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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
Citation: 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
shu

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
  • 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.

     

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