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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.
The strong alkali ASP flooding technology can improve the flooding efficiency and expand the wave volume, greatly enhance the recovery rate, showing a broad prospects for the steady development of the old oilfield.This paper with the help of three yuan composite flooding coring wells and new drilling data , To deepen reservoir understanding and evaluate oil displacement efficiency.According to the analysis of experiments such as indoor core flooding and micro-displacement, as well as the application of numerical simulation, nuclear magnetic resonance, electron microscopy and electric drilling curve of new drilling, The results show that interlayer and plane heterogeneity are the main factors affecting the oil displacement efficiency of ASP flooding , The flooding effect of strong alkali ASP flooding increased 14.7% compared with that before ternary, the thickness of high flooding layer increased by 26.0%, and the wettability of rock changed to hydrophilicity.After the flooding efficiency of ASP flooding Evaluation, to provide a reference basis for tapping potential adjustment in the process of industrial promotion, and further improve the ASP flooding technology to enhance oil recovery.