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对中国几个主要煤层气试验区山西柳林、河北大城和安徽淮南等地的煤层气产率、含气量、煤层气地质特征等进行了比较研究，并讨论了影响煤层气富集的因素。结果认为，满足以下条件的地区有利于煤层气富集与保存：①含煤岩系发育，构造简单，保存完整；②煤层厚度大；③煤岩类型为光亮、半亮煤；④煤层割理间距小、密度大；⑤变质程度达气肥煤、焦煤；⑥盖层条件好。

CORRELATION OF GEOLOGIC FEATURES OF THE PRINCIPAL COAL-BED GAS EXPERIMENT AREAS IN CHINA

??Through the correlation and research on the gas productivity gas content and coal-bed gas' geologic features in the strata at several principal coal-bed gas experiment areas in China,such as Liulin(Shanxi),Dacheng (Hebei)and Huainan(Anhui),etc.,and in light of a discussion on the factors affecting coal-bed gas accumulation,it is considered that these areas where can meet the following conditions are beneficial for coal-bed gas accumulation and preservation,i.e.?? coal-bearing rock series is grown and structure is simple and completely preserved;?? the thickness of coal bed is large;??lithotype is belonged to bright coal and semibright coal;?? the cleats in coal bed are of small space and high density;?? metamorphic grade is up to gas-fat coal and coking coal;and ?? cap-rock is of good sealing property.