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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(1): 50-57
Lin Xiaoyun, Wei Minsheng, Feng Yong, Li Lu, Han Yan. Key moments for hydrocarbon accumulation in Shaximiao Formation on the eastern slope of West Sichuan Depression, Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 50-57. doi: 10.11781/sysydz201701050
Citation: Lin Xiaoyun, Wei Minsheng, Feng Yong, Li Lu, Han Yan. Key moments for hydrocarbon accumulation in Shaximiao Formation on the eastern slope of West Sichuan Depression, Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 50-57. doi: 10.11781/sysydz201701050
shu

Key moments for hydrocarbon accumulation in Shaximiao Formation on the eastern slope of West Sichuan Depression, Sichuan Basin

doi: 10.11781/sysydz201701050
  • 1.

    Key Laboratory of Exploration Technologies for Oil and Gas Resources of Ministry of Education, Yangtze University, Wuhan, Hubei 430100, China

  • 2. College of Geosciences, Yangtze University, Wuhan, Hubei 430100, China

  • 3. Second Factory of Oil Production, Dagang Oilfield Company of CNPY, Tianjin 061103, China

  • Received Date: 2016-07-01
  • Rev Recd Date: 2016-12-12
  • Publish Date: 2017-01-28
    Abstract
  • The West Sichuan Depression in the Sichuan Basin is a foreland basin formed under the compressional thrusting of the Longmen Mountain. 3D seismic was obtained on five exploration blocks on the eastern slope of the central depression, including Hexingchang-Gaomiaozi, Fenggu, Yongtai, Zhongjiang-Huilong and Zhixinchang-Shiquanchang, covering three tectonic belts. The hydrocarbon evolution history of source rocks was studied, and 22 fluid inclusion samples from 6 wells were analyzed using fluorescence, homogenization temperature and salinity measurements. Source rocks in the fifth member of the Upper Triassic Xujiahe Formation entered the hydrocarbon generation threshold at 151-145 Ma, and reached a peak at 130 Ma. Three stages of fluid activities related to hydrocarbon accumulation took place in sandstone reservoirs in the Jurassic Shaximiao Formation at 141-128 Ma (J3-K1), 105-88 Ma (K1-K2) and 83-68 Ma (K2), respectively. The peak of hydrocarbon generation of source rocks at 130-68 Ma (K1-K2) is the key moment for hydrocarbon accumulation.

     

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