Numerical Simulation Research on Seepage Mechanism in Pore-scale Deformable Porous Media

A better understanding of the seepage mechanism in the deformable porous media is beneficial to ensure the stability of the rock mass and the oil well. Multiscale simulation of transport in porous media requires microstructure models describing the pore-scale disorder system. This paper presents an effective method of constructing the finite model from the SEM image of Berea sandstone. Based on this pore-scale model and the Fluid-Solid coupling mathematical model derived from the Navier - Stokes equation according to the Arbitrary Lagrangian - Eulerian theory, a series of numerical analysis is accomplished in Ansys and CFX software to study on the variation tendency of the porosity and permeability of the Berea sandstone in the linear elastic stage when considering the confining pressure and pore pressure. Good agreement is obtained on both the finite model and the simulation result against benchmark experimental data.