期刊
JOURNAL OF THERMAL SCIENCE
卷 28, 期 1, 页码 1-16出版社
SPRINGER
DOI: 10.1007/s11630-018-1053-9
关键词
shale gas; molecular simulation; adsorption; desorption; diffusion
资金
- National Natural Science Foundation of China [51676153, 51806178]
- 111 project [B16038]
- Fundamental Research Funds for the Central Universities [G2018KY0303]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51721004]
Shale gas is becoming an increasingly promising alternative energy resource because of its high efficiency and environment-friendly characteristic. The amount of adsorbed gas on the shale matrix surfaces and dissolved gas in the shale matrix bulk is the dominant factor in the long-term productivity of shale reservoir. Although experimental measurements have been extensively carried out to investigate the gas adsorption and diffusion properties in the shale matrix, they cannot provide the detailed information on the microscopic transport mechanism of shale gas during the gas production process. Molecular simulation can accurately visualize the gas adsorption/desorption and diffusion processes in the shale matrix. In the present study, the recent research advances of molecular simulation on gas adsorption/desorption and diffusion in the shale matrix are reviewed. Firstly, the density functional theory (DFT) for shale gas molecule desorption/adsorption on the surface of the matrix crystal is illustrated. Then, the grand canonical Monte Carlo (GCMC) method predicting the amount of shale gas desorption/adsorption in the shale matrix crystal is introduced. Finally, molecular dynamics simulation (MD) for gas diffusion in the shale matrix is elucidated. Further developments of the molecular simulation method in shale gas production are also discussed.
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