuild ultradeepwater drill-ship Petrobras 10000 has started operations off Angola under a 10-year drilling contract. Transocean Ltd. of Zug, Switzerland, has contracted with the P&M Drilling International BV joint venture of Petroleo Brasileiro SA and Mitsui to buy the rig under a 20-year capital lease contract." ]

[ "A720" ]

[ "In a scenario of huge investments in the quest for new oil and natural gas discoveries, the oil industry has reached a consensus: no easy fields to be developed remain undiscovered, especially in offshore environments. New and old challenges on well drilling such as drilled extensions over 6000 m, sub-salt drilling, very narrow operational windows, operational problems like lost of circulation, stuck pipe, and kicks are aggravated when drilling in high pressure and high temperature (HPHT) environments. In the world's exploratory context, the occurrence of HPHT areas is an increasing trend. It is the materialization of the worst case scenario for well drilling and safety, formed by great challenges and operational, environmental, and economic risks. Field experience has shown that the economical risks have been overshadowed by the great premium target: increments on reserves. However, if the well safety aspect is dealt with the conventional approach, the oil industry is at risk of losing its investments, causing great impacts to the environment and also to the company's image. Since HPHT well construction costs are so much higher than those of traditional wells, the scope of knowledge and science on well safety, once limited to kick prevention and well control contingencies, are now an integral part of the technical and economic feasibility of well construction. Within this context, this work surveys the best HPHT techniques and procedures practiced by the oil industry, presents the new researches and trends and shares some valuable lessons learned on Petrobras' operations in Brazil and throughout the world.", "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion.", "Increased use of ocean space Offshore hydrocarbon industries The growth of the offshore oil and gas industry has increased the demand by that sector for access to ocean space within areas under national jurisdiction (including space for pipelines to bring the hydrocarbon products ashore). More than 620,000 km² (almost 9 per cent) of the exclusive economic zone (EEZ) of Australia is subject to oil and gas leases. In the United States, about 550,000 km² of the whole EEZ is subject to current oil and gas leases, including 470,000 km² in the Gulf of Mexico, representing 66 per cent of the EEZ of the United States in that area. When such significant proportions of the ocean areas under national jurisdiction are thus subject to such prior claims, overlaps in sectoral interests become inevitable. Offshore mining Offshore mining is currently confined to shallow-water coastal regions, although growing exploration activity is focused on deep-sea minerals. About 75 per cent of the world’s tin, 11 per cent of gold, and 13 per cent of platinum are extracted from the placer deposits near the surface of the coastal seabed, where they have been concentrated by waves and currents. Diamonds are also an important mining target. Aggregates (sand, coral, gravel and seashells) are also important: the United Kingdom, the world’s largest producer of marine aggregates, currently extracts approximately 20 million tons of marine aggregate per year, meeting around 20 per cent of its demand. Those activities are all concentrated in coastal waters, where other demands for space are high. Deep-water deposits that have generated continuing interest, but are not currently mined, include ferromanganese nodules and crusts, polymetallic sulphides, phosphorites, and methane hydrates. Demands for deep-sea space are likely to develop in the future.", "Since the first World Ocean Assessment (United Nations, 2017a), the offshore oil and gas sector has continued to expand globally, in particular in deep and ultradeep waters. The use of tension leg platforms, spars and floating production, storage and offloading (FPSO) systems are key to such expansion. In the next decade, frontier regions such as the eastern Mediterranean, the east coast of South America (Brazil and Guyana), and the west coast of Africa could be the major growth drivers for offshore oil and gas exploration and production. There is an upward trend in decommissioning activity, in particular in mature regions, such as the North Sea and the Gulf of Mexico. Exploration and production practices continue to evolve to minimize potential impacts on the surrounding environment. The creation of regulatory capacity to manage offshore resources effectively, especially in frontier regions, requires significant commitment and long-term institutional investment. Technological innovation and sophisticated industrial capability built over decades by the offshore oil and gas sector are benefiting the emergence of the marine renewable energy (MRE) industry. A major thrust to the offshore hydrocarbon sector since the first Assessment is technological advancement in analysing offshore exploration and production data to enhance operational and financial efficiencies.", "Advances in knowledge and capacity New exploration and development in offshore areas remain a major source of increasing global oil and gas production. Technological advances in the past decade have encouraged exploration in deep and ultradeep waters further away from shore and enabled the discovery of significant new reserves. The water depth capabilities for offshore exploration increased from about 3,050 m to more than 3,350 m between 2010 and 2018, while production capability using floating platforms reached almost 2,900 m in 2018, up from 2,438 m in 2010 (Barton and others, 2019). Such technological advances have in part enabled the expansion of the offshore oil and gas sector to new regions, including the eastern Mediterranean and areas off the coast of Guyana. There have also been advances in understanding the potential environmental and social impacts of exploration and production activities on the surrounding environment and in the development of new approaches to mitigate impacts. For example, the United Kingdom of Great Britain and Northern Ireland has created a Marine Noise Registry to record human activities that produce loud impulsive noise (10 Hz– 10 kHz) in the seas around its territory. This initiative intends to create baseline data and to quantify the pressure on the environment from anthropogenic activities associated with hydrocarbon exploration and development, including seismic surveys, sub-bottom profiling and pile driving. Similarly, the SERPENT project, which stands for “Scientific and Environmental ROV (remotely operated vehicle) Partnership using Existing iNdustrial Technology”, is an example of international collaboration among the scientific community, environmental regulators and the oil and gas industry to gather and provide baseline information on ecosystems around offshore oil and gas installations using cutting-edge remotely operated vehicles that can operate in the deep ocean (SERPENT Project, 2020). More recently, the offshore oil and gas industry has contributed to the MRE sector by providing expertise for the construction, maintenance and decommissioning of utility-scale offshore wind projects. The design and structural engineering concepts for the floating wind turbines, which can significantly expand the development of wind power in deeper waters associated with higher wind resources, are largely influenced by deepwater oil and gas installations (International Renewable Energy Agency, 2016).", "The 3 million bpd of crude oil produced globally in deep waters represent only 4% of the total explored volume by the petroleum industry. However, the expectation of a large increase in demand for energy in the coming decades is attracting new investments by oil companies. Although a matter that dominates the scene in Brazil, E&P in deep waters has marginal international participation and encounters unexplored frontiers. The global oil industry has discovered about 60,000 million bbl of petroleum in deep waters, half of which since 1995 has occurred in Brazil, Gulf of Mexico, and Western Africa, according to one study. In a study by the Total company, 90% of the global reserves of petroleum in deep waters of about 50,000 million bbl, are to be found in the \"Golden Triangle\" of the petroleum industry, namely, Brazil, Gulf of Mexico, and Western Africa. There is a consensus that the high prices for petroleum are an indication that exploration for petroleum in deep waters off Latin America may significantly increase the reserves of the region. The world consumes about 75,000 million bpd of crude oil and 6.5 MMM cu m/day of natural gas. Hardly some 3 MM bpd of crude oil are produced in deep waters or 4% of the total volume explored. In the coming three decades the demand for energy is expected to increase by two thirds and between now and 2015 the production in deep waters could triple reaching over 8 MM bpd. In the Offshore Magazine study on FPSO, of the 106 FPSO now operating in 23 countries, 16 are in Brazil. Of the 106 FPSO, 13 operate in waters at greater than 1,000 m depth. Of these 13, 7 are in Brazil, 4 in Angola, and 2 in Nigeria. In 2006, 21 FPSO are being built or being converted in the world and 56 FPSO are being bid for, will be bid for, or are in the final stage of conception and design. The large part of these projects is Brazilian. From now to 2010, 2,011 new underwater production projects will be initiated in Brazil that will include about 20 new platforms. In addition to offshore Brazil, Petrobras is active offshore Argentina and Colombia and has joined with large companies to explore in deep waters in the Gulf of Mexico.", "Distribution of ocean benefits and disbenefits Developments in tourism Tourism has generally been increasing fairly steadily for the past 40 years (with occasional setbacks or slowing down during global recessions). In 2012, international tourism expenditure exceeded 1 billion dollars for the first time. Total expenditure on tourism, domestic as well as international, is several times that amount. The direct turnover of tourism contributed 2.9 per cent of gross world product in 2013, rising to 8.9 per cent when the multiplier effect on the rest of the economy is taken into account. The Middle East is the region where tourism plays the smallest part in the economy (6.4 per cent of GDP, including the multiplier effect), and the Caribbean is the region where it plays the largest part (13.9 per cent of GDP, including the multiplier effect). Most reports of tourism revenues do not differentiate revenues from tourism directly related to the sea and the coast from other types of tourism. Even where tourism in the coastal zone can be separated from tourism inland, it may be generated by the attractions of the sea and coast or its maritime history, as it may be based on other attractions not linked to the marine environment. Consequently, the value of ocean-related tourism is a matter of inference. However, coastal tourism is a major component of tourism everywhere. In small island and coastal States, coastal tourism is usually predominant because it can only take place in the coastal zone in those countries. Particularly noteworthy is the way in which international tourism is increasing in Asia and the Pacific, both in absolute terms and as a proportion of world tourism. This implies that pressures from tourism are becoming of significantly more concern in those regions. Tourism is also a significant component of employment. Globally, it is estimated that, in 2013, tourism provided 3.3 per cent of employment, when looking at the number of people directly employed in the tourism industry, and 8.9 per cent when the multiplier effect is taken into account. In the different regions, the proportion of employment supported by tourism is approximately the same as the share of GDP contributed by tourism, although, again, what proportion is based on the attractions of the sea and coast is not well known.", "Increasing inputs of harmful material Offshore hydrocarbon industries Major disasters in the offshore oil and gas industry have a global, historical recurrence of one about every 17 years. The most recent is the Deepwater Horizon blowout of 2010, which spilled 4.4 million barrels (about 600,000 tons) of oil into the Gulf of Mexico. The other main harmful inputs from that sector are drilling cuttings (contaminated with drilling muds) resulting from the drilling of exploration and production wells, “produced water” (the water contaminated with hydrocarbons that comes up from wells, either of natural origin or through having been injected to enhance hydrocarbon recovery), and various chemicals that are used and discharged offshore in the course of exploration and exploitation. Those materials can be harmful to marine life under certain circumstances. However, it is possible to take precautions to avoid such harm, for example by prohibiting the use of the most harmful drilling muds, by limiting the proportion of oil in the produced water that is discharged or by controlling which chemicals can be used offshore. Such regulation has been successfully introduced in a number of jurisdictions. Nonetheless, given the growth in exploration and offshore production, there is no doubt that those inputs are increasing over time, even though exact figures are not available globally. Produced water, in particular, increases in quantity with the age of the field being exploited. Offshore mining The environmental impacts of near-shore mining are similar to those of dredging operations. They include the destruction of the benthic environment, increased turbidity, changes in hydrodynamic processes, underwater noise and the potential for marine fauna to collide with vessels or become entangled in operating gear.", "Technological changes in drilling and production, including emerging technologies Offshore drilling and production continue to benefit from significant technological advances. Sophisticated techniques now make it possible to drill multiple wells from a single drilling platform, while advances in real-time fibre-optic monitoring of the well bore is optimizing the reservoir performance and mitigating equipment failure risks (Beaubouef, 2019). Similarly, the use of predictive analytics and artificial intelligence tools is enhancing data analysis for detecting equipment breakdown and improving operational efficiency (Husseini, 2018). The use of FPSO vessels enables drilling in areas further offshore and without ready access to a pipeline network to transport oil and gas onshore. It has also opened previously inaccessible hostile environments, in particular in the higher latitudes and in the Arctic, to exploration and development. FPSO vessels are equipped to store hydrocarbons onboard and periodically transfer their load to tankers for transportation onshore. They can also disconnect from their moorings in case of adverse weather conditions, such as cyclones and hurricanes. Once the reservoirs are depleted, an FPSO vessel can be redeployed to a new prospective site. The global market for FPSO vessels is currently boosted by large investments in deepwater exploration and development in such areas as the coast of Brazil (Rystad Energy, 2019). Meanwhile, FPSO vessel design is evolving to enhance safety, minimize complexity and reduce fabrication and operation costs (Barton, 2018). Such technological advances have enabled exploration and production at uncharted depths and distance from shore. As of March 2019, the record for an ultradeep water exploration well was in depths of 3,400 m, off the coast of Uruguay, while the record for an operational production platform stood at 2,896 m, in the Gulf of Mexico (Barton and others, 2019).", "Enjoyment of marine wildlife Diving Snorkelling and scuba diving continue to be a significant element in marine tourism, focused on enabling tourists to enjoy underwater wildlife. The substantial growth (about 25 per cent) in the levels of the activity recorded in the period from 2000 to 2013 and reported in the first Assessment has now slowed down but still continues. Based on the statistics of the Professional Association of Diving Instructors, between 2013 and 2019, there was about 6 per cent growth in the number of establishments offering diving training (about 6,600 in 2019), about 1 per cent growth in the number of individual trainers (about 137,000 in 2019) and about an 11 per cent increase in the number of people trained annually (about 1 million in 2019) (Professional Association of Diving Instructors (PADI), 2019). The main interest in diving lies in areas endowed with coral reefs – the corals and other reef biota are spectacular and attract large numbers of tourists who want to see them. In some areas, as recorded in the first Assessment, studies suggest that it is possible to manage coral reef tourism (e.g., by limiting the number of divers in an area, specifying divers’ behaviour and generally increasing divers’ awareness of the problems) compatibly with sustaining the condition and health of the reef. In other areas, however, studies continue to suggest that the interaction of divers with coral is damaging the reefs. A recent study of the coral reefs around the island of Bonaire in the Caribbean part of the Netherlands showed that diving is at levels probably at least twice those considered to be the upper limit beyond which damage is likely to occur (see Hawkins and Roberts, 1997), and that damage, albeit largely unintentional, is occurring but could be controlled by better management measures (Jadot and others, 2016). As part of the decommissioning of offshore installations, significant numbers of disused installations are being used to create artificial reefs. In the Gulf of Mexico alone, 532 installations had, by 2018, been used as artificial reefs (Bureau of Safety and Environmental Enforcement of the United States (BSEE), 2020). In 2016, it was estimated that some 600 offshore installations would be decommissioned between 2017 and 2021. Not all of them were intended as places for divers to explore, but a substantial proportion are being used in that way (Van Elden and others, 2019). A new area of interest for scuba diving is emerging in the form of diving over muddy substrates, known as “muck diving”, which focuses on finding rare, cryptic species that are seldom seen on coral reefs. A recent study investigated the value of “muck diving”, its participant and employee demographics and potential threats to the industry. Results indicate that “muck diving” tourism is worth more than $150 million annually in Indonesia and the Philippines combined. It employs over 2,200 people and attracts more than 100,000 divers per year (De Brauwer and others, 2017)." ]

[ "This long-term study, performed during the years 2003-2005 and 2008-2009, investigated the carbon (C), nitrogen (N), and phosphorus (P) contents of the phyto- and zooplankton communities and the nutrient regime of Cabo Frio Bay, SE Brazil. The information intends to serve as baseline of the plankton C, N, and P stoichiometry for the calibration of biogeochemical and ecological models in support to future findings related to the local and regional phenomena of climatic change. Cabo Frio Bay is a small semienclosed system set adjacent to a region subject to sporadic coastal upwelling. Zooplankton exhibited average annual C, N, and P contents of 11.6 ± 6.9 %, 2.8 ± 1.8 %, and 0.18 ± 0.08 %, and phytoplankton (>20 ?m) 6.8 ± 6.0 %, 1.6 ± 1.5 %, and 0.09 ± 0.08 %, respectively. The C/N/P ratios correspond to the lowest already found to date for a marine environment. The low C contents must have been brought about by a predominance of gelatinous zooplankton, like Doliolids/ Salps and also Pteropods. Average annual nutrient concentrations in the water were 0.21 ± 0.1 ?M for phosphate, 0.08 ± 0.1 ?M for nitrite, 0.74 ± 1.6 ?M for nitrate, and 1.27 ± 1.1 ?M for ammonium. N/P ratios were around 8:1 during the first study period and 12:1 during the second. The plankton C/N/P and N/P nutrient ratios and elemental concentrations suggest that the system was oligotrophic and nitrogen limited. The sporadic intrusions of upwelling waters during the first study period had no marked effect upon the systems metabolism, likely due to dilution effects and the short residence times of water of the bay." ]

[ "A1936" ]

[ "Data presented in this investigation refer to studies integrating palynofacies and organic geochemistry analyses that were performed on 51 samples of PEC-41-SE-9 well, located in the Sergipe Basin, Eastern Brazilian continental margin. It was evaluated the potential for oil generation, identifying the type and degree of maturation of the organic matter. Optical analyzes show that the organic matter is composed in greater proportion by amorphous organic matter in good preservation, with high fluorescence. It also presents a 67% average concerning the total composition of the kerogen. The phytoclasts usually are well preserved in almost all the section. The palynomorphs are composed of an association, predominantly, of spores and pollen grains of genus Classopollis, featuring a predominantly arid to semi-arid climate environment at deposition time. Presence of the dinoflagellate in the upper section displays the first marine ingressions that happened in the end of Aptian. Based on the qualitative and quantitative results of kerogen, it was possible to characterize three distinct palynofacies, in which the palynofacies I had the best features for quality and preservation of organic matter. The results show total organic carbon values up to 6.39% and Rock-Eval pyrolysis data pointed to the type II kerogen rich in organic matter suitable for the formation of hydrocarbon accumulations. The hydrogen index is found between 200 and 550 mg HC/g of total organic carbon, which shows good potential for oil and gas generation. Spore color index data conclude that the organic matter is found predominantly on the immature maturation phase, with SCI values of 4.0 to 4.5, corroborating with data of maximum temperature, of up to 432° C.", "Oceanographic features influence the early stages of fish to a high degree. We investigated the influence of continental shelf-slope gradient on the ichthyoplankton composition and distribution off Northeastern Brazil. Two oceanographic campaigns were performed during July-August 2010 and 2012. The samplings were performed along three transects composed by three stations, covering the continental shelf and slope areas. Abiotic data were obtained by an ADCP and a CTD. The ichthyoplankton was sampled through diurnal and nocturnal hauls using a 500-µm bongo net from 200 m to the surface. A total of 1634 larvae and 4023 eggs, representing 91 genera and 76 species, were collected. Higher concentrations of fish eggs were found on the continental shelf, probably because of the North Brazil Undercurrent flux. Higher concentrations of larvae were found at night and could be associated with net avoidance or natural variation. Neritic, oceanic and transition groups of species association were determined. Larvae of neritic, demersal and pelagic fishes prevailed on the continental shelf, while larvae of oceanic, mesopelagic and bathypelagic fishes on the continental slope. Melanostomiidae, Scorpaena sp., Lestidium atlanticum, Lampadena sp. and Diaphus sp. were identified as indicators of the continental slope.", "Anthropogenic nutrient enrichment in estuaries induces high phytoplankton production, contributing to coastal eutrophication. Abundant natural banks of filter feeders, such as bivalves, in downstream areas may contribute to reducing symptoms of eutrophication by decreasing phytoplankton biomass and amount of material subjected to microbial regeneration. The current concern is to what extent bivalves can control water quality and how environmental parameters can influence the filtration process and vice versa. In the present study Crassostrea rhizophorae (Guilding, 1818) grazing ability on suspended particles in their natural environment was determined in situ, using the biodeposition method and uniquely constructed sediment traps. Additionally the effect of body size on effective clearance rate (ECR) was examined using three different size groups. The experiment was conducted in the Piraquê-açu/Piraquê-mirim estuary system, (Aracruz, ES, Brazil) during the second week of June 2012 (dry season). Environmental parameters were measured together with total particulate matter (TPM, mg L-1) and chlorophyll a analysis (CHL, ?g L-1) at the beginning and at the end of the experiment. Average values recorded for TPM and CHL were 5.79 mg L-1 and 2.55 ?g L-1 respectively with very high organic seston fraction (80%). The reported effective clearance rate (ECR, in litres per hour) was 17.99 L h-1g-1 dry weight (DW), one of the highest reported in literature and can be associated with a high detritus content and different feeding strategies in comparison to bivalves residing in temperate environments. Weight and length (height) relationship were closely correlated (r = 0.73) however, clearance rate (ECR) standardized to 1 g dry tissue weight did not vary significantly among different size classes. High ECR at high particulate organic matter (POM, %) supports the belief that bivalves can exhibit ECR flexibility according to food quality.", "The distribution of planktonic foraminifera in box-core tops under the influence of a western boundary upwelling system along the southeastern Brazilian continental margin was examined to evaluate the similarity percentage (SIMPER) and to create a biofacies model for paleoenvironmental applications. Species associated with warm and oligotrophic water were distributed in the Rio de Janeiro sector of the Campos Basin, while productive water species were most abundant in the Rio de Janeiro sector of the Santos Basin, and cold-water species were most abundant in the Cabo Frio Upwelling System (CFUS). Four major biofacies are associated with the oceanographic setting of the CFUS: one from the Campos Basin (A - Brazil Current front), one from the Santos Basin (B - mixture of coastal and oceanic waters), and two associated with the Cabo Frio High in the northern biofacies (C) and southern biofacies (D). The distribution of biofacies C and D was associated with temperature differences. Biofacies C represents a mixture of upwelling and tropical waters, while biofacies D represents a mixture of cold, nutrient-rich and Santos Basin waters. These biofacies were also defined in core CF10-01B, in which six main paleoceanographic phases were characterized during the last 9 cal kyr, predominantly showing alternating dominance between biofacies C and D From 9.0 to 5.0 cal kyr before the present (BP), the system was dominated by biofacies C. Between 4.0 and 3.5 cal kyr BP, biofacies D was dominant. Between 3.5 and 2.5 cal kyr BP, a strong influence of coastal waters and weakened upwelling activity were indicated by the dominance of biofacies B + C + D. The last 2.5 cal kyr was dominated by biofacies D. The SST in this core was reconstructed using the Modern Analog Technique (MAT), which revealed 0.35. °C of variability, indicating no SST changes during the Holocene. The weak sensitivity of the MAT was due to the interplay among different oceanographic features.", "Given the importance of copepods in pelagic food webs, short- and medium-scale temporal variation in the distribution and abundance of copepods of the genus Pseudodiaptomus was investigated in an oligo-mesohaline estuary (Paracauari) in northern Brazil. This system is characterized by high local hydrodynamics and nutrient input from the Paracauari River and Marajo Bay, and marked seasonal variation in rainfall levels. The temporal variation in the abundance of copepods was analyzed in the context of some hydrological variables tide height, salinity, temperature, pH, and concentrations of suspended particulate material, dissolved oxygen and chlorophylla. Samples were collected in 2009 at a fixed station (00° 44'15.4 '' S, 48° 31'07.5 '' W) every 3 hours during a nycthemeral cycle in the neap and spring tides of February, May, June, August, November, and December. Zooplankton samples were collected using horizontal hauls of plankton nets with a 120 pm mesh. Following identification, the abundance and density of Pseudodiaptomus copepods were determined. Data were analyzed using an ANOVA (to assess the significance of diurnal, fortnightly and seasonal variations), PCA, and Bray-Curtis similarity. Four species were identified: Pseudodiaptomus richardi, Pseudodiaptomus marshi, Pseudodiaptomus gracilis, and Pseudodiaptomus acutus. The results indicate that variation in composition and density of the Pseudodiaptomidae copepods in the Paracauari estuary is determined by the interactive effect of the freshwater influx from Marajo Bay, tides, and the rainfall regimen, which modulate local salinity. The absence of diurnal variation in species composition and density was determined by the high local hydrodynamics, which provoke the constant mixing of the estuary's water.", "Petrographic, mineralogical, elemental, isotopic and fluid inclusion analyses were integrated to unravel the diagenetic evolution of Brazilian Pre-Salt lacustrine carbonate reservoirs of northern Campos Basin, southeast Brazilian margin. Detailed thin section and cathodoluminescence petrography, scanning electron microscopy and electron microprobe analyses established a paragenetic evolution of diagenetic processes and products, comprising extensive dolomitization, silicification, and dissolution. A paragenesis including saddle dolomite, macrocrystalline calcite, mega-quartz, Sr-barite, celestine, fluorite, dickite, sphalerite, galena, and other metallic sulfides filling fractures and dissolution porosity, and aqueous fluid inclusions with homogenization temperatures of 92–152 °C and salinities between 13 and 26 wt % eq. NaCl characterized a hydrothermal system with some analogy to carbonate-hosted Pb–Zn Mississippi Valley (MVT) and Irish-type deposits. Petroleum inclusions and solid bitumen testify atypical oil generation and migration, associated with the hydrothermal flow. The host Pre-Salt spherulitic and fascicular carbonates present highly radiogenic 87Sr/86Sr ratios, indicating strong interaction with continental crust materials. Hydrothermal phases show ?18O values more negative than syngenetic and diagenetic carbonates. The ?13C values are interpreted as result of interaction between the hydrothermal fluids and the host rocks. The combined data set provides clear evidence of intense hydrothermal alteration of northern Campos Basin Pre-Salt reservoirs at deep-burial conditions (>2 km), possibly related to Late Cretaceous or more probably Paleogene magmatic activity. Mixed-sourced fluids bearing a basinal signature fed the hydrothermal system and promoted dissolution of the host rocks. The hydrothermal alterations had strong impact on the porosity, permeability, and heterogeneity, contributing, together with the associated fracturing, to the excellent production performance of the Pre-Salt reservoirs.", "Brazilian oceanic islands are areas of great environmental, scientific, economic and strategic interest for the country. A better understanding of the thermohaline and hydrodynamic properties is fundamental to complement studies of chemical and biological processes active on the Fernando de Noronha archipelago, located between 03° 52'S and 32° 25'W. The aim of this work was to verify the coastal thermohaline behavior of the most inhabited part of the island, on a seasonal and spatial scale and how it is associated with the nutrient distribution data. Four campaigns were conducted in 2013 and 2014, two during the wet season and two during the dry season. For each period, data were collect at five stations. The results show that during the rainy season temperature increases and salinity decreases in the surface layer. Spatially no large differences are observed. Regarding to nutrient concentration, seasonal concentrations are quite homogeneous in the waters of the archipelago region. The coastal region was characterized by tropical mass water.", "Impacts of climate change and related changes in the atmosphere Plankton Phytoplankton and marine bacteria carry out most of the primary production on which food webs depend. The climate-driven increases in the temperature of the upper ocean that had been predicted are now causing shifts in phytoplankton communities. This may have profound effects on net primary production and nutrient cycles over the next 100 years. In general, when smaller plankton account for most net primary production, as is typically the case in oligotrophic open-ocean waters (that is, areas where levels of nutrients are low), net primary production is lower and the microbial food web dominates energy flows and nutrient cycles. Under such conditions, the carrying capacity for currently harvestable fish stocks is lower and exports of organic carbon, nitrogen and phosphorus to the deep sea may be smaller. On the other hand, as the upper ocean warms, the geographic range of nitrogen-fixing plankton (diazotrophs) will expand. This could enhance the fixation of nitrogen by as much as 35-65 per cent by 2100. This would lead to an increase in net primary production, and therefore an increase in carbon uptake, and some species of a higher trophic level may become more productive. The balance between those two changes is unclear. A shift towards less primary production would have serious implications for human food security and the support of marine biodiversity.", "Purpose: In order to assess the impact of anthropogenic activities on carbon and nutrient accumulation, total organic carbon (TOC), nitrogen (TN), and phosphorus (TP) accumulation rates were examined in a 210Pb-dated mangrove sediment core from Sepetiba Bay, Brazil, a coastal region impacted by multiple environmental changes during the previous century. Materials and methods: A 50-cm length sediment core was collected from a mangrove forest in Sepetiba Bay. Sediment subsamples were analyzed to measure TOC, TN, ?13C, and ?15N using an elemental analyzer attached to an isotope ratio mass spectrometer Thermo Finnigan Model Delta Plus XP, whereas colorimetric analysis were used to measure TP. For 210Pbex analyses, gamma-ray measurements were performed in a semiplanar intrinsic germanium high purity coaxial detector, coupled to a multichannel analyzer, whereas the sediment accumulation rate (SAR) was calculated according to the constant initial concentration (CIC) method. Also, carbon and nutrient fluxes were calculated using SAR and TOC, TN, and TP contents, whereas statistical differences were evaluated by ANOVA + Tukey HSD analysis with previous data normalization. Results and discussion: The calculated sedimentation rate (~ 8.1 mm year?1) since the early 1900s was up to threefold higher than the global mean determined for mangrove forests (~ 2.8 mm year?1) and the regional sea level rise (~ 3.2 mm year?1). Significantly higher TOC, TN, and TP fluxes, up to nearly 1000, 90, and 15 g m?2 year?1, respectively, were observed after the water diversion from a nearby drainage basin in the 1950s and an increase in sewage effluent input, which increased in the early 1990s. After this period, lighter ?13C values (~ ? 25‰) indicate an increased importance of the terrestrial organic matter source, while lower TOC:TN ratios (~ 11) and heavier ?15N values (~ + 9‰) suggest an increased influence of anthropogenic fertilization on inorganic nitrogen accumulation. Conclusions: The significantly higher accumulation rates during the last decades evidenced the role of mangrove sediments as sinks for anthropogenically enhanced inputs of carbon and nutrients. Also, studies on carbon and nutrient accumulation evidenced the need for further research in eutrophic coastal areas.", "In this study, we use inorganic (metal) and organic (bulk and molecular) markers in sediment samples of the south-eastern Brazilian margin to investigate the response of geochemical fingerprints to the complex hydrodynamic processes present in the area. Results indicate the potential of export of terrigenous siliciclastic and organic constituents to the upper slope, even in an area with limited fluvial supply. Metal contents and especially the ln(Ti / Al) and ln(Fe / K) ratios make it possible to recognise the extension of shelf sediments toward the upper slope. Potassium, here expressed as ln(K / Sc) and ln(K / Al) ratios used as proxies of illite-kaolinite variations, proved to be an important parameter, especially because it allowed us to decipher the imprint of the northward flow of the Intermediate Western Boundary Current (IWBC) in comparison to the southward flows of the Brazil Current (BC) and Deep Western Boundary Current (DWBC). Using organic matter analyses, we were able to evaluate the extent of terrestrial contributions to the outer shelf and slope, even without the presence of significant fluvial input. In addition, molecular markers signify a slight increase in the input of C4-derived plants to the slope sediments, transported from distant areas by the main alongshore boundary currents, indicating that the terrestrial fraction of the organic matter deposited on the slope has a distinct origin when compared to shelf sediments." ]

