多油层强碱三元复合驱后驱油效率评价

发布时间：2019-02-15 02:40

【摘要】：强碱三元复合驱油技术能够提高驱油效率和扩大波及体积,大幅度提高采收率,展现出了老油田稳产接替的广阔前景.本文借助三元复合驱后取心井和新钻井资料,深化储层认识,评价驱油效率.通过室内岩心驱替、微观驱替等实验的分析,以及应用数值模拟、核磁共振、电镜检测、新钻井的电测曲线等技术手段,研究、评价强碱三元复合驱后储层不同部位的驱油效率,分析了驱油效率产生差异的影响因素.研究结果表明:层间和平面非均质性是影响三元复合驱驱油效率的主要因素,强碱三元复合驱后驱油效果与三元前对比增加了14.7个百分点,高水淹层厚度增加26.0%,岩石润湿性向亲水性转变.开展三元复合驱后驱油效率因素评价,为工业性推广过程中挖潜调整提供参考依据,进一步完善三元复合驱技术,提高采收率.
[Abstract]:Strong alkali ternary flooding technology can improve oil displacement efficiency and sweep volume, greatly improve oil recovery, showing a broad prospect of stable production replacement in old oil fields. In this paper, the core wells and new drilling data after ASP flooding are used to deepen reservoir understanding and evaluate oil displacement efficiency. Through the laboratory analysis of core displacement and micro-displacement experiments, as well as the application of numerical simulation, nuclear magnetic resonance (NMR), electron microscopy (TEM) detection, electrical measurement curve of new drilling, etc., The oil displacement efficiency of different parts of reservoir after strong alkali ASP flooding was evaluated and the influencing factors of oil displacement efficiency difference were analyzed. The results show that interlayer and plane heterogeneity are the main factors that affect the oil displacement efficiency of ASP flooding. The flooding effect of strong alkali ASP flooding increases by 14.7 percentage points compared with that of pre-ASP flooding, and the thickness of high water-flooded zone increases by 26.0%. The wettability of rock changes to hydrophilicity. The evaluation of oil displacement efficiency factors after ASP flooding is carried out to provide a reference basis for tapping potential adjustment in the process of industrial extension and to further improve the ASP flooding technology and enhance oil recovery.
【作者单位】：西北大学地质学系;大庆油田第四采油厂;
【分类号】：TE357.46

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