The influence of tectonic evolution on the accumulation and enrichment of coalbed methane (CBM)  

作　　者：SONG Yan ZHAO Mengjun LIU Shaobo WANG Hongyan CHEN Zhenhong 

机构地区：[1]PetroChina Exploration and Development Research Institute,Beijing 100083,China [2]School of Earth Sciences,Yangtze University,Jingzhou 434023,China [3]Langfang Branch,PetroChina Exploration and Development Research Institute,Langfang 065007,China

出　　处：《Chinese Science Bulletin》2005年第S1期1-6,共6页

摘　　要：The current accumulation and enrichment of CBM reservoir is a result of the preservation and destruction of former CBM, after the superposing evolution of reversing-and-uplifting and the subsequent evolution within the coal-bearing basin. The critical moment of the CBM reservoir formation is the time when the burying depth of the overlying net thickness amounts to the least in geological history after the gas generation of coal beds. Except the coal-bearing basins of lower metamorphism, most basins suffered the evolution stage of reversion and uplift. The formation of the CBM reservoir is controlled by the beginning and lasting time, and the intensity of reversing and uplifting. The tectonic evolution after reversing and uplifting also affects the accumulation of CBM in coal-bearing basin. The CBM constantly dissipates in the area of chronically uplifting and de-nudating. The area developed overlying sedimentation is advantageous to the preservation of CBM, but also can lead to the reduction of CBM saturation.The current accumulation and enrichment of CBM reservoir is a result of the preservation and destruction of former CBM, after the superposing evolution of reversingand-uplifting and the subsequent evolution within the coalbearing basin. The critical moment of the CBM reservoir formation is the time when the burying depth of the overlying net thickness amounts to the least in geological history after the gas generation of coal beds. Except the coal-bearing basins of lower metamorphism, most basins suffered the evolution stage of reversion and uplift. The formation of the CBM reservoir is controlled by the beginning and lasting time, and the intensity of reversing and uplifting. The tectonic evolution after reversing and uplifting also affects the accumulation of CBM in coal-bearing basin. The CBM constantly dissipates in the area of chronically uplifting and denudating. The area developed overlying sedimentation is advantageous to the preservation of CBM, but also can lead to the reduction of CBM saturation.

关 键 词：CBM TECTONIC evolution ACCUMULATION and ENRICHMENT UPLIFT pattern. 

分 类 号：P618.13[天文地球—矿床学]