活性油堵水剂室内岩心实验研究

Core Experiment Study on Active Oil Water Plugging Agents

针对国内大部分油田注水主力区块陆续进入高含水和特高含水开发阶段、剩余油分布零散挖潜难度大等问题。以油田现场高含水非均质储层为模拟对象,以注入压力、含水率和采收率为评价指标,开展了稠化油堵水室内岩心模拟验。结果表明,堵水剂进入储层高渗透的渗透层后,一方面可以对高渗透层的无效循环通道进行封堵,另一方面从后续水驱渗流阻力和吸液启动压力以及采收率的增加,判断出后续水进入岩心的中低渗透的层,起到扩大波及体积的效果。

Most of main water injection blocks in domestic oil fields have entered high water cut development stage, the remaining oil distribution is scattered, so it is difficult to tap the potential. In this paper, taking high water cut heterogeneous reservoir in the oil field as a simulating object, using the injection pressure, water cut and recovery as evaluating indicators, the core simulation test of thickened oil blocking water was carried out. The results show that, after plugging agent enters into the reservoir layer with high permeability, on the one hand, the effective circulation channel of the high permeability layer can be blocked, on the other hand, from the increase of subsequent water flooding flow resistance and suction actuating pressure and recovery, whether the subsequent water enters into the low permeability layer in the core can be determined to expand the swept volume.