The coalbed methane transport model and its application in the presence of matrix shrinkage

被引：0
|
作者：
ZHANG XianMin & TONG DengKe China University of Petroleum
机构：
来源：
ScienceinChina(SeriesE:TechnologicalSciences) | 2008年 / 07期
关键词：
coalbed methane; surface energy; matrix shrinkage; permeability; numerical simulation;
D O I：
暂无
中图分类号：
TD844 [地下气化过程的控制和管理];
学科分类号：
081901 ;
摘要：
Based on the theories of surface physical chemistry, theoretical formulations for permeability and porosity are presented which include both stress effect and matrix shrinkage in a single equation. Then, a three-dimensional, dual porosity, nonequilibrium adsorption, pseudosteady state mathematical model for gas and water is established and solved by the fully implicit method and the block precondition- ing orthomin algorithm. A history matching for the Qinshui Well TL003 is done. From the results, it is shown that the obvious enhancement of permeability occurs along with the passing time but the reservoir pressure of 15# coal seam cannot fulfill the critical adsorption pressure as a result of the water recharge of the aquifer. Hence, it is suggested to plug the 15# coal seam.
引用
收藏
页码：968 / 974
页数：7
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