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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2014  >  36(1): 64-69
Yang Caihong, Zeng Guangdong, Li Shangqing, Liang Ruobing. Fault development characteristics and hydrocarbon accumulation in Pingbei area of Xihu Sag, East China Sea[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 64-69. doi: 10.11781/sysydz201401064
Citation: Yang Caihong, Zeng Guangdong, Li Shangqing, Liang Ruobing. Fault development characteristics and hydrocarbon accumulation in Pingbei area of Xihu Sag, East China Sea[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 64-69. doi: 10.11781/sysydz201401064
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Fault development characteristics and hydrocarbon accumulation in Pingbei area of Xihu Sag, East China Sea

doi: 10.11781/sysydz201401064

  • SINOPEC Shanghai Offshore Petroleum Company, Shanghai 200120, China

  • Received Date: 2013-09-10
  • Rev Recd Date: 2013-12-10
  • Publish Date: 2014-01-28
    Abstract
  • In the Pingbei area of the Xihu Sag in the East China Sea, faults are well-developed, and traps are mainly complex blocks. The generation stage, open/close and combination style of faults directly affect the migration, accumulation and enrichment of oil and gas. The faults in the study area can be classified into 3 types: peak-flourishing, early-flourishing and mid-flourishing. The active period of faults, the lithologic configuration at both sides of the faults and shale smear are the key elements influencing fault sealing. The faults of early-flourishing type in the Pinghu Formation boast the best sealing while those of the peak-flourishing type in the Pinghu-Huagang Formations are relatively worse. There are obvious differences in the degree of hydrocarbon accumulation between various combinations of faults. The combinations of cis-dipping faults show the highest degree of hydrocarbon accumulation; the combinations of anti-dipping faults show the lower degree of hydrocarbon accumulation; the combinations of both cis-dipping and anti-dipping faults show the middle level of hydrocarbon accumulation.

     

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