非线性双重孔隙介质渗流

NON-LINEAR DUAL-POROSITY BEHAVIOUR OF NATURALLY FRACTURED RESERVOIRS

提出了一种考虑介质参数随压力变化的双重孔隙介质非线性渗流模型 ,给出了有限元计算格式 ,并给出了算例。

A dual porosity model based on the modified formulation by Barrenblatt is presented for simulation of naturally fractured reservoirs and many applications are described. However, the permeability and porosity coefficients in the control equations are regarded as constant in mosts of literatures. Of course, this is not true. The permeability and porosity are actually varied with pressures in matrix blocks and fissures. A non linear relation of dual prosity and pressure is developed and a finite element program is given to simulate the non linear dual porosity model.