活性剂对油田污水回注影响研究

Research on Effect of Active Agent on Oilfield Sewage Reinjection

通过提高油田污水的循环利用是减少含油污水外排污染的有效途径,但油受到油藏差异性和采油用剂的影响,油田污水回注效率大大降低。为提高中后期油田污水的回注效率,合成一种磺酸盐类的高分子活性剂,以油水界面张力性能、润湿性能、油水乳化能力、洗油率等作为评价指标,从而研究活性剂的分子结构对驱油效率的内在影响机理,为油田回注提供理论与实践参考。

Improving the oilfield wastewater cycle utilization is effective way to reduce the oily sewage pollution discharge, but oil was affected by difference of reservoir and oil recovery agents, oilfield produced water reinjection efficiency is greatly reduced. To improve oilfield sewage reinjection efficiency, a sulfonate surfactant was synthesized, and it was evaluated with the performance of oil water interracial tension, wettability, oil-water emulsification rate as evaluation indexes. At last, effect of the surfactant molecular structure on efficiency of oil displacement was investigated.