Seepage Field Evolution And Water Seal Reserach Of A Large Scale Underground Crude Oil Storage Caverns

Oil consumption with the rapid development of our economy increased rapidly in recent years. It is an important means to ensure energy security and maintain the healthy development by establishing strategic oil reservation. The advantages of the underground petroleum storage caverns are low occupation of farmland, security, less pollution, low costs of management, less investment, combat requirements and so on. It is great important to establish underground crude oil storage caverns. The main key to the construction and operation of water sealed underground storage is to use the infiltration characteristics formation reservoir of water seal fluid density. The research of petroleum reserve water and seepage field carried out in underground has profound practical significance.In the background of a water sealed underground cavern project,Adopts The research contains seepage field with the dynamic changes of the construction process, drencher system optimization design analysis and water curtain hole water seal effect by combination of numerical simulation, field test, theoretical analysis and so on.The main contents of the thesis are as follows:(1) The established of hydrogeological conceptual model by the collection of data and regional hydrogeological parameters.(2) It is necessary to study the seepage field change and water seal system in reservoir. Which construct a three dimensional numerical model of groundwater, and correction the model, simulation of seepage field changes in the process of construction, the necessity of water seal system is determined.(3) The study of construction water curtain hole and water seal effect. According to the injection-down test and validity test about water curtain hole in Huang Dao Underground Crude Oil Storage Caverns.The reserach of construction water curtain hole and water seal effect by analysis of test data.(4) Research on the influence law of water seal and water curtain hole optimization by the joint fissures.Through numerical simulation, which determine the optimal water curtain hole layout distances by study the influence law of water seal with the joint fissures and put forward water curtain hole layout standard under different occurrence joint fissures, These studies provide theoretical basis for the engineering construction.