Abstract
In this work, Lattice Boltzmann (LB) method is utilized to numerically study the effect of pore geometry on non-wetting phase trapping in porous media. The porous media is constructed by randomly packing spheres into a specific domain. The radius and total amount of the packed spheres are varied to construct porous models with different porous structures. Using these models five simulations are carried out. The displacing process of non-wetting phase by wetting phase is observed and the final displacing results are discussed. Results show that increasing the radius and the total amount of spheres will reduce the pore throat resulting in larger residual non-wetting phase saturation. This implies that pore geometry has a strong effect on non-wetting phase trapping and small pore throat will be beneficial for trapping of non-wetting phase by capillary. This numerical work also demonstrates the effectiveness of LBM as a tool for simulation of immiscible two phase flow in porous media.
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