Abstract:

Characteristics are presented of two phase flow imbibition relative pemeability curves with low interfacial tension. It is found experimentally that at a given saturation nonwetting permeabilities for an unconsolidated porous medium (sand pack) are higher than the drainage permeabilities. The contrary happens for consolidated porous media—imbibition nonwetting permeabilbities are smaller than drainage ones. The ezperimental results obtained in this stud are consistent with those obtained by NAAR with high interfacial tension systems.