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对于非均质多油层油藏,现有开采理论和技术难以大幅度挖掘难采及滞留的剩余油,提出了同步聚能等流度调控大幅度提高采收率的新方法和驱油机理。通过等流度设计,实现了非均质层内的分流、聚能、聚流过程,达到大幅度驱油节能、节约注入水、减少注剂、降低投资、高效挖掘难采剩余油及大幅度提高采收率和开采效益的目的。数值模拟研究和对岩心渗透率为0.1~3.0μm2的非均质油层室内实验表明,水驱后聚能等流度驱油均获得较好效果,大幅度减少了注剂量、提高了驱油效率和采收率(60%~80%)。现场试验分析表明,该方法能大幅度提高采收率。
For the heterogeneous multi-reservoir, it is difficult to excavate the residual oil that is hard to adopt and retain due to the existing mining theory and technology. A new method and oil displacement mechanism are proposed, such as synchronous energy gathering and fluid flow control to greatly enhance oil recovery. Through the equal flow design, the diversion, energy gathering and condensing flow in the heterogeneous layer are realized, a great oil displacement and energy saving can be achieved, water injection is saved, injection is reduced, investment is reduced, and residual oil remaining hard to be tapped is greatly excavated, Improve recovery and recovery efficiency purposes. Numerical simulations and in-situ experiments on heterogeneous reservoirs with core permeability of 0.1-3.0 μm2 show that fluid flooding has good effect on fluid flooding, such as fluid flooding, greatly reducing the dosage and improving oil displacement efficiency And recovery (60% ~ 80%). Field test analysis shows that this method can greatly improve oil recovery.