An Improved Relative Permeability Model to Match Displacement Experiments
Mohammed Idrees Al-Mossawy, Birol Demiral

Abstract
In petroleum industry due to existence of gas and liquid phases in hydrocarbon reservoirs, the relative permeability data are essential to the reservoir simulation. The relative permeability test can be conducted either by the steady-state flow method or the unsteady-state flow method. The present model is derived for the unsteady-state displacement method. It considers effects of fluids viscosities and the average saturation at the breakthrough moment in addition to the parameters considered by previous models. First a preliminary model was derived from a function of porosity and permeability called poroperm. Then the fractional flow theory was used to improve the preliminary model to match the actual displacement process. The improved model was implemented on experimental data of seven Berea sandstone cores. Comparison of results with three models showed that the present model is the perfect.

Full Text: PDF