The Research Of Water Injection Optimization Technology Of Low Permeability Oil Field In Panguiiang

In recent years, water flooding is one of main methods to improve oil recovery. How tooptimize the water injection has an important theoretical and application value in improvinglow permeability reservoir water flooding development effect.This study using the real core and injecting water of Panguliang oilfield has done theinterior reservoir physical simulation experiment. Based on the reservoir sensitivity and waterquality analysis, it studied the effect of injection water salinity, water injection rate anddifferent plug on oil displacement efficiency. The main conclusions obtaines by theexperiment:In different plug oil displacement experiment, high permeability core can increase theefficiency of oil displacement and the displacement efficiency is relatively high；the salinity ofinjected water reduced more, smaller increase in oil displacement efficiency；the three slugflooding efficiency more than double slug displacement efficiency increase is larger, and theultimate oil displacement efficiency is higher.The injection rate increased to a certain extent is conducive to improve the displacementefficiency of water flooding, but when the speed is too large or too small, the oil displacementefficiency are reduced. The salinity of injected water and injection speed alternately changedwill greatly increase the oil displacement efficiency, and the ultimate oil displacementefficiency increases more than three slug and slug.The results of this study will provide certain theoretical basis in the actual water flooddevelopment.