低渗透油藏注水开发调整方案数值模拟研究

Numerical Simulation on Adjustment Scheme of Water Injection Development of Low Permeability Reservoir

吉林油田某低渗透区块平面非均质性严重,到开发中后期时,剩余油呈高度分散的状态,常规注水效果较差。应用油藏数值模拟软件中的双孔模型以及修正后的毛管压力曲线,对影响后期注水开发效果的因素进行了详细的分析,得出：异步注采的注水方式效果较好,且应尽早实施,不对称式短注长采的工作制度效果最佳,异步注采的日注水量为常规注水日注水量的3~4倍。分析结果对低渗透油藏后期注水开发调整具有指导意义。

The plane heterogeneity is serious in the test area of low permeability reservoir in Jilin Oilfield. In the middle and later stage of low permeability reservoir development, the remaining oil in space is on a highly decentralized state. The effect of conventional water injection is poor. In this paper, dual-porosity numerical reservoir simulation software and corrected capillary pressure curve were used to analyze the factor of affecting water flooding development. The results show that, the best water injection mode is asynchronous injection production and implemented the sooner the better. Asymmetric reducing water injection time and increasing production time is the best solution. The daily water injection of asynchronous injection production is 3 to 4 times of conventional water injection, which has an instructive significance for the adjustment scheme of water injection development of low permeability reservoir.