关键词: 河滩油田, 多层系, 二次开发, 地下认识体系, 剩余油

Abstract: In view of the problems of Hetan Oilfield in Zhanhua Sag such as multiple oil-bearing series, strong heterogeneity, scattered remaining oil distribution, and aging gathering and transportation system, the authors follow the principle of redevelopment to old oilfield, take the reconstruction of new understanding system of underground reservoirs as the target. 3D seismic data, core data and well log were applied to carry out fine structure research of fault block oilfield and fine reservoir research. Based on the research, through the comprehensive technology application of monitoring data, history of injection-production condition, numerical simulation and reservoir engineering method, the residual oil potential was evaluated and quantified accurately. Taking the idea of adjustment while understanding, the effect of oilfield development achieves initial improvement, the requisite material foundation of the redevelopment is clear and the redevelopment plan is worked out. All this lay the foundation for improving the level of reservoir development and enhancing the recovery ratio.

Key words: Hetan Oilfield, multilayer reservoir, redevelopment, understanding system, remaining oil