Displacement of oil by solvent at high water saturation

Abstract

Results are presented of miscible displacement experiments conducted at high water saturations in long, consolidated sandstone cores and in stacked plugs of actual reservoir rock. Evidence is given to support the hypothesis that much of the bypassed or stagnant oil is in communication with the flowing solvent by diffusion, and that recovery of part of this stagnant oil by diffusion is possible with light hydrocarbon solvents that would be used in the field.