This article designed a flowability experiment for the reinjection of 1000mD rock core with different water quality salt resistant polymer wastewater blending systems.The degree of damage caused by the blending system to the core was evaluated based on permeability loss rate,and its injection boundary was determined.The oil displacement effect was evaluated through oil displacement experiments.The research results showed that the oil layer protection and enhanced oil recovery of salt resistant polymer wastewater blending reinjection have a positive effect.
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