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为采用蒙特卡罗分子模拟方法模拟页岩对甲烷的吸附特性,需根据页岩气的吸附微观物理模型确定影响吸附特性的宏观因素,将宏观参数进行微观化处理。研究表明:页岩对甲烷的吸附量主要取决于孔隙的吸附面积和甲烷的分子密度;页岩吸附与储集空间以纳米级微孔为主,等温吸附模拟实验表明狭缝孔模型适合理想化描述甲烷分子的吸附状态。
In order to simulate the methane adsorption characteristics of shale by Monte Carlo method, macroscopic factors affecting the adsorption properties should be determined according to the micro-physical model of adsorption of shale gas, and the macroscopic parameters should be treated microscopically. The results show that the amount of methane adsorbed by shale mainly depends on pore adsorption area and methane molecular density. The adsorption and storage space of shale are dominated by nano-scale micropores. The isothermal adsorption simulation results show that the model is suitable for idealization Describe the adsorption state of methane molecules.