Two-phase relative permeability models in reservoir engineering calculations

A comparison of ten two-phase relative permeability models is conducted usi ng experimental, semianalytical and numerical approaches. Model predicted r elative permeabilities are compared with data from 12 steady-state experime nts on Berea and Brown sandstones using combinations of three white mineral oils and 2% CaCl2 brine. The model results are compared against the experi mental data using three different criteria. The models; are found to predic t the relative permeability to oil, relative permeability to water and frac tional flow of water with varying degrees of success. Relative permeability data from four of the experimental runs are used to predict the displaceme nt performance under Buckley-Leverett conditions and the results are compar ed against those predicted by the models. Finally, waterflooding performanc es predicted by the models are analyzed at three different viscosity ratios using a two-dimensional, two-phase numerical reservoir simulator.