Hou D.,Chengdu University of Technology |
Zhang H.,Chengdu University of Technology |
Li G.,Cainan Block of Xinjiang Oilfield Co.
Chemistry and Technology of Fuels and Oils | Year: 2015
The permeability sensitivity of formation is one of the primary causes of damage to low-permeability reservoir. Experiments were conducted on change in pressure propagation characteristics with reference to matrix rock (core) samples taken from a low-permeability reservoir in Changqing oilfield, China. Based on the experimental results, pressure propagation values were obtained using CMG numerical simulation software that takes account of permeability sensitivity of the formation. The experimental and simulation results indicate that gas well productivity in lowpermeability gas reservoir cannot be increased significantly by increasing pressure difference in low-permeability gas reservoir. With increase of permeability sensitivity of formation stressed state the pressure propagation coefficient decreases, pressure propagation delay increases, and steady gas production time becomes shorter with higher gas flow rate. © ?2015 Springer Science+Business Media New York.