煤层气藏的不均一性远比常规天然气藏明显。其源于煤储层岩石物理成分的极不均一、煤储层中孔隙系统的不均一以及外部封闭保存条件的改变。煤层气藏的普遍不均一性对煤层气勘探选区的评价有明显的影响 ,也会影响到勘探井网的优化部署。煤体几何形态、夹矸分布及煤相分析 ,不同煤相的煤储层孔裂隙系统分析 ,煤层气藏外部封闭分析等均为煤层气藏不均一性分析的重要内容。 The heterogeneity of coalbed methane reservoirs is much more significant than conventional gas reservoirs. It stems from the extremely inhomogeneous physical composition of rocks in coal reservoirs, the heterogeneity of pore systems in coal reservoirs and the change of external closed storage conditions. The general heterogeneity of coalbed methane reservoirs has a significant impact on the evaluation of coalbed methane exploration constituencies, and will also affect the optimal deployment of exploration well networks. Coal body geometry, coal gangue distribution and coal phase analysis, different coal facies coal reservoir pore and fracture system analysis, CBM outside the closed analysis are the main content of heterogeneity analysis of CBM reservoirs.