[ "Ocean warming and land ice melt are the main causes of present-day accelerating global mean sea level rise. The global mean sea level has been rising since 1993 (the altimetry era) at a mean rate of 3.1 ± 0.3 mm per year, with a clear superimposed acceleration of approximately 0.1 mm per year. Satellite altimetry has also revealed strong regional variability in the rates of sea level change, with regional rates up to two or three times greater than the global mean in some regions. Owing to global warming, many circulation systems also experience changes. Changes in sea level height, measured with high-precision satellite altimetry, hint at the widening and strengthening of the subtropical gyres in the North and South Pacific. The studies, furthermore, show a poleward movement of many ocean currents, including the Antarctic circumpolar current and the subtropical gyres in the southern hemisphere, as well as western boundary currents in all ocean basins. One of the major ocean current systems, the Atlantic meridional overturning circulation, has already weakened, and it is very likely that it will continue to do so in the future. Impacts that follow such changes include regional sea level rise, changes in nutrient distribution and carbon uptake and feedbacks with the atmosphere. The globally averaged ocean surface temperature data show a warming of 0.62±0.12?°C per century over the period 1900– 2018. In the recent decade (2009–2018), the rate of ocean surface warming is 2.56±0.68?°C c-1. The warming happens in most ocean regions with some areas, such as in the North Atlantic, showing long-term cooling. Since 1955, the upper 2,000 m of the ocean has also exhibited signs of robust warming, as evidenced by the increase in ocean heat content. The spatial patterns of multidecadal salinity changes provide convincing evidence of global-scale water cycle change in the global ocean coincident with warming over the period. The resolved changes are replicated in all observed analyses of long-term salinity changes, and more recently have been reproduced in forced climate model simulations. Those changes are manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and corresponding freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. Similar changes are also seen in the ocean subsurface, with similar patterns of freshening low-salinity waters and enhanced high-salinity waters represented in each of the ocean basins, Atlantic, Pacific and Indian, and across the Southern Ocean." ]

[ "B2024" ]

[ "Impacts of climate change and related changes in the atmosphere Sea-surface temperature The Intergovernmental Panel on Climate Change has reaffirmed in its fifth report its conclusion that global sea-surface temperatures have increased since the late nineteenth century. Upper-ocean temperature (and hence its heat content) varies over multiple time scales, including seasonal, inter-annual (for example, those associated with the El Niño-Southern Oscillation), decadal and centennial periods. Depth-averaged ocean-temperature trends from 1971 to 2010 are positive (that is, they show warming) over most of the globe. The warming is more prominent in the northern hemisphere, especially in the North Atlantic. Zonally averaged upper-ocean temperature trends show warming at nearly all latitudes and depths. However, the greater volume of the ocean in the southern hemisphere increases the contribution of its warming to the global heat content. The ocean’s large mass and high heat capacity enable it to store huge amounts of energy, more than 1,000 times than that found in the atmosphere for an equivalent increase in temperature. The earth is absorbing more heat than it is emitting back into space, and nearly all that excess heat is entering the ocean and being stored there. The ocean has absorbed about 93 per cent of the combined extra heat stored by warmed air, sea, land, and melted ice between 1971 and 2010. During the past three decades, approximately 70 per cent of the world’s coastline has experienced significant increases in sea-surface temperature. This has been accompanied by an increase in the yearly number of extremely hot days along 38 per cent of the world’s coastline. Warming has also been occurring at a significantly earlier date in the year along approximately 36 per cent of the world’s temperate coastal areas (between 30° and 60° latitude in both hemispheres). That warming is resulting in an increasingly poleward distribution of many marine species.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "Impacts of climate change and related changes in the atmosphere Sea-level rise It is very likely that extreme sea-level maxima have already increased globally since the 1970s, mainly as a result of global mean sea-level rise. That rise is due in part to anthropogenic warming, causing ocean thermal expansion and the melting of glaciers and of the polar continental ice sheets. Globally averaged sea level has thus risen by 3.2 mm a year for the past two decades, of which about a third is derived from thermal expansion. Some of the remainder is due to fluxes of freshwater from the continents, which have increased as a result of the melting of continental glaciers and ice sheets. Finally, regional and local sea-level changes are also influenced by natural factors, such as regional variability in winds and ocean currents, vertical movements of the land, isostatic adjustment of the levels of land in response to changes in physical pressures on it and coastal erosion, combined with human perturbations by change in land use and coastal development. As a result, sea levels will rise more than the global mean in some regions, and will actually fall in others. A 4°C warming by 2100 (which is predicted in the high-end emissions scenario in the report of the Intergovernmental Panel on Climate Change) would lead, by the end of that period, to a median sea-level rise of nearly 1 metre above the 1980 to 1999 levels. Ocean acidification Rising concentrations of carbon dioxide in the atmosphere are resulting in increased uptake of that gas by the ocean. There is no doubt that the ocean is absorbing more and more of it: about 26 per cent of the increasing emissions of anthropogenic carbon dioxide is absorbed by the ocean, where it reacts with seawater to form carbonic acid. The resulting acidification of the ocean is occurring at different rates around the seas, but is generally decreasing the levels of calcium carbonate dissolved in seawater, thus lowering the availability of carbonate ions, which are needed for the formation by marine species of shells and skeletons. In some areas, this could affect species that are important for capture fisheries.", "Global surface ocean pH has declined on average by approximately 0.1 since the Industrial Revolution, an increase in acidity of about 30 per cent. Ocean pH is projected to decline by approximately an additional 0.3 over the next century unless global carbon emissions are significantly curtailed. The changes can be observed in extended ocean time series, and the rate of change is likely to be unparalleled in at least the past 66 million years. The time of emergence of the signal varies from 8 to 15 years for open ocean sites and 16 to 41 years for coastal sites, making it necessary to commit to long-term observational records, especially in the coastal zone, where most commercially and culturally important marine resources reside.Oceanic oxygen levels have declined in recent decades, with strong regional variations. While the overall oxygen content has decreased by about 2 per cent in five decades, oxygen in coastal areas or near oxygen minimum zones shows larger variations. Coastal changes are mostly fuelled by riverine run-off, and the open ocean changes are likely related to a combination of changes in ocean circulation and biogeochemical cycles. Temperature-driven solubility decrease is responsible for most near-surface oxygen loss, while other processes have to be accountable for deep-ocean oxygen loss. A further decrease in oxygen in and near oxygen minimum zones can lead to climate feedback through consequent greenhouse gas emissions.Sea ice covers 15 per cent of the global ocean and affects global heat balance and global thermohaline circulation. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. Arctic sea ice extent is declining by -2.7 ± 0.4 per cent c-1 during the winter, and -2.8 ± 2.3 per cent c-1 during the summer. In contrast, trends in total Antarctic sea ice extent are insignificant, 0.6 ± 0.6 per cent c-1 during the summer and 1.1 ± 3.7 per cent c-1 during the winter. Regionally, the spatial distribution of the trends is dramatic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. The spatial distribution of the changes in sea ice is attributed to changes in wind and ocean currents related to the Arctic Oscillation in the northern hemisphere and the Southern Annular Mode and El Niño in the southern hemisphere.", "In the present chapter, the current physical and chemical state of the ocean and its trends are analysed using seven key climate change indicators: Sea level.Sea level integrates changes occurring in the Earth’s climate system in response to unforced climate variability, as well as natural and anthropogenic influences. It is therefore a leading indicator of global climate change and variability. Ocean circulation. Ocean circulation plays a central role in regulating the Earth’s climate and influences marine life by transporting heat, carbon, oxygen and nutrients. The main drivers of ocean circulation are surface winds and density gradients (determined by ocean temperature and salinity), and any changes in those drivers can induce changes to ocean circulation. Sea temperature and ocean heat content. The rapid warming of the global ocean over the past few decades has affected the weather, climate, ecosystems, human society and economies (Intergovernmental Panel on Climate Change, 2019). More heat in the ocean is manifested in many ways, including an increasing interior ocean temperature (Cheng and others, 2019b), a rising sea level caused by thermal expansion, melting ice sheets, an intensified hydrological cycle, changing atmospheric and oceanic circulations and stronger tropical cyclones with heavier rainfall (Trenberth and others, 2018). Salinity. With the advent of improved observational salinity products, more attention has been paid to ocean salinity in Intergovernmental Panel on Climate Change assessment reports (fourth report, Bindoff and others, 2007; and fifth report, Rhein and others, 2013) and in the first World Ocean Assessment (United Nations, 2017). Changes to ocean salinity are important given that the global ocean covers 71 per cent of the Earth’s surface and contains 97 per cent of the Earth’s free water (Durack, 2015). Any global water changes will be expressed in the changing patterns of ocean salinity, a water cycle marker of the largest reservoir of the climate system. Ocean acidification. Rising concentrations of CO2 in the atmosphere also have a direct effect on the chemistry of the ocean through the absorption of CO2. The ocean absorbed roughly 30 per cent of all CO2 emissions in the period from 1870 to 2015 (Le Quéré and others, 2016; Gruber and others, 2019), and the increased CO2 level in the water lowers its pH through the formation of carbonic acid. Dissolved oxygen. Variations in oceanic oxygen have a profound impact on marine life, from nutrient cycling to pelagic fish habitat boundaries (e.g., Worm and others, 2005; Diaz and Rosenberg, 2008; Stramma and others, 2012; Levin, 2018) and can influence climate change through emissions of nitrous oxide, a potent greenhouse gas (e.g., Voss and others, 2013). Sea ice. Sea ice in the polar regions covers about 15 per cent of the global ocean and affects the global climate system through its influence on global heat balance and global thermohaline circulation. In addition, sea ice has a high albedo, reflecting more sunlight than the liquid ocean, and its melt releases fresh water, which slows the global ocean conveyor belt (the constantly moving system of deep-ocean circulation driven by temperature and salinity). The present chapter, using those indicators, contains details of the impacts of climate change on the physical and chemical state of the ocean and its evolution and spatial patterns. It is to be read in conjunction with chapter 9, in which extreme climate events (marine heatwaves, extreme El Niño events and tropical cyclones) are analysed and the pressures of some of the physical and chemical changes on marine ecosystems and human populations are described in more detail. Some additional aspects are covered in the section on high-latitude ice in chapter 7 on trends in the state of biodiversity in marine habitats.", "Marine heatwaves are shown to be increasing in frequency and intensity owing to climate change caused by human activities and are having a mostly negative impact on marine ecosystems. Marine heatwaves and their impacts are projected to increase in the future but those increases can be strongly limited by efforts to mitigate climate change. Forecasting systems may be employed in adapting to the effects of marine heatwaves. Extreme El Niño and La Niña events have been observed but, because they occur infrequently, a human influence has not been detected. Nevertheless, models indicate an increase in the frequency of both phases of the oscillation under future scenarios of global warming. As in the case of marine heatwaves, forecasting systems, which already exist, may be employed in risk management and adaptation. While changes in the frequency and spatial distribution of tropical cyclones are hard to detect in the observational record, studies of individual cyclones have shown a human influence on their intensity, in particular, the associated rainfall. Changes in intensity are projected to increase in the future, with associated impacts on storm surges and coastal infrastructure. Although all coastal cities are already facing rising sea levels, low-lying cities and developing countries that lack the ability to invest in coastal defence measures and natural barrier restoration will suffer damage and losses of a higher degree. Global population studies suggest that people are relocating to coastal areas and will continue to do so, thereby putting more people at risk economically and socially. Although cities are typically centres for innovation and investment, key examples demonstrate the difficulty in solving such complex problems in vulnerable locations. Damage and losses are also driven by existing vulnerabilities in coastal infrastructure and may not be solely attributed to rising sea levels. Rather, increasing sea levels may exacerbate existing issues, increasing risk. The complex interactions of temperature and salinity with nutrients and chemical cycles of the ocean imply that variations in those variables owing to climate change and anthropogenic impact thus affect marine ecosystems, population, coastal communities and the related economy. Ocean warming is causing significant damage to marine ecosystems, and species are losing their habitats, forcing them to adapt or relocate to new temperatures or look for new feeding, spawning or nursery areas. Ocean acidity and the availability of sufficient oxygen both underpin the provision of marine ecosystem services to human society. Rapid changes in ocean acidity and falling oxygen levels caused by climate change and anthropogenic CO2 emissions are, however, now being observed, which is changing marine habitats and ecosystems worldwide. Warming is causing oxygen levels to fall, and acidification is rapidly changing the carbonate chemistry of surface ocean waters, which together are reducing the growth and survival of many organisms and degrading ecosystem resilience. Closing knowledge gaps in ocean science by supporting capacity-building efforts that increase the understanding of how the ocean and its ecosystems are responding to changes in ocean physical and chemical properties is an important pathway to reducing the impacts of such changes and achieving Sustainable Development Goal 14.", "Economic activity in the ocean is expanding rapidly, with projections that, by 2030, under a business-as-usual scenario, the ocean economy could more than double to a value of more than $3 trillion, with approximately 40 million full-time jobs (Organization for Economic Cooperation and Development, 2016). Technological advances and innovations will be critical to identifying sustainable pathways that allow for the development of global economies, including the ocean economy, while addressing many of the challenges facing the ocean at present. In the context of such rapid change, regulation and governance will struggle to keep up. The integration of emerging ocean industries into existing, fragmented regulatory frameworks will restrict the ability to address pressures generated by industries in an effective and timely way. More effective integrated ocean management will be required to ensure a sustainable future for the ocean in the light of the drivers of change detailed in the present chapter and also in chapter 27. If greenhouse gas emissions continue to be released at the current rate, it is estimated that the surface temperature will warm by 1.5°C sometime between 2030 and 2052 (IPCC, 2018). Many changes to marine ecosystems as a result of climate change have already been observed, and future climate-related change and associated risks will depend on whether (and when) net zero greenhouse gas emissions are achieved and the associated rate, peak and duration of surface warming (IPCC, 2018). Even if net zero global anthropogenic CO2 emissions are achieved, sustained warming will persist for centuries to millenniums and will continue to cause further long-term changes in the climate system and, by association, in the ocean, including sea level rise and ocean acidification (IPCC, 2018). The upscaling and acceleration of mitigating and adaptive approaches will be required to reduce future climate-related risks to food security, maritime industries and coastal communities associated with changes to the marine environment. The COVID-19 pandemic is currently sweeping across the world, causing major disruption to national economies and people. In many regions, because of mitigating efforts to reduce the spread of the virus, pressures immediately affecting the ocean, such as fishing, tourism activities, pollution and greenhouse gas emissions, have been temporarily reduced. With restrictions being placed on the movement of people and on business operations, along with the closing of borders, disruption to supply chains and declining markets have affected a number of marine industries, notably fisheries. The likely impacts that reduced pressures might have on longer-term change by drivers such as climate change, however, are expected to be minimal, and it is currently unclear what benefits might be afforded to marine ecosystems. Disruptions to global supply chains have highlighted the need in many countries to strengthen local supply chains and, in particular, to explore e-commerce options for supporting supply chains in general.", "Impacts of climate change and related changes in the atmosphere Ocean circulation The intensified study of the ocean as part of the study of climate change has led to a much clearer understanding of the mechanisms of ocean circulation and its annual and decadal variations. As a result of changes in the heating of different parts of the ocean, patterns of variation in heat distribution across the ocean (such as the El Niño-Southern Oscillation) are also changing. Those changes in patterns result in significant changes in weather patterns on land. Water masses are also moving differently in areas over continental shelves, with consequent effects on the distribution of species. There is evidence that the global circulation through the open ocean may also be changing, which might lead, over time, to reductions in the transfer of heat from the equatorial regions to the poles and into the ocean depths. Storms and other extreme weather events Increasing seawater temperatures provide more energy for storms that develop at sea. The scientific consensus is that this will lead to fewer but more intense tropical cyclones globally. Evidence exists that the observed expansion of the tropics since approximately 1979 is accompanied by a pronounced poleward migration of the latitude at which the maximum intensities of storms occur. This will certainly affect coastal areas that have not been exposed previously to the dangers caused by tropical cyclones. Ultraviolet radiation and the ozone layer The ultraviolet (UV) radiation emitted by the sun in the UV-B range (280-315 nanometres wavelength) has a wide range of potentially harmful effects, including the inhibition of primary production by phytoplankton and cyanobacteria, changes in the structure and function of plankton communities and alterations of the nitrogen cycle. The ozone layer in the Earth’s stratosphere blocks most UV-B from reaching the ocean’s surface. Consequently, stratospheric ozone depletion since the 1970s has been a concern. International action (under the Montreal Protocol on Substances that Deplete the Ozone Layer) to address that depletion has been taken, and the situation appears to have stabilized, although with some variation from year to year. Given those developments and the variations in the water depths to which UV-B penetrates, a consensus on the magnitude of the ozone-depletion effect on net primary production and nutrient cycling has yet to be reached. There is, however, a potential effect of ultraviolet on nanoparticles.", "Climate change Climate has always been a major influence on the marine environment, with high natural variability from year to year and longer-term variability associated with climate phenomena at the regional and global levels. However, there is strong evidence that the climate is changing at a rate unprecedented in the geological record. The Intergovernmental Panel on Climate Change, in its special report on the ocean and cryosphere in a changing climate (Intergovernmental Panel on Climate Change (IPCC), 2019), summarizes historic and recent patterns in the global climate and provides projections of changes under different greenhouse gas emissions scenarios. Greenhouse gas emissions have continued to rise over the period since the first Assessment, with global CO2 emissions increasing from 30.4 gigatons in 2010 to 33.3 gigatons in 2019. The growth in emissions has resulted in widespread reduction of the cryosphere (frozen-water parts of the planet), continued increases in ocean temperature, decreases in ocean pH and oxygen, shifts in currents and increases in extreme events such as heatwaves (IPCC, 2019). Those changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9. Following on from the United Nations Framework Convention on Climate Change (which entered into force in 1994) and the Kyoto Protocol (which entered into force in 2005), the Conference of the Parties to the Convention, at its twenty-first session, adopted the Paris Agreement in December 2015. The Agreement is aimed at strengthening the global response to the threat of climate change by holding the global average temperature well below 2°C above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5°C above pre-industrial levels. It is recognized in the Agreement that climate change represents an urgent and potentially irreversible threat to human societies and the planet and thus requires the widest possible cooperation of all countries. It is also recognized that deep reductions in global emissions will be required in order to achieve the ultimate objective of the Convention. In its report on global warming of 1.5°C (IPCC, 2018), the Intergovernmental Panel on Climate Change outlined the mitigation pathways compatible with a 1.5°C warming of the global climate, likely impacts associated with such warming and what would be needed in response to such a change. It highlighted that warming from anthropogenic emissions would persist for centuries to millenniums and would continue to cause further long-term changes in the climate system, including the ocean. Interactions between climate change and other drivers include influencing the distribution of global populations as people shift from increasingly uninhabitable areas, economic impacts, including those associated with food production (e.g., aquaculture and fisheries), and an ever greater need for technological innovations and solutions to reduce greenhouse gases, including further reliance on marine renewable energy.", "Imbalances in the freshwater cycle manifest themselves as changes in global sea level. Changes in global mean sea level are largely caused by a combination of changes in ocean heat content and exchanges of freshwater between the ocean and continents. When water is added to the ocean, global sea level adjusts, rapidly resulting in a relatively uniform spatial pattern for the seasonal ocean mass balance, as compared to the seasonal steric signal, which has very large regional amplitudes (Chambers, 2006). ‘Steric’ refers to density changes in seawater due to changes in heat content and salinity. On annual scales, the maximum exchange of freshwater from land to ocean occurs in the late Northern Hemisphere summer, and therefore the seasonal ocean mass signal is in phase with total sea level with an amplitude of about 7 mm (Chambers et al., 2004). Because most of the ocean is in the Southern Hemisphere, the seasonal maximum in the steric component occurs in the late Southern Hemisphere summer, when heat storage in the majority of the ocean peaks (Leuliette and Willis, 2011). Because globally averaged sea level variations due to heat content changes largely cancel out between the Northern and Southern Hemispheres, the size of the steric signal, globally averaged, is only 4 mm. Globally averaged sea level has risen at 3.2 mm/yr for the past two decades (Church et al., 2011), of which about a third comes from thermal expansion. The remainder is due to fluxes of freshwater from the continents, which have increased as the melting of continental glaciers and ice sheets responds to higher temperatures. Multi-decadal fluctuations in equatorial and mid-latitude winds (Merrifield et al., 2012; Moon et al., 2013) cause regional patterns in sea-level trends which are reflected in the El Niño/Southern Oscillation (ENSO) and the Pacific decadal oscillation (PDO) indices in the Pacific (Merrifield et al., 2012; Zhang and Church, 2012) and northern Australia (White et al., 2014). Interannual changes in global mean sea level relative to the observed trend are largely linked to exchanges of water with the continents due to changes in precipitation patterns associated largely with the ENSO; this includes a drop of 5 mm during 2010-11 and rapid rebound in 2012-13 (Boening et al., 2012; Fasullo et al., 2013)." ]

[ "The polar ice sheets of Greenland and Antarctica are the largest reservoirs of freshwater on the planet, holding 7 m and 58 m of the sea-level equivalent, respectively (Vaughan et al., 2013). The net growth or shrinkage of such an ice sheet is a balance between the net accumulation of snow at the surface, the loss from meltwater runoff, and the calving of icebergs and submarine melting at tidewater margins, collectively known as marine ice loss. There is some debate about the relative importance of these in the case of Greenland. Van den Broeke et al. (2009), show the volume transport to the ocean is almost evenly split between runoff of surface meltwater and marine ice loss. In a more recent work, Box and Colgan (2013) estimate marine ice loss at about twice the volume of meltwater (see Figure 5 in that article), with both marine ice loss and particularly runoff increasing rapidly since the late 1990s. According to the Arctic Monitoring and Assessment Programme (AMAP, 2011), the annual mass of freshwater being added at the surface of the Greenland Ice Sheet (the surface mass balance) has decreased since 1990. Model reconstructions suggest a 40% decrease from 350 Gt/y (1970 - 2000) to 200 Gt/y in 2007. Accelerating ice discharge from outlet glaciers since 1995 - 2002 is widespread and has gradually moved further northward along the west coast of Greenland with global warming. According to AMAP (2011), the ice discharge has increased from the pre-1990 value of 300 Gt/y to 400 Gt/y in 2005. Antarctica’s climate is much colder, hence surface meltwater contributions are negligible and mass loss is dominated by submarine melting and ice flow across the grounding line where this ice meets the ocean floor (Rignot and Thomas, 2002). Freshwater fluxes from ice sheets differ from continental river runoff in two important respects. First, large fractions of both Antarctic ice sheets are grounded well below sea level in deep fjords or continental shelf embayments; therefore freshwater is injected not at the surface of the ocean but at several hundred meters water depth. This deep injection of freshwater enhances ocean stratification which, in turn, plays a role in ecosystem structure. Second, unlike rivers, which act as a point source for freshwater entering the ocean, icebergs calved at the grounding line constitute a distributed source of freshwater as they drift and melt in adjacent ocean basins (Bigg et al., 1997; Enderlin and Hamilton, 2014). Sea ice is one of the smallest reservoirs of freshwater by volume, but it exhibits enormous seasonal variability in spatial extent as it waxes and wanes over the polar oceans. By acting as a rigid cap, sea ice modulates the fluxes of heat, moisture and momentum between the atmosphere and the ocean. Summertime melting of Arctic sea ice is an important source of freshwater flux into the North Atlantic, and episodes of enhanced sea ice export to warmer latitudes farther south give rise to rapid freshening episodes, such as the Great Salinity Anomaly of the late 1960s (Gelderloos et al., 2012). The spatial distributions of these freshwater fluxes drive important patterns in regional and global ocean circulation, which are discussed in Chapter 5." ]

[ "B2231" ]

