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本文基于聚合物微球调驱机理研究,针对BZ25-1油田开发现状,在室内开展聚合物微球筛选及性能评价研究,为油田现场聚合物微球调驱技术的实施筛选出最佳的调驱剂。通过物理模拟实验,对药剂体系的封堵性能和调驱性能进行研究。实验结果表明:BZ25-1油田用聚合物微球平均直径100nm,水化时间3-5天,膨胀性较好,抗压强度优良。聚合物微球在高低渗岩心中的封堵率分别为94.56%和92.78%,且聚合物微球体系对非均质油藏具有较好的驱油效果,在高低渗层采收率分别提高19.3%和9.2%。
In this paper, based on polymer microsphere modulation mechanism research, according to the development status of BZ25-1 oilfield, polymer microspheres screening and performance evaluation indoors, so as to screen the best tune Flooding agent. Through the physical simulation experiment, the plugging performance and the drive performance of the drug system were studied. The experimental results show that the average diameter of the polymer microspheres in BZ25-1 oilfield is 100nm, and the hydration time is 3-5 days. The polymer beads have good expansibility and excellent compressive strength. The plugging rates of polymer microspheres in high and low permeability cores were 94.56% and 92.78%, respectively. The polymer microspheres had better oil displacement effect on heterogeneous reservoirs and higher recovery rates 19.3% and 9.2%.