FLOW OF COAL GAS UNDER IN SITU HYDROMECHANICAL INTERACTIONS
A coupled model for solid deformation and gas flow in the coal seam is presented. The model considers various processes including the Klinkenberg effect of gas permeability, the absorption or desorption of gas (gas content) that depending on gas pressure, and porosity change due to Solid deformation. The model is implemented into, and solved by using COMSOL Multiphysics, a powerful PDE-based multiphysics modelling environment. The numerical model is validated by comparing simulated results with the available analytical solutions. Then, it is used to predict the gas migration in deformable coal seam. The numerical results indicate that both the Klinkenberg effect and mechanical process effect have a significant contribution to the gas flow in the coal seam. Without considering them, the gas pressure in the coal seam will be underestimated.
W C Zhu J Liu J C Sheng B H Brady
Center for Rock Instability and Seismicity Research, Northeastern University, Shenyang 110004, P.R.C School of Oil and Gas Engineering, The University of Western Australia, WA, Australia School of Oil and Gas Engineering, The University of Western Australia, WA, Australia Department of
国际会议
南京
英文
704-709
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）