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本文针对青海尕斯油田油藏条件,通过室内实验,筛选了适合该油藏条件的交联聚合物凝胶+水膨体颗粒复合调驱体系的注入参数,并对配方体系的驱油效果进行了评价。实验结果表明,在复合体系的配方为:1500mg/L HPAM+400mg/L有机酚醛+100mg/L稳定剂+100mg/L除氧剂+0.5%水膨体颗粒时,该复合调驱体系可有效封堵大孔道、改善注入水剖面,并有很好的驱油作用,其具体效果为封堵效率可达到90%以上,提高采收率可达到17.8%左右。
In this paper, according to the reservoir conditions of Gas Oilfield in Qinghai Province, the injection parameters of cross-linked polymer gel + water swollen particle composite flooding system suitable for the reservoir conditions were selected through laboratory experiments. The flooding effect of the formula system The evaluation. The experimental results show that the composite flooding system is effective when the formulation is as follows: 1500mg / L HPAM + 400mg / L organic phenolic + 100mg / L stabilizer + 100mg / L oxygen scavenger + 0.5% Plugging large channels to improve water injection profile and good oil displacement effect, the specific effect of blocking efficiency can reach more than 90%, increase recovery rate can reach 17.8%.