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以IS-100等温吸附解吸仪和MTS815型电液伺服岩石实验系统为主要实验平台,选取了煤层气勘探开发热点地区——沁水盆地南部主力煤储层样品,开展了系统的注水煤样、平衡水煤样、干煤样等温吸附实验对比研究,探索并建立了模拟储层条件下的煤样注水和注水试样等温吸附实验方法,总结了实验规律,探讨了液态水影响煤吸附甲烷的作用机理．实验研究结果表明：注水煤样与平衡水煤样、干煤样比较,注水煤样的Langmuir体积明显高于平衡水煤样,也高于干燥煤样或与之相当；注水煤样的Langmuir压力最大,其次为平衡水煤样,干煤样的Langmuir压力最低,模拟储层条件下注水煤样的实验结果较平衡水煤样、干煤样更能反映实际情况；储层条件下煤层中的液态水对煤基质吸附气体存在显著影响,液态水可以使煤基质吸附气体的能力提升,吸附规律更符合Langmuir模型；润湿煤基质吸附力的增大是注水煤样吸附气体能力强的主要原因．实验结果推翻了前人有关液态水不影响煤吸附气体的传统认识,将导致煤层气等温吸附吸附实验方法的改进和煤层气资源评价可靠性的提高．
Taking IS-100 isothermal adsorption and desorption apparatus and MTS815-type electro-hydraulic servo rock experimental system as the main experimental platform, a sample of the main coal reservoirs in southern Qinshui Basin, a hot spot of CBM exploration and development, was selected. Equilibrium water coal sample and dry coal sample isotherm adsorption experimental comparison research, and explored and established the isothermal adsorption experiment method of coal sample injection and water injection sample under simulated reservoir conditions, summarized the experimental rules and discussed the effect of liquid water on coal adsorption methane Mechanism of action. The experimental results show that the Langmuir volume of waterflooding coal samples is significantly higher than that of balanced water samples and that of dry coal samples compared with that of water samples and dry coal samples. The Langmuir pressure of waterflooding coal samples And the Langmuir pressure of the dry coal samples is the lowest. The experimental results of the water injection coal samples under the simulated reservoir conditions are more representative of the actual conditions than those of the balanced water coal samples. In the coal seams under reservoir conditions Liquid water has a significant effect on the adsorbed gas of coal matrix. Liquid water can enhance the ability of coal matrix to adsorb gas, and the adsorption law is more in line with the Langmuir model. The increase of adsorbability of wet coal matrix is the main reason . The experimental results have overturned the traditional understanding that liquid water does not affect the gas adsorbed by coal, which will lead to the improvement of experimental methods for the isothermal adsorption and adsorption of coalbed methane and the improvement of the reliability of coalbed methane resource assessment.