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

doi:10.3969/j.issn.1006-6535.2020.04.012

Abstract

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

CLC Number:

TE122.1

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.

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