An improved multicomponent pseudopotential lattice Boltzmann method for immiscible fluid displacement in porous media

Immiscible fluid displacement in porous media occurs several natural and industrial processes. For example, during petroleum extraction from rock reservoirs, water is used to displace oil. In this paper, we investigate the primary drainage imbibition a heterogeneous medium using an improved numerical model based on multicomponent pseudopotential lattice Boltzmann method. We apply recent developments literature develop new pressure boundary conditions. show that proposed able simulate realistic viscosity ratios, it allows independent tuning of surface tension viscosity. Moreover, suppresses nonphysical behavior previous schemes, which trapped volumes significantly change with time. Furthermore, developed correctly captures underlying physical phenomena displacements. oil–water flows verify measured values irreducible residual oil saturations are realistic. Finally, vary wetting conditions represent different wettability states. scenarios, simulations good agreement experimental results.