Geological Characteristics of Coalbed Methane and Controlling Factors of Accumulation in the Tuha Coal Basin

• 责任者：Liu Honglin (China University of Geology ; Beijing 100083 ; China) ; Wang Hongyan
• 刊名：Acta Geologica Sinica
• 出版年：2010
• 卷期：84(1)
• 关键词：煤层气 ; coalbed gas ; 成藏模式 ; pool-formed model ; 吐哈盆地 ; Tu-Ha Basin
• 页码：p.133-137
• 图表：2 illus., 9 refs.
• 分类号：1003
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

China is abundant in low-rank coalbed methane resources, with a total reserve of over 15.13 trillion cubic meters. Based on the conditions and characteristics of coalbed gas reservoirs in the Tuha Basin, this study discussed the geological structures, coal accumulation, coal series features, biogenic gas preservation, etc; determined the type of coalbed methane reservoir in the Tuha Basin and distribution pattern; and finally divided the coalbed gas into three types: basin depression reservoir, basin margin steep and mild slope reservoir. Matching characteristics of reservoir formation suggests two reservoir types for low rank coalbed gas: reservoir forming-dissipation and forming-migration-dissipation, which will be useful for guiding the research of low rank coalbed methane genesis and exploration of the coalbed methane.