[ "Impacts of climate change and related changes in the atmosphere Sea-level rise It is very likely that extreme sea-level maxima have already increased globally since the 1970s, mainly as a result of global mean sea-level rise. That rise is due in part to anthropogenic warming, causing ocean thermal expansion and the melting of glaciers and of the polar continental ice sheets. Globally averaged sea level has thus risen by 3.2 mm a year for the past two decades, of which about a third is derived from thermal expansion. Some of the remainder is due to fluxes of freshwater from the continents, which have increased as a result of the melting of continental glaciers and ice sheets. Finally, regional and local sea-level changes are also influenced by natural factors, such as regional variability in winds and ocean currents, vertical movements of the land, isostatic adjustment of the levels of land in response to changes in physical pressures on it and coastal erosion, combined with human perturbations by change in land use and coastal development. As a result, sea levels will rise more than the global mean in some regions, and will actually fall in others. A 4°C warming by 2100 (which is predicted in the high-end emissions scenario in the report of the Intergovernmental Panel on Climate Change) would lead, by the end of that period, to a median sea-level rise of nearly 1 metre above the 1980 to 1999 levels. Ocean acidification Rising concentrations of carbon dioxide in the atmosphere are resulting in increased uptake of that gas by the ocean. There is no doubt that the ocean is absorbing more and more of it: about 26 per cent of the increasing emissions of anthropogenic carbon dioxide is absorbed by the ocean, where it reacts with seawater to form carbonic acid. The resulting acidification of the ocean is occurring at different rates around the seas, but is generally decreasing the levels of calcium carbonate dissolved in seawater, thus lowering the availability of carbonate ions, which are needed for the formation by marine species of shells and skeletons. In some areas, this could affect species that are important for capture fisheries.", "Global surface ocean pH has declined on average by approximately 0.1 since the Industrial Revolution, an increase in acidity of about 30 per cent. Ocean pH is projected to decline by approximately an additional 0.3 over the next century unless global carbon emissions are significantly curtailed. The changes can be observed in extended ocean time series, and the rate of change is likely to be unparalleled in at least the past 66 million years. The time of emergence of the signal varies from 8 to 15 years for open ocean sites and 16 to 41 years for coastal sites, making it necessary to commit to long-term observational records, especially in the coastal zone, where most commercially and culturally important marine resources reside.Oceanic oxygen levels have declined in recent decades, with strong regional variations. While the overall oxygen content has decreased by about 2 per cent in five decades, oxygen in coastal areas or near oxygen minimum zones shows larger variations. Coastal changes are mostly fuelled by riverine run-off, and the open ocean changes are likely related to a combination of changes in ocean circulation and biogeochemical cycles. Temperature-driven solubility decrease is responsible for most near-surface oxygen loss, while other processes have to be accountable for deep-ocean oxygen loss. A further decrease in oxygen in and near oxygen minimum zones can lead to climate feedback through consequent greenhouse gas emissions.Sea ice covers 15 per cent of the global ocean and affects global heat balance and global thermohaline circulation. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. Arctic sea ice extent is declining by -2.7 ± 0.4 per cent c-1 during the winter, and -2.8 ± 2.3 per cent c-1 during the summer. In contrast, trends in total Antarctic sea ice extent are insignificant, 0.6 ± 0.6 per cent c-1 during the summer and 1.1 ± 3.7 per cent c-1 during the winter. Regionally, the spatial distribution of the trends is dramatic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. The spatial distribution of the changes in sea ice is attributed to changes in wind and ocean currents related to the Arctic Oscillation in the northern hemisphere and the Southern Annular Mode and El Niño in the southern hemisphere.", "Ocean warming and land ice melt are the main causes of present-day accelerating global mean sea level rise. The global mean sea level has been rising since 1993 (the altimetry era) at a mean rate of 3.1 ± 0.3 mm per year, with a clear superimposed acceleration of approximately 0.1 mm per year. Satellite altimetry has also revealed strong regional variability in the rates of sea level change, with regional rates up to two or three times greater than the global mean in some regions. Owing to global warming, many circulation systems also experience changes. Changes in sea level height, measured with high-precision satellite altimetry, hint at the widening and strengthening of the subtropical gyres in the North and South Pacific. The studies, furthermore, show a poleward movement of many ocean currents, including the Antarctic circumpolar current and the subtropical gyres in the southern hemisphere, as well as western boundary currents in all ocean basins. One of the major ocean current systems, the Atlantic meridional overturning circulation, has already weakened, and it is very likely that it will continue to do so in the future. Impacts that follow such changes include regional sea level rise, changes in nutrient distribution and carbon uptake and feedbacks with the atmosphere. The globally averaged ocean surface temperature data show a warming of 0.62±0.12?°C per century over the period 1900– 2018. In the recent decade (2009–2018), the rate of ocean surface warming is 2.56±0.68?°C c-1. The warming happens in most ocean regions with some areas, such as in the North Atlantic, showing long-term cooling. Since 1955, the upper 2,000 m of the ocean has also exhibited signs of robust warming, as evidenced by the increase in ocean heat content. The spatial patterns of multidecadal salinity changes provide convincing evidence of global-scale water cycle change in the global ocean coincident with warming over the period. The resolved changes are replicated in all observed analyses of long-term salinity changes, and more recently have been reproduced in forced climate model simulations. Those changes are manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and corresponding freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. Similar changes are also seen in the ocean subsurface, with similar patterns of freshening low-salinity waters and enhanced high-salinity waters represented in each of the ocean basins, Atlantic, Pacific and Indian, and across the Southern Ocean.", "Thermal expansion from a warming ocean and land ice melt are the main causes of the accelerating global rise in the mean sea level. Global warming is also affecting many circulation systems. The Atlantic meridional overturning circulation has already weakened and will most likely continue to do so in the future. The impacts of ocean circulation changes include a regional rise in sea levels, changes in the nutrient distribution and carbon uptake of the ocean and feedbacks with the atmosphere, such as altering the distribution of precipitation. More than 90 per cent of the heat from global warming is stored in the global ocean. Oceans have exhibited robust warming since the 1950s from the surface to a depth of 2,000 m. The proportion of ocean heat content has more than doubled since the 1990s compared with long-term trends. Ocean warming can be seen in most of the global ocean, with a few regions exhibiting long-term cooling. The ocean shows a marked pattern of salinity changes in multidecadal observations, with surface and subsurface patterns providing clear evidence of a water cycle amplification over the ocean. That is manifested in enhanced salinities in the near-surface, high-salinity subtropical regions and freshening in the low-salinity regions such as the West Pacific Warm Pool and the poles. An increase in atmospheric CO2 levels, and a subsequent increase in carbon in the oceans, has changed the chemistry of the oceans to include changes to pH and aragonite saturation. A more carbon-enriched marine environment, especially when coupled with other environmental stressors, has been demonstrated through field studies and experiments to have negative impacts on a wide range of organisms, in particular those that form calcium carbonate shells, and alter biodiversity and ecosystem structure. Decades of oxygen observations allow for robust trend analyses. Long-term measurements have shown decreases in dissolved oxygen concentrations for most ocean regions and the expansion of oxygen-depleted zones. A temperature-driven solubility decrease is responsible for most near-surface oxygen loss, though oxygen decrease is not limited to the upper ocean and is present throughout the water column in many areas. Total sea ice extent has been declining rapidly in the Arctic, but trends are insignificant in the Antarctic. In the Arctic, the summer trends are most striking in the Pacific sector of the Arctic Ocean, while, in the Antarctic, the summer trends show increases in the Weddell Sea and decreases in the West Antarctic sector of the Southern Ocean. Variations in sea ice extent result from changes in wind and ocean currents.", "Impacts of climate change and related changes in the atmosphere Loss of sea ice in high latitudes and associated ecosystems The high-latitude ice-covered ecosystems host globally significant arrays of biodiversity, and the size and nature of those ecosystems make them critically important to the biological, chemical and physical balance of the biosphere. Biodiversity in those systems has developed remarkable adaptations to survive both extreme cold and highly variable climatic conditions. High-latitude seas are relatively low in biological productivity, and ice algal communities, unique to those latitudes, play a particularly important role in system dynamics. Ice algae are estimated to contribute more than 50 per cent of the primary production in the permanently ice-covered central Arctic. As sea-ice cover declines, this productivity may decline and open water species may increase. The high-latitude ecosystems are undergoing change at a rate more rapid than in other places on earth. In the past 100 years, average Arctic temperatures have increased at almost twice the average global rate. Reduced sea ice, especially a shift towards less multi-year sea ice, will affect a wide range of species in those waters. For example, owing to low reproductive rates and long lifetimes, some iconic species (including the polar bear) will be challenged to adapt to the current fast warming of the Arctic and may be extirpated from portions of their range within the next 100 years.", "Climate change Climate has always been a major influence on the marine environment, with high natural variability from year to year and longer-term variability associated with climate phenomena at the regional and global levels. However, there is strong evidence that the climate is changing at a rate unprecedented in the geological record. The Intergovernmental Panel on Climate Change, in its special report on the ocean and cryosphere in a changing climate (Intergovernmental Panel on Climate Change (IPCC), 2019), summarizes historic and recent patterns in the global climate and provides projections of changes under different greenhouse gas emissions scenarios. Greenhouse gas emissions have continued to rise over the period since the first Assessment, with global CO2 emissions increasing from 30.4 gigatons in 2010 to 33.3 gigatons in 2019. The growth in emissions has resulted in widespread reduction of the cryosphere (frozen-water parts of the planet), continued increases in ocean temperature, decreases in ocean pH and oxygen, shifts in currents and increases in extreme events such as heatwaves (IPCC, 2019). Those changes are described in detail in chapter 5, and the pressures that they are generating, including socioeconomic impacts, are described in detail in chapter 9. Following on from the United Nations Framework Convention on Climate Change (which entered into force in 1994) and the Kyoto Protocol (which entered into force in 2005), the Conference of the Parties to the Convention, at its twenty-first session, adopted the Paris Agreement in December 2015. The Agreement is aimed at strengthening the global response to the threat of climate change by holding the global average temperature well below 2°C above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5°C above pre-industrial levels. It is recognized in the Agreement that climate change represents an urgent and potentially irreversible threat to human societies and the planet and thus requires the widest possible cooperation of all countries. It is also recognized that deep reductions in global emissions will be required in order to achieve the ultimate objective of the Convention. In its report on global warming of 1.5°C (IPCC, 2018), the Intergovernmental Panel on Climate Change outlined the mitigation pathways compatible with a 1.5°C warming of the global climate, likely impacts associated with such warming and what would be needed in response to such a change. It highlighted that warming from anthropogenic emissions would persist for centuries to millenniums and would continue to cause further long-term changes in the climate system, including the ocean. Interactions between climate change and other drivers include influencing the distribution of global populations as people shift from increasingly uninhabitable areas, economic impacts, including those associated with food production (e.g., aquaculture and fisheries), and an ever greater need for technological innovations and solutions to reduce greenhouse gases, including further reliance on marine renewable energy.", "Passenger traffic Passenger traffic is almost entirely carried on local ferries or on cruise ships. The pattern of ferry traffic remains as described in the first Assessment, but the level of traffic has grown steadily (International Shipping Economics and Logistics (ISL), 2017). The activities of cruise ships have also continued to grow steadily with the increased global market for cruising: the number of passengers is increasing at an average of about 5 per cent per year (figure III). The size of individual cruise ships is also growing steadily (figure IV). The overall market remains dominated by passengers from the United States (about 50 per cent of the total market) and the global distribution of cruising remains largely as described in the first Assessment, with the major focuses being the Caribbean and the Mediterranean, which together accounted for a little over half of all traffic in 2017 (Cruise Lines International Association (CLIA), 2018). The first Assessment noted the relatively recent, but rapid, growth of tourism to Antarctica, in particular with regard to cruise ships – from 27,324 cruise ship passengers in the 2003– 2004 season to 37,044 in the 2013–2014 season, which is an increase of 35 per cent. The growth has continued, reaching 51,700 in the 2017–2018 season (an increase of a further 40 per cent), with a forecast of further growth to 55,750 in the 2018–2019 season. Over 80 per cent of the tourists land on Antarctica (International Association of Antarctic Tour Operators (IAATO), 2018). Passenger landings and marine traffic are highly concentrated at a few specific locations, in particular along the Antarctic Peninsula’s south-western coast. Growth in Antarctic tourism is closely correlated with the economies of the countries sending the most visitors to the region: 60 per cent of the tourists come from the United States (33 per cent), China (16 per cent) and Australia (11 per cent). The proportion of tourists from China increased significantly between 2013 and 2014 and between 2017 and 2018. Markets for Antarctic travel are probably far from saturated, and demand is therefore likely to continue to grow (Bender and others, 2016). Apart from some categories, such as private yachts, that shipping traffic is covered by the new mandatory Polar Code (International Maritime Organization (IMO), 2015). Tourism is also increasing rapidly in the Arctic: summer tourism quadrupled and winter tourism increased by over 600 per cent between 2006 and 2016, although large areas remain unaffected. The increase is likely to have an impact on Arctic ecosystems and communities, especially as new parts of the Arctic open up with less sea ice, new airports and continued promotion of the area (Runge and others, 2020). In 2020, passenger traffic on ferries dropped significantly early in the year as a result of the COVID-19 pandemic, but, by August 2020, it was beginning to recover (e.g., EMSA, 2020). Cruise ship activity has plummeted for the same reason: in August 2019, there were 1.8 million persons on board cruise ships; in August 2020, there were only a small number of crew (EMSA, 2020).", "Impacts of climate change and related changes in the atmosphere Sea-surface temperature The Intergovernmental Panel on Climate Change has reaffirmed in its fifth report its conclusion that global sea-surface temperatures have increased since the late nineteenth century. Upper-ocean temperature (and hence its heat content) varies over multiple time scales, including seasonal, inter-annual (for example, those associated with the El Niño-Southern Oscillation), decadal and centennial periods. Depth-averaged ocean-temperature trends from 1971 to 2010 are positive (that is, they show warming) over most of the globe. The warming is more prominent in the northern hemisphere, especially in the North Atlantic. Zonally averaged upper-ocean temperature trends show warming at nearly all latitudes and depths. However, the greater volume of the ocean in the southern hemisphere increases the contribution of its warming to the global heat content. The ocean’s large mass and high heat capacity enable it to store huge amounts of energy, more than 1,000 times than that found in the atmosphere for an equivalent increase in temperature. The earth is absorbing more heat than it is emitting back into space, and nearly all that excess heat is entering the ocean and being stored there. The ocean has absorbed about 93 per cent of the combined extra heat stored by warmed air, sea, land, and melted ice between 1971 and 2010. During the past three decades, approximately 70 per cent of the world’s coastline has experienced significant increases in sea-surface temperature. This has been accompanied by an increase in the yearly number of extremely hot days along 38 per cent of the world’s coastline. Warming has also been occurring at a significantly earlier date in the year along approximately 36 per cent of the world’s temperate coastal areas (between 30° and 60° latitude in both hemispheres). That warming is resulting in an increasingly poleward distribution of many marine species.", "Economic activity Economic growth, measured as gross domestic product (GDP) per capita, has steadily increased globally, although it has slowed as a result of declining trade volume. Growth in the first half of 2019 stood at 1 per cent, the weakest level since 2012 (IMF, 2019). Economic growth, when averaged across the global population (with vast geographical variability in economic growth, as noted in sect. 3), has resulted in the average annual income of an individual increasing from $3,300 in 1950 to $14,574 in 2016. The slowdown in growth is largely associated with weak manufacturing and trade. In contrast, service industries such as tourism have grown (IMF, 2019). As the global population has grown and the demand for goods and services has increased, there has been an associated increase in energy consumption and resource use. Understanding the relationship between increasing economic activity and the use of natural resources is essential to identifying future sustainability and limiting impacts associated with extraction, production, consumption and waste generation (Jackson, 2017). Total energy demand, as measured in million tons of oil equivalent (Mtoe), grew from 13,267 Mtoe in 2014 to 13,978 Mtoe in 2018. At the same time, primary energy intensity, an indicator of how much energy is used by the global economy, slowed from 1.7 per cent in 2017 to 1.2 per cent in 2019 (IEA, 2019a). The slowing of efficiencies (i.e., the amount of GDP generated for the amount of energy used) is the result of a number of short-term factors, such as growth in fossil fuel-based electricity generation, and longer-term structural changes, such as a slowing transition towards less energy-intensive industries. At the same time, investment targeting energy efficiencies has been stable since 2014. Improvements in technical efficiency reduced energy-related carbon emissions by 3.5 gigatons of CO2 between 2015 and 2018 (IEA, 2019a). In addition, renewable energy production has grown as many countries shift to energy strategies that rely on it as part of efforts to reduce greenhouse gas emissions. Ocean energy production is part of many strategic developments and grew from 1 TWh (Terawatt hour) in 2014 to 1.2 TWh in 2018 (IEA, 2019b). Changes in energy production, including marine renewable energy and the pressures generated on the marine environment, are detailed in chapters 19 and 21. Economic activity associated with the extraction of marine resources also continues to grow as the global population expands. Marine and freshwater food production was a key protein provider and source of income for approximately 59.6 million people globally in 2016, an increase from 56.6 million in 2014. Although marine capture fisheries remain stable at around 80 million tons, mariculture is steadily increasing, from 26.8 million tons in 2014 to 28.7 million tons in 2016 (Food and Agriculture Organization of the United Nations, 2018). The implications for increasing marine food production demands, including overfishing, bycatch of endangered species and habitat loss or degradation by fishing and aquaculture, are described in detail in chapters 15–17. Many countries are developing or have developed strategies for the potential growth of maritime activities, such as ocean energy, aquaculture, marine biotechnology, coastal tourism and seabed mining (i.e., growth of the blue economy). However, an important constraint on the growth of ocean economies is the current declining health of the ocean and the pressures already being placed on it (Organization for Economic Cooperation and Development, 2016), many of which are detailed in Part 5.", "Global aquaculture production in 2017 (animals and plants) was recorded as 111.9 million tons, with an estimated firstsale value of $249.6 billion. Since 2000, world aquaculture has ceased to enjoy the high annual growth rates of the 1980s and 1990s (11.3 and 10.0 per cent, respectively). Nevertheless, it continues to grow at a faster rate than other major food production sectors. Annual growth declined to a moderate 5.8 per cent during the period from 2000 to 2016, although double-digit growth still occurred in a small number of countries, in particular in Africa, from 2006 to 2010. Fish produced by this rapidly growing sector is high in protein and contains essential micronutrients, sometimes essential fatty acids, which cannot easily be substituted by other food commodities. The United Nations predicts that the global population will reach 8.5 billion in 2030. This will inevitably increase the pressure on food sectors to increase production and reduce losses and waste. Production increases must be able to ensure sustainability, given a context in which key resources, such as land and water, are likely to be scarcer and the impact of climatic change will intensify. The aquaculture sector is no exception. Success in achieving the long-term goal of economic, social and environmental sustainability of the aquaculture sector, so as to ensure its continued contribution of nutritious food to keep the world healthy, will depend primarily on continued commitments by Governments to provide and support a good governance framework for the sector. As the sector further expands, intensifies and diversifies, it should recognize relevant environmental and social concerns and make conscious efforts to address them in a transparent manner, backed by scientific advice." ]

[ "Many estuaries present natural harbor conditions with relatively calm and shallow waters that provide a connection between the ocean and continental waterways. The increase in the demand for goods by the constant growing of the world population has forced estuaries to be altered by human activities, such as dredging, in order to maintain a safe navigation system. The development of sophisticated morphological and hydrodynamic models opened a new perspective of assisting dredging operations inside different estuaries. Thus, the aim of this study is to apply a hydromorphodynamic model to simulate the bed evolution of the Patos Lagoon estuary, southern Brazil. The results of the simulation were applied in a dredge operation model to simulate dredging inside the waterway of the Rio Grande harbor, located inside the Patos Lagoon estuary. The salinity and current velocities inside the estuary were well represented by the model simulations. An annual mean discharge of 3 407 ms3 s?1 was calculated for the lagoon for the year 2004. The morphodynamic model successfully represented the silted and eroded scenarios for the estuarine channel. The dredge operation model results affirm that dredging of the channel causes significant variations in estuarine physical parameters such as salinity, current velocity and suspended sediment concentration. The bed evolution results indicate that a fast siltation of the channel occurs right after dredging stops, stabilizing the variations after a 60-day period." ]

[ "A1486" ]

[ "This study describes the spatial and temporal patterns of changes in the macrobenthic communities of Guajará Bay, an estuary in northern Brazil. Samples were collected at seven sites in the dry (December 2004 and September 2005) and rainy seasons (March and June 2005). On each occasion, four biological samples and one sediment sample were collected at each site using a Petersen grab (0.039 m2). Simultaneously, the pH of the surface water, salinity, electrical conductivity and temperature were measured. Water parameters, except temperature, showed strong seasonal variation. As a general rule, pH, salinity and electrical conductivity were higher in the dry season and increased toward the mouth of the estuary. Sediment characteristics varied little in space or time. Almost 99% of all the specimens collected were annelids. The abundance and diversity of the organisms were significantly higher in the rainy season, when there was a marked increase in the abundance of oligochaetes and insect larvae, whereas polychaetes predominated during the dry season. The results of the ANOSIM indicated significant differences in the composition of the macrofaunal communities between seasons. The groups formed by the CCA reflected the distance from the mouth of the estuary. At the innermost sites, characterized by lower electrical conductivity and rich, organic sandy sediments, oligochaetes predominated, whereas at the sites further downstream, where more saline conditions predominate, polychaetes were found in higher densities. The results indicated that the structure of the macrobenthic communities in this estuarine bay are structured primarily by salinity, and secondarily by seasonal changes in rainfall rates, which affect the characteristics of both the water and sediments.", "Study Region: Porous aquifer system of Northeastern Guanabara Bay, Rio de Janeiro, Brazil. Study Focus: The present work aimed to comprehend the geochemical processes responsible for the considerable range of salinity (48 to 5651 ?S. cm?1) through chemical composition of groundwater (hydrogeochemical modeling through PHREEQC) allied to chemical ratios (Cl/Br ratio) and stable isotopes data (?18O and ?2H). New hydrological insights for the region: The PHREEQC modeling showed that high pH and low pe values conditioning the main processes controlling the hydrogeochemical evolution of groundwater in that region. The salinity origins should be explained by 4 hypotheses: 1) a group related to recharge zones, close to the basin headboard or connected to the fractured aquifers from the basement rocks (low Cl/Br ratio and predominance of light ?18O and ?2H isotopes; 2) a group formed by groundwater with high Cl/Br ratio and predominance of heavy ?18O and ?2H isotopes, associated to dissolution processes of Tertiary brackish water environment sediments; 3) a group formed by groundwater with low Cl/Br ratio, high Cl? concentrations and low ?18O and ?2H, related to groundwater under influence of Caceribu River (high content of domestic effluents); and 4) a group composed by groundwater with high salinity, high Cl? concentrations and enrichment of ?18O and ?2H, located at a mangrove area, where the influence of seawater intrusion in the aquifer is recognized.", "Estuarine systems are very sensitive environments to sea level rise as a consequence of climate changes, which can enhance seawater intrusion and affect multiple water uses. The seawater intrusion under sea level scenarios in an estuarine river by applying the one-dimensional hydrodynamic and water quality model HEC-RAS 5.0.5 was studied. The study was carried out at the estuarine reach of Cubatão River, in São Paulo, Brazil. Considering sea level rise scenarios of ?H = 0.25 m, 0.50 m, and 1.0 m combined with constant freshwater discharge conditions for Cubatão River (16 m3/s, mean annual discharge and 8 m3/s, dry season discharge), the model results showed that seawater intrusion moves significantly upstream the river in all cases and the maximum seawater intrusion length may reach 10 km in the worst scenario (?H = 1.0 m and 8 m3/s freshwater discharge), 70% higher than the current sea level and the mean discharge. At the local water abstraction point for urban supply, salinity concentration may reach 12 g/kg, making conventional water treatment unfeasible. Sea level rise may threaten water supply facilities and require water resource management solutions, such as water abstraction restricted times when salinity concentration is low; higher freshwater reservation; new water abstraction locations, farther the present ones; or higher water discharges in Cubatão River from a local hydroelectric power plant, which can cause water resource management conflicts.", "This paper presents an Artificial Neural Network (ANN) model developed to predict extreme sea level variation in Santos basin on the Southeast region of Brazil, related to the passage of frontal systems associated with cyclones. A methodology was developed and applied to Petrobras water deep data set. Hourly time series of water level were used in a deep point of 415 meters. 6-hourly series of atmospheric pressure and wind components from NCEP/NCAR reanalysis data set were also used from ten points over the oceanic area. Correlations and spectral analyse were verified to define the time lag between the meteorological variables and the coastal sea level response to the occurrences of the extreme atmospheric systems. These correlations and time lags were used as input variables of the ANN model. This model was compared with multiple linear regression (MLR) and presented the best performance, generalizing the effect of the atmospheric interactions on extreme sea level variations.", "We describe the design, implementation, and performance of a fully automated Santos Operational Forecasting System (SOFS), built to monitor and predict short-term (< 3 days) sea surface elevations, currents, temperature, and salinity in the Santos-Sao Vicente-Bertioga Estuarine System (SSVBES). The SSVBES located at 24.0?S, 46.3?W is a complex estuarine system with many interconnected channels and two connections with the open sea. The system is prone to storm tides that bring coastal flooding to and interrupt ship traffic through Santos Port. The SOFS hydrodynamic module is based on the Princeton Ocean Model (POM) version POM-rain. The SSVBES model grid is forced by tides, winds, and river runoff and is nested into a coarse-resolution South Brazil Bight (SBB) grid. The SBB grid is forced by winds, density gradients, and the Brazil Current flowing offshore. Within SSVBES, SOFS works in parallel with three real-time observation stations. The model performance was tested against observed data with a best Willmott skill of 0.97 and root mean square error (RMSE) of 13.0 cm for tidal sea level (15.9% of the mean tidal range). For tidal currents, the best skill and RMSE were above 0.99 and 3.9 cm/s (4.3% of the mean tidal current range), respectively. The coupled system was able to simulate seven storm tides with average skill of 0.95 and average RMSE of 17.0 cm. The good agreement with observed data shows the potential use of the designed system to protect both human life and assets.", "Estuaries provide an appropriate unit for spatial analyses that permit the establishment of environmental management strategies, based on the existing knowledge of their hydrographic basins. The present study developed a diagnostic approach to landscape and environmental management, based on the theoretical concepts of landscape geoecology and environmental planning, and supported by the techniques of remote sensing and thematic cartography. Thematic maps were prepared representing the structures, functions, and dynamics of the natural and cultural geoecological units formed by the estuaries of three Brazilian rivers - the Itapecuru - State of Maranhão and estuarine complex of the Tubarão river - State of Rio Grande do Norte. These maps show the geoecological units and features, indicating their degree of ecodynamic stability, and the evolutionary trends of the propositional scenarios and zoning, with the objective of defining potential strategies for the planning of land use on different functional scales. Theoretical-methodological models of environmental management were proposed, based on landscape geoecology (geosystem analysis, ecodynamics) and environmental planning (thematic cartography, remote sensing) approaches. These models resulted in summary tables and thematic maps on three scales: (i) regional - hydrographic basin (1:250,000) and (ii) municipal - estuarine (1:100,000), to support the implementation of effective management plans for the study estuaries. This study was coordinated by the Landscape Geoecology and Environmental Planning Laboratory of the Federal University of Ceará, through the CNPq researcher PQ program, State University of Rio Grande do Norte and Federal University of Maranhão. It was also supported by four other Brazilian universities through their graduate and undergraduate research programs. This study represents an important step toward the development and integration of propositional management models based on interdisciplinary and interinstitutional approaches, which provide an ideal approach to the understanding and planning of the estuaries of the northern coast of Brazil, which encompasses two distinct socio-environmental realities, in the humid Amazon region and the semi-arid Northeast.", "The paper details a modeling project to understand the uplift associated with a multicomponent towed streamer acquisition and processing workflow in the Espirito Santo basin offshore Brazil. A complex model was built representing many of the common geological features in the Espirito Santo basin including allochthonous salt bodies, post-salt anticlinal generated fractures, volcanic intrusions, and shallow meandering channels. Synthetic seismic data was generated for a number of geometries, both single and multicomponent, including a very densely sampled control measurement. The synthetic measurements were reconstructed/interpolated to a 12.5-m crossline surface receiver sampling interval. The various datasets were compared both pre- and post-migration. The results suggest that the multicomponent measurement in conjunction with multicomponent reconstruction better samples the complex waveforms.", "This study focuses on modeling water quality in mangroves areas including the effects of wetting and drying processes on the biogeochemistry of the mangrove. To achieve it, we use a shallow water hydrodynamics model capable ofpredicting both water quality and wetting and drying, which uses a rough-porous layer approach based on the water level. To evaluate the capabilities of the model, we consider an estuary region in Brazil to evaluate the model’s capabilities. The simulations carried out show the hydrodynamic behaviors and effects related to the water quality parameters in a complex tidal system comprised of extensive mangrove flats.", "Changes in the regional hydrodynamics of the region of the South Atlantic near the east coast of Brazil were evaluated from the beginning to the end of the century. The analysis was based on the anomalies from two downscaling experiments using the HadGEM2-ES outputs for the historical and RCP4.5 runs from the Coupled Model Inter-comparison Project phase 5. The anomalies between the experiments were collected in a system of two nested grids, with 1 / 3 ° and 1 / 12 ° horizontal resolutions. A northward displacement of the Brazil Current (BC), a southward BC transport intensification, and a 1.44 °C increase of the mean values of sea surface temperatures were observed. The sea level rise (SLR) was projected up until 2100 across the study area, and the spatial variations were shown to have an average on SLR rate of 7.30 mm year- 1 for those regions close to the coast. These results highlight the importance of studying climate change and applying methods to enable the evaluation of its effects on coastal zones, especially for regions with few existing studies, such as the Brazilian continental shelf area.", "Turbulent air-sea heat fluxes were computed from in situ high-frequency micrometeorological data during two research cruises performed in the Southwestern Atlantic Ocean (SWAO) occurring in June 2012 and October 2014. Two different and dynamical areas were covered by the cruises: the Brazil-Malvinas Confluence (BMC) and the Southern Brazilian Continental Shelf (SBCS). The Eddy Covariance (EC) method was used to estimate the air-sea sensible and latent heat fluxes. This paper compares these novel high frequency estimates of heat fluxes with bulk parameterizations made at the same location and time from independent measurements taken onboard the ships. When comparing the EC and bulk-estimated time series of sensible heat fluxes, we found a good agreement both in their magnitude and variability, with small bias (generally < 20 W m-2) between the datasets from the two study areas in the SWAO. However, the EC and bulk latent heat flux comparisons show large biases ranging from 75 W m-2 to 100 W m-2 in the SBCS and BMC, respectively. These biases were always associated with short term, high frequency environmental perturbations occurring either in the atmosphere or in the ocean with the majority related to strong wind burst events and large air-sea temperature gradients. The short period changes in atmospheric conditions were mostly related to the passage of transient synoptic systems over the two study areas. The large air-sea temperature gradients were mostly linked to the surface characteristics of the BMC and SBCS regions, where sharp oceanographic fronts are located. Our results are able to contribute to improving weather and climate simulations of the mid to high latitudes of South America, a region largely influenced by the sea surface temperature patterns of the SWAO in combination with the frequent propagation of transient atmospheric systems." ]

