The Study of Permeability Revolution in coal reservoir during methane production

摘要

Permeability of coal is recognized as the most important parameter for fluid transport through the seams. A new finite element model is applied to quantify the gas flow, the deformation of matrix and the net change of permeability. After plenty of study of the permeability, the revolution of the permeability based on the pore pressure and the sorption-induced strain is built. The sorption which affects the volumetric strain is taken into consideration and the pore pressure is also been studied as a key factor for permeability and other relative parameters.