Study And Application Of The Technology Of The Fire-displacement Profile Control And Sealing Of DU 66 Block In Liao He Oilfield

During the continuous deepening process of the fire-flooding development of DU 66 block,LiaoHe oilfield,the effect of the fire flooding is greatly different from well spacing,sedimentary facies,reservoir heterogeneity and mining condition.Because of the uneven firing line,some production wells are unilaterally affected,and the whole development effect of the fire-flooding block is affected.In order to improve the use of low permeability,prevent one-way dash of the FireWire and improve the overall development effect of the fire flooding group.This paper proposes bi-directional regulation on the fire-injection gas wells and production wells in Du 66 block: In the gas injection well,the control technique is applied to the gas injection wells,and the high apparent viscosity and Jia Min effect of foam are used to increase the flow resistance of the large pores,forcing the airflow to turn,and to adjust the reservoir longitudinal profile.In the production wells,the chemical sealing technology of compound slug,the use of strong gel plugging agent flow performance and high temperature sealing agent blocking strength,small displacement injection,long-distance blocking for technical thinking,prevention and control of the FireWire one-way dash,improve the overall development of fire-flooding group.This paper analyzes and researches the profile control technology of the DU 66 block fire injection Well,and selects the foaming agent suitable for the profile control technique of the fire gas injection well in du 66 block,and evaluates the foaming performance,stabilizing performance and sealing performance of the foaming agent.This paper studies the method of gas channeling plugging in the fire-flooding production wells of DU 66 block,and adopts the composite block plugging system.According to the characteristics of the temperature distribution of the fire-flooding production wells,the combination of strong gel plugging agent + high temperature inorganic gel profile Control agent or strong gel plugging agent + High temperature resistant agent is used to select different channeling agent system according to the different well condition.And the performance of strong gel plugging agent,high temperature inorganic gel profile control agent and high temperature resistance to channeling agent were evaluated.Through the field application proves that DU 66 block fire-driven by channeling plugging technology,vertically improved the low permeability level of use,the plane expanded the effective volume of injected air,the FireWire to promote even positive effect.