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黄 涛,刘德华,孙 敬. 黏土矿物微观孔隙对甲烷吸附行为的分子模拟[J]. 科学技术与工程, 2020, 20(1): 141-145.
Huang Tao,Sun Jing.Molecular Simulation on the Adsorption behaviors of Methane in Clay Minerals Micro-pore[J].Science Technology and Engineering,2020,20(1):141-145.
黏土矿物微观孔隙对甲烷吸附行为的分子模拟
Molecular Simulation on the Adsorption behaviors of Methane in Clay Minerals Micro-pore
投稿时间:2019-04-18  修订日期:2019-09-20
DOI:
中文关键词:  
英文关键词:clay  minerals CH4 adsorption molecular simulation
基金项目:
        
作者单位
黄 涛 Petroleum Engineering College,Yangtze University
刘德华 长江大学石油工程学院
孙 敬 长江大学石油工程学院
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中文摘要:
      
英文摘要:
      In order to study the adsorption rule of clay minerals for CH4 and the minimum reservoir space limit of shale reservoir for CH4, three molecular models including illite, montmorillonite and kaolinite were established by using Material Studio software, the Monte Carlo and molecular dynamics method were used for studying the adsorption of CH4 at different aperture spaces and different pressures in the three kinds of clay minerals.The results show that with the increasing of pore size and pressure,the adsorption capacity of CH4 gas between three clay mineral layers increases gradually. The minimum reservoir space of non-aqueous clay minerals for CH4 is 0.4 nm.The relationship between the adsorption capacity of three clay minerals varies with the pore size. With the decreasing of pore size or the increasing of pressure, the adsorption of CH4 gas in the pore size of three clay minerals becomes more stable.With the increasing of pore size, multi-layer adsorption of CH4 appears in the clay minerals.The distance between CH4 molecules adsorbed in the three clay minerals is greater than 0.075 nm,and another CH4 molecule is most likely to appear at 0.125 nm away from CH4 molecule. The research results play an important role in understanding the occurrence characteristics and seepage law of shale gas.
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