A multidisciplinary approach for studying deep-sea habitats in Santos Basin

Bendia, Amanda Gonçalves; Carrerette, Orlemir

doi:10.1590/2675-2824070.22161agb

Cited by 3 publications

(1 citation statement)

References 20 publications

(19 reference statements)

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“…The interest in describing these communities has increased in the past 20 years as the region is associated with the extension of presalt oil fields (Cavalcanti et al, 2017) and was, from 2000 to 2008, subjected to intense bottom fishing (Perez et al, 2009). Significant advances in our understanding of the biological, geological, and geochemical aspects of these benthic ecosystems have derived from recent initiatives of the oil and gas industry, especially focused on exploring potential gas seepages in the region and its associated chemosynthetic communities (Bendia and Carrerette, 2022;Carrerette et al, 2022;Sumida et al, 2022, and others). Adding to these efforts and to the need to provide environmental baselines for the sustainable development of oil and gas exploration in the region, the 'iAtlantic_BR10-Petrobras' expedition was a joint iAtlantic -Petrobras enterprise conducted on board the research vessel 'NPqHOc Vital de Oliveira' of the Brazilian Navy, which focused on mapping the local seafloor and characterizing its deep ecosystem structure and functioning.…”

Section: Introductionmentioning

confidence: 99%

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic

Perez,

Barros Neto,

Arantes

et al. 2023

Ocean Coast. Res.

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The iAtlantic Project has established an international collaborative strategy to improve mapping and characterization of deep and open ocean ecosystems in understudied regions of the Atlantic and evaluate their health. In December 2022, the first iAtlantic expedition in the South Atlantic set off to map and explore seafloor ecosystems in the Santos Basin slope (200-1,000 m depths) in collaboration with the Petrobras 'Santos Basin -Regional Characterization Project.' The 17-day 'iAtlantic_BR10-Petrobras' cruise was conducted on board the research vessel NPqHOc Vital de Oliveira (Brazilian Navy) and performed (a) water column structure characterization, (b) seafloor morphology mapping, (c) description of benthic habitats and communities by seafloor imagery and biological/ geological sampling, and (d) ex-situ experiments to assess the functioning of sedimentary ecosystems and their responses to climate-related environmental changes. This study describes the rationale behind the iAtlantic_BR10-Petrobras cruise science plan, reports its sampling strategy and methods, and summarizes its collected data and preliminary results.

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Section: Introductionmentioning

confidence: 99%

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic

Perez,

Barros Neto,

Arantes

et al. 2023

Ocean Coast. Res.

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Rescuing the history of siboglinids in Brazilian deep waters: Neotype designation for the species Siboglinum besnardi Tommasi, 1970 and Siboglinum nonatoi Tommasi, 1970 (Annelida: Siboglinidae)

Bergamo,

Carrerette,

Rizzo

et al. 2024

Mar. Biodivers.

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A study on the accumulation model of the Santos basin in Brazil utilizing the source–reservoir dynamic evaluation method

Yan,

Zuo,

Zhang

et al. 2024

Sci Rep

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The exploration potential within deep-water petroliferous basins holds great promise for oil and gas resources. However, the dearth of geochemical and isotopic data poses a formidable challenge in comprehending the intricate hydrocarbon charging processes, thereby impeding the comprehensive understanding of hydrocarbon accumulation mechanisms and models. Consequently, the establishment of robust source–reservoir relationships in deep-water petroliferous basins represents a pivotal challenge that significantly influences the exploration strategies and the comprehension of hydrocarbon enrichment dynamics within such basins. In this study, we introduce a novel approach, termed the “source–reservoir dynamic evaluation method,” tailored to investigate reservoir accumulation models in deep-water petroliferous basins. This method uses basin simulation technology to recover the thermal evolution history and hydrocarbon generation and expulsion history of source rocks, and on this basis delimits the hydrocarbon kitchen range. At the same time, the maturity of source rocks corresponding to crude oil and natural gas in typical reservoirs is calculated. Then, when the thermal evolution degree of source rocks adjacent to the reservoir reaches this maturity, the corresponding geological period is the main charging period of hydrocarbon. As a typical deep-water petroliferous basin, the Santos Basin in Brazil has abundant oil and gas reservoirs under the thick salt rock, but there are still some fundamental problems such as unclear oil–gas accumulation process and model. Therefore, in this paper, the main charging periods of typical hydrocarbon reservoirs are determined based on the internal relationship between the thermal evolution history of the main source rocks and the maturity of crude oil and natural gas, and then the hydrocarbon accumulation process is analyzed and the dynamic accumulation model is established. Finally, the favorable prospecting direction is pointed out. The results show that the oil and gas in the Barra Velha Formation in the Santos basin are mainly derived from the Itapema Formation lacustrine shale source rock, and the source rock is mainly developed in the Eastern Sag of the Central Depression, and its main hydrocarbon generation period is from the deposition period of Florianopolis Formation to the deposition period of Santos Formation. The main hydrocarbon expulsion period was from the deposition period of the Santos Formation to the Early deposition of the Iguape Formation. The oil and gas in the Barra Velha Formation were mainly charged from the Late deposition period of the Santos Formation to the Early deposition period of the Iguape Formation. During this period, the hydrocarbon migrated vertically along the normal fault formed in the rift period to the trap of the adjacent inheritance structural highs and accumulated in the reservoir, which was dominated by the accumulation model of the “lower generation-upper reservoir-salt cap”. Since the Barra Velha Formation has the characteristics of near-source accumulation, based on the hydrocarbon expulsion center and hydrocarbon expulsion intensity of the source rock of the Itapema Formation, the distribution ranges of 85% and 50% Pre-salt accumulation probability in the Santos basin were calculated by using the quantitative analysis model of the hydrocarbon distribution threshold. It is suggested that the next oil and gas exploration should be carried out in the paleo-structural highs and slope of Class I favorable area (the hydrocarbon accumulation probability is more than 85%) and Class II favorable area (the hydrocarbon accumulation probability is 85–50%).

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A multidisciplinary approach for studying deep-sea habitats in Santos Basin

Cited by 3 publications

References 20 publications

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic

Deep sea ecosystem exploration and ‘health check’: sampling strategy and methods applied during the iAtlantic_BR10_Petrobras cruise in the Santos Basin, Southwest Atlantic

Rescuing the history of siboglinids in Brazilian deep waters: Neotype designation for the species Siboglinum besnardi Tommasi, 1970 and Siboglinum nonatoi Tommasi, 1970 (Annelida: Siboglinidae)

A study on the accumulation model of the Santos basin in Brazil utilizing the source–reservoir dynamic evaluation method

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