Numerical Simulation of Low-Permeability Reservoirs with considering the Dynamic Boundary Layer Effect

Surface active components, salt component, and polar molecules in the fluid may adsorb on solid surface form boundary layer during low-speed flow a porous medium, which will influence flowing law medium. Previous studies low-permeability reservoirs mainly focus effects of threshold pressure gradient. But few them have considered time-varying effect thickness solving numerical simulation. The correlation among gradient was established by regressing experimental data versus pressure. On this basis, mathematical model oil-water two-phase involves constructed, comparative analysis development is performed. Results demonstrated that sensitive to throat radius gradient, decreases dynamically with increase displacement velocity accumulative oil production decrease when comparing without effect. Meanwhile, accelerates breakthrough water. With reduction difference, difference between increases, indicate dynamic intensified.