在分析构造及热演化史基础上，探讨了沁水盆地西山煤田中煤阶煤层气的储层物性和成藏过程，结果表明，西山地区煤层具有吸附量大、含气量高、含气饱和度大、资源量大和资源度高等特点；虽然成藏过程较为复杂，但煤层埋藏史与生烃史配置良好，有利于煤层气富集保存，又由于发育有由岩浆诱发成因的煤层构造裂隙而使储层渗透率提高。认为该地区具有良好的煤层气勘探潜力和开发前景。

Based on the analysis of tectonic and thermal histories, the physical properties and reservoir forming process of the high rank coalbed methane (CBM) in the Xi

Shan area are discussed. In general, the coal seam in the XiShan area has its own characteristics, and the adsorption, gas content, saturation, resources and abundance are high. Though the reservoir forming process is complex, the accumulating and preservation condition are good. Furthermore, the tectonic cleats caused by magmation promote the permeability. It is the most favorable area for CBM exploration and development.