Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins

Tao Chongzhi; Yin Jinyin; Lu Hongmei; Wang Yifan; Liu Junlan; Niu Xinjie

doi:10.11781/sysydz201505614

Volume 37 Issue 5

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Article Navigation > PETROLEUM GEOLOGY & EXPERIMENT > 2015 > 37(5): 614-618

Tao Chongzhi, Yin Jinyin, Lu Hongmei, Wang Yifan, Liu Junlan, Niu Xinjie. Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(5): 614-618. doi: 10.11781/sysydz201505614

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Tao Chongzhi, Yin Jinyin, Lu Hongmei, Wang Yifan, Liu Junlan, Niu Xinjie. Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(5): 614-618. doi: 10.11781/sysydz201505614

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Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins

doi: 10.11781/sysydz201505614

1.
SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China
2. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China
3. Exploration and Development Research Institute, PetroChina Huabei Oilfield Company, Renqiu, Hebei 062550, China

Received Date: 2015-03-16
Rev Recd Date: 2015-08-03
Publish Date: 2015-09-28

Abstract

Abstract

South Atlantic passive margin basins experienced a similar tectonic evolution and regionally distributed salt was deposited during the Aptian.Based on a comprehensive study of regional tectonics, depositional environment and hydrocarbon accumulation, integrated with the study of salt-related structural styles determined by analyzing regional seismic sections, three tectonic belts, which include extensional domain, transitional domain and compressional domain, were recognized in the 6 main salt basins.The pre-salt source rocks in the Brazil salt basins are still in the oil window.In West Africa, the post-salt source rocks experienced a higher maturation rate than the pre-salt source rocks.The salt has a relatively higher thermal conductivity and can restrain the hydrocarbon generation of the pre-salt source rocks but accelerate that of the post-salt source rocks.The salt flow resulted in several kinds of salt-related structural traps for hydrocarbon accumulation in the post-salt sequences.Reserves in the post-salt related structural traps account for 84.8% of the total post-salt reserves.The salt windows developed in the extensional domain served as hydrocarbon migration pathways and controlled hydrocarbon accumulations in the post-salt sequence.The thick salt provided a regional cap rock, which controlled the pre-salt hydrocarbon accumulations in the transitional-compressional domain.
- salt,
- hydrocarbon accumulation,
- tectonic belt,
- passive continental margin,
- South Atlantic

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沈阳化工大学材料科学与工程学院沈阳 110142

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Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins

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Impact of salt on hydrocarbon accumulation in South Atlantic passive margin basins

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