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为了深入研究注气置换煤层甲烷技术的机理,在对国内外注气置换煤层甲烷技术机理研究的基础上,得出了注气置换煤层甲烷技术的作用机理主要有5个方面,即注入气体置换作用机理、降低甲烷分压的作用机理、筛滤吸附置换作用机理、提高煤层甲烷扩散-渗流速度作用机理和压裂增透作用机理,并分析了在注气置换煤层甲烷技术机理研究方面存在的问题,探讨了该技术的研究方向。
In order to further study the mechanism of methane replacement by gas injection, based on the research on the mechanism of methane replacement by gas injection at home and abroad, it is concluded that the mechanism of methane injection by gas replacement is mainly composed of five aspects, that is, Mechanism, mechanism of action to reduce the partial pressure of methane, screening mechanism of adsorption and displacement, mechanism of methane diffusion and seepage velocity in coal seam and mechanism of fracturing and permeation enhancement, and the existing problems in the study of mechanism of methane replacement by gas injection , Explored the research direction of this technology.