[ "This paper focuses on solutions and strategies for conserving weight and space, reducing emissions, and leveraging data to optimize the performance of rotating equipment on floating, production, storage, and offloading (FPSO) vessels. It discusses design considerations for gas turbines in offshore applications (i.e., dry-low emissions technology, use of lightweight components, etc.) The paper also outlines a holistic digital lifecycle approach to FPSO topsides, which can help reduce capital and operating expenses, shorten project development cycles, and decrease offshore manpower requirements. For illustrative purposes, the paper discusses specific power and compression solutions that were implemented on various offshore projects in 2017 - 2018, ranging from Offshore Brazil to the Bering Sea. It outlines how the equipment configurations helped operators meet horsepower requirements and emissions targets, as well as CAPEX and OPEX objectives. Additionally, the paper discusses how digital transformation can be leveraged to optimize FPSO lifecycle performance, delivering benefits such as 4-12 week reduction in project cycle times, ~$7 million reduction in CAPEX, and $60 - $100 million reduction in OPEX over a 10-year period." ]

[ "A1673" ]

[ "During basic design development for new FPSO projects in Brazilian pre-salt exploration, digital technologies were employed, in order to achieve constructability design requirements, construction and commissioning specification checks. Due to its benefit cost, schedule, quality, and overall project objectives and deep influence in platform safety and operability, in a process explained in Figure 1. Those digital technologies, such as the use of databases, computer aided engineering (CAE), analysis tools, 3D simulations and consistency check, were identified in constructability reviews and were developed to achieve the best constructability procedures and solve construction inconsistencies between several involved disciplines in posterior detailed design, procurement and commissioning phases. This manuscript aims to present the use of digital technologies to support constructability analysis in offshore oil & gas production facility - surface installations - projects of Petrobras.", "This paper describes the history, challenges, solutions and evolution of the Floating Production Units in Brazil. The first floating unit was on stream in 1977 at Campos Basin in Brazil. It produced from a single well with a drilling riser and dry-X-tmas tree to a MODU converted into a floating production unit and exporting to a spread-moored shuttle-tanker by a floating hose. Now, more than 40 years later, over 2,400 meters of water depth at Santos Basin are moored several floating production and storage units (FPSOs). It houses over 40 thousand metric tons of complex topsides exploiting ultra-deep wells from the pre-salt prospects. Along the evolution of the FPSOs, one major stepping-stone was the implementation of lessons learned as a feedback to create a strong foundation. This paper will depict field demands and solutions adopted to deal with the differing climates and environments as well as other particularities to develop FPSOs in Brazil. To face the technological challenges to efficiently and safely produce from ultra-deep water complex pre-salt reservoirs required the consolidated use of the expertise and experience from past projects. Initially Petrobras was well known worldwide as a Semi-Submersible company, with a unique proficiency to develop converted Semi-submersibles and other new constructions. This expertise is still present to this day, but the company has since pioneered and consolidated the use of FPSOs worldwide, leading the industry in this concept. Petrobras led the industry effort to approve FPSO international standards, local regulations with agencies and regulatory bodies by the end of '80s to early '90s. This paper will focus on the evolution of this industry, highlighting the achievements, and address the new developments and opportunities for the future.", "Technological changes in drilling and production, including emerging technologies Offshore drilling and production continue to benefit from significant technological advances. Sophisticated techniques now make it possible to drill multiple wells from a single drilling platform, while advances in real-time fibre-optic monitoring of the well bore is optimizing the reservoir performance and mitigating equipment failure risks (Beaubouef, 2019). Similarly, the use of predictive analytics and artificial intelligence tools is enhancing data analysis for detecting equipment breakdown and improving operational efficiency (Husseini, 2018). The use of FPSO vessels enables drilling in areas further offshore and without ready access to a pipeline network to transport oil and gas onshore. It has also opened previously inaccessible hostile environments, in particular in the higher latitudes and in the Arctic, to exploration and development. FPSO vessels are equipped to store hydrocarbons onboard and periodically transfer their load to tankers for transportation onshore. They can also disconnect from their moorings in case of adverse weather conditions, such as cyclones and hurricanes. Once the reservoirs are depleted, an FPSO vessel can be redeployed to a new prospective site. The global market for FPSO vessels is currently boosted by large investments in deepwater exploration and development in such areas as the coast of Brazil (Rystad Energy, 2019). Meanwhile, FPSO vessel design is evolving to enhance safety, minimize complexity and reduce fabrication and operation costs (Barton, 2018). Such technological advances have enabled exploration and production at uncharted depths and distance from shore. As of March 2019, the record for an ultradeep water exploration well was in depths of 3,400 m, off the coast of Uruguay, while the record for an operational production platform stood at 2,896 m, in the Gulf of Mexico (Barton and others, 2019).", "In order to develop new deep water fields using FPSO's, Petrobras has introduced several innovations to install 34 flexible risers individually connected to the Barracuda FPSO project. This paper provides an overview of design of the pull in and pull out operations. It also deals with I tube dimensions considering studies of interference during the risers transference from the chain table up to the risers connection deck. Additionally, new concepts have been proposed to solve the problem of Chain Table Interface to the pull in of flexible risers to floating production systems. The following advantages of this system which have been considered: Standardization of I tube inner diameters; Standardization of Bell mouth dimensions; Standardization of riser hang off systems; Standardization of flexible riser end fittings; Development of new philosophy of pull in and pull out operations; Considerable reduction in time of diver operations; Considerable reduction in time to change pull in main sheaves.", "This paper describes the site installation of a turret moored Floating Production, Storage and Offloading System - FPSO - in 780 meters of water in Campos Basin, offshore Brazil. The FPSO, a 270,000 dwt converted tanker, is the first of a series of two ordered by Petrobras for development of the Marlim Field. An internal bow mounted Turret system, anchored to the seafloor by 8 chain-wire rope-chain combined mooring legs, is used to permanently moor the FPSO in the location while allowing the vessel to freely weathervane. Thirty-five flexible risers, laid in a free-hanging catenary configuration, provide the flow path between the FPSO and the various subsea equipment on the seafloor. This paper describes the installation equipment and procedures employed.", "Oil production in ultra-deep waters places some new challenges for floating units. As an FPSO is one of most common types of production units adopted by Petrobras, its behavior in extreme conditions has to be fully tested and verified. During extreme sea storms, ship type floating structures may be subjected to water on deck events (green water). In order to allow a detailed structural analysis, Computational Fluid Dynamics (CFD) techniques may be used to investigate detailed loads due to water on deck propagation, especially in beam sea conditions, which are not traditionally covered by maritime rules. Based on model test results, water ingress and water on deck propagation are simulated through CFD analysis. The methodology adopted consists of two different approaches: (i) The influence of a riser balcony lateral extent is analyzed based on a 2D wave propagation model and; (ii) the complex flow behavior through topside equipment is discussed by using a 3D simulation of a restricted deck area, including some strategies for impact protection. The results of the simulations allow investigation of the complex flow behavior depending on the riser balcony extent and topside configuration, as well as the resulting loads on critical structures. For a side hull balcony, its protective effect against wave run-up in beam waves is only effective with a lateral extent of 8m. By performing water on deck simulations, the benefits of \"V\" type protections are quantified leading to 20% loading reduction when compared to flat plates. The simulations reveal CFD as a very powerful tool to assess detailed transient pressure distributions for optimized structural design.", "This paper shows work performed through a Joint Industry Project (JIP), aimed to enable repairs made from composite materials to be applied to metallic structural components of offshore platforms in general and FPSOs in particular. The basic motivation was to provide a repair methodology that would cause a reduced impact to platform operations, particularly in classified areas. The focus on FPSOs derived from the fact that most of them are converted tankers, originally designed for overhauling in suitable docks from time to time. That is no longer possible once they are deployed as floating platforms, intended to stay in place for twenty years or more. An important prerequisite was that the repair procedure had necessarily to have the approval of the Classification Society of the platform. The project was conducted in three phases. The objective of the first phase was to develop a qualification procedure for the repair of relevant defects with adhesive patches and to demonstrate its feasibility with simple examples. Along phase two a Project Recommended Practice for Patch Repair was issued and more qualification tests were performed. Phase three consisted of a practical application of the Recommended Practice, accomplished within Petrobras by a repair at a ballast tank of the production semisubmersible platform P-20, in operation at Campos basin. The repair was accomplished by means of carbon fiber reinforcements within a vinylester matrix. This paper describes the P-20 repair case and the design of the bonded repair. A brief overview is presented of the installation of the repair, quality assurance issues and needs for future follow-up. The experimental and theoretical studies performed in support of the repair trial are briefly described. The successful repair trial demonstrates the utility of bonded repairs in managing the integrity of offshore steel structure assets.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive ? 630,000 bpd of oil and store 2.2 million bbl of oil.", "Petrobras signed letters of intent with Modec Inc to supply a floating production, storage, and offloading platform (FPSO) and a floating storage, and offloading (FSO) vessel in the offshore Campos basin. Modec will operate the FPSO in Espadarte Sul field and the FSO will receive stabilized crude oil from Marlin Sul, Roncador, and Marlin Leste fields. Both vessels are expected to be in place by yearend 2006. The FPSO will be able to process 100,000 bpd of oil, compress 87 million cu ft/day of gas, inject 113,000 bpd of water, and store 1.6 million bbl of oil. Modec will lease and operate the FPSO for 8 yr with an additional four 1-yr option periods. The FSO will be able to receive up to 630,000 bpd of oil and store 2.2 million bbl of oil.", "These last years the conversion of VLCC (Very Large crude Carrier) in FPSO (Floating, Production, Storage and Offloading) unit has been used by Petrobras in Brazil offshore to work in the exploitation of oil in deep, what is a consequence of the necessity of large storage unit with the capability to transfer the oil to shuttle ships. A group of VLCC hulls was converted to FPSO, with the installation of oil process plants, turrets and so on. The internal conversion solves the questions about the processing, the storage and the oil offloading, but the external hull was not properly designed to respond to the waves, currents and the wind as a stationary unit. Many studies have been more recently developed to discuss the stability of this kind of system, the use of spreading mooring system with different tensions on the lines, the use and the position of a turret, the use of stabilization devices, as doubled rudder, propeller, tugs, etc... Sphaier, Fernandes and Correa (2000a) developed a maneuvering model and a procedure to study the stability of the FPSO and the FPSO and a shuttle during the offloading operation. Looking for the even increasing oil exploration activities and discover of new oil fields in deep water the paper presents a way to establish the main dimensions of a new FPSO in the preliminary design based on stability criteria for the motion in the horizontal plane. The stability problem is formulated in a similar approach as in Sphaier, Fernandes and Correa (1999 and 2000b). But, instead of verifying the stability of the system from known hydrodynamic coefficients, the analytical expression for the eigenvalues is developed as a function of the main dimensions of the floating unit. Due to the complexity of the analytical treatment of the problem the symbolic processor capability of the Mathematica package was explored. The use of additional stabilization devices is also addressed." ]

[ "Considering demands for internal Brazilian market and international crude oil trade, PETROBRAS has taken the decision to concentrate a significantly part of the future of crude oil production from three deep-water fields; Roncador, Marlim Sul and Marlim Leste, all of which are in Campos Basin, with one off-shore terminal. The name of this project is PDET. This project comprises of a fixed central pumping station, PRA-1, a large FSO (2,1 million barrels storage capacity), and two calm buoys systems, at a depth of 100 m. The start-up of this project involves the crude oil from three producing platform; P-52, P-51 and P-53, which are all currently under advanced construction. In the future PDET will receive the production of crude oil from two additional new platforms. Each producing platform will have its own export pipeline, direct to PRA-1. The peak production of this system will achieve 600,000 bbl/day. PRA-1 will have special requirements to pump crude oil either to FSO or to the calm buoys systems. Based on a steel jacket structure the capacity of power generation will be 75 MW, up to 34 inches pigging capacity and many diverse pipings. The FSO has special specifications such as the electrical power and optical swivels, both are at a high level of technology and capacity. To achieve system's targeted reliability extensive studies were done. Integrity protection system, leak detection system, offloading time, sub-sea layout and flow rates were taken into consideration. Environmental risks were fully mitigated. The final configuration, which achieved high standard integrity assurance, produced a valuable project. This paper describes the logistics of this project focusing PRA-1 pumping, the export system through calm buyos, sub-sea facilities and the FSO. Also it will be highlighted some management programs used to implement this project. This work reviewed the major aspects of implementing this important infrastructure offshore facility to transport crude oil. Several technical and managerial challenges were surpassed through introduction of new technologies, tools and techniques." ]

[ "A1012" ]

[ "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "This paper addresses the results from a monitoring inspection as part of Petrobras regular plane of inspection of rigid pipelines (PIDR) and numerical Finite Element analysis (FEA) of two parallel HP/HT subsea pipelines operating in Brazilian deepwater subjected to lateral buckling and walking behaviors. The results obtained from inspection and numerical reanalysis furnishes important feedback for the integrity management of the two pipelines, reducing potential risks and lessons learned for future projects. Deepwater pipelines submitted to high pressures and temperatures (HP/HT) are susceptible to global buckling due to axial compressive load. To guarantee pipeline and equipment’s integrity frequently is necessary to relieve high stresses and strains at buckle apex as well as to mitigate end expansion. Thus, the two parallel HP/HT pipelines were designed with single and double sleepers to trigger buckles at pre-determined locations and an anchoring system to prevent pipeline walking. Another important design aspect was to avoid undesirable buckles at the several crossings along the pipeline route applying a special device with stoppers to lock lateral displacements. During a programmed inspection as part of regular Petrobras pipeline integrity program of rigid pipelines (PIDR), it has been verified that some double sleepers didn’t work as foreseen in design. Otherwise, some unplanned buckles on soil have been formed along the two pipelines changing the buckle apex stress levels and end expansions foreseen in detailed design. In order to understand buckle formation behavior and guarantee long-term integrity of the HP/HT pipelines a Multi-Beam Echosounder Survey (MBES) was conducted in 2016 to build a representative Finite Element (FE) model. The temperature and pressure gradients from steady state and transient conditions were obtained from flow assurance simulations based on monitored platform operational historic data. The FE model was calibrated with buckle shapes and end displacements to assess pipeline behavior and its long-term integrity for load scenarios different from original design.", "Foreseeing near future opportunities for oil and gas fields, Petrobras created a corporate program dedicated to study, develop, and implement Digital Integrated Field Management (GeDIg) among its production assets. Over the last three years, Petrobras has been developing a pilot strategy based on multiple scenarios to evaluate the technology level of digital oilfields. Six assets were chosen, taking into account the diversity of production processes (heavy oil, offshore, onshore, brown, and green fields) found all over the Brazilian fields. Two different approaches were implemented: in-house development and partnership with integrated companies. Petrobras program is supported by three fundamental elements: people, process, and technology. Humanware, workflow processes, and change management are the key factors for new technologies implementation such as collaboration centers, intelligent completion, and fast loop artificial lift optimization. After the pilots first year of operation, lessons learned will be gathered to guide the expansion of the digital oilfield concept for other Petrobras assets. The objective of this work is to describe the methodology applied in the six pilots and how Petrobras is going to improve its digital way of work and add value to its assets with Digital Integrated Oil and Gas Field Management.", "This paper shows work performed through a Joint Industry Project (JIP), aimed to enable repairs made from composite materials to be applied to metallic structural components of offshore platforms in general and FPSOs in particular. The basic motivation was to provide a repair methodology that would cause a reduced impact to platform operations, particularly in classified areas. The focus on FPSOs derived from the fact that most of them are converted tankers, originally designed for overhauling in suitable docks from time to time. That is no longer possible once they are deployed as floating platforms, intended to stay in place for twenty years or more. An important prerequisite was that the repair procedure had necessarily to have the approval of the Classification Society of the platform. The project was conducted in three phases. The objective of the first phase was to develop a qualification procedure for the repair of relevant defects with adhesive patches and to demonstrate its feasibility with simple examples. Along phase two a Project Recommended Practice for Patch Repair was issued and more qualification tests were performed. Phase three consisted of a practical application of the Recommended Practice, accomplished within Petrobras by a repair at a ballast tank of the production semisubmersible platform P-20, in operation at Campos basin. The repair was accomplished by means of carbon fiber reinforcements within a vinylester matrix. This paper describes the P-20 repair case and the design of the bonded repair. A brief overview is presented of the installation of the repair, quality assurance issues and needs for future follow-up. The experimental and theoretical studies performed in support of the repair trial are briefly described. The successful repair trial demonstrates the utility of bonded repairs in managing the integrity of offshore steel structure assets.", "The Papa Terra oil field is located on the BC-20 Block in the Campos Basin - Brazil (110 kilometers away from Rio de Janeiro state coast) in a water depth of 1,200 meters. The field is operated by Petrobras having Chevron as non-operator partner. Papa Terra has a crude oil with an API index between 14 and 17 degrees. The field is among one of the most complex subsea developments ever executed in Brazil with its first oil performed in 2013 and the production subsea facilities installation completed in 2014. The proposed design for the subsea production system was the use of an Electrically Trace Heated Integrated Production Bundle (ETH-IPB), the 3rd generation of this field proven technology, which was successfully designed, manufactured and installed by Technip on previous West African projects. A total of 27 km of ETH-IPB riser and flowline as well as its own electrical and monitoring module have been designed, manufactured, installed and successfully commissioned for the Papa Terra project. The core of the ETH-IPB is a 6 ID flexible pipe dedicated to production fluid. Around the core, the following components are distributed into a bundle layer: Heat tracing cables designed to provide active heating of the production fluid during warm up or after a shut-down. A Distributed Temperature Sensor (DTS) fiber optic system, deployed offshore into a stainless steel tube loop in order to provide temperature monitoring along the length of the riser and flowline system. Spacers, designed to protect the electrical cables and fiber optic tubes from mechanical loadings during installation and manufacturing. The main aim of this paper is to describe the design of this production system, that was used for the first time in Brazil and which present a lot of innovations in several domains, due to overall length, thermal requirements, heating control and riser to flowline electrical connection on the seabed. Some results of the qualification program will be presented, in particular mechanical, bundle components, fatigue and thermal performance tests. Finally, results of the field performance tests and operational feedback by Petrobras will be presented and discussed.", "In the presence of the President of the Republic, Luiz Inácio Lula da Silva, the BrasFels S/A shipyard launched to the sea the $(US)1 billion P-51, the first semi-submersible platform built entirely in Brazil. Ordered by Petrobras, the unit is programmed to operate in the Marlim Sul field, Campos basin, state of Rio de Janeiro with 75% of the goods and services applied to the construction provided by Brazilian companies. In 2010, the P-51 will reach its maximum operating capacity of 180,000 bpd of petroleum and 6 million cu m/day of gas. The P-51 will provide about 8% of the national petroleum production. The P-51 will be strategic with respect to increasing the supply of gas to Brazil under Plangás (Plano de Antecipação da Produçäo de Gás Natural). The P-51 is also part of the PDET (Plano Diretor de Escoamento e Tratamento) of the Cuenca basin. Of the 6 million cu m/day of gas produced, a part will be for internal consumption in the P-51 such as fuel to generate electricity and the rest will be sent to dry land. Brazil wants a naval construction base that will supply the needs of Brazil and the entire world. The P-51 will be anchored in the Marlim Sul field of 1,255 m depth 150 km offshore and will be connected to 19 wells (10 producing oil and gas and 9 injecting water) and will produce 22° API. The 9 water injection wells will inject 282,000 bpd of water. Energy use will be 100 Mw, enough energy to light a city of 300,000 persons. The patroness of the P-51 platform was the First Lady of Brazil, Marisa Letícia Lula da Silva.", "Petrobras launched the PDBC (Campos Basin Development Plan) as part of Company's Strategic Plan to increase production and incorporate reserves in a scenario of mature fields and low oil prices. The plan is based on an integrated analysis of opportunities, combining skills of professionals with different backgrounds, allowing cost reduction and the deployment of technical solutions. It also has defined shortand long-term actions to achieve these goals. In the short-term horizon, actions included campaigns to remove damage of producer and injector wells, improvements in artificial lift methods, reduction of time required for projects approval, early drilling of wildcats, improvements in the efficiency of water injection, among others. In the long term, Petrobras performed a critical analysis of the recovery factor for each reservoir, identifying bottlenecks and evaluating technological solutions with multidisciplinary teams. Results indicate a significant increase in production in 2017 and the proposal of new projects in these fields. This paper presents the methodology used in the program and the results obtained so far for the giant oil fields of Roncador, Marlim Sul, Marlim Leste, Barracuda, Caratinga and Albacora Leste, responsible for approximately 20% of all Brazilian production. It also presents the future applications in fields where reduction of costs and technical solutions can contribute to increase production and reserves.", "Large volume semi-submersible units may present significant wave induced resonant motions in heave, roll and pitch. Evaluating the slow motions of such systems is important from the initial stages of their designs and therefore requires a model that is both accurate and expedite enough. In the present article, different options for modeling the second-order hydrodynamic forces and induced motions are discussed using as a case-study the PETROBRAS 52 unit - P-52. Computations of the low frequency forces are performed in the frequency domain by means of a commercial Boundary Element Method (BEM) code. Different hydrodynamic approximations are tested and evaluated by directly comparing the predicted responses with those measured in small-scale tests performed in a wave-basin. From the results obtained in theses comparisons, a methodology based on a white-noise approach of the force spectrum is proposed. The validity of such approximation is attributable to the typically low damping levels in heave, roll and pitch motions. Furthermore, results also indicate that the second order forces may be calculated disregarding the free-surface forcing components, an option that helps to reduce the computational burden even more, rendering the procedure suitable for preliminary design calculations.", "Currently, the Port of Santos is the largest in Latin America, and its access channel is in the process of deepening, intending to reach 17 m DHN as an ultimate goal. Specifically for the maritime bar section, which is now maintained only by dredging, a significant increase in the volume of maintenance dredging is expected. The current study applied the physical modelling to evaluate the effectiveness of two curved jetties in the maintenance of depth along the inlet entrance of Santos channel, its impact on the dispersion of the plume of effluents from the existing outfall and its influence on the beach adjacent to the proposed right jetty. As a result, the jetties’ layout could maintain the access channel’s depth with a much lower volume of dredging than the current maintenance requires. It was found that the increase of 1.2 km on the outfall’s original length would not only reduce the influence of the jetties’ presence, but also improve significantly the dispersion of effluents in comparison to the original situation. Moreover, the presence of the jetties induces a marine accretion that tends to protect the region adjacent to the inlet, which is currently suffering a severe erosion process. Finally, the study shows that it is completely feasible to adopt the curved jetties to transpose the Port of Santos’ maritime bar, which may be configured as an economic and attractive option to maintain depths of 17 m DHN.", "The paper uses a case study approach to present the challenges to develop a large and thick oil carbonate reservoir, full of opportunities but also of uncertainties. Additionally, Libra block development is under a Production Sharing Contract that was awarded to a Consortium where Petrobras is the operator in partnership with Shell, Total, CNOOC Limited and CNPC. This paper will present the main subsea technological achievements made during the execution of the Libra Extended Well Test (EWT) Project so far and also future technologies that will contribute to overcome the full field development challenges." ]

[ "When Petrobras' Garoupa Field production tower collapsed last September 7, the company replaced it with a provisional early production system designed to restore production until permanent platforms and pipe lines could be installed. This provisional system uses the seafloor pipe line, meter, loading tower and processing ship (Presidente Prudente Moraes) remaining from the original production system. These holdovers were combined with a 208-ton, 12-m-dia. monobuoy, an electronics control ship (Star Offshore Services marine's Star Hercules and a specially designed pipe line and manifold. This contingency system handled more than 30,000 bopd production from Garoupa and Namorado Fields while Garoupa's permanent platform was readied." ]

[ "A893" ]

