Journal
ACTA GEOLOGICA SINICA-ENGLISH EDITION
Volume 84, Issue 6, Pages 1539-1546Publisher
WILEY
DOI: 10.1111/j.1755-6724.2010.00346.x
Keywords
coalbed methane reservoir; mechanism; structure; hydrodynamic; model
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Funding
- project of China National 973 Program Basic Research on Enrichment Mechanism and Improving the Exploitation Efficiency of Coalbed Methane Reservoir [2009CB219600]
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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.
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