Near-Wellbore Field Water/Oil Relative Permeability Inferred from Production with Increasing Water Cut

Abstract Oil and water relative permeability data and values of relevant displacement and petrophysical parameters are determined directly at actual in-situ conditions from the oil and water production history of wells. This is accomplished using the convenient interpretation formulae derived for radial unsteady-state two-phase immiscible fluid displacement in the near wellbore formation. The application of the new methodology is demonstrated by processing the typical literature and oil-field production well data. This approach provides a more accurate estimation of the water-oil relative permeability around the production wells than those obtained from the laboratory immiscible flow tests conducted using reservoir core and fluid samples.