含固体颗粒二元复合驱原油乳状液破乳研究

Demulsification of Crude Oil Emulsion with Solid Particles in Surfactant/Polymer Binary Flooding

杨敬一 栾雨骅 祝仰文 张 俊 徐心茹

YANG Jingyi LUAN Yuhua ZHU Yangwen ZHANG Jun XU Xinru

为了有效处理含固体颗粒的聚合物/表面活性剂二元复合驱原油乳状液油水分离困难的问题， 采用界面张力仪和全功能稳定性分析仪考察了硅藻土、 破