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.