SANDSTONE AND CARBONATE TWO-AND THREE- PHASE RELATIVE PERMEABILITY CHARACTERISTICS

Abstract

Three-phase relative permeability characteristics applicable to various oil displacement processes in the reservoir such as combustion and alternate gas-water injection were determined on both outcrop and reservoir core samples. Steady-state and nonsteady-state tests were performed on a variety of sandstone and carbonate core samples having different w%etting properties. Results of investigation were presented and discussed. Paper concludes that despite the importance of wettability the present datahow that for both water-wet and oil- wet systems oil recovery can be improved by several different injection processes, but the additional oil recovery is accompanied by a lower fluid mobility.