收稿日期: 2010-09-26
修回日期: 2011-01-22
网络出版日期: 2011-08-10
基金资助
国家科技重大专项“深部煤层气开采运移规律及数值模拟研究”(编号:2008ZX050)资助.
Mathematical Model of Fluid-Solid Coupling Seepage in CBM Production
Received date: 2010-09-26
Revised date: 2011-01-22
Online published: 2011-08-10
邓广弘, 罗克勇, 马东民, 雷学武 . 煤层气储层流固耦合数学模型[J]. 天然气地球科学, 2011 , 22(4) : 723 -727 . DOI: 10.11764/j.issn.1672-1926.2011.04.723
Based on porous media and Terzaghi effective stress principle,we build the model of coal constitutive framework in the coal bed methane (CBM) production and interpret the stress deformation of coal matrix.We setup the dynamic model of the porosity and permeability so as to get the changes of the physical properties of coal seams during CBM production.The seeping equation of coal fluid is obtained based on hydromechanics continuity equation.Finally we present the mathematical model of single phase and multiphase fluid-solid coupling seepage in the CBM production by means of auxiliary equation and formed conditions.
Key words: CBM; Fluid-solid coupling; Effective stress principle; Stress field; Seepage field.
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