One primary goal of any enhanced recovery project is to maximize the ability of the fluids to flow through a porous medium (i. e. , the reservoir). This paper discusses the effect of capillary number, a dimensionless group describing the ratio of viscous to capillary forces, on two-phase (oil-water) relative permeability curves. Specifically, a series of steady-state relative permeability measurements were carried out to determine whether the capillary number causes changes in the two-phase permeabilities or whether one of its constituents, such as flow velocity, fluid viscosity, or interfacial tension (IFT), is the controlling variable. A relative permeability model was developed from the experimental data, based on fluid saturations, IFT, fluid viscosities, and the residual saturations, by using regression analysis. These models demonstrated similar or better fits with experimental data of other water- and oil-wet systems, when compared with existing relative permeability models.
All Science Journal Classification (ASJC) codes
- Fuel Technology
- Industrial relations
- Energy Engineering and Power Technology
- Strategy and Management