[ "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market.", "Campos Basin, the main production province in Brazil, was discovered in 1974. It is located on the North coast of the Rio de Janeiro State and comprises an area of around 115,000 km2 (28,400 acres), as shown in Figure 1. The producing oil fields are between 70 and 150 km (43 to 93 miles) far from the seashore. It started its production on August 13th, 1977 with 10,000 bopd (barrels of oil per day) from the well 1-EN-01-RJS, which produced to a semi-submersible platform; this well has produced nearly 35 million barrels of oil until February 1998, when it was shutdown for economical reasons. Today, after more than twenty-five years of continuous operation, the overall production system comprises 13 fixed platforms and 24 Floating Systems distributed among 42 oil fields, which account for the production of 1.21 million bopd - which corresponds to more than 80% of Petrobras oil production, plus 18.9 million m3 of gas per day - or 43% of the gas production (as of December 2002). Such an evolution was supported by investments in exploration and production development, in deepwater technology developments and in continuous management improvement. This paper describes the main driving forces to exploit Campos Basin - especially its deep and ultra-deepwaters fields, the technological and production developments performed, the experience accumulated by Petrobras along these 25 years of operations as well as its contribution to the global oil industry.", "With the prospect of about 200,000 bpd of crude oil productions from offshore fields operated by Petrobras being added to output in 2005, Brazil should be very close to self-sufficiency by the end of the year. Delays to the completion of three large platforms, which have now taken up stations at fields in the Campos Basin, coupled with declining production at several other aging fields at Campos and elsewhere, meant that an average of 50,000 bpd less was produced in 2004 than in 2003. The reduction occurred during a year when, after remaining static for 3 yr, demand increased by 3.5% to average 1.76 million bpd in 2004. as a result, the company had to import 173 million bbl of crude in 2004. The imported products, mainly diesel, naphtha, and LPG, cost about $10 more per barrel in 2004 than they had in 2003. A discussion covers impact of product prices; gas production; political matters; and newbuild vessels.", "The Shell operated BC-10 field located in deepwater, 1650-1920m (5500 -6400 ), offshore Brazil produces heavy oil in the range of API 16-24. Due to the low reservoir energy and deep water environment, 100% of BC-10 production has artificial lift. Mudline caisson separators with ESPs (Electrical Submersible Pumps) are used to process fluids from multiple wells and boost them to the receiving FPSO. These caissons are 80-100m (260 -330 ) deep and each houses a 1600HP pump. The 4 distinct fields are located approximately 8-14km from the producing FPSO and there are significant flow assurance challenges in operating the asset. Over the past 5 years, production optimizations have been trialed and implemented some successful, some not. In this paper several examples will be given of production optimization which has resulted in increased throughput of the system without mechanical modifications, reduced OPEX on chemicals and taken advantage of natural changes in fluid properties as the field has aged. The optimizations included; caisson foam management to enhance flowline lift, subsea demulsifier injection for viscosity reduction and alterations to gas-liquid subsea separation to achieve high and low GOR operation. Through these optimizations, it is estimated that 2MM bbl additional volumes were produced in 2013-2014 together with a $4MM US/year reduction in chemical usage. The enabling factors for these optimizations will be examined in relation to system design and surveillance.", "The Parque das Conchas (BC10) field offshore Brazil, operated by Shell and owned together with ONGC and QPI, has challenging reservoir conditions. Several subsea fields with viscosities ranging from 1 to 900 cP and gas volume fractions between 5% and 70% require subsea boosting to lift production fluids to the FPSO facility. Since first oil in 2009, a unique method of subsea separation and boosting has been deployed on BC-10, utilizing vertical caisson separators with Electrical Submersible Pumps (ESP's) to pump well fluids from up to 2000m water depth to the FPSO facility. Maintenance of the ESP assemblies requires an intervention using a MODU (Mobile Offshore Drilling Unit). Shell pursued an alternative subsea boosting solution using Mudline Pump (MLP) technology, with the objective to reduce field Opex and increase redundancy. The MLP was conceived as a retrofit module, which was to be fully compatible with the existing infrastructure. This includes using existing variable frequency drives, high voltage umbilicals, subsea mechanical interfaces, controls, hydraulics, and chemical injection. Despite the prior development of a 3 MW (megawatt) MudLine Pump (MK1), the specifics of the BC10 application required further development and qualification. The design pressure was increased from 5,000 psi to 7,500 psi, which required requalification of motor and barrier fluid circuit components. Additionally, the challenging multiphase flow conditions led to the development of an innovative control strategy to maximise the production window, whilst ensuring safe operating conditions for the pump within the existing system constraints.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "Forty-four companies competed for 23 blocks - 13 offshore and 10 onshore - in Brazil's second bid round in June 2000. That 21 of the 23 blocks on offer were licensed shows that the country remains a big draw among E&P firms. The top bidders include a consortium between Santa Fe Snyder (operator, 45%) and Construtora Norberto Odebrecht (15%), which paid 12.025 million real ($6.68 million) for Block BM-C-8 in the Campos basin; Shell, which offered 65.16 million real for the hotly contested Campos Block BM-C-10, for which it was the sole bidder; and Petrobras, with eight winning bids.", "The Petroleo Brasileiro SA (Petrobras), a state-owned oil company utilizes its floating production storage and offloading (FPSO) P-50 vessel to 16 production wells at the Albacora Leste field in Campos basin. FPSO symbolizes Brazil's plans to reach oil self-sufficiency by mid-2006. The FPSO will process oil pumped from the field 150 km off Rio de Janeiro and each peak production of 180,000 b/d by August, which represents around 10% of Brazil's crude oil output. The P-50 will also be able to handle 6M cu m/day of natural gas. The P-50 and P-34, also an FPSO, are to begin processing 20,000 b/d of oil at Jubarte field. They will raise national production to 1.9M b/d in 2006, surpassing domestic needs and making Brazil reach oil self-sufficiency.", "This study estimates oil production curves applying single and multi-cycle Hubbert models and Hubbert variants for the case of Brazil. The application of a top-down modeling approach is necessary, as the size of oil fields discoveries is usually confidential data and therefore not disclosed in Brazil. Despite fragilities of curve fitting methodologies, this approach therefore continues being widely used, due to its simplicity and relatively low data requirement. The classic Hubbert methodology was improved in this study by considering the asymmetry of production. Additionally, a hybrid model considering techno-economic aspects explains the deviation of the crude oil production rate from the prediction of the Hubbert curve by means of regression analysis. This analysis indicates that the deviation of the crude oil production rate from the Hubbert curve follows, with a four-to five-year lag, changes in oil price. The findings show that the URR of Brazil's post-salt offshore basins hover between 15 and 21 billion barrels of oil. An annual average growth rate of 8% in the pre-salt oil fields can compensate for the decline in post-salt offshore oil production for the period 2016-2025. Error and URR estimates stabilize after peak production for single and multi-cycle Hubbert curves, though the single cycle model proved to be more unstable before peak production than the multi-cycle models.", "BG Group recently produced a new estimate on the Tupi oil discovery in the Santos basin, stating that the field contains 12-30 billion boe or more. On the one hand, Brazil's Petroleo Brasileiro SA (Petrobras) did not comment on the revised production estimate. It can be remembered that Petrobras reported the discovery to be 8 billion bbl of light crude in 2007. Meanwhile, BG claim have been produced in a statement regarding the company's long-term growth strategy, released ahead of the presentation of its fourth-quarter results." ]

[ "Distribution of ocean benefits and disbenefits Developments in tourism Tourism has generally been increasing fairly steadily for the past 40 years (with occasional setbacks or slowing down during global recessions). In 2012, international tourism expenditure exceeded 1 billion dollars for the first time. Total expenditure on tourism, domestic as well as international, is several times that amount. The direct turnover of tourism contributed 2.9 per cent of gross world product in 2013, rising to 8.9 per cent when the multiplier effect on the rest of the economy is taken into account. The Middle East is the region where tourism plays the smallest part in the economy (6.4 per cent of GDP, including the multiplier effect), and the Caribbean is the region where it plays the largest part (13.9 per cent of GDP, including the multiplier effect). Most reports of tourism revenues do not differentiate revenues from tourism directly related to the sea and the coast from other types of tourism. Even where tourism in the coastal zone can be separated from tourism inland, it may be generated by the attractions of the sea and coast or its maritime history, as it may be based on other attractions not linked to the marine environment. Consequently, the value of ocean-related tourism is a matter of inference. However, coastal tourism is a major component of tourism everywhere. In small island and coastal States, coastal tourism is usually predominant because it can only take place in the coastal zone in those countries. Particularly noteworthy is the way in which international tourism is increasing in Asia and the Pacific, both in absolute terms and as a proportion of world tourism. This implies that pressures from tourism are becoming of significantly more concern in those regions. Tourism is also a significant component of employment. Globally, it is estimated that, in 2013, tourism provided 3.3 per cent of employment, when looking at the number of people directly employed in the tourism industry, and 8.9 per cent when the multiplier effect is taken into account. In the different regions, the proportion of employment supported by tourism is approximately the same as the share of GDP contributed by tourism, although, again, what proportion is based on the attractions of the sea and coast is not well known." ]

[ "B2555" ]

[ "Scale and distribution of tourism Tourism affecting the ocean, other than cruising, is predominantly located in the coastal zone. Statistics are not available globally to show the scale of tourism in the coastal zone. Because of their geography, some countries with large tourism industries, such as Greece, inevitably have a very large proportion of that industry in coastal areas. Elsewhere, evidence from different regions of the world continues to show that coastal tourism remains a major component of overall tourism. For example, in addition to the evidence quoted in the first Assessment: In the countries of the European Union, four of the five regions with the highest levels of tourist activity in 2016 (Canary Islands, Catalonia, Adriatic Croatia and Balearic Islands) were coastal regions (the other region was Île-de-France, around Paris) (European Commission, 2018); The percentage of tourists in the Republic of Korea who visited the coastal zone increased from 49.5 per cent in 2000 to 69.1 per cent in 2010, and the total number of beach visitors in 2014 was 69 million (Chang and Yoon, 2017); Destinations in the four coastal provinces of Northern Cape, Western Cape, Eastern Cape and KwaZulu-Natal in South Africa accounted for 28 per cent of the total tourism trips and 40 per cent of total tourism spending in 2015. Overall, coastal destinations were dominated substantially by domestic tourists: 9.8 million domestic tourism trips as compared with 1.6 million international tourist trips; tourism activity is particularly concentrated around Cape Town and in the eThekwini Metropolitan Municipality (which includes Durban), which in 2015 together accounted for 75 per cent of total tourism spending in South African coastal areas (Rogerson and Rogerson, 2018, 2019). International travel and associated tourism play a major role in many parts of the world, in particular in the “sun, sea and sand” type of tourism. The relatively rapid rate of growth in international travel observed in the first Assessment continued throughout the 2010s (table 3) and between 2011 and 2017. Throughout the world as a whole, the rate of growth in the numbers of international tourists continued between 2011 and 2017 at above the longterm rate, reaching an annual average rate of 5.7 per cent, slightly higher than that reported in the first Assessment. The estimated income derived from international tourism has continued to grow globally, at an annual average rate of 4.0 per cent, but not in line with the number of tourists. That implies that, on average, tourists are spending less. However, the global growth in tourist numbers is sufficient to more than offset the decline, and the share of tourism in export earnings globally has continued to increase (World Bank, 2019). Global patterns in numbers of tourists and expenditure vary significantly between regions (table 4). The absolute scale of tourism in different regions also varies significantly. Collectively, some of the countries in South Asia and South-East Asia (Bangladesh, India, Maldives, Myanmar and Pakistan) achieved a 119 per cent increase in inbound international tourist numbers between 2011 and 2017 (although from a relatively low base), far outstripping other regions. Other regions have, in general, experienced growth rates of less than 10 per cent (table 4). Nevertheless, Caribbean States, such as the Dominican Republic and Jamaica, have had growth rates of around 25 per cent, well above the regional average (World Bank, 2019). The Middle East and North Africa has experienced relatively low growth in tourist numbers, but a substantial growth in tourist income, suggesting that the tourist industry is offering more upmarket experiences (World Bank, 2019). Domestic tourism dominates the tourist market in most major economies (figure V), with 73 per cent of expenditure on tourism and travel derived from domestic sources globally (World Tourism and Travel Council (WTTC), 2018). While it will include much tourism and travel that does not have an impact on the marine environment, coastal tourism is, as noted above, a major component of total tourism. Domestic tourism has grown generally in line with total tourism, and growth rates are estimated at over 10 per cent per year in many Asia-Pacific countries, such as China, Malaysia and the Philippines, over the period 2011–2017 (WTTC, 2018).", "While some benefits from the ocean are very central and ensure the existence of life on earth, including the production of oxygen and the uptake of carbon dioxide and heat, most services are related to specific ecosystems or elements therein and are thus not evenly distributed. Moreover, not all States have the capacity to participate fully in and benefit from the ocean and its resources. That may be because they either do not have access to the ocean, such as landlocked States, or do not have the financial means to develop maritime industries, which is the case for many developing countries. Some States do not have the capacity for access to areas beyond national jurisdiction or even parts of their own exclusive economic zone. For example, in areas beyond national jurisdiction, the collection of marine genetic resources, their sequencing and potential commercialization are currently concentrated in a small number of countries (Blasiak and others, 2018; 2019; Harden-Davies, 2019; Levin and Baker, 2019). One of the main provisioning services, living resources, is not only unevenly distributed, with productivity hotspots concentrated in the upwelling areas of the world (Kämpf and Chapman, 2016), but a very substantial proportion of capture fisheries is carried out by relatively few fishing vessels from few States. Vessels from 25 States took 42 per cent of the global catch in 2016 (FAO, 2018). Thus, profits are not necessarily going to the countries with the exclusive economic zone in which the fishes are produced. McCauley and others (2018) found that vessels flagged to higher-income nations, for example, are responsible for 97 per cent of trackable industrial fishing on the high seas and 78 per cent within the national waters of lower-income countries. Economic assessments of the cultural benefits of ecosystem services are increasingly undertaken by applying environmental valuation methods to recreational uses such as tourism, marine recreational fishing, whale watching, and enjoying the seascape (Hanley and others, 2015; Aanesen and others, 2015; Spalding and others, 2017), as well as non-use values (i.e., existence and bequest values) of coral reefs and other marine biodiversity (Aanesen and others, 2015; Navrud and others, 2017). Tourism relies particularly on specific characteristics such as coral reefs (Brander and others, 2007) and specific activities such as cruise tourism, and are concentrated in certain areas such as the Caribbean and the Mediterranean but increasingly in polar areas too (see chap. 8A).", "About 40 per cent of the world’s population lives in the coastal zone, that is, within 100 km of the coast. The proportion is increasing. Coastal communities play a key role in supporting all components of the ocean economy, as well as a range of social and cultural values, and all forms of coastal and marine management and governance. While coastal communities often have to deal with physical and social vulnerabilities, they are crucial contributors to conservation, to marine hazard responses and to climate mitigation and adaptation. The ocean supports a wide range of economic activities, including the harvesting of food, shipping, seabed mining, offshore hydrocarbon exploration and exploitation, tourism and recreation, use of marine genetic resources, production of fresh water by desalinization and production of salt. The various economic activities are steadily growing in scale. Separate chapters in part 5 of the present Assessment, on trends in pressures on the marine environment, give more detail on areas not discussed in depth here. Shipping carries about 90 per cent by volume of international trade, which makes it fundamental to the global economy. It is still recovering from the economic crisis of the period 2008–2011. Globally, tourism continues to grow at about 6 per cent per year. Coastal tourism represents a substantial proportion of overall economic activity for many countries, especially small island developing States and archipelagic States. Shipping and tourism have been seriously dislocated by the COVID-19 pandemic. Desalinization continues to grow in importance, in particular in the Middle East, North Africa and small island States and archipelagic States. Sea salt production also continues at a generally steady level, but accounts for only about one eighth of total salt production.", "Distribution of ocean benefits and disbenefits Developments in maritime transport All sectors of maritime transport (cargo trades, passenger and vehicle ferries and cruise ships) are growing in line with the world economy. It is not possible to estimate the earnings from those activities, as the structure of the companies owning many of the ships involved is opaque. It seems likely that many of the major cargo-carrying operators were making a loss in 2012, as a result of overcapacity resulting from the general economic recession. On the other hand, cruise operators reported profits. According to estimates by the United Nations Conference on Trade and Development, owners from five countries (China, Germany, Greece, Japan and the Republic of Korea) together accounted for 53 per cent of the world tonnage in 2013. It seems likely that profits and losses are broadly proportional to ownership. Among the top 35 ship-owning countries and territories, 17 are in Asia, 14 in Europe and 4 in the Americas. Worldwide, there are just over 1.25 million seafarers, only about 2 per cent of whom are women, mainly in the ferry and cruise-ship sectors. The crews are predominantly from countries members of the Organization for Economic Cooperation and Development and Eastern Europe (49 per cent of the officers and 34 per cent of the ratings) and from Eastern and Southern Asia (43 per cent of the officers and 51 per cent of the ratings). Africa and Latin America are noticeably underrepresented, providing only 8 per cent of the officers and 15 per cent of the ratings. Pay levels of officers differ noticeably according to their origin, with masters and chief officers from Western Europe receiving on average a fifth or a quarter, respectively, more than those from Eastern Europe or Asia, while pay levels for engineer officers are more in line with one another. The recent entry into force of the Maritime Labour Convention, 2006 should be noted in the context of the social conditions of seafarers.", "Patterns of biodiversity Biodiversity and economic activity Sometimes, because of the special physical features that contribute to high biodiversity, and sometimes because of the concentration of biodiversity itself, many societies and industries are most active in areas that are also biodiversity hotspots. As on land, humanity has found the greatest social and economic benefits in the places in the ocean that are highly productive and structurally complex. For example, 22 of the 32 largest cities in the world are located on estuaries; mangroves and coral reefs support smallscale (artisanal) fisheries in developing countries. Biodiversity hotspots tend to attract human uses and become socioeconomic hotspots. Hence biodiversity-rich areas have a disproportionately high representation of ports and coastal infrastructure, other intensive coastal land uses, fishing activities and aquaculture. This is one of the major challenges to the sustainable use of marine biodiversity. Some marine features, such as seamounts, often found in areas beyond national jurisdiction, have high levels of biodiversity, frequently characterized by the presence of many species not found elsewhere. Significant numbers of the species mature late, and therefore reproduce slowly. High levels of fishing have rapidly undermined the biodiversity of many such features, and risk continuing to do so in the absence of careful management. New forms of economic activity in the open ocean, such as seabed mining, and the expansion of existing forms of activity, such as hydrocarbon extraction, have the potential to have major impacts on its biodiversity, which is to date poorly known. Without careful management of those activities, there is a risk that the biodiversity of areas affected could be destroyed before it is properly understood.", "Passenger traffic Passenger traffic is almost entirely carried on local ferries or on cruise ships. The pattern of ferry traffic remains as described in the first Assessment, but the level of traffic has grown steadily (International Shipping Economics and Logistics (ISL), 2017). The activities of cruise ships have also continued to grow steadily with the increased global market for cruising: the number of passengers is increasing at an average of about 5 per cent per year (figure III). The size of individual cruise ships is also growing steadily (figure IV). The overall market remains dominated by passengers from the United States (about 50 per cent of the total market) and the global distribution of cruising remains largely as described in the first Assessment, with the major focuses being the Caribbean and the Mediterranean, which together accounted for a little over half of all traffic in 2017 (Cruise Lines International Association (CLIA), 2018). The first Assessment noted the relatively recent, but rapid, growth of tourism to Antarctica, in particular with regard to cruise ships – from 27,324 cruise ship passengers in the 2003– 2004 season to 37,044 in the 2013–2014 season, which is an increase of 35 per cent. The growth has continued, reaching 51,700 in the 2017–2018 season (an increase of a further 40 per cent), with a forecast of further growth to 55,750 in the 2018–2019 season. Over 80 per cent of the tourists land on Antarctica (International Association of Antarctic Tour Operators (IAATO), 2018). Passenger landings and marine traffic are highly concentrated at a few specific locations, in particular along the Antarctic Peninsula’s south-western coast. Growth in Antarctic tourism is closely correlated with the economies of the countries sending the most visitors to the region: 60 per cent of the tourists come from the United States (33 per cent), China (16 per cent) and Australia (11 per cent). The proportion of tourists from China increased significantly between 2013 and 2014 and between 2017 and 2018. Markets for Antarctic travel are probably far from saturated, and demand is therefore likely to continue to grow (Bender and others, 2016). Apart from some categories, such as private yachts, that shipping traffic is covered by the new mandatory Polar Code (International Maritime Organization (IMO), 2015). Tourism is also increasing rapidly in the Arctic: summer tourism quadrupled and winter tourism increased by over 600 per cent between 2006 and 2016, although large areas remain unaffected. The increase is likely to have an impact on Arctic ecosystems and communities, especially as new parts of the Arctic open up with less sea ice, new airports and continued promotion of the area (Runge and others, 2020). In 2020, passenger traffic on ferries dropped significantly early in the year as a result of the COVID-19 pandemic, but, by August 2020, it was beginning to recover (e.g., EMSA, 2020). Cruise ship activity has plummeted for the same reason: in August 2019, there were 1.8 million persons on board cruise ships; in August 2020, there were only a small number of crew (EMSA, 2020).", "Ocean resources provide the basis for the livelihoods of millions of people across the globe, as well as a range of critical ecosystem services, including oxygen production and carbon storage, several biodiversity-related services, such as the harvesting of living resources, coastal protection and genetic resources (Mohammed, 2012) and cultural and amenity services (Whitmarsh, 2011). The most commonly valued services are tourism and recreation, as well as storm protection (Mehvar and others, 2018). Fisheries alone provide multiple benefits to millions of people, including those living in poverty in the coastal communities of low-income countries. Fishes and other seafood are a major source of food, protein and micronutrients for many vulnerable communities. It is estimated that, in 2016, 59.6 million people were employed in the primary sector of capture fisheries and aquaculture, with a great majority in low-income countries (although that figure includes some inland activities). With the addition of those who work in associated processing, marketing, distribution and supply industries, it is estimated that fisheries and aquaculture support nearly 250 million livelihoods (Food and Agriculture Organization of the United Nations (FAO), 2018). Benefits from marine and coastal ecosystems can be categorized in several ways. Traditionally, they have been understood in terms of goods (i.e., products, resources and harvests from nature with a market value), services (i.e., processes that sustain all forms of life but do not have a market value) and cultural benefits (i.e., spiritual and religious heritage, with no explicit market value). While goods have a direct use (consumptive) value, determined through market prices, services and cultural benefits have an indirect use (non-consumptive) value that can be determined through the application of a variety of valuation techniques (see figure). Provisioning services of marine and coastal ecosystems The ocean provides a multitude of direct and indirect benefits of value to humans. The most direct benefit that marine and coastal ecosystems provide is through their primary productivity and the resulting products, such as fishes, plants, animals, fuel, timber (e.g., mangroves), biochemicals, natural medicines, pharmaceuticals, raw materials (sand and corals) and, to a lesser extent, fresh water and fibre. In 2016, 79.3 million tons of marine fishes2 were caught, and 28.7 million tons of marine aquaculture species were farmed, supplying together an average of 14.6 kg of seafood per person on earth (FAO, 2018). Seafood is essential for food security: it provides more than 20 per cent of the average per capita animal protein intake for 3 billion people, and more than 50 per cent in some developing countries (FAO, 2018).", "Distribution of ocean benefits and disbenefits Developments in employment and income from fisheries and aquaculture The global harvest of marine capture fisheries has expanded rapidly since the early 1950s and is currently estimated to be about 80 million tons a year. That harvest is estimated to have a first (gross) value on the order of 113 billion dollars. Although it is difficult to produce accurate employment statistics, estimates using a fairly narrow definition of employment have put the figure of those employed in fisheries and aquaculture at 58.3 million people (4.4 per cent of the estimated total of economically active people), of which 84 per cent are in Asia and 10 per cent in Africa. Women are estimated to account for more than 15 per cent of people employed in the fishery sector. Other estimates, probably taking into account a wider definition of employment, suggest that capture fisheries provide direct and indirect employment for at least 120 million persons worldwide. Small-scale fisheries employ more than 90 per cent of the world’s capture fishermen and fish workers, about half of whom are women. When all dependants of those taking full- or part-time employment in the full value chain and support industries (boatbuilding, gear construction, etc.) of fisheries and aquaculture are included, one estimate concludes that between 660 and 820 million persons have some economic or livelihood dependence on fish capture and culture and the subsequent direct value chain. No sound information appears to be available on the levels of death and injury of those engaged in capture fishing or aquaculture, but capture fishing is commonly characterized as a dangerous occupation. Over time, a striking shift has occurred in the operation and location of capture fisheries. In the 1950s, capture fisheries were largely undertaken by developed fishing States. Since then, developing countries have increased their share. As a broad illustration, in the 1950s, the southern hemisphere accounted for no more than 8 per cent of landed values. By the last decade, the southern hemisphere’s share had risen to 20 per cent. In 2012, international trade represented 37 per cent of the total fish production in value, with a total export value of 129 billion dollars, of which 70 billion dollars (58 per cent) was exports by developing countries. Aquaculture is responsible for the bulk of the production of seaweeds. Worldwide, reports show that 24.9 million tons was produced in 2012, valued at about 6 billion dollars. In addition, about 1 million tons of wild seaweed were harvested. Few data were found on international trade in seaweeds, but their culture is concentrated in countries where consumption of seaweeds is high.", "Economic activity Economic growth, measured as gross domestic product (GDP) per capita, has steadily increased globally, although it has slowed as a result of declining trade volume. Growth in the first half of 2019 stood at 1 per cent, the weakest level since 2012 (IMF, 2019). Economic growth, when averaged across the global population (with vast geographical variability in economic growth, as noted in sect. 3), has resulted in the average annual income of an individual increasing from $3,300 in 1950 to $14,574 in 2016. The slowdown in growth is largely associated with weak manufacturing and trade. In contrast, service industries such as tourism have grown (IMF, 2019). As the global population has grown and the demand for goods and services has increased, there has been an associated increase in energy consumption and resource use. Understanding the relationship between increasing economic activity and the use of natural resources is essential to identifying future sustainability and limiting impacts associated with extraction, production, consumption and waste generation (Jackson, 2017). Total energy demand, as measured in million tons of oil equivalent (Mtoe), grew from 13,267 Mtoe in 2014 to 13,978 Mtoe in 2018. At the same time, primary energy intensity, an indicator of how much energy is used by the global economy, slowed from 1.7 per cent in 2017 to 1.2 per cent in 2019 (IEA, 2019a). The slowing of efficiencies (i.e., the amount of GDP generated for the amount of energy used) is the result of a number of short-term factors, such as growth in fossil fuel-based electricity generation, and longer-term structural changes, such as a slowing transition towards less energy-intensive industries. At the same time, investment targeting energy efficiencies has been stable since 2014. Improvements in technical efficiency reduced energy-related carbon emissions by 3.5 gigatons of CO2 between 2015 and 2018 (IEA, 2019a). In addition, renewable energy production has grown as many countries shift to energy strategies that rely on it as part of efforts to reduce greenhouse gas emissions. Ocean energy production is part of many strategic developments and grew from 1 TWh (Terawatt hour) in 2014 to 1.2 TWh in 2018 (IEA, 2019b). Changes in energy production, including marine renewable energy and the pressures generated on the marine environment, are detailed in chapters 19 and 21. Economic activity associated with the extraction of marine resources also continues to grow as the global population expands. Marine and freshwater food production was a key protein provider and source of income for approximately 59.6 million people globally in 2016, an increase from 56.6 million in 2014. Although marine capture fisheries remain stable at around 80 million tons, mariculture is steadily increasing, from 26.8 million tons in 2014 to 28.7 million tons in 2016 (Food and Agriculture Organization of the United Nations, 2018). The implications for increasing marine food production demands, including overfishing, bycatch of endangered species and habitat loss or degradation by fishing and aquaculture, are described in detail in chapters 15–17. Many countries are developing or have developed strategies for the potential growth of maritime activities, such as ocean energy, aquaculture, marine biotechnology, coastal tourism and seabed mining (i.e., growth of the blue economy). However, an important constraint on the growth of ocean economies is the current declining health of the ocean and the pressures already being placed on it (Organization for Economic Cooperation and Development, 2016), many of which are detailed in Part 5.", "Impacts on the marine environment Throughout all tourist areas, the major impact on the marine environment comes from coastal development, including the proportion of land covered by buildings, such as hotels, restaurants and retail shops, and transport infrastructure, including ports, airports and train terminals, and the need for hard built coastal defences, street lighting and sewerage (see also chap. 14). Where such development is not subject to effective planning and management, impacts on marine flora and fauna can be disastrous. For example, at Vlora Bay in Albania, unplanned development over 15 years has resulted in the disappearance of 50 per cent of the seagrass meadows and a substantial reduction in macroalgae (Fraschetti and others, 2011). In tourist regions, beach feeding or beach nourishment, which is the replacement of sand on beaches which have had sand removed by coastal currents or extreme weather events, can have considerable economic benefits (Klein and Osleeb, 2010). For example, in the Republic of Korea, an evaluation of the economic benefits of the restoration of the Songdo beach at Busan after typhoon damage in 2003 put the benefits at about $230 million (Chang and Yoon, 2017). The management of beaches is a significant element in managing the impacts of coastal tourism on the marine environment. Beach cleaning and the building of sea walls are generally done to give “sun, sea and sand” tourists surroundings that they find more attractive, and they have significant effects on the local flora and fauna, as recorded in the first Assessment. Studies continue to show that beaches used extensively for tourism support ecosystems that are less rich than those of comparable beaches in the same vicinity that are in protected areas, for example, along the New Jersey coast in the United States, (Kelly, 2014) and near Cadiz, Spain (Reyes-Martínez and others, 2015), and that seawalls supported 23 per cent less biodiversity and 45 per cent fewer organisms than natural shorelines (Gittman and others, 2016). Other interventions to attract tourists to beaches have included the creation of artificial surfing reefs. The limited success of such structures was recorded in the first Assessment, but there is now a report of a new venture based on an inflatable artificial reef at Bunbury, Australia (West Australian, 2019). National legislation to promote public access to coasts and beaches can also be significant." ]

