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J16块为辽河油田首个聚合物-表面活性剂复合驱工业化试验区块,现场调控经验不成熟,实施过程中出现了注入压力低、油井见效低、层间动用差异大、含水率回升较快等问题。将聚合物-表面活性剂复合驱全程变化规律细化为5个阶段,应用数值模拟正交分析方法,量化研究影响开发效果的主要因素。应用精细地质体描述技术、综合注入分析、多因素联动分析和油井受效分析等方法,明确了聚合物-表面活性剂复合驱在准备阶段、含水率下降阶段和低含水率生产阶段的研究重点和调控对策,并在平面、纵向、注采方式上采取增加采油井点、完善注采关系、分注调剖、堵水分采等调整措施。现场试验取得显著效果,阶段增油15.6×104t,低含水率生产38个月,阶段提高采出程度14.7个百分点。该研究为聚合物-表面活性剂复合驱的推广应用提供了借鉴。
J16 block is the first polymer-surfactant composite flooding industrial test block in Liaohe Oilfield, with immature field control experience. During the implementation process, the injection pressure was low, the well efficiency was low, the difference between layers was large, and the moisture content rose more rapidly And other issues. The polymer - surfactant composite flooding changes throughout the law is refined into five stages, the application of numerical simulation orthogonal analysis, the quantitative study of the main factors that affect the development effect. Using the method of fine geologic body description, integrated injection analysis, multi-factor linkage analysis and oil well analysis, the research focus of polymer-surfactant composite flooding in the preparation stage, the water cut stage and the low water cut stage is clarified And control measures, and in the plane, vertical, injection and mining methods to take to increase the production well point, improve the relationship between injection and production, distribution of profile control, plugging water and other adjustment measures. The field test has achieved remarkable results, with an increase of 15.6 × 104t in the stage, a production of 38 months in the low water cut stage and an increase of 14.7% in the stage of recovery. This study provides a reference for the popularization and application of polymer-surfactant composite flooding.