Experimental determination of three-fluid saturation profiles in porous media

Abstract A method for nondestructively measuring local saturations with respect to multiple fluids is required for laboratory investigations of separate phase transport in porous media. The distribution of up to three fluids in a medium whose porosity is independent of changes in fluid content may be determined using the dual-gamma (137Cs-241Am) technique. A proposed calibration technique permits calculation of porosity and relative saturations from gamma attenuation data for porous media which are initially saturated with a single fluid. Porosity and saturation profiles measured for sand samples containing air, water and trichloroethylene or perchloro-ethylene are presented.

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