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《地质学报(英文版)》 2010-06
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Pool-Forming Stages and Enrichment Models of Medium- to High-Rank Coalbed Methane

SONG Yan~(1,2,*),ZHAO Mengjun~1,HONG Feng~1,LIU Shaobo~1, QIN Shengfei~1 and WANG Hongyan~3 1 Petroleum Geology Research and Laboratory Center,Research Institute of Petroleum Exploration and Development,CNPC,Beijing 100083,China 2 Yangtze University,Jingzhou,Hubei 434023,China 3 Langfang Branch of Research Institute of Petroleum Exploration and Development,CNPC,Langfang, Hebei 065007,China  
The pool-forming mechanism of coalbed methane has its own characteristics.In this paper, based on studies on the typical coal-bearing basins in China,it is pointed out that the reservoir formation of medium- to high-rank coalbed methane has experienced three critical stages:the coalbed methane generation and adsorption stage,the coalbed adsorption capacity enhancement stage,and the coalbed methane desorption-diffusion and preservation stage.The regional tectonic evolution, hydrodynamic conditions and sealing conditions play important roles in the stage of coalbed methane desorption-diffusion and preservation.Medium- to high-rank coalbed methane has three types of enrichment models,that is,the most favorable,the relatively favorable,and the unfavorable enrichment models.
【Fund】: supported by the project of China National 973 Program“Basic Research on Enrichment Mechanism and Improving the Exploitation Efficiency of Coalbed Methane Reservoir”(Grant No. 2009CB219600)
【CateGory Index】: P618.11
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