Numerical simulation of filtration of a water-gas-oil mixture in a porous medium under the acoustic influence

Abstract

The work is dedicated to the water-alternating-gas injection in oil reservoirs under the influence of a periodic acoustic field. The problem is solved numerically using the control volume method. The mathematical model includes the conservation equations describing the three-phase filtration of water with gas bubbles, oil, and free gas into an element of porous medium taking into account the growth of microbubbles, the formation of free gas, the fluid flow with slippage, the compressibility of a crack network, and the non-isothermal character of the process. Multiparametric calculations are conducted to obtain the dependence of the exposure duration, the residual effect, and amplitude of an acoustic field on the oil displacement. Numerical analysis showed that the acoustic field has a positive effect on the filtration properties of a fluid, which is important for developing the technology of oil recovery.