用多元气体等温吸附成果评价煤层气开发潜力

Exploitation Potential Evaluation to Coalbed Methane Base on Multi-Component Gas Adsorption Isotherms

针对煤层气中通常含有一定数量非 CH4气体的现实情况 ,进行了纯 N2 、纯 CH4和 CH4- N2二元气体等温吸附实验的对比研究 ,分析了煤层气中的 N2 组分对煤层 CH4吸附性能的影响 .结果表明 ,用纯 CH4气体的等温吸附资料进行煤层气开发潜力的评价 ,可能会产生不完全正确的结论 ;而多元气体的等温吸附曲线 ,可用于进行煤层气开发潜力的正确评价 .

Aiming at the problem that the coalbed gas usually contains some non CH 4 gases, the comparison of isotherm adsorption experiment using pure CH 4 with that using binary component gas (CH 4 N 2) was carried out. The influence of component N 2 in coalbed methane on adsorption was analyzed. The result shows that the evaluation using the isotherm adsorption data obtained from a pure N 2 may lead to an incorrect result; While the binary gas isotherm adsorption data can be used to evaluate correctly the exploitation potential of coalbed gas .