Application Of Well Test Data For Optimization On Profile Controlling And Flooding Of Low Permeability Oilfield

Profile control and water plugging is one of the effective way to improve water injection efficiency and stabilize reservoir production.However,due to water-flooding development prolonged,complex dominant channel of influx cross flow would come out underground,which brings greater difficulties for profile control and water plugging in return.Therefore,it is crucial to identify the types and relevant parameter of influx in high permeability layer,and to selective suitable blocking agent,and to optimize the simple and practical technology of profile control for improving water injection efficiency,strengthening the water flooding environment and enhancing oil recovery.Taking the low permeability oilfield of BLC as an typical example in this thesis,an indicator system of profile control are put forward to recognize the channeling-path of oil and water wells from the point of two aspects: indicators of static single well and dynamic single well.The channeling-path,pore channel is distinguished by water cut rising velocity curve.Calculation parameters of the existence channeling thickness,permeability and radixis of pore channel.Use testing data for further research and analysis,Well profile measures to carry out decisions by PI index,At the same time with the dimensionless pressure drop curve to identify the advantage of the flow channel between injection wells and production wells.According to the well testing of swift software to judge the large pore.Research profile well variation of the testing curve,analyzes the injection-production balance and connectivity between wells.Finally,with field examples this paper proves it method is reliability and achieve better results,indicating that the method is simple and more feasible.