Comparison of relative permeability–saturation–capillary pressure models for simulation of reservoir CO2 injection

Constitutive relations between relative permeability (kr), fluid saturation (S), and capillary pressure (Pc) determine to a large extent the distribution of brine and supercritical CO2 (scCO2) during subsurface injection operations. Published numerical multiphase simulations for brine–scCO2 systems so far have primarily used four kr − S − Pc models. For the S − Pc relations, either the Brooks–Corey (BC) or Van Genuchten (VG) equations are used....