Special Oil & Gas Reservoirs >

2020 , Vol. 27 >Issue 4: 79 - 84

DOI: https://doi.org/10.3969/j.issn.1006-6535.2020.04.012

Reservoir Engineering

Microscopic Adsorption Mechanism Difference in the Mineral Pore of Shale Gas Reservoir

  • Xu Chenxi ,
  • Xue Haitao ,
  • Li Bohong ,
  • Lu Shuangfang ,
  • Zhang Jian ,
  • Chen Guohui ,
  • Wang Shuai
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  • 1. Water Conservancy Survey and Design Institute,Jinan,Shandong 250014, China;
    2. China University of Petroleum (East China), Qingdao, Shandong 266580, China;
    3. China Petroleum Logging Co. Ltd.,Xi'an, Shaanxi 710000, China;
    4. Hubei Geological Bureau, Xiaogan, Hubei 432000, China;
    5. China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China

Received date: 2019-11-26

  Revised date: 2020-04-15

  Online published: 2022-02-18

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Abstract

The giant regular Monte Carlo molecular simulation method (GCMC) was used to study the microscopic adsorption mechanism difference for the shale gas in different mineral pores. Material Studio software was adopted to simulate the occurrences of shale gas in three mineral pore categories (kerogen, clay mineral, quartz) and explore the adsorption mechanism of shale gas in different mineral pore categories. Research indicates that the mineral adsorption capacity from high to low is kerogen, clay mineral and quartz. The great differences in adsorption capacity for organic matter, clay mineral and clastic mineral mainly result from the change of adsorption site (distribution density and adsorption intensity of adsorbate gas) on various mineral surfaces. An integral understanding of the adsorption mechanism differences for the shale gas in various mineral pore categories is favorable to the adsorbed gas content evaluation. This research could provide certain theoretical reference for the prediction of shale gas adsorption capacity in different regions.

Key words： mineral pore in shale gas reservoir; adsorption mechanism; surface structure; binding energy; adsorption potential

Cite this article

Xu Chenxi , Xue Haitao , Li Bohong , Lu Shuangfang , Zhang Jian , Chen Guohui , Wang Shuai . Microscopic Adsorption Mechanism Difference in the Mineral Pore of Shale Gas Reservoir[J]. Special Oil & Gas Reservoirs, 2020 , 27(4) : 79 -84 . DOI: 10.3969/j.issn.1006-6535.2020.04.012

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