韩城矿区11号煤层气储层物性及特征分析

Analysis of Physical Properties and Characteristics of No.11 Coalbed Methane Reservoir in Hancheng Mining Area

采用煤层气地质理论对韩城矿区内11号煤层气储层物性及特征进行了分析。研究得到:煤层中-厚、稳定可采且围岩致密低渗;煤中微孔和过渡孔较发育,吸附和储集甲烷空间良好;宏观裂隙以小型和微型为主,面割理、端割理均发育较密;煤层渗透率整体较高且具有一定分异现象;煤层地处甲烷带且含气量较高;煤储层压力状态以超压为主。

The CBM geology theory is used to analyze the physical properties and characteristics of No.11 the coalbed methane reservoir in Hancheng mining area. The research results show that coal seam is medium-thickness, stable and recoverable, and the surrounding rock is compact and low permeability. Microporous and transitional pores in coal are well developed, with good adsorption and storage of methane space. The macroscopic fractures are mainly small and micro-scale, and the surface cleats and end cleats are all densely developed. Coal seam permeability is overall higher and has a certain degree of differentiation. The coal seam is located in the methane zone and has a high gas content. The pressure of coal reservoir is mainly overpressure.