Physicochemical Properties and Injection Timing of JCP-1 Nano Polymer Microspheres

Abstract

In order to clarify the profile control plugging mechanism of polymer microsphere in the low permeability reservoir, and improve the recovery of low permeability reservoir and prolong the stable production time. The swelling property of polymer microspheres are tested and studied by optical microscope and laser particle size analyzer, and through the physical simulation experiment of heterogeneous reservoir was analysed the flooding effect of injecting microspheres with dynamic moisture content of 60%, 80% and 90%. The experimental results showed that, with the prolongation of hydration time, the particle size of the polymer microspheres increases gradually, the long chain molecules are intertwined with each other, and the size of the microspheres is graded. The final recovery was 57.68%, 73.01% and 66.01% respectively. When at the three kinds of dynamic water cut, injected the polymer microspheres into the heterogeneous reservoir. The increase of recovery was 33.74%, 17.98% and 22.29% respectively. According to the optimum injection time, the polymer microsphere flooding is carried out when the dynamic water cut of the reservoir is 60%. The research results provide theoretical and technical support for enhancing oil recovery in low permeability reservoirs.KeywordsLow permeability reservoirProfile control and flooding mechanismInjection timePhysical simulationPerformance evaluation