Pore-scale modeling of oil mobilization trapped in a square cavity

In this work, water is injected to displace oil from a micro square cavity. Fluids are incompressible, Newtonian and immiscible. The governing equations of the two-phase, transient, laminar, isothermal flow problem are solved numerically using Ansys Fluent software coupled with volume of fluid technique and appropriated numerical parameters. The qualitative and quantitative results are obtained following the volumetric oil fraction along the spatial domain and time. The methodology proposed allows a correct description of the oil displacement process, demonstrating its complexity and dependence of physical parameters. Oil recovery factor is higher when interfacial tension is low and water is the wetting fluid.