[ "Petrobras relies on a fleet of over 300 vessels to support the exploration and production of oil in Brazilian territorial waters. The fleet consists of vessels of various sizes, from Tug Supply vessels to Remotely Operated Vehicle (ROV) Support vessels. These support vessels are designed to aid E&P rigs in wide range of activities, from simple refueling units to specialized units responsible for oil well stimulation and seismic studies, diving vessels, ROV vessels, oil spill response vessels and anchor handling tug vessels. The entire fleet provides services to Petrobras through chartering contracts between shipping companies and Petrobras' operational sectors. In 2012 these vessels were involved in 95 recorded accidents that did not fall under the category of occupational accidents, such as crashes, collisions, chemical spills (including oil and oil denvates), floods, fires and strandings. Aiming to reduce the occurrence of these events, Petrobras has established a group, formed from the operational sectors of the Health, Safety and the Environment (HSE), to implant the concepts of safety within those shipping companies providing support services to Petrobras. The application of these concepts on support vessels has required some adjustment, primarily in the classification of accidents." ]

[ "A594" ]

[ "Petrobras, as the largest operator in ultra-deep waters in South America, has been using a field development concept that has proved to be winner since 2010. This concept is well suited for fields with high productivity wells, which produce more than 20,000 barrels of oil per day. In the market, this concept is known as “satellite wells”. In this scenario, Petrobras has benefited from its strategy of standardizing subsea equipment, including Wet Christmas Trees (WCT), Flexible Pipes, Umbilicals and Subsea Manifolds. However, since the downturn of 2014, Petrobras has been struggling to simplify its own specifications, looking for the most attractive CAPEX solutions in the market, allowing suppliers to use their own knowledge and experiences to propose low cost solutions, meeting projects requirements. From 2015 onwards, Petrobras has been working with the suppliers, with the Early Engagement initiative, aiming that the integration synergies, existing assets and the experience of these suppliers, could bring to the projects, the benefits of CAPEX reduction, and allowing the advancement and approval of these projects internally in the company. Technological development programs to allow the use of flexible pipes that are resistant to contaminants such as CO2 and H2S, new CRA materials to be applied to rigid flowlines and low-cost riser configurations, have been pursued by Petrobras in order to enable the implementation of ultra-deep water projects.", "PETROBRÁS’s exploration and production operations in Campos Basin, is the biggest offshore activity supported by helicopter in the Brazilizan coast. With the increment of the activities, the number of platform, rigs and drilling ships are increasing and it is necessary a great number of helicopters to accomodate all passengers. Quality and safety are the most important aspects of this mean of transportation and PETROBRÁS works hard to maintain them. To obtain the expected results PETROBRÁS has: ·Safety flight policy: ·Periodical meetings among PETROBRÁS and Flight Companies; ·Regular inspections in all aircrafts; ·Database containing all informations concerning flight safety; ·Daily analysis of each anomalous situation. This paper has the objective to show some data and information about offshore activity in Campos Basin and PETROBRÁS flight safety policy.", "Faced with the latest experiences on Brazilian oil spill incidents, Petrobras has been trying to overcome many challenges in environmental management and operational safety, aiming to prevent environmental risks. This paper presents the oil characterizations and monitoring studies in affected ecosystems such as the hot spots on soils affected by the Iguassu River oil spill (occurred in July 2000, due to a pipeline rupture in the scraper area of REPAR, a Petrobras refinery located in the state of Parana), by the Vessel Vergina II oil spill in São Sebastião channel (located in the state of São Paulo, occurred in November 2000) and lastly, the Guanabara Bay oil spill (a pipeline rupture that occurred in January 2000, due to a pipeline rupture between oil terminal and REDUC, a Petrobras refinery located in the state of Rio de Janeiro). Chemical analysis were performed in different sample matrixes including many parameters such as total petroleum hydrocarbons (TPH), aliphatic compounds (n-alkanes), unresolved complex mixtures (UCM), benzene, toluene, ethylbenzene and xylenes (BTEX), polycyclic aromatic hydrocarbons (PAH), terpanes and steranes, that are the parameters usually monitored after a spill oil. Visual inspections were also performed mainly in Guanabara Bay in order to identify the affected ecosystems by the spilled oil and to plot maps of classified regions based on the level of visual oil contamination. The acute toxicity was evaluated in water soluble fraction (WSF) of the spilled oils using ecotoxicological tests.", "Petrobras' Barracuda and Caratinga Project consists in an offshore deep-water oil fields production development, located at the Campos Basin, in Rio de Janeiro, Brazil, for which Petrobras is the concessionaire. The fields cover an area of 493 square kilometers at water depths of 600 to 1,100 meters for Barracuda and 850 to 1,350 meters for Caratinga, with reserves of approximately 1,1 billion oil barrels and 12,5 billion cubic meters of gas. The Project is being developed through a major turnkey EPC (Engineering, Procurement and Construction) Contract of over US$ 2.6 billion, signed on July, 2000, with KBR (Kellogg Brown & Root), the Engineering and Construction Company of the Halliburton Group, making Barracuda and Caratinga one of the largest offshore development projects in the upstream segment. The EPC Contract Scope of Work consists of the conversion of two VLCC vessels into Floating Production Storage and Offloading units (the P-43 and P-48 FPSOs) capable of processing 150,000 barrels of oil per day each, drilling and completion of fifty four wells and the development of all associated subsea system. As a result of the magnitude of the Contract, a complex financial structure was designed and a Special Purpose Company (SPC) was created to enable an off-balance and off-budget execution, through the establishment of a Project Finance. Petrobras, as Owner Representative, is responsible for the management and acceptance of the work accomplished through the EPC Contract, as well as, for the future operation of the production facilities, on behalf of the SPC. This paper aims at presenting an overview of the Project, along with the major challenges experienced, the means found to overcome them and the resulting contributions for the offshore energy industry.", "In 2004, after a cycle of 11 yr in which the annual increase in crude oil production was 8.6% avg, the production decreased 3%, according to Petrobras. In 2003, the production was 1.54 million bpd avg. The decline in production was due to delays in construction and the arrival of two Floating Production Storage Offloading vessels, the P-43 and P-48. The P-43 began to process crude oil on 12/22/2004. When the P-48 enters service, Petrobras will be able to increase its production of crude oil by 500,000 bpd. The P-43 is stationed in the Barracuda field, bay of Campos, offshore the state of Rio de Janeiro, in 800 m of water. Initial oil yield is 10,380 bpd of 25° gravity. Platform P-48, the twin of P-43, is part of the Barracuda-Caratinga project that will increase Petrobras crude oil production by 300,000 bpd. This platform will enter service in January 2005. With the new capacity, the production of crude oil by Petrobras is expected to reach 1.9 million bpd by the end of 2005. Other floating installations will contribute as well when they enter service, the P-50 and P-34. Petrobras is to invest $26,200 million until 2010 for E&P. Between 2005 and 2008, 17 installations will enter service allowing annual increases of 5.9% in production of crude oil and NGL, achieving self sufficiency in 2006. Petrobras has invested heavily in improved recovery that in the last 10 yr in the Marlim oilfield has yielded an additional increment of 3000 million bbl of crude oil. In November 2004 Petrobras gave a $47 million contract to the Western Geco company to make a three dimensional seismic study of the Marlim basin to identify reserves there. Discovery of an additional 290 million bbl of crude oil in Marlim is expected. On dry land, improved recovery enabled an increment of 200,000 bpd in production from the fields in the states of Bahia, Rio Grande do Norte, and Sergipe in 2004. In 2006-2007, the company expects to substitute for imports of light crude oil its own production to start in the oilfield offshore the state of Espírito Santo. This is lighter crude oil than that from the bay of Campos where the company now obtains 80% of its oil production. The Brazilian oilfields produce mainly heavy crude oil that has to be mixed with lighter imported crude oil to produce quality gasoline. However, Brazil increases its exports of heavy crude oil. The company is involved in new areas of exploration. They are discussed. The Brazilian Petroleum Authority, Agencia Nacional de Petroleo, will likely hold the 7th hydrocarbon licensing round for concessions in crude oil E&P in October 2005.", "Petrobras has been successfully dealing with deep water floating production systems using flexible pipes since 1977. During the completion of Marlim South 3 well in 1977, Petrobras was surprised by the occurrence of two birdcage type failures. At that time, Marlim South 3, in a water depth of 1709 m was the deepest offshore production well in operation. Since then. Petrobras has been testing flexible pipes using a field test known as DIP test. In a DIP test, an empty end capped sample of a flexible pipe, about 150m long, is partially-supported by the sea bottom and connected to a lay vessel by a pipe follower or a wire rope. The flexible pipe has to withstand a 4 hour period of cyclic bending due to the motions of the lay vessel. The DIP test has provided Petrobras with information on a new failure mode: lateral buckling in the armor wire. Although a birdcage failure is equally undesirable, lateral buckling of the armor wires implies more danger because it can go unnoticed. In 2001, a research project was set up by the Research and Development Center of Petrobras that was aimed at reproducing the flexible pipe failure modes under laboratory conditions. The purpose was to obtain a better understanding of the failure process, as well as to develop testing alternatives to avoid the significant costs related to DIP tests. In order to assess the effect of cyclic bending as a major factor in degrading the longitudinal compressive strength of flexible pipes 15 destructive tests were performed on 4-inch diameter flexible pipe samples. Two test rigs that accommodated three types of test and a number of test procedures were developed in the project. The number of bending cycles to failure for each sample was determined when subjected to compressive action corresponding to its operational depth. Tests to evaluate the effect of pre-existing damage were also conducted. Special attention was devoted to the effect of layer arrangement on compressive failure. The test results clearly identified the basic failure modes under investigation (i. e. birdcaging and lateral buckling of the armor wires). Suggestions regarding simplified testing procedures and corresponding performance criteria are also presented.", "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan.", "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030.", "Brazil has suffered water contamination caused by oil spills, which has caused both short-and long-Term environmental damages. Human error and mechanical problems in offshore equipment during the production, transportation and storage of petroleum constitute the main causes of oil spill. Due to this fact and to emphasize Petrobras' commitment in maintaining and preserving the environment, the company developed strategies and ways to prevent oil spills, as well as methods for controlling them. The result was the construction of Petrobras' Operations Center, which was considered by the president of the company to be an ambitious, innovative and transformative system that enabled Petrobras to make better informed and more efficient operational decisions. This paper aims to share a practical experience on how ICT technologies and digital governance can help both public and private companies to maximize efficiency and profitability in a sustainable way by creating public value and environment-friendly policies.", "Oil offshore Brazil, as well as in other continents, has demanded floating units for oil production. Typical anchored production units are the semi-submersible platforms, FPSO, Spar Buoys and TLPs. All of them use several anchoring lines for station keeping. In the offshore Brazil scenario, the last twelve years the FPSOs adopts the torpedo piles and polyester ropes in the anchoring lines in deep and ultra-deep waters. The FPSO “Cidade de Angra dos Reis” was the first to operate in pre-salt area in October 2010. From then on, it became common the production units with VLCC size, oil production of 150,000 barrels per day and 24 anchoring lines. The reason for such large number of anchors is the 1,200 tonnes torpedo piles holding power restriction. The proposition developed in this paper reduces the number of anchor lines using well know offshore equipment such as: driven piles, mooring chains, polyester ropes and conventional anchoring deck equipment. The main difference is the use of driven piles with holding power above 1,800 tonnes and anchor lines with a breaking strength of more than 2,000 tonnes. It is shown that a decrease of number of anchoring lines from 24 to 12 can be achieved. Consequently, it will decrease also the space occupied by the anchoring lines in the seabed by reducing the subsea layout of risers, flow lines and well head. This allows a technical and economical scenario more feasible when compared with the currently used on the Brazilian oil & gas market." ]

[ "This article discusses the development of several mega projects for the development of the Pre-Salt fields, in the Santos Basin, deepwater, offshore Brazil. Special focus is given to the Lula Field, a super giant field, operated by Petrobras, having BG Brasil and Petrogal Brasil as partners. Discovered in 2006 and with an estimated potential recoverable volume up to 8.3 billion barrels of oil equivalent (boe), Lula field placed pre-salt fields in the spotlight as it opened a new prospective frontier in Brazilian deep waters. To develop Lula field, a multi-module development project, it was adopted a fast track strategy to achieve material production levels in a very short time frame. In such a massive capital expenditure program, in an area with no infrastructure, and in an environment of heterogeneous carbonate reservoir, risk mitigation actions are a must. The first step taken was to acquire static and dynamic reservoir data, through data acquisition wells, extended well tests and implementation of two pilot FPSOs. Also, flexibility in the projects was carefully evaluated aiming to comply with possible bad, and good, reservoir surprises. This information was used to optimize the development plan of Lula field, which comprises 10 FPSOs with processing capacity ranging from 100k bpd to 150k bpd of oil, and 175 million cubic feet/day to 280 million cubic feet/day of gas. The two pilot production units started operation in 2010 and 2013, respectively, and the first module of Iracema area in Lula Field started production in October 2014. The following FPSOs are expected to be installed in the upcoming years. In a scenario of simultaneous projects under implementation, a clear long lead items strategy is critical to ensure the planned fast-track pace. Also, standardization of subsea equipment and production platforms, in an increasing local content requirement, mitigates supply chain risks and allows resources allocation flexibility. This paper details the key success factors of Lula field development strategy, and show why it is nowadays a reference for the following mega developments that will take place in the Brazilian pre-salt, by combining a risk mitigation strategy with a fast pace production ramp-up, anticipating cash flow funds and maximizing returns." ]

[ "A1852" ]

[ "The consortium operating Block BMS11 offshore Brazil has opened the 10 million cu m/day LulaMexilhao natural gas pipeline. The consortium is comprised of operator Petroleo Brasileiro SA 65%, BG Group 25%, and Petrogal Brasil SAGalp Energia 10%. The system connects the presalt Lula field to the Mexilhao platform in the Santos basin's shallow waters. The 18-in. OD LulaMexilhao pipeline, operating at 250 bar, extends 216 km, starting 2145 m below sea level at the Cidade de Angra dos Reis floating production, storage, and offloading vessel, and ending at the Mexilhao platform, at a depth of 172 m. Mexilhao is the largest fixed production unit in Brazil and the new pipeline as the deepest and longest undersea pipeline ever laid in Brazil. The new pipeline will also transport natural gas from other fields developed as part of Phase 1 of Santos basin presalt operations, with connections to the FPSO developing each, two in the Tupi field, one in Guara.", "As the operator of several exploratory blocks in ultradeep waters, Petrobras was responsible for many presalt oil discoveries in Santos Basin such as Tupi, Carioca, Guará, and Iara. In partnership with the National Petroleum, Natural Gas and Biofuels Agency (ANP), Petrobras drilled well 2-ANP-2A, which resulted in the Libra discovery. In 2013, Libra was offered in the first bidding round executed by the Brazilian government under the new Production Sharing Contract for presalt areas. The winning consortium is comprised of Petrobras (operator), Shell, Total, CNOOC (China National Offshore Oil Corporation), CNPC (China National Petroleum Corporation), and PPSA (Pré-Sal Petróleo S.A.). The Libra discovery is sitting over a structural trap of about 550 km2 (212 mi2) closure at the Aptian top reservoirs level presenting a maximum oil column that can reach up to 900 m (2953 ft). The main reservoirs are lacustrine carbonates, deposited from the Neobarremian until the Aptian. Preliminary estimates indicate a volume of oil in place between 8 and 12 billion BOE. The development proposed for Libra started with Phase 0, in 2014, and is focused on information gathering, including appraisal wells, extended well tests (EWT), early production systems (EPS), and a pilot project. Phase 1 encompasses the definitive production systems and is expected to start in 2022 and finish in 2030.", "Marginal Oilfields are refered to as those oilfields that are hardly developed efficiently with current technical and ecomonical conditions, characterized as high costs of development and low profit margins. However, under certain economical and technical circumstances, marginal oilfields may be transferred to be conventional ones. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin. CNPC signed a cooperation contract with Petrobras in 2013, taking 10% of the total shares. How to efficiently develop the oilfield has been a challenging issue. Technologies of smart water injection in Shengli Oilfield have been studied, while the field development and environment (deep water) of Libra Oilfield have been analyzed, in order that the smart water injection technologies may be modified to develop the marginal oilfield more efficiently. Different from conventional zonal water injection technologies, the remote wireless control water injection technologies take advantages of packers that are connected with each other via preset cables, which achieves downhole testing and water injection simultaneously. Being run via tubing, the water injection string locates a nozzle for each reservoir that is isolated by a packer. All nozzles are connected with packers via the preset cables that work as power lines for the whole string, so that downhole data such as pressures, flows and temperatures are all transferred to the processing computer on the surface. The computer program is used to convert pressure and formation signals into curves that are transferred to Company via WIFI or mobile 2G/3G/4G webs, in order that technicians there may understand and learn about downhole pressures, temperatures, flows and nozzle conditions in real time. They are able to open and close the nozzles totally or partially by giving orders that are transferred as signals via cables. In order to cope with offshore environment of Libra Oilfield in Santos Basin, pre-set cable packers have been modified accordingly, so that highly deviated wells may be developed with the smart water injection technologies. A field trial deployed in BM-C-33 Block Libra Oilfield shows that the modified smart water injection technologies are feasible for Libra Oilfield, as a novel solution to inject water in highly-deviated and horizontal wells in offshore oilfields.", "The Petroleo Brasileiro SA (Petrobras), a state-owned oil company utilizes its floating production storage and offloading (FPSO) P-50 vessel to 16 production wells at the Albacora Leste field in Campos basin. FPSO symbolizes Brazil's plans to reach oil self-sufficiency by mid-2006. The FPSO will process oil pumped from the field 150 km off Rio de Janeiro and each peak production of 180,000 b/d by August, which represents around 10% of Brazil's crude oil output. The P-50 will also be able to handle 6M cu m/day of natural gas. The P-50 and P-34, also an FPSO, are to begin processing 20,000 b/d of oil at Jubarte field. They will raise national production to 1.9M b/d in 2006, surpassing domestic needs and making Brazil reach oil self-sufficiency.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels.", "Atlanta is a post-salt oil field located offshore Brazil in the Santos Basin, 150 km southeast of Rio de Janeiro. The combination of ultra-deep water (1550m), heavy and viscous oil (14 API), unconsolidated sandstones, low overburden (800m), faulted reservoir rock, etc., composes a unique and challenging scenario for which the remarkable solutions applied have been already detailed (Marsili et al. 2015; Pedroso et al. 2017; Monteiro et al. 2015; Pedroso et al. 2015; Rausis et al. 2015; Pedroso et al. 2015). The Atlanta field project was planned to be developed in two phases: the Early Production System (EPS) with three production wells, and the Definitive Production System (DPS) with up to nine wells. No injection wells have been planned. In 2013 and 2014 the first two wells, here called ATL-2 and ATL-3 (ATL-1 was a pilot well), were successfully drilled, completed, and tested as described in the above references. In May 2018, they started production. After almost one year and 5,000,000 bbl of produced oil, the third EPS well was constructed. The lessons learned in each phase of the well construction - drilling, lower completion, and upper completion - were applied in the third well, repeating the good operational performance. An analysis of this comparative performance is presented. Technology improvements were implemented, such as the use of autonomous inflow control devices (AICD), the use of micro-tortuosity logging to better position the electrical submersible pump (ESP), the use of an annulus diverter valve (ADV) to avoid the pressure drop across the ESP in case of failure, etc. The result was a well constructed ahead the planned time with a Productivity Index (PI) that exceeded expectations.", "On November, 2010 Petrobras defined the necessity of one additional gas export pipeline in Santos Basin Pre-Salt area to improve the capacity of the export gas network and assure the objectives defined in the Strategic Plan. Nowadays there are two gas export pipelines in operation to export the gas from pre-salt area: Rota 1 connecting Lula Sul field to onshore facilities in Caraguatatuba/SP and Rota 2 connecting Lula Área de Iracema Sul to onshore facilities in Cabiunas/RJ. The new 20-in and 24-in gas export pipeline named Rota 3 is approximately 307km long and connects Lula Norte field in Santos Basin to Jaconé Beach/Maricâ It has 15 spare hubs and 3 PLEMs for future connections to Sépia, Berbigão, Atapu, Sururu, Buzios and Libra fields. Also, Rota 3 is interconnected to export gas pipeline Rota 2 in a loop to permit gas exportation through Maricá and Cabiúnas. This paper addresses the pipeline design optimizations based on standard DNV-0S-F101 and on several consulting to national and international pipe suppliers. Full scale qualifications tests were performed in accordance with DNV-0S-F101 to permit the use of the alfafab factor identical to one for the supplied 20-in UOE pipes. All qualification process was witnessed by DNV. Additional simplifications were introduced aiming to costs reduction and in order to improve attractiveness of EPCI (Engineering, Procurement, Construction and Installation) contract. Installation contractors were invited to suggest simplifications to the project. Lessons learned during the design, BID process and installation phase of the project are also envisaged.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top.", "In the presence of the President of the Republic, Luiz Inácio Lula da Silva, the BrasFels S/A shipyard launched to the sea the $(US)1 billion P-51, the first semi-submersible platform built entirely in Brazil. Ordered by Petrobras, the unit is programmed to operate in the Marlim Sul field, Campos basin, state of Rio de Janeiro with 75% of the goods and services applied to the construction provided by Brazilian companies. In 2010, the P-51 will reach its maximum operating capacity of 180,000 bpd of petroleum and 6 million cu m/day of gas. The P-51 will provide about 8% of the national petroleum production. The P-51 will be strategic with respect to increasing the supply of gas to Brazil under Plangás (Plano de Antecipação da Produçäo de Gás Natural). The P-51 is also part of the PDET (Plano Diretor de Escoamento e Tratamento) of the Cuenca basin. Of the 6 million cu m/day of gas produced, a part will be for internal consumption in the P-51 such as fuel to generate electricity and the rest will be sent to dry land. Brazil wants a naval construction base that will supply the needs of Brazil and the entire world. The P-51 will be anchored in the Marlim Sul field of 1,255 m depth 150 km offshore and will be connected to 19 wells (10 producing oil and gas and 9 injecting water) and will produce 22° API. The 9 water injection wells will inject 282,000 bpd of water. Energy use will be 100 Mw, enough energy to light a city of 300,000 persons. The patroness of the P-51 platform was the First Lady of Brazil, Marisa Letícia Lula da Silva." ]

[ "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted." ]

[ "A938" ]

