Numerical Simulation Of The Mechanisms Of High - Level Faults In Jiangsu Oilfield

China main reservoir heterogeneity is more serious, and the difference between the longitudinal plane of reservoir heterogeneity, oil viscosity, and injection well group of internal imbalance. It will inevitably cause phenomenon of tongued advance for injected water along the direction of plane to the direction of production well and the phenomenon of breakthrough in high permeability zones. Especially in the later stage of water flooding, water cut of production well content up to80%, then the pore structure and the physical parameters will be change and the special high permeability zone will build likely between injection wells and production wells due to the long-term erosion of the injected water. Causing the injected water become invalid circulating fluid between the injection wells and production wells because the channel diameter of seepage will be larger, thus greatly reducing the efficiency of water flooding. The Weak gel technology enables hypertonic with large pore formation to cause filtrational resistance and resist follow-up water go forward, thereby pressure field and flow lines field will be change due to long-term waterflooding development, thus increase the swept volume, improve waterflooding development effectiveness to reach in-depth profile control.This article study focuses effect of weak gel flooding on the gao-seven block of Jiangsu field,through numerical simulation method,individual use the phenolic crosslinking system and organic chromium crosslinking system, individual use different implanting dose, injection rate, different conditions of polymer concentration and injection time four parameter to analysis migration law and plugging preferential seepage channel after the weak gel system into the formation, combined with the formation pressure, the layers inflow and so on mathematical model resulting of curve to study weak gel system gelling and flowing resistance in layers to comprehensive analysis weak gel system Adaptability in gao-seven block, through weak gel system the flooding simulations can predict flow condition and dewater production gain effect of pattern response under different parameters, but also through the simulate results can start make profile control optimum design to provide theoretical basis, further adjust the optimal matching injection parameters, achieve the best profile control effect.