疏水缔合聚合物对SZ36-1油田生产污水稳定性的影响研究

Influence of Hydrophobic Associating Polymer on Produced Wastewater Stability in SZ36-1 Oilfield

苏延辉 刘 敏 郭海军 王永军 段 明 夏旖旎

SU Yan-Hui LIU Min GUO Hai-Jun WANG Yong-Jun DUAN Ming XIA Yi-Ni

针对SZ36-1油田聚合物驱生产污水组成特点，分别测定不同相对分子质量、浓度及水解度的疏水缔合聚合物对污水表观黏度、污水中油滴粒径、Zeta电位、油水动态界面张力、油水平衡界面张力、油水界面扩张黏弹性等指标的影响。研究结果表明：生产污水中所含降解后低相对分子质量聚合物会增加污水黏度，吸附于油水界面增强生产污水中O/W型乳液滴的负电性，增加油水界面膜弹性强度，增强污水乳化程度和稳定性，降低污水中油滴的聚并效率。

According to the composition of wastewater produced in SZ36-1 polymer flooding of oil field, the effect of molecular weight, concentration and hydrolytic degree of hydrophobic associating polymer on the apparent viscosity, particle sizes of oil droplets, Zeta potential, dynamic interfacial tension, equalize interfacial tension and interfacial dilational properties were measured. The results indicated that the produced polymer with low molecular weight could improve the apparent viscosity of wastewater, the zeta potential of O/W emulsion and the oil-water interfacial film strength were increased after adsorption of polymer in oil-water interface. Consequently, the wastewater emulsion stability was increased, and the coalescence efficiency of oil droplets in wastewater decreased greatly.