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

作     者：ZHANG XianMin TONG DengKe 

作者机构：China University of PetroleumDongying 257061China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2008年第51卷第7期

页      面：968-974页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：the National High Tech Research and Development Program of China ("863" Project) (Grant No. 2006AA06Z236) the National Basic Research Program ("973" Project) (Grant No. 2002CB11708) 

主　　题：coalbed methane surface energy matrix shrinkage permeability numerical simulation 

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.