Abstract
Due to the complexity of the three-phase relative permeability experiments, most of the engineers rely on the theoretical models to predict three phase oil relative permeability. In this paper, the three-phase oil relative permeability models that are commonly used for dealing with multiphase flow in porous media are reviewed. Comparison studies between the models and observed experimental oil relative permeability data published in the literature are also reviewed. In general, most of the published models were not capable of producing a good match with the experimental data, and henceforth, more work is required in this area with particular attention to
the experimental data needed to verify the theoretical models.