Research On Parameter Optimization Of Enhanced Oil Recovery For After Polymer Flooding Reservoir Integral Plugging And Profile Control

Polymer flooding is one of the important methods to enhance oil recovery for ourcountry’s high water-cut oil fields. But after polymer flooding,water return to speedup,remaining oil is more scattered,reservoir heterogeneous aggravate,conditions becomefurther complicated,tapping potentiality more difficult.Therefore,developed a new overallplugging and profile control technology suitable for after polymer flooding reservoir becomea key problem.In this article,do research into plugging mechanism,remaining oil distribution andinfluence factors of whole plugging adjustment effect,optimization of whole pluggingadjustment parameters,and finally present a kind of parameter optimization method suitablefor after polymer flooding reservoir for overall plugging and pofile control through sealedcoring,numerical simulation,physical simulation,chemical tests on lab,theoretical research.etc.Through core analysis,numerical simulation and physical simulation research,descriptionthe remaining oil and underground presssure field in after polymer flooding reservoir.Find outthe distribution rules of fluid field and presssure field,so as to judge the dominantchannels,and provide a basis for overall plugging and pofile control.To study the factorsinfluencing overall plugging and proile control from simulation research,so as to determinethe reservoir adaptability.Operation parameters are optimized to includingconcentration,dosage,injection speed,slug combination mode,and so on.