【摘要】 论述了我国开采煤层气目前存在的问题 ,并且通过煤对二氧化碳 ( CO2 )、甲烷 ( CH4)、氮气 ( N2 )吸附机理的分析 ,提出注入二氧化碳 ( CO2 )或氮气 ( N2 )提高煤层气采收率技术的可行性。并从其注气驱替煤层气的作用机理的不同 ,从理论上和实验中得出注入二氧化碳 ( CO2 )的效果要优于氮气 ( N2 )更多还原

【Abstract】 The current main problems of exploiting coal-bed methane in our country are stated and the technique of injecting carbon dioxide or nitrogen to make methane adsorbed flow from coal seams to enhance reclaim rate of coal-bed methane is pointed out based on the analysis of the adsorption mechanism of coal to different gases ,including carbon dioxide,methane or nitrogen.And then on theories and through experiments the authors conclude that function of carbon dioxide injecting is better than that of nitrogen on the basis of different mechanism of injecting different gases to make methane adsorbed flow.更多还原