METHOD FOR DETERMINING RESIDUAL OIL SATURATION OF A WATERED-OUT RESERVOIR

摘要

METHOD FOR DETERMINING RESIDUAL OILSATURATION OF A WATERED-OUT RESERVOIRAbstract of the DisclosureA method for determining residual oil saturation of awatered-out reservoir using two water soluble tracershaving different partition coefficients in oil. Thepartitioning tracers are selected from the groupconsisting of tritiated or carbon 14 tagged alcohols,ketones, aldehydes, water and oil insoluble inorganics andorganic radioactive isotopes. The tracers are injectedinto the formation, and their production curves areanalyzed over a period of time to determinechromatographic separation of the tracers.22658/18/1-1-1/31