[ "Atlanta is a post-salt oil field located offshore Brazil in the Santos Basin, 185 km southeast of Rio de Janeiro. The combination of ultra-deepwater (1,550 m) and heavy and viscous oil (14° API and 228 cP at reservoir conditions) composes a unique challenging scenario for Electrical Submersible Pump (ESP) application. The paper discusses the performance of the ESP system utilizing field data and software simulations. The in-well ESP is the main production method and mudline ESP boosting is the backup one. Both concepts proved to be effective artificial lift solutions for the harsh flowing conditions. The in-well ESP is installed inside a capsule in a close to horizontal slant section of around 70 m. The mudline ESP boosting is readily available to become the main production method in case the in-well ESP fails. This paper discusses the challenges and solutions that proved to be successful after more than 18 months of continuous production. Software simulations and continuous production monitoring were key factors for system modeling and optimization. One of the most powerful ESPs installed inside a well worldwide to produce heavy and viscous oil from an unconsolidated reservoir represents a step forward in ultra-deepwater production system boundaries. The concept of having the mudline system as backup is also an innovative step for the offshore oil and gas industry. Two production periods are presented with very distinct and unusual characteristics: (i) one producing 12,500 bpd of a high viscous, high Gas Void Fraction (GVF), low inlet pressure and temperature crude through two mudline ESP boosting systems and (ii) another one producing 30,000 bpd through three inwell ESPs.", "As offshore oil fields are being developed towards deeper and deeper waters, new technologies are required to curb capital expenditures. In Brazil, where oil consumption is increasing and huge oil fields lie in high water depths, the issue is particularly pressing. Earlier and higher oil production from those oil fields could be attained by the use of Electrical Submersible Pumps (ESP), so far restricted to dry completions. Also longer distances from well to platform would be made practical. For the initial phase of this development, Petrobras worked together with Tronic, Reda, Pirelli, Lasalle, Sade-Vigesa and Cooper. As a result, first-in-the-world ESP installation in a subsea well has been successfully achieved on October/1994 in RJS-221, located at Carapeba Field, Campos Basin, Brazil.", "In the early years of the offshore industry, Early Production Systems or EPSs were extensively utilized to develop marginal and/or complex reservoirs in progressively deeper and more remote waters. Their signature attributes were low capital and operating costs, simple designs and accelerated schedules to first oil. Today, Operators are emphasizing capital efficiency, design simplicity, compressed discovery to first oil cycle times and de-risking subsurface uncertainty as deepwater projects compete for capital allocation with onshore shale projects. Discussing history and applications, the authors show, how an EPS can enable an Operator to sanction developments of marginal reservoirs, mid-size reservoirs with expansion capabilities to capture reservoir upsides and phased developments of giant reservoirs. This paper addresses major subsurface uncertainties impacting development decisions and strategies to gather relevant dynamic information to mitigate risk. It provides a brief history of EPSs deployed in the North Sea, Brazil and GoM including a database of EPS platforms based on an extensive literature review. A case history in each region to demonstrate the utility of an EPS to derisk and enable commercial production of marginal, mid-size and large fields. A discussion is presented for EPS platform selection based on the research of platforms deployed in the three major deepwater regions. This discussion will facilitate to develop a roadmap for the Operators and Development Planners with tools to rapidly deselect or retain options in the early development planning stage while there is a high degree of reservoir uncertainty and pressure to compress cycle time to first oil following a discovery.", "The Santos Basin Pre-Salt Cluster (SBPSC), Offshore Southeast Brazil, is a unique scenario, posing great development challenges. The microbial carbonate reservoir is unusual regarding its origin and petrophysical properties; the fluids have a variable CO2 content; the few analogue reservoirs around the world do not compare in terms of volumes, water depth and distance to the coast; and there are also flow assurance issues. Considering the importance of these reserves for the Brazilian economy and the opportunity to accelerate cash flow, Petrobras and its partners have opted for a fast track development, including extended well tests (EWTs) and production pilots. The current Petrobras Business Plan (2011-15) foresees mat the SBPSC areas alone will produce over 500,000 boe/d in 2015 and over 1,100,000 boe/d in 2020. These numbers refer only to Petrobras share and do not include me transfer of rights with economic compensation from the Brazilian government to Petrobras. Therefore, the initial development phase will have to cope with several uncertainties, mainly the subsurface ones. Some of the most relevant are the quality and the heterogeneity degree of each reservoir zone; the compositional grading of the fluids; the performance of different EOR methods; and the presence of fractures affecting the flow. How to specify and anticipate the acquisition of expensive equipment, such as FPSOs and subsea devices, with uncertainties to be clarified? When is it worth to invest in more data acquisition, such as EWTs, core and fluid sampling, extensive lab analysis or even more appraisal wells? The timing and the uncertainty reduction foreseen for each initiative must be taken into account. On the other hand, when is it better to pay for extra flexibilities, accepting the inevitable CAPEX increase? Some examples would be: smart completions and possibility to inject different chemical products in the wells; gas and water separated lines for each satellite injector; flexible subsea layout, allowing multiples strategies and the addition of more wells; FPSO plants designed to inject desulphated water, or to export, import or reinject me gas, and also to separate variable CO2 contents in the produced fluids. This paper aims to discuss the influence of the main subsurface uncertainties in the selection of alternatives to develop the giant fields in the SBPSC, in a fast track way.", "The Papa Terra oil field is located on the BC-20 Block in the Campos Basin - Brazil (110 kilometers away from Rio de Janeiro state coast) in a water depth of 1,200 meters. The field is operated by Petrobras having Chevron as non-operator partner. Papa Terra has a crude oil with an API index between 14 and 17 degrees. The field is among one of the most complex subsea developments ever executed in Brazil with its first oil performed in 2013 and the production subsea facilities installation completed in 2014. The proposed design for the subsea production system was the use of an Electrically Trace Heated Integrated Production Bundle (ETH-IPB), the 3rd generation of this field proven technology, which was successfully designed, manufactured and installed by Technip on previous West African projects. A total of 27 km of ETH-IPB riser and flowline as well as its own electrical and monitoring module have been designed, manufactured, installed and successfully commissioned for the Papa Terra project. The core of the ETH-IPB is a 6 ID flexible pipe dedicated to production fluid. Around the core, the following components are distributed into a bundle layer: Heat tracing cables designed to provide active heating of the production fluid during warm up or after a shut-down. A Distributed Temperature Sensor (DTS) fiber optic system, deployed offshore into a stainless steel tube loop in order to provide temperature monitoring along the length of the riser and flowline system. Spacers, designed to protect the electrical cables and fiber optic tubes from mechanical loadings during installation and manufacturing. The main aim of this paper is to describe the design of this production system, that was used for the first time in Brazil and which present a lot of innovations in several domains, due to overall length, thermal requirements, heating control and riser to flowline electrical connection on the seabed. Some results of the qualification program will be presented, in particular mechanical, bundle components, fatigue and thermal performance tests. Finally, results of the field performance tests and operational feedback by Petrobras will be presented and discussed.", "A discussion covers the South American activities of about a dozen companies in brief. Enventure Global Technology has installed the first solid expansible tubular system (SET) in a well in Campeche sound for Pemex. Enventure Global Technology and Halliburton Energy Services have installed a 270 ft 4.5 in. FlexClad system to insulate drilling a well. The FlexClad system adapts SET technology to high temperature and pressure. Petrobank Energy & Resources of Canada has entered into agreements with the state owned petroleum companies in Brazil and Colombia that use its exclusive technology to evaluate heavy crude oils. THAI technology drills an air injection well in combination with a horizontal well to recover heavy oil. Empresa Columbiana de Petróleos and Petróleo Brasileiro SA evaluate the technology. Petrobank expects to initiate negotiations with Petróleos de Venezuela SA and Petroecuador for use of this evaluation technology. Petrobras Energía, the Argentine subsidiary of Petrobras, has completed a $78 million order of 297 km of piping from the manufacturer TenarisConfab. Part of the piping was supplied by the Argentine manufacturer Siat. TenarisConfab is the subsidiary of Tenaris of Italy, a leading world supplier of piping. Sevan Marine do Brasil Ltda has received a letter of intention from Petrobras for a contract relating to its FPSO SSP 300 Piranema being installed in the Piranema oilfield off the north coast of Brazil. The facilities are built at the Yantai Raffles shipyard in China. The $399 million contract is to run for 11 yr. The FPSO will be able to process 30,000 bpd of crude oil, inject 3.6 million cu m/day of natural gas, and store 300,000 bbl of crude oil. Sevan Marine is a subsidiary of Sevan Marine ASA of Norway-Etesco Construção e Comércio Ltda will have 25% interest in the installations. Saab Transponder Tech has installed aerial security R4A in 17 helicopters that Aeroservicios Especializados (Asesa) operates for Pemex in petroleum field work in the Bay of Campeche. Mitsubishi Corp and Marubeni Corp have formed a joint company to transport crude oil from the Bay of Campos to Brazilian refineries. The company, PDET Offshore SA, will build a marine terminal to receive offloading tankers to handle up to 630,000 bpd of crude oil. JGC Corp will provide managerial services. The project will require $900 million in loans. Drillers Technology de México, a joint company of Drillers Technology Corp and Dowell Schlumberger, has initiated work relating to drilling at least 265 wells in the Burgos gas field. The Brazilian Petroenge Petróleo Engenharia Ltda with headquarters in Macaé, has contracted to provide Petrobras with repairs, maintenance, and equipment testing relating to cargo activity.", "We describe the design, implementation, and performance of a fully automated Santos Operational Forecasting System (SOFS), built to monitor and predict short-term (< 3 days) sea surface elevations, currents, temperature, and salinity in the Santos-Sao Vicente-Bertioga Estuarine System (SSVBES). The SSVBES located at 24.0?S, 46.3?W is a complex estuarine system with many interconnected channels and two connections with the open sea. The system is prone to storm tides that bring coastal flooding to and interrupt ship traffic through Santos Port. The SOFS hydrodynamic module is based on the Princeton Ocean Model (POM) version POM-rain. The SSVBES model grid is forced by tides, winds, and river runoff and is nested into a coarse-resolution South Brazil Bight (SBB) grid. The SBB grid is forced by winds, density gradients, and the Brazil Current flowing offshore. Within SSVBES, SOFS works in parallel with three real-time observation stations. The model performance was tested against observed data with a best Willmott skill of 0.97 and root mean square error (RMSE) of 13.0 cm for tidal sea level (15.9% of the mean tidal range). For tidal currents, the best skill and RMSE were above 0.99 and 3.9 cm/s (4.3% of the mean tidal current range), respectively. The coupled system was able to simulate seven storm tides with average skill of 0.95 and average RMSE of 17.0 cm. The good agreement with observed data shows the potential use of the designed system to protect both human life and assets.", "The Parque das Conchas (BC10) field offshore Brazil, operated by Shell and owned together with ONGC and QPI, has challenging reservoir conditions. Several subsea fields with viscosities ranging from 1 to 900 cP and gas volume fractions between 5% and 70% require subsea boosting to lift production fluids to the FPSO facility. Since first oil in 2009, a unique method of subsea separation and boosting has been deployed on BC-10, utilizing vertical caisson separators with Electrical Submersible Pumps (ESP's) to pump well fluids from up to 2000m water depth to the FPSO facility. Maintenance of the ESP assemblies requires an intervention using a MODU (Mobile Offshore Drilling Unit). Shell pursued an alternative subsea boosting solution using Mudline Pump (MLP) technology, with the objective to reduce field Opex and increase redundancy. The MLP was conceived as a retrofit module, which was to be fully compatible with the existing infrastructure. This includes using existing variable frequency drives, high voltage umbilicals, subsea mechanical interfaces, controls, hydraulics, and chemical injection. Despite the prior development of a 3 MW (megawatt) MudLine Pump (MK1), the specifics of the BC10 application required further development and qualification. The design pressure was increased from 5,000 psi to 7,500 psi, which required requalification of motor and barrier fluid circuit components. Additionally, the challenging multiphase flow conditions led to the development of an innovative control strategy to maximise the production window, whilst ensuring safe operating conditions for the pump within the existing system constraints.", "The high CO2 content found in Pre-Salt offshore oil fields has led to cost-energetically processes for CO2 removal and destination. In this paper, an innovative and promising alternative subsea separation process (SSP), proposed by Petrobras, was analyzed. Since a CO2 rich phase is expected at reservoir conditions, subsea gravity separators can be employed avoiding large volumes of CO2 from being sent to the topside, lowering gas processing plant complexity. A differential-algebraic system of equations (DAE) was developed for the SSP modeling. Design and steady-state simulations were carried out within EMSO simulator. To ensure the process variables remain at their desirable values two control strategies, PID and Linear Model Predictive Control (MPC), were compared. The proposed process showed technical feasibility with up to 62% GOR reduction. The control strategies presented reasonable performance. MPC had for most of the controlled variables a better performance.", "Acoustic monitoring in oceans has grown greatly for several purposes. To meet the needs of an acoustic monitoring program of Petrobras, a Brazilian oil exploration company, an acoustic recorder was developed, called SAASS, an autonomous system for the acquisition of submarine signals. This development had as main goal, the development period and its cost, besides of course, technical requirements for that application. This work has become a very promising experience since it also allowed researches in the area of hydrophone development and acoustic signal analysis methodology. This article will describe the most relevant aspects of the development of SAASS and main strategies adopted to achieve the established objectives of Petrobras program." ]

[ "There are several oil fields offshore Brazil with horizontal oil density variations. API tracking, that is available in some commercial finite difference simulators, can deal with such cases by allowing definition of an initial oil gravity distribution and tracking variations of oil density, due to the movement of oil. Streamline-based simulators can be much faster than conventional finite difference simulators when applied to large and heterogeneous models. However, this approach is most accurate and efficient when it is assumed that the rock and fluids are incompressible. In previous work (Beraldo et al, 2007), an incompressible formulation for streamline simulation with an API Tracking option using two components in the oleic phase was presented. This paper presents a compressible formulation for streamlines that also considers API tracking. It extends the work of Cheng et al. (2006) and Osako and Datta-Gupta (2007) by consistently accounting for flux of mass and volume along streamlines. It was described how mass and volume can be mapped between the underlying grid and streamlines to minimize mass balance errors and how consideration of cumulative volume in a streamline can substitute for time-of-flight (Beraldo 2008). The method was implemented in a three-dimensional two-phase streamline-based simulator. Tests based on a Brazilian oilfield model and on the SPE10th Comparative Case demonstrate that the implementation can reproduce the results of a conventional simulator, while being substantially faster for finely-resolved models, even when compressibility is significant." ]

[ "A1563" ]

[ "This paper aims to report the production management of domestic shipyards, with the inclusion of the national fleet renewal program. The study addresses how domestic production may or may not leverage its business and promote sustainable growth of the national shipbuilding industry. The largest national power generation company, Petrobras, began a program in 2008 to renew the fleet of marine support. This program included the construction of 146 offshore support vessels in Brazilian shipyards. With this, the Brazilian government promoted the revitalization of the national shipbuilding industry by introducing this segment in its Growth Acceleration Program (PAC) and decided that shipbuilding should have local content in its production.", "Brazil's government has requested the construction of 28 new offshore drilling units to be built in country by Brazilian contractors under the 'Build in Brazil Initiative'. The government awarded contracts for the first seven rigs to Brazil-based Sete, a company associated with Petrobras. Petrobras is the frontrunner for new activity as Brazil's national oil company, but Brazil has proven very receptive to allowing other oil companies into its waters. Brazil-based OGX is currently working offshore, and a number of multinational companies have been invited to participate, including Shell, BP, ExxonMobil, BG, Anadarko, and Amerada Hess. Ensco, one of the leading contractors in Brazil, has expanded fleet, which include seven ultra-deepwater drillships, 13 dynamically positioned semisubmersibles, seven moored semisubmersibles, and 48 premium jack-ups.", "BR Petrobras plans to spend $224 billion through 2014 to develop deepsea oil finds. Supplying equipment in a timely fashion will be key to its efforts to nearly double oil production in Brazil by 2020. Brazil's government wants the majority of the cash headed to local companies or local units of foreign multinationals and wants to develop the oil services sector, creating industry that could export goods and services around the world. Thus, gradually, the minimum local content requirements will increase up to 95% in 2017. Whoever wishes to have a major role in the E&P will have to establish significant local presence, in particular equipment suppliers (topsides, pipes, drilling packages, power packages for offshore units, etc.), who will likely need to build production facilities in Brazil. The issue is not only to install local manufacturing support, but also pre-sales technical support, a presence close to the shipyards and operators throughout the phase of integration, commissioning and operation, and a very strong and effective after-sale support. The paper will discuss the overall strategy needed to bring to Brazil the technical and manufacturing expertise to support the rapid growth of the shipbuilding industry and will examine the importance of providing local support to the yards and owners to reduce delays in technical proposal and during the construction phase of vessels. Honeywell has set up, in addition of its already existing operations, a Marine operation in Rio de Janeiro. This unit includes: • Front End Engineering Desing (FEED) • Customer Engineering Project Support • Technical sales support • Installation & Commissioning support. • Service Station • Local spare part inventory. Consideration will also be given to a study being run by Honeywell to implement an assembly line in Brazil to minimize logistics costs and delivery times.", "This case focuses on the challenges regarding capacity building required to meet the huge increase of manpower demand by the offshore and shipbuilding sectors in Brazil and Rio Grande do Sul state. This arises from four key factors: end of monopoly of exploration and production of oil and gas in 1997, expanding the Brazilian offshore market; the Local Content policy adopted since 1999; national programs to stimulate the maritime industry such as the Fleet Modernization and Expansion Program created in 2004 to renew the fleet of Transpetro, a Petrobras subsidiary; and the expansion of Petrobras investments, partly due to the discovery of giant oil reserves in the Pre-salt layer in Brazil, in 2006. Since 2010, annual investments from Petrobras have reached US$ 40 billion/year, more than ten times the yearly investment in the 1997-2001 period. Consequently, offshore clusters have been developed in the country to build platforms, drilling ships and supply vessels, demanding massive training. In Rio Grande do Sul, three big shipyards and modules producers have installed. In this context, government created in 2003 the National Oil and Natural Gas Industry Mobilization Program (Prominp) and the National Plan of Professional Qualification (Pnqp) in 2006. Until 2013, circa US$ 120 million were invested to train nearly 100.000 people in 185 trades at several levels. In the state, training has been provided mainly by SENAI-RS, the state branch of the National Service of Industrial Apprenticeship, linked to the Federation of the Industries of Rio Grande do Sul. The large-scale actions undertaken for training have not been efficacious enough to meet the needs. Studies and discussions have raised factors that impact on shipyards' productivity and competitiveness. We consider alternatives to develop talents to accelerate the learning curve, anchored in the following axes: SENAI methodology for professional training; pre-selection of people according to specific abilities; the concept of a \"Living Lab\" training environment; familiarizing workers with productiveness indicators; efficient management paradigm; workers training aligned with the project repeatability principle. The local industry must be internationally competitive when the local content policy ends and labour productivity plays a crucial role in this aspect.", "The establishment of policies relevant to the oceanic area in Brazil aims to guide the rational planning of resources of marine space (Blue Amazon), ensuring the quality of coastal population life and the effective protection of ecosystems and resources within it. Therefore, it appears as a major factor in the formalization of coastal and marine policies and, especially, in the training of human resources to work in the area. The concern of political regulation of the Brazilian government with the use of marine resources and coastal areas emerged in the 1970s, parallel to the emergence of an environmental viewpoint in state planning held in the country. The Special Department of Environment of the Presidency was created in 1973, which was a significant milestone in its institutional history. A year later, the Inter-Ministerial Commission of Sea Resources was created, aimed at coordinating issues that would lead to a national policy for the coastal region of Brazil. However, only with the Constitution of the Federative Republic of Brazil ratified in 1988, and with the ratification of the country to the United Nations Convention on the Law of the Sea in 1994, did the legal issues related to marine environment areas take form and effect.", "In 2018, Brazil announced the designation of two new Large Scale Marine Protected Areas (LSMPAs), resulting in an increase in protection from 1.5% to 26.36% of the country’s maritime territory. We employ an agenda-setting theory to analyze the Brazilian LSMPAs as a causal case study, unpacking the factors that led to their creation, and providing insights about the process of reaching global targets. Drawing on a detailed literature analysis and interviews with key stakeholders, we argue that reaching an international goal is a political commitment which emerges within a ‘policy window.’ Additionally, we offer seven lessons that can improve the chances of reaching an international goal and shifting the agenda: (1) attract media attention; (2) make a formal commitment; (3) launch a movement or a campaign to attain the goal; (4) make the goals legally binding; (5) propose general international goals; (6) diffuse ideas and (7) form support groups.", "Brazil has a transport system with little presence of intermodality and use of Short-Sea Shipping. Nevertheless, these are goals for Brazilian waterborne transportation matrix, which is expected to exceed 13% going to 25% in 2025. Currently, Brazilian transportation matrix isn't balanced surpassing that of other countries in the use of the highway, where approximately 63% of the total cargo is transported. The aim of this paper is to make a diagnosis on the investigative potential use and improvement of Short-Sea Shipping in Brazil. To base this effect, we present a new concept of \"fast coastal terminals\", its conceptual model and potential gains in an intermodal transportation network.", "In Brazil, environmental laws define oil containment and collection as a primary strategy to oil spills originated by exploitation and production enterprises that reaches water bodies. Thus, it is foreseen a continuous equipment increase over the time, in a scaled response, always in accordance to accidental scenarios forecasted in the enterprise risk assessment. This way, minor spills, with higher probability to occur, require smaller resources, however made available in a smaller rage of time, whereas larger and less frequent spills must be attended to with strongest resources, in a larger period of time. At Brazilian maritime zones with higher exploitation and production activities the use of larger vessels, aiming to solve the worst cases, was prioritizred. Such vessels are also used to respond the small and medium discharges, which could be solved by less robust vessels. The use of smaller and fastest vessels and simpler equipment to be operated allows the fleet's rationalization and a quicker and more effective response to more frequent situations. This changing also fosters economic profits (by reducing the figures and the fees paid by vessels chartering) and environmental benefits (by reducing emissions and the fuel consumption). In order to represent this situation, this paper compares the compliance with requirements from regulatory agency using an exclusive fleet of traditional boats and a fleet of traditional boats and fast response. A case study will be presented, considering a high activity oilfield on Brazilian coast.", "Brazil is entering the age of decommissioning, with aging offshore fields that have been in operation for more than 25 years. Brazil has migrated from an operator's monopolistic environment (with the state owned oil company, Petrobras) to a new reality in which many companies, national and international operate in Brazilian waters. As part of this new reality, Brazil has established government organizations whose aim is to coordinate the exploitation of Brazil's natural resources with the intent of optimizing activities while protecting the environment in an ever increasingly complex eco-system management. Traditionally, offshore projects follow basic phases such as conceptual, front end engineering and design (FEED), detail design, construction and commissioning. Cost allocation and schedules for these phases are all associated with production estimates and return on investment estimates. In many instances, internationally, planning for decommissioning has been deferred to an unforeseen future. Finally that far off horizon has become a reality, and domestic and foreign operators in Brazil are going through a new decommissioning awareness phase. It is the author's opinion that operators wish to comply with a well-defined frame of Brazilian and international regulations. In general, this paper aims at examining the existing regulatory environment and make recommendations on a path forward for: • Clear-cut requirements so that the permitting process flows with a minimized review cycle; • A clear set of rules, defining what abandonment options exist (e.g. complete removal vs. partial removal, on-site abandonment rules for topsides and subsea infrastructure); • A clear set of rules defining fines and sanctions for environmental violations The objectives of this paper are to 1) Gather basic information on the current status of the Brazilian Rules and Regulations, 2) Help non-government entities work together to accomplish the goals set forth by Brazilian lawmakers and officials, and 3) Develop a roadmap for convergence of the environmental agency and project stakeholders. Laws, rules and regulations, and international treaties of which Brazil is signatory are part of this environment.", "This paper presents the importance of deep water scenario for Brazil, the PETROBRAS Deep and Ultra-Deep Water R&D Program (PROCAP-2000) and the candidate fields for the deployment of subsea innovative boosting technologies (ESPS - electrical submersible pump in subsea wells, SSS - subsea separation systems and SBMS - subsea multiphase flow pumping system) as well as the problems associated with the flow assurance in such conditions. The impact of those innovative systems, their technological stage and remaining demands to make them available for deployment in offshore subsea areas, mainly in giant deepwater fields, are discussed and predicted." ]

[ "Petrobras has brought online two fields, updated its files on the Tupi field and decided to dedicate its exploration efforts along its shores. The FPSO can produce 10mmcm/d of natural gas and 35,000b/d of oil and condensate and store up to 740,000 barrels of oil. The development plan for the field foresees four horizontal oil wells and five gas producer wells, which will be connected directly to the FPSO. The consortium expects to declare commerciality at Tupi in December 2010. Acergy recently won a four-year, $220-million contract for flexible lay services in water depths to 2000m offshore Brazil for Petrobras. The revised 2020 target does not include any production from the new pre-salt regulatory framework. Petrobras aims to produce 3.9 million boe/d by 2014. The lump sum Petrobras intends to invest is 20% higher than the amount set out in the previous business plan." ]

[ "A560" ]

[ "A discussion covers the new oil and natural gas discoveries by Petrobras from August 2005 to August 2008. The discovery of oil and natural gas by Petrobras in the presalt of the Santos basin, especially Tupi, has come to the attention of the global petroleum industry. Localized in reservoirs that vary from 5,300 to 7,000 m depth (including the water and marine subsoil layers) followed by a salt layer, the new exploratory frontier provides Brazil with the opportunity to become one of the countries with large reserves. The discoveries will add to the present Brazilian reserves of 14 billion bbl. From 2005 to the first half of 2008 discoveries were made in the Santos basin at five exploratory blocks. In one of them, Tupi, 5-8 billion boe were discovered. In the 1980's, Petrobras pioneered in drilling in deep waters in the Campos basin where now oil and gas are produced at 1,886 m of water depth and where technology has been developed to drill up to 3,000 m depth. Following the exploratory success in the Campos basin, exploratory attention in the basins of Santos and Espirito Santo led Petrobras to discover presalt petroleum at a cost of $(US)1 billion. Twenty wells were drilled that yielded light petroleum at 28° API and a large quantity of associated natural gas. In the Santos basin, Petrobras developed new drilling projects through 2,000 m of salt. The first well cost $(US)240 million but today such a well can be drilled for $(US)60 million. The pilot project of Tupi of Petrobras operated with BG (25%) and Galp Energia (10%) lasting until 2010 has an initial production of 100,000 bpd of petroleum and about 3.5 million cu m/day of natural gas. Since its founding, Petrobras has discovered in Brazilian reserves 25 billion bbl of petroleum and natural gas that have produced 11 billion bbl. Most of this petroleum and gas is enclosed by a salt layer with 80% in the Campos basin with mainly heavy oil.", "On December 23, 1982, only 30 days after the 18,600-ton Cherne II jacket was launched. Micoperi completed grouting in all of the 24 pile sleeves. This established a record for the Brazilian state oil company in jacket installation. The structure is located in 142-m water in Campos Basin. In establishing this record, the piles were driven to maximum penetration of 110 m. The jacket, designed by Interconsult (Micoperi), presented a new concept for steel jackets using vertical external skirt piles. The concept eliminated the need for pile guides and enabled the 160-m-long piles to be installed and driven in a single piece. This permitted fast installation in an area of the open South Atlantic subject to severe seas of long period swells almost the entire year. The concept also reduces both overall weight and fabrication time.", "Petrobras and the UK's BG Group are studying the possibility of installing floating gas-liquefaction plants at the large offshore oil and gas discoveries in the Campos basin's pre-salt areas. The proposed 14 million cu m/day LNG plant would be moored 300 km offshore and would collect gas from various fields in the area, including the giant Tupi discovery. LNG would be delivered to domestic terminals during the country's dry season when, gas-fired power generation supplements hydropower, and exported at other times.", "As offshore oil fields are being developed towards deeper and deeper waters, new technologies are required to curb capital expenditures. In Brazil, where oil consumption is increasing and huge oil fields lie in high water depths, the issue is particularly pressing. Earlier and higher oil production from those oil fields could be attained by the use of Electrical Submersible Pumps (ESP), so far restricted to dry completions. Also longer distances from well to platform would be made practical. For the initial phase of this development, Petrobras worked together with Tronic, Reda, Pirelli, Lasalle, Sade-Vigesa and Cooper. As a result, first-in-the-world ESP installation in a subsea well has been successfully achieved on October/1994 in RJS-221, located at Carapeba Field, Campos Basin, Brazil.", "BG Group recently produced a new estimate on the Tupi oil discovery in the Santos basin, stating that the field contains 12-30 billion boe or more. On the one hand, Brazil's Petroleo Brasileiro SA (Petrobras) did not comment on the revised production estimate. It can be remembered that Petrobras reported the discovery to be 8 billion bbl of light crude in 2007. Meanwhile, BG claim have been produced in a statement regarding the company's long-term growth strategy, released ahead of the presentation of its fourth-quarter results.", "Atlanta is a post-salt oil field located offshore Brazil in the Santos Basin, 150 km southeast of Rio de Janeiro. The combination of ultra-deep water (1550m), heavy and viscous oil (14 API), unconsolidated sandstones, low overburden (800m), faulted reservoir rock, etc., composes a unique and challenging scenario for which the remarkable solutions applied have been already detailed (Marsili et al. 2015; Pedroso et al. 2017; Monteiro et al. 2015; Pedroso et al. 2015; Rausis et al. 2015; Pedroso et al. 2015). The Atlanta field project was planned to be developed in two phases: the Early Production System (EPS) with three production wells, and the Definitive Production System (DPS) with up to nine wells. No injection wells have been planned. In 2013 and 2014 the first two wells, here called ATL-2 and ATL-3 (ATL-1 was a pilot well), were successfully drilled, completed, and tested as described in the above references. In May 2018, they started production. After almost one year and 5,000,000 bbl of produced oil, the third EPS well was constructed. The lessons learned in each phase of the well construction - drilling, lower completion, and upper completion - were applied in the third well, repeating the good operational performance. An analysis of this comparative performance is presented. Technology improvements were implemented, such as the use of autonomous inflow control devices (AICD), the use of micro-tortuosity logging to better position the electrical submersible pump (ESP), the use of an annulus diverter valve (ADV) to avoid the pressure drop across the ESP in case of failure, etc. The result was a well constructed ahead the planned time with a Productivity Index (PI) that exceeded expectations.", "Albacora, a giant field located under water depths ranging from 230m to 1,900m, in Campos Basin, offshore Brazil, has an estimated oil-in-place volume of 4.4 billion bbl and extends over an area of 235 km2. The development plan conceived for this field has been divided into three phases, which the first one is a cost-effective pilot production system, which has started field production in October, 1987. This paper describes many alternatives under study by PETROBRAS for installation of the second phase of the field exploitation. Water depths of the wellheads at this phase will reach 1,166m and the start-up is expected to occur in 1994, with a peak production of nearly 200,000 bopd in 1996. The alternatives differ basically in parameters such as the type (semi-submersible,compliant tower, jacket), quantity, size and location of the production units, the type and configuration of the subsea systems, the type of the production and export risers (rigid, semi-rigid or flexible) and also the level of the infra-structure integration. An economical analysis ends the paper and shows that Phase II, besides of performing a pioneer conception at world level, is also a cost-effective production system.", "When Petrobras' Garoupa Field production tower collapsed last September 7, the company replaced it with a provisional early production system designed to restore production until permanent platforms and pipe lines could be installed. This provisional system uses the seafloor pipe line, meter, loading tower and processing ship (Presidente Prudente Moraes) remaining from the original production system. These holdovers were combined with a 208-ton, 12-m-dia. monobuoy, an electronics control ship (Star Offshore Services marine's Star Hercules and a specially designed pipe line and manifold. This contingency system handled more than 30,000 bopd production from Garoupa and Namorado Fields while Garoupa's permanent platform was readied.", "Various companies have adopted new production practices in drilling industry. Cengroup Petroleum has signed a contract with the Azeri government to begin the oil-gathering process. A new gas pipeline, called Nabucco pipeline, is being planned to access the reserves at the Caspian basin that produces plenty of oil. It will head north from the path of the new Baku-Ceyhan pipeline. Cabinda Gulf Oil Co. began oil production from Lobito Field, in deepwater Block 14, offshore Angola. Roc Oil Co. began production from CliffHead oil field in the Perth Basin, offshore Western Australia. Chevron Frade Ltd. is also planning to develop Frade field, offshore Brazil, with Petrobras and Frade Japao Petroleo Ltd. The partners have signed construction and installation contracts for the major facilities. The project will cost about $2.4 billion.", "The Brazilian Pre-Salt region has garnered much attention since the first major discoveries were announced by Petrobras, in 2006. Since then, discoveries in the region have ranked among the largest in the world in the last ten years, including Tupi, Iara, and Libra. This led to various estimates, from within and outside the government, that mentioned extremely large total possible accumulations, ranging from 50 to over 300 billion barrels of recoverable oil in the \"Picanha Azul\" region, an area of approximately 150 thousand square kilometers. Since none of these estimates was accompanied by technical data, or a description of the methodology used, an assessment of the potential for yet-to-find oil was carried out using a software tool which models the exploration process, making Monte Carlo simulations based on the information available regarding wells drilled, discoveries made, respective dates, and the areas involved. The assessment methodology used has been successfully applied by the authors in evaluating the potential of other areas, such as the shallow waters of the Campos Basin. While the present Pre-Salt region assessment does not have as many information points available as in those prior assessments, the intense exploration activity has resulted in enough information being available about the region so as to be able conduct an assessment over the entire area. Applying the concepts of discovery sequence and field size distribution, and making geological estimates for parameters of the number and size of accumulations, the current assessment furnished a probability distribution for the number and expected size of individual accumulations (fields) yet to be discovered, as well as for the total accumulation of yet-to-find recoverable oil in the region. The relatively large range of possible values of the results reflects the lack of more exploratory experience (discoveries or dry wells), which will only come about with time, despite the intense exploratory efforts currently under way. Even so, it was possible to suggest that within probabilistic confidence levels of 95% and 5%, field sizes expected will range from 165 million barrels to eight billion barrels, and total accumulations will range from 115 billion barrels to over 288 billion barrels." ]

[ "Objective/Scope: Applicability of Enhanced Oil Recovery (EOR) processes is gaining interest among offshore operators in recent years. CO2/miscible gas injection and Water Alternating Gas injection (WAG) are the most attractive EOR methods being considered by most offshore operators. Due to limitations imposed by the surface facility, any process optimization done through standalone reservoir simulation could be unreliable as the facility constraints and its effects are neglected. In order to minimize risk and reduce uncertainty, successful modelling and optimization of such projects requires integration of subsurface modelling with surface facility model. In this work, field development and optimization of a complex offshore production system, from a Pre-Salt carbonate reservoir offshore of Brazil is studied. Different field development scenarios, including water flooding, miscible gas injection, and WAG injection, are considered. Compositional fluid model is used in order to correctly model the fluid mixing effects and miscibility. Pressure change and thermal effects are considered in all the facility equipment. The complexities of the surface network, including gas sweetening, compression, and fluid blending are included in the integrated model. A new multi-user, multi-disciplinary Integrated Production System Modelling (IPSM) tool is used to fully-implicitly couple reservoir simulation with surface facility model. Production from the offshore asset is optimized for different development scenarios. The provided IPSM approach optimized operational schemes that were consistent with the constraints of the offshore facility. Additionally, with this new approach, all users from different disciplines were able to collaborate seamlessly, and any possible inconsistencies and discontinuities that could occur due to use of multiple decision making tools were removed. The use of integrated production systems modelling for optimizing EOR schemes in offshore assets, particularly miscible WAG, is proved to provide more robust answers. The complexities and Uncertainties of such processes, for both reservoir and facility models, are successfully studied." ]

[ "A1341" ]

[ "In the early years of the offshore industry, Early Production Systems or EPSs were extensively utilized to develop marginal and/or complex reservoirs in progressively deeper and more remote waters. Their signature attributes were low capital and operating costs, simple designs and accelerated schedules to first oil. Today, Operators are emphasizing capital efficiency, design simplicity, compressed discovery to first oil cycle times and de-risking subsurface uncertainty as deepwater projects compete for capital allocation with onshore shale projects. Discussing history and applications, the authors show, how an EPS can enable an Operator to sanction developments of marginal reservoirs, mid-size reservoirs with expansion capabilities to capture reservoir upsides and phased developments of giant reservoirs. This paper addresses major subsurface uncertainties impacting development decisions and strategies to gather relevant dynamic information to mitigate risk. It provides a brief history of EPSs deployed in the North Sea, Brazil and GoM including a database of EPS platforms based on an extensive literature review. A case history in each region to demonstrate the utility of an EPS to derisk and enable commercial production of marginal, mid-size and large fields. A discussion is presented for EPS platform selection based on the research of platforms deployed in the three major deepwater regions. This discussion will facilitate to develop a roadmap for the Operators and Development Planners with tools to rapidly deselect or retain options in the early development planning stage while there is a high degree of reservoir uncertainty and pressure to compress cycle time to first oil following a discovery.", "Current oil prices have made the offshore exploration of oil reserves a major challenge for oil companies. Standardization and extensive use of chattered units has allowed Petrobras to effectively promote competitiveness, cost reduction and reduced schedules in its projects. As a step forward in its pursue for cost reduction Petrobras has recently looked into Integrated Field Development. This article presents a low cost methodology for the design of production systems. Experience shows that integration among reservoir, flow assurance, subsea, well design and topsides teams is crucial for achieving a successful project. Besides being pursued for a long time, this integration has only been partially achieved in the industry and cost reduction opportunities have been lost. This article shows a cost driven methodology that can be used for guidance in the generation and screening of FEL1 alternatives. Metrics for the various parts of the system have been created and integrated in a simulation environment that allows economic analysis of different sorts. In FEL2 the methodology allows, for example, the evaluation of the number and capacity of platforms, the optimal schedule of well construction, the use of flexible or rigid risers, the diameter of production lines and the choice of technologies for handling streams with high C02 concentration in an integrated way. A simulation of an oil field shows effective results. In this new methodology a representation of each discipline is developed to allow their integration with the objective of making comparative economic analysis of alternatives.", "Creating an accurate subsurface model is paramount to many geophysical and geological workflows. Examples are background models for seismic inversion, rock property models for reservoir characterization, and geological models of depositional elements for seismic morphological interpretation. The standard workflow for creating subsurface models using seismic data is stratal slicing. The stratal slicing approach, however, may break down in the case of complex stratigraphic or tectonic structuring, such as shelf-to-basin clinoforms, delta lobe switching, deep-water channel-fan complexes, and deformation due to salt tectonics. This paper illustrates how the results obtained with high-resolution inversion and the incorporation of a stratigraphically consistent low-frequency model generated through horizon mapping - called the HorizonCube - improves the quality of the estimation of the subsurface parameters in structural complex settings. Using two data examples with different seismic data and geological settings from the North Sea and offshore Brazil, the paper will demonstrate the increased accuracy of the final inversion result using a data-driven HorizonCube.", "The increase of oil exploration and production in a given ocean area may put new requirements on the design of mooring systems for the floating units. It is necessary to simplify the underwater layout through the reduction of the lines horizontal span and to allow smaller distance between the production units. In this context the utilisation of taut-leg mooring system seems to be very attractive. The main object of the this paper is to present a comparison between taut-leg and conventional mooring systems in terms of total unit offset and horizontal span. It is presented, initially, the main lines of a synthesis procedure that the authors have developed to select the best configuration for the mooring system, in order to accelerate the search of the solution. In order to make the comparison between the taut-leg and the conventional mooring systems, the synthesis procedure is applied to PETROBRAS semisubmersible platforms SS-20 operating at a water depth varying from 600 to 1000 meters. The results obtained in the analysis show the great advantages of the taut-leg configuration with respect to the total offset and horizontal span.", "The high CO2 content found in Pre-Salt offshore oil fields has led to cost-energetically processes for CO2 removal and destination. In this paper, an innovative and promising alternative subsea separation process (SSP), proposed by Petrobras, was analyzed. Since a CO2 rich phase is expected at reservoir conditions, subsea gravity separators can be employed avoiding large volumes of CO2 from being sent to the topside, lowering gas processing plant complexity. A differential-algebraic system of equations (DAE) was developed for the SSP modeling. Design and steady-state simulations were carried out within EMSO simulator. To ensure the process variables remain at their desirable values two control strategies, PID and Linear Model Predictive Control (MPC), were compared. The proposed process showed technical feasibility with up to 62% GOR reduction. The control strategies presented reasonable performance. MPC had for most of the controlled variables a better performance.", "The Exploration and Production Department of Petrobras asked the R&D Center the development of a production system for 1800 m water depth, in Campos Basin, which would allow the installation of Steel Caterany Risers (SCR) in the starboard side of a production platform. The subsurface buoy concept was chosen as one of the alternatives. This concept has being developed since the preliminary studies conducted in the first phase of JIP Deepstar. This concept has an advantage of uncoupling the movements of the platform from the risers, reducing the loads due to the risers in the platform and allowing the installation of this system before the installation of the production vessel, anticipating the production of the field. This article shows the main characteristics of the buoy, its sizes, results of structural analyses and installation procedures for a buoy which sustains 14 SCR and 5 umbilicals in one side and 14 flexible jumpers and the same 5 umblicals in the opposite side. This concept was tested in two model test tanks, where it was verified that this concept is feasible. Also, information related to a field trial with a prototype installed in Brazilian waters will be presented.", "This paper focuses on solutions and strategies for conserving weight and space, reducing emissions, and leveraging data to optimize the performance of rotating equipment on floating, production, storage, and offloading (FPSO) vessels. It discusses design considerations for gas turbines in offshore applications (i.e., dry-low emissions technology, use of lightweight components, etc.) The paper also outlines a holistic digital lifecycle approach to FPSO topsides, which can help reduce capital and operating expenses, shorten project development cycles, and decrease offshore manpower requirements. For illustrative purposes, the paper discusses specific power and compression solutions that were implemented on various offshore projects in 2017 - 2018, ranging from Offshore Brazil to the Bering Sea. It outlines how the equipment configurations helped operators meet horsepower requirements and emissions targets, as well as CAPEX and OPEX objectives. Additionally, the paper discusses how digital transformation can be leveraged to optimize FPSO lifecycle performance, delivering benefits such as 4-12 week reduction in project cycle times, ~$7 million reduction in CAPEX, and $60 - $100 million reduction in OPEX over a 10-year period.", "The finite element method was applied for the driving simulation of special offshore piles with a conic shape toe. The FEM solution developed allowed realistic modelling of the several aspects involved, such as the geometric characteristics of the pile, the surrounding soil including stratification, the pile soil interface as well as the hammer blow. This novel computational procedure was applied in a pile driving design and the numerical results predicted fitted with the results observed in an actual offshore installation carried out by PETROBRAS.", "Surface Related Multiple Elimination (SRME) has been approved to be an effective demultiple tool for marine data processing. However, it breaks down when applied to shallow water data mainly because 1) missing or contaminated near-offsets lead to inaccurate multiple models; 2) the cross-talk of short-period multiples deteriorate the matching filter during the adaptive subtraction; 3) the spectrum of the multiple model is distorted by the extra source signature. This paper proposes a new approach that combines a model-based method and a conventional SRME to serve the means of shallow water multiple elimination (SWME). The advantages include: 1) replacing the water-bottom Green's functions with broadband wavelets predicts the correct amplitudes of the multiples; 2) limiting the aperture of the Green's functions to the distance where the critical reflection occurs suppresses the artefacts in the multiple model and lowers the cost; 3) Simultaneously subtracting both the receiver- and source-side water-bottom multiples significantly improves the efficiency; 4) a following SRME helps remove the residual non-water-bottom multiples. A broadband 2D line offshore Santos, Brazil is tested with the proposed approach. It has prominently outperformed the legacy processing that used SRME and Tau-P deconvolution years ago.", "The Sapinhoá and Lula North-East fields, 300km offshore Rio de Janeiro, Brazil are the two pilot fields of the Pre-salt development strategy. Field architecture consists of satellite wells connected to a spread moored FPSO in each of the fields. Through a design competition Petrobras and Partners selected the de-coupled riser system developed by Subsea 7. In each field two BSRs (Buoy Supporting Risers) anchored at 250m below waterline support the rigid risers on one side and flexible flowlines running to the FPSO on the other. Each BSR displaces close to 10,000t of water and provides a nominal net up thrust of 3,250t. This Paper highlights the engineering challenges and the solution developed for the large-scale foundation anchors that support these massive BSRs in the harsh environment of the Santos Basin in 2140m water depth. Vertically below each corner of the BSR tank an 8m diameter by 18m penetration suction anchor houses the receptacles for the pair of tethers. Tension in the tethers was tuned to optimise the system stiffness (to minimise lateral BSR excursion orbits and avoid clash of risers and FPSO mooring lines) while requiring minimum anchor capacity. Four ballast modules of 150t each sit on top of each suction anchor to provide the remainder of the required uplift resistance. Soil conditions across both fields consist of soft silty clay. A geotechnical FE model of the suction anchor in Abaqus was used to evaluate the interaction of the structure, surrounding soil and trapped water beneath the top cap. The model was used to develop the complete load-displacement curves of the system during the undrained design current events. A consolidation FE model using the Soft Soil model in PLAXIS showed that the hybrid anchor/ballast system under sustained uplift loading is stable throughout the design life for the level of sustained design load. Although the LRFD verification format of suction anchors and gravity anchors are well covered in the design codes, there seems to be a gap in the coverage of this particular type of hybrid anchor. The governing condition was found to be the long term drained pull-out capacity under sustained loading with the assumption of slowly leaking suction port and air evacuation port at the top." ]

[ "This paper reports the Lessons Learned from an innovative linepipe solution that was successfully implemented on P55 Deepwater Project. The P55 field is located offshore Brazil, in the northern area of Campos Basin, in a water depth ranging from 1500m to 1900m. The scope of work consisted in engineering, procuring, fabricating and installing 16 rigid Steel Catenary Risers (SCRs), which are the first of their kind in this area. The corresponding 12-inch SCR qualification results are presented in the perspective to show the significant benefits of the technology used and its potential developments to High Pressure & High Temperature applications. In order to meet tight Hi-Lo requirements together with high fatigue performances, innovative Pipe End Design and associated automatic welding procedures were developed and qualified. The paper describes the complete sequence of pipe manufacturing process, from hot-rolling to final machining, which resulted in a concentric and reproducible pipe end geometry, ideal for limiting Stress Concentration Factors. An extensive qualification program of Full Scale Fatigue test was conducted on girth-welded strings and the associated results showed performance levels at least four times above the target curve. Moreover, Lessons Learned from the offshore campaign established that developed Pipe End Design led to significant improvements in welding times and subsequent J-laying rates. Details on how the technology effectively reduces critical times and lowers rejection rates are provided on the basis of the actual P55 offshore campaign. In addition to the advantages detailed in the paper, the presented linepipe solution proves to be also applicable to High Temperature fields, since the enhanced fatigue behavior was found to compensate a temperature derating up to 270°C. In fact, the presented manufacturing and welding technologies have opened the perspective of ongoing Developments, which are believed to bring a reliable solution for combined High Pressure and High Temperature applications." ]

[ "A1774" ]

[ "Steel catenary risers (SCRs) have been successfully deployed on the Shell Auger TLP in the Gulf of Mexico and will also be deployed on the Shell Mars TLP. There is considerable interest in using SCRs for other applications, in particular for semi-sub based FPS systems. Petrobras is developing an SCR for installation on the P-XVIII platform, located in the Marlim Field, Campos Basin, in a water depth of 910 meters. The riser will be a dead-ended prototype which will be monitored for a period of up to one year. Subsequently, it will be connected via flexible piping to the P-XXVI platform, located approximately 5 kilometres from P-XVIII. This paper describes the design, materials, components, specification and installation of the Petrobras P-XVIII SCR. The static/dynamic design, VIV analysis and fatigue analysis methodologies are discussed in detail and results are presented. Important aspects of the flex joint design and specification are discussed. This project represents the first application of SCRs to semi-sub based FPS systems. In addition, it is the first use of SCRs outside of the Gulf of Mexico.", "The SCR (Steel Catenary Riser) was adopted by Petrobras as a cost-effective alternative for oil and gas export lines on deepwater fields, where large diameter flexible risers present technical and economic limitations. The SCR structures are subjected to several types of loads during their service life. These loads may be static or dynamic. When installed, the action of environmental phenomena like wind, current and sea waves on the floating unit, induces motions that will be transferred to the riser top connection. The random time domain dynamic analysis approach is considered to be more suitable to represent the loads and also die structural response due to the capability to represent existing non-linearities in the model. The sea-state spectra are treated by a time-simulation method, so fluid load non-linearity and fluid-structure interaction are well represented. Structural non-linearity, drag forces, fluid-structure relative velocity, and sea surface level variations are also taken into account. The fatigue damage calculation is directly related with stresses ranges composed along the whole structure service life. The load sets used in such analysis should be complete enough to represent all possible significant situations. This procedure results in a high computer time consuming necessary for several time-domain analyses, that is not compatible with a typical design schedule. Therefore, the load cases have to be reduced without lack of accuracy or safety. This paper presents the approach and methodology adopted in Petrobras to verify the SCR fatigue damage. The analysis performed and presented used the Petrobras's in-house computer codes ANFLEX and POSFAL, which were specially upgraded for this purpose.", "The development of Brazil's Offshore fields has been performed using flexible pipes because this pipe technology offers significantly increased flexibility, enabling the movement of pipes between wells and reducing lead time to bring a well onstream as compared to rigid pipe solutions. In addition, the decision of where exactly to drill development wells can be delayed, thus making the drilling campaigns easier, cheaper and faster [1]. With the increased activity in Pre-Salt, some challenges to flexible pipes were uncovered and needed to be addressed, notably oil composition and corrosive agents, e.g. H2S, and, specifically for the case of this paper, CO2. At high pressures, such as found in pre-Salt fields, these contaminants create new Stress Corrosion Cracking (SCC) failure modes and several mitigation measures have been adopted to overcome them, focused either on the installed fleet or on the next generation of pipes to be delivered. SCC is a condition that induces failure in the pipes' metallic layers, but it needs three elements to occur: water, tensile stress exceeding a critical level and a susceptible material. If one of these three elements is suppressed, the phenomena does not to happen. This paper will cover and present a technology developed to detect the annulus water condition - dry or flooded - and thereby allow a correct integrity management strategy to be adopted. The technology is based on an embedded sensing system together with topside equipment to read the status. The use of such a system is important for the next generation of flexible pipes as it will allow better management of the fleet, with the required measurements performed from the production unit without the need of any support vessel and hence at a reduced cost.", "The development of Brazil Offshore fields using flexible pipes took the advantage of the possibility to move around lines, anticipate the production and postpone the decision of where exactly the development phase wells should be placed, making the drilling campaign easier, cheaper and faster. For the Pre-Salt fields, mainly in Santos Basin, it is observed high concentrations of H2S and CO2, two major impact contaminants for the metallic layers of the flexible pipe. A new failure mode by SCC is the most concerning one and have several approaches either focused on the installed fleet or focused in the next pipes to be delivered. SCC is a condition that induces cracks in the pipes metallic layers and need three elements to happen: water, stress and susceptible material. If one of these three elements is suppressed, the phenomena is not to happen. This paper will cover and present a design of a seal tight end fitting also with capabilities to be seal tested from the shop during the factory acceptance test and further means to identify if the flexible pipe section is flooded or dry visually, using ROV. This information is key for the integrity management of the flexible pipes applied to pre salt fields to assure the most extent of the service life.", "As part of the ultra-deepwater field development of the Santos Basin, 300km offshore the Brazilian coast, the Sapinhoa and Lula NE pioneering riser system was successfully installed by Subsea 7, acting as a contractor for Petrobras and partners (BG E&P Brasil and Repsol Sinopec Brasil, in Sapinhoa Field, BG E&P Brasil and Petrogal Brasil, in Lula NE Field). The full Engineering, Procurement, Installation and Commissioning (EPIC) project scope comprises the design, fabrication and installation of 4 buoys of 2800 tons moored 250m subsurface, of which 2 connect to the Floating Production, Storage and Offloading unit (FPSO) Cidade de Sao Paulo and 2 to the FPSO Cidade de Paraty; 27 Steel Catenary Risers (SCRs) with 3.9km each, 27 Pipeline End Terminations (PLETs) and anchorage suction piles at 2140m water depth. This Buoy Supporting Risers (BSR) system concept presents several advantages to overcome the challenges of installing SCRs on ultra-deep waters, such as, allowing decoupling between installation of risers and the production unit, reducing payload on the unit, reduced risks associated with clashes and very small dynamics transmitted from production unit to the risers, resulting in significant less fatigue issues. Due to sour and C02 service requirements for the production and water injection risers, it was decided to use mechanically lined pipe for the entire line, with the exception of the top and touch down sections, where metallurgical clad (metclad) pipe was used. Consequently, a significant amount of qualification, testing and inspection associated to welding lined and metclad pipes was required. In order to install Corrosion Resistant Alloys (CRA) lined pipes with a Reel-Lay vessel, a novel methodology for water pressurized spooling and pipelay was developed to mitigate the risk of liner damage during installation. Full-scale pressurized spooling trials were done ahead of the pipelay campaign for testing and validation of this methodology. In addition, analyses were performed to evaluate the BSR system behaviour during SCRs installation and to minimize buoy de-ballasting interventions. This paper describes the faced challenges and solutions engineered in the steel catenary risers' fabrication and installation scopes.", "One of the main challenges in rigid riser design for Brazilian Pre-salt is the fatigue limit state. At this new production frontier, some key points are imposed as a challenge for riser designers, mainly due to the high level of motions imposed by the FPSO at the riser top in a coupled system with water depth around 2200 meters, and thicker riser's thermal insulation demanded for flow assurance (which worsens the dynamic response of production risers). Additionally, high contaminant levels in the fluid (CO2 &amp; H2S) demands CRA materials. Within this context, Petrobras has been considering Steel Lazy Wave Riser (SLWR) configuration as a base case scenario for rigid riser projects, since this configuration is able to absorb part of the FPSO motions that would reach the touch down zone (TDZ) and, consequently, making this region much less demanded when compared against Steel Catenary Risers (SCR). In its pioneer deepwater SLWR [1], Petrobras adopted a conservative approach for fatigue assessment that involved degenerated SN curves from DNV-RPC203, i.e. D curve in cathodic protection with the slope changing point (SCP) shifted to 5×106 for external wall and F1 curve in air with SCP at 5×107 for internal wall. More recently, both DNVGL and BSI have reviewed their fatigue assessment codes and no longer holds parity between SN curves. BS-7608 Ed. 2014 introduced different SCPs in order to account for a possible non-conservativeness in the assessment of low stresses under variable amplitude in the loading spectra. DNVGL-RP-C203 Ed. 2016 now presents three different bilinear SN curves for the internal wall of pipelines and risers that depends on weld misalignment, while it keeps SCP unchanged. This paper presents a recent case study for a typical SLWR configuration in pre-salt, in order to evaluate the impact of the changes proposed by the new versions of these design codes in the fatigue life of riser girth welds. Results of this work showed that the impact of different positioning of slope changing points in SN curves can have a great importance for riser design, since typical load spectrum lies around this region. Fatigue life could be increased up to twice or three times if one of these codes are adopted instead of the Shifted SN curves. However, the effect of low stresses under variable amplitude loading spectra is still a concern and it should be further investigated.", "The Exploration and Production Department of Petrobras asked the R&D Center the development of a production system for 1800 m water depth, in Campos Basin, which would allow the installation of Steel Caterany Risers (SCR) in the starboard side of a production platform. The subsurface buoy concept was chosen as one of the alternatives. This concept has being developed since the preliminary studies conducted in the first phase of JIP Deepstar. This concept has an advantage of uncoupling the movements of the platform from the risers, reducing the loads due to the risers in the platform and allowing the installation of this system before the installation of the production vessel, anticipating the production of the field. This article shows the main characteristics of the buoy, its sizes, results of structural analyses and installation procedures for a buoy which sustains 14 SCR and 5 umbilicals in one side and 14 flexible jumpers and the same 5 umblicals in the opposite side. This concept was tested in two model test tanks, where it was verified that this concept is feasible. Also, information related to a field trial with a prototype installed in Brazilian waters will be presented.", "Due to advances in the development of technology for distributed or small-scale gas-to-liquids (GTL) technology, a much more flexible and economical option for capturing associated gas, both on- and offshore - in the form of modular GTL technologies - is approaching. These systems are designed to operate efficiently and economically when producing ? 500 bpd. UK-based company CompactGTL plc and Velocys are developing modular solutions that combine steam methane reforming (SMR) and Fischer Tropsch (FT), and both have found ways to reduce the size of the hardware. In the integrated two-stage system developed by CompactGTL, which is designed to incorporate modules weighing < 25 ton and producing 200 bpd of liquids per module, the SMR and FT reactions are carried out in a series of mini-channels. In contrast, the Velocys combined SMR/FT system for offshore GTL takes advantage of microchannel reactor technology to shrink the hardware and intensify the processes even further. Both the CompactGTL and Velocys technologies have reached the trial stage. CompactGTL entered into a joint development testing agreement in 2006 with Petrobras to deliver a 20 bpd pilot plant to be tested onshore at the Petrobras Aracaju site in Brazil. While, in March 2010, Velocys entered into a joint demonstration and testing agreement with offshore facility developer Modec, Toyo Engineering, and Petrobras, to build and operate a 5-10 bpd microchannel GTL demonstration plant at the Petrobras facility in Fortaleza, Brazil. The trials being undertaken by CompactGTL and Velocys suggest that it may well be possible to reap the advantages of small-scale GTL sooner rather than later.", "Thermoplastic composite pipes (TCP) is a fully bonded pipe structure with a solid wall construction constituted from a single polymer material reinforced with embedded (melt-fused) fibre reinforcements. DNV GL published in December 2015, the new Recommended Practice DNVGL-RP-F119, intended for the design and qualification of Thermoplastic Composite Pipes in offshore applications. This paper describes Airborne Oil & Gas approach to qualifying its ultradeep water TCP products to the new standard. Because of its intrinsic properties, including being lightweight, spoolable, and collapse and corrosion resistant, TCP is very much suited for riser applications. After applications such as a 1\" high pressure methanol injection jumper in the North Sea, a 6\" flowline for hydrocarbon conveyance off the coast of Sarawak, Malaysia, and a 2\" gas lift line in the North Sea, Airborne Oil & Gas has now started the development of TCP for high pressure high temperature dynamic production riser applications. A typical offshore Brazil pre-salt field ultradeep water design premise has been used to assess the feasibility of 6\" and 8\" free hanging TCP Risers. This was done in close cooperation with a major operator in Brazil and SURF contractor. Global, installation and local analyses of the TCP Riser system have shown the feasibility of installation as well as operations in a free hanging catenary configuration throughout the 30 years' service life. After technical feasibility had been demonstrated, a detailed business case study was performed in order to quantify the potential CAPEX savings that TCP technology can bring compared to the low lazy wave systems currently installed in pre-salt fields, offshore Brazil. Considerable savings are expected, especially on pipe procurement costs. Further savings on OPEX are also expected and are related to corrosion and biocide inhibition operations.", "The Oil and Gas industry is currently investigating innovative solutions in order to develop new fields in deep-water, remote areas and to increase the recovery of mature fields. Subsea separation solutions enhance production while better managing hydrates (gas/liquid separation) or allow the debottlenecking of topside water treatment (water/hydrocarbon separation and subsea water re-injection). SAIPEM is currently developing several subsea separation systems made of pipes working in parallel: The MULTIPIPE for the subsea gas/liquid separation and the SPOOLSEP for subsea water/hydrocarbon separation. For each technology, the design is relying on flow split and operation of pipes in parallel. Extensive qualification tests were undertaken focusing on the symmetry of the system and its operability for subsea application. These separators with reduced wall thicknesses, compared to single large diameter vessels, are especially well suited to deep water and /or high pressure applications. Moreover these solutions are reliable as they rely on gravity separation and allow for standard manufacturing and installation procedures as well as conventional installation and maintenance vessels. The gas/liquid Multipipe separator has been qualified through several test campaigns, including a first JIP with tests with real crude under pressure to simulate subsea operation showing its versatility for deepwater application. A second JIP with Petrobras, Total and ENI has been completed early 2013. It has covered the qualification of the whole subsea station and the performance of additional flow performance tests. Further qualification actions including tests have been identified in view of some recent high pressure application cases. Following the positive results on the Multipipe Saipem has initiated the development of the water/hydrocarbon SpoolSep separator. The paper presents the results of the first qualification tests on separation performance which started early this year as well as the way forward which includes a JIP for the performance of tests with real crude." ]