Accumulation Effects and Coupling Relationship of Deep Coalbed Methane
详细信息
- 责任者：Qin Yong (Key Laboratory of Coalbed Methane Resources & Reservoiring Process ; Ministry of Education ; China University of Mining & Technology ; Xuzhou 221116 ; China) ; Shen Jian
- 刊名：Acta Petrolei Sinica
- 出版年：2012
- 卷期：33(1)
- 关键词：煤层气 ; coalbed gas ; 深层气 ; deep gas
- 页码：p.48-54
- 图表：6 illus., 1 table, 21 refs.
- 分类号：1003
- issnNo：ISSN0253-2697
- isbnNo：CN11-2128/TE
摘要
This paper analyzed geological conditions and basic principles of deep coalbed methane (CBM) reservoirs and discussed the specificity of deep CBM-accumulation effects in three respects.The results show that the critical depth for deep geo-stress state transition is related to the maximum horizontal principal stress,which affects the permeability of deep coal reservoirs in various degrees.The negative effect of deep geothermal field on coal adsorptivity is greater than the positive effect of formation pressure,resulting also in a critical depth for deep CBM content,and the deep CBM content can not be simply predicted using the shallow CBM content gradient.