Structural inheritance and its control on overpressure preservation in mature sedimentary basins (Dongying depression, Bohai Bay Basin, China)

Tao, Ze; He, Zhiliang; Alves, Tiago Marcos; Guo, Xiaowen; Gao, Junfeng; He, Sheng; Zhao, Wen

doi:10.1016/j.marpetgeo.2021.105504

Cited by 9 publications

(6 citation statements)

References 68 publications

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“…Hydrocarbon generation and accumulation in the Dongying Sag is mainly distributed in the Paleogene formations (Tao et al, 2022). Previous studies have shown that three sets of primary source rocks were developed in the Eocene Shahejie formation, namely, Es4s, Es3x, and Es3z (Zhang et al, 2019;Song et al, 2020;You et al, 2020) (Figure 2).…”

Section: Geological Settingsmentioning

confidence: 93%

“…Sediments from the Paleogene Kongdian (Ek), Shahejie (Es), and Dongying (Ed) formations, as well as the Neogene Guantao (Ng), Minghuazhen (Nm), and Quaternary Pingyuan (Qp) formations, fill the Dongying Sag. The Kongdian formation mainly consists of shallow lake shale and siltstone interbedded with some sandstone, along with the development of different levels of red beds (Zhan et al, 2019;Tao et al, 2022). The Shahejie formation is dominated by semideep to deep lake mudstone and siltstone sediments and coarse deltic sandstone interbedded with conglomerates.…”

Section: Geological Settingsmentioning

confidence: 99%

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Physical properties variation of crude oil under natural laboratory and its geological implications: Dongying Sag, eastern China

et al. 2023

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The Dongying Sag in eastern China is a mature exploration area and contains a wide variety of accumulations ranging from extra heavy oil to light oil. This multi-source lacustrine rift basin provides meaningful insights into the relationships between organofacies, maturity, charging, mixing, and oil properties. The Es3 source rocks are in the immature to mid-mature stage, while the Es4 source rocks are in the immature to late mature stage. Among them, Es4 source rocks were deposited in an anoxic, stratified, brackish water environment. Based on the kinetic model, it appears that the oil generation rate of Es4 source rocks is higher than that of Es3 source rocks, and the oil generation time of Es4 source rocks was earlier than that of Es3 source rocks. Whether in Es4 or Es3 members, source rocks with the kerogen type I have the greatest oil yield compared with other kerogens. The variations in oil physical and geochemical properties can be attributed to differences in organofacies and thermal maturity, which is in agreement with the results of source rock geochemistry and macerals analysis. Because the concentrations of maturity-related biomarkers or non-biomarkers show several orders of magnitude variation across maturity windows, these maturity parameters do not reliably characterize the maturity signals in mixed oil scenarios. Maturity parameters based on biomarker ratios can produce biases that overemphasize the contribution of low maturity oils and thus track the signals of low maturity end-member oils. In contrast, maturity parameters based on aromatic isomers are more sensitive to mixing processes and reflect the mixing degree of the accumulated oils. The same series of maturity parameters can track hydrocarbon migration pathways and relative maturity, while multiple series of maturity parameters can reconstruct hydrocarbon charging and mixing histories.

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Section: Geological Settingsmentioning

confidence: 93%

Section: Geological Settingsmentioning

confidence: 99%

Physical properties variation of crude oil under natural laboratory and its geological implications: Dongying Sag, eastern China

et al. 2023

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“…The Bohai Bay Basin comprises one of the largest Cenozic rift basins in the world, spanning through an area of 200,000 km 2 (Figs. 1b and DR1) 20 . Multiple stages of magmatism occurred in the basin from Mesozoic to Cenozoic, with HTVCs becoming widely developed, though seldom documented in the literature.…”

Section: Magmatic Intrusions and Associated Extrusion Edi Ces Often G...mentioning

confidence: 98%

“…Volatile components released by HTVCs have played a signi cant role in driving global climate warming, such as in the cases of the early Jurassic warming 8 , and the well-known PETM 7 . While the intrusion of magma, and associated HTVCs, are regarded as primary mechanisms driving global warming events during continental rifting [7][8] , this mechanism has never been recognized as responsible for the the LOW event, despite the fact that magma-rich continental rifting has occurred during the late Oligocene -early Miocene throughout the globe [20][21][22][23] .…”

Section: Magmatic Intrusions and Associated Extrusion Edi Ces Often G...mentioning

confidence: 99%

“…The relative ages of the interpreted seismic units were also correlated by the published literature 55,56 , and are consistent with the stratigraphic framework of Sinopec's Exploration and Production Research Institute. Key stratigraphic markers include: 1) a Paleocene and Eocene interface (T8) marking the boundary between syn-rift stages 1 and 2; 2) the top of the Es3 member (T4), which marks the top of main source rock intervals in the study area; and 3) the Oligocene-Miocene boundary (horizon T1), a regional unconformity marking the end of syn-rift tectonics in the study area 20 (Fisg. 2 and DR2).…”

Section: Seismic Data and Interpretationmentioning

confidence: 99%

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Cenozoic igneous activity in Northern China as a mechanism for late Oligocene climate warming

Tao

Alves

et al. 2022

Preprint

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Continental rifting is often associated with important magmatism, which significantly influences the Earth’s climate. In this study, we use comprehensive of 3D seismic and borehole datasets from Northern China to document magma intrusion and associated hydrothermal vent complexes (HTVCs) during the Cenozoic. The aim is to understand their impact on late Oligocene - early Miocene climate. Both Mesozoic and Cenozoic magma intrusions occurred in the Bohai Bay Basin, Northern China, while Cenozoic magmatism in the Bohai Bay Basin occurred during late-Oligocene to early-Miocene, when the final stage of rifting occurred in the region. Methane produced by Cenozoic magma in the Boxing Sag alone is estimated to be 27.2-820 Gt, which accounts for approximately 3-5% of the total methane produced in Northern China (1760-21100 Gt). Our study suggests that warm climate during late Oligocene was potentially subjected to intensive rifting related sill emplacements in basins such as the Bohai Bay Basin. Giving the extensively developed Cenozoic magmatic intrusions in the Bohai Bay Basin, our results suggest that, similarly to the Paleocene-Eocene thermal maximum (PETM), igneous activity during late-Oligocene might played a significant role in driving the Late Oligocene Warming event.

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Main controlling factors and movability evaluation of continental shale oil

Pang

Wang

et al. 2023

Earth-Science Reviews

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Structural inheritance and its control on overpressure preservation in mature sedimentary basins (Dongying depression, Bohai Bay Basin, China)

Cited by 9 publications

References 68 publications

Physical properties variation of crude oil under natural laboratory and its geological implications: Dongying Sag, eastern China

Physical properties variation of crude oil under natural laboratory and its geological implications: Dongying Sag, eastern China

Cenozoic igneous activity in Northern China as a mechanism for late Oligocene climate warming

Main controlling factors and movability evaluation of continental shale oil

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