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本文是针对大庆某油田一区块两相驱油试中出现的采出井见气快,个别井发生气窜等问题,为了进一步提高气聚交替驱油效果而提出的。通过微观驱油机理、室内岩心实验及数值模拟对气聚交替驱油机理进行了研究,将研究成果应用于现场试验,增加了高浓度段塞、缩短了气聚交替周期、调整了聚合物分子量,并取得了很好的增油降水效果。
In this paper, aiming at the problems of two wells in a block of Daqing Oilfield, such as quick recovery of production well, gas channeling in individual wells, etc., in order to further improve the gas-oil displacement effect. The micro-displacement mechanism, indoor core experiments and numerical simulation were used to study the mechanism of gas-oil alternating oil displacement. The research results were applied to field experiments, and high concentration slugs were added to shorten the cycle of gas-polymer alternation and adjust the polymer molecular weight , And achieved good oil precipitation effect.