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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2016  >  38(4): 423-428
Xu Xuhui, Zheng Lunju, Ma Zhongliang. Organic matter occurrence and hydrocarbon generation in shale[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2016, 38(4): 423-428. doi: 10.11781/sysydz201604423
Citation: Xu Xuhui, Zheng Lunju, Ma Zhongliang. Organic matter occurrence and hydrocarbon generation in shale[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2016, 38(4): 423-428. doi: 10.11781/sysydz201604423
shu

Organic matter occurrence and hydrocarbon generation in shale

doi: 10.11781/sysydz201604423
  • 1.

    Wuxi Research Institute of Petroleum Geology, Wuxi, Jiangsu 214126, China

  • 2. SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

  • Received Date: 2016-03-15
  • Rev Recd Date: 2016-05-30
  • Publish Date: 2016-07-28
    Abstract
  • The microscopic features of various shales showed that sedimentary organic matter and minerals mainly exist as an "enriched organic matter and mineral aggregation" or "lean organic matter and mineral matrix". The simulations of hydrocarbon generation and expulsion in shale indicated that the difference of organic matter occurrence in shale controlled hydrocarbon generation and primary migration. Due to the heterogeneous distribution of "enriched organic matter and mineral aggregation", the hydrocarbon generated, expelled and preserved at different stages showed different occurrence and migration features. When maturity ranges from 0.6%-1.0% Ro, oil is free or absorbed in the "enriched organic matter and mineral aggregation". Poor liquidity restricts exploration potential. When Ro ranges from 1.0%-1.3%, it is more favorable for shale oil exploration. The content of "enriched organic matter and mineral aggregation" determined the gas potential in shale during the high evolution stage. In view of the heterogeneity of the microstructure of sedimentary organic matter and inorganic minerals in source rocks, the generation, expulsion and retention of oil and gas should be regarded as a united process when exploring for shale gas.

     

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