Study of the Effect of Porous Medium Deformation on the Filtration Characteristics of an Oil Reservoir

This study investigates the impact of oil reservoir skeleton deformation on the main filtration and hydrodynamic characteristics during multiphase fluid flow. To describe the process, a mathematical model was used that accounts for changes in the pressure, porosity, and absolute permeability of the deformable porous medium. The numerical solution of the system of equations was performed using the large particle method. The spatio-temporal changes in the reservoir parameters were analyzed for various values of the skeleton compressibility coefficient and distances between production wells. It was established that a decrease in reservoir pressure leads to the deformation of the pore space and a reduction in porosity and permeability. It was shown that as the compressibility coefficient increases, the deformation effects intensify, and as the distance between production wells decreases, their hydrodynamic interaction increases, which accelerates the changes in the filtration characteristics in the inter-well region. The obtained results confirm the necessity of accounting for the deformability of the porous medium when modeling oil field development.