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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2019  >  41(1): 149-156
MA Haiyang, XIA Zunyi, WEN Qingzhi, ZHANG Pengyu. Micro-pore characteristics of shale in Zhanhua Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(1): 149-156. doi: 10.11781/sysydz201901149
Citation: MA Haiyang, XIA Zunyi, WEN Qingzhi, ZHANG Pengyu. Micro-pore characteristics of shale in Zhanhua Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(1): 149-156. doi: 10.11781/sysydz201901149
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Micro-pore characteristics of shale in Zhanhua Sag, Bohai Bay Basin

doi: 10.11781/sysydz201901149

  • 1. School of Petroleum Engineering, China University of Petroleum(East China), Qingdao, Shandong 266580, China;

  • 2. College of Engineering, Peking University, Beijing 100871, China;

  • 3. Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, Beijing 100871, China

  • Received Date: 2018-09-19
  • Rev Recd Date: 2018-12-06
  • Publish Date: 2019-01-28
    Abstract
  • The micro-pore structure of shale is a key contol of shale oil and gas accumulation and seepage. The micro-pore structure of the continental shale in the Shahejie Formation in the Zhanhua Sag was analyzed by using argon-ion polishing SEM, CO2 adsorption, N2 adsorption, MIP and NMR. The shale displays six kinds of pores, including organic, intergranular, intragranular, intercrystalline, dissolution pores and micro-cracks. Micropores, mesopores and macropores are all developed. The micropore specific surface area accounts for about 61.52% of the total specific surface area, providing the main space for shale oil and gas adsorption. The mesopores and macropores provide most pore volume, accounting for 49.99% and 41.19%, respectively, which play a major role in the storage and migration of shale oil and gas. The shale porosity is 4.08%-7.04% and the effective porosity is 0.11%-0.64%, which means that pore connectivity is poor.

     

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