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针对高含水期油藏三次采油评价困难的问题,在室内岩心驱替实验物理模拟高含水期油藏后期聚驱和复合驱驱油过程基础上,对聚合物驱不同段塞大小、不同段塞浓度的聚驱效果进行了模拟评价,得出:随聚合物注入PV数的增加,聚合物驱油效率增大,但增大幅度逐渐变小;随注入聚合物浓度的增加,聚合物驱油效率逐渐增大,其增大幅度逐渐变小。在此基础上,对辽河油田SH高含水油藏进行了聚合物驱和复合驱可行性评价,对比和分析了聚合物驱、聚合物-表活剂驱、聚合物-碱驱以及聚合物-表活剂-碱驱驱油效果,认为聚合物驱为该油藏最优的开发调整方式。
Aiming at the difficulty in the evaluation of tertiary recovery in high water cut reservoirs, based on the experiment of physical simulation of displacement and flooding of polymer flooding and composite flooding in high water cut reservoir by indoor core flooding, the effects of different slug size, Concentration polymer flooding effect was simulated and evaluated. It was concluded that with the increase of polymer PV, the flooding efficiency of polymer increased, but the increasing extent gradually became smaller. With the increase of polymer concentration, polymer flooding Efficiency is gradually increasing, and its increase is gradually getting smaller. Based on this, the feasibility of polymer flooding and composite flooding was evaluated for SH high water-cut reservoirs in Liaohe Oilfield. The polymer flooding, polymer-surfactant flooding, polymer-alkali flooding and polymer- Surfactant - alkali flooding effect, that the polymer flooding for the reservoir development and adjustment of the best way.