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以滇东地区煤田和煤层气勘探阶段积累的以往资料为基础,系统分析了煤层气藏的含煤性、资源量、物化特征、空间分布、煤层气成分分布以及煤层气藏成藏过程等。指出区内含煤层系为上二叠统龙潭组,为一复式背、向斜构造聚煤盆地,区内煤系发育,煤演化程度处于成熟———过成熟阶段;煤层含气量主要受控于煤岩的沉积环境、煤演化程度、埋藏深度等条件,使煤层储气能力随着煤阶的增高和埋深的增加而增高。
Based on the historical data accumulated in coalfields and CBM exploration in East Yunnan, the paper systematically analyzes the coal-bearing property, resources, physical and chemical characteristics, spatial distribution, coalbed methane composition distribution and the process of CBM reservoir formation. It is pointed out that the coal seams in the area are the Upper Permian Longtan Formation, which is a complex coal-bearing basin with back-syncline and syncline structure. The coal measure developed in this area, and the degree of coal evolution is in the maturity-mature stage. The gas content in the coal seam is mainly controlled The sedimentary environment of coal and rock, the degree of coal evolution and the burial depth make the coal-bed gas storage capacity increase with the increase of coal rank and the increase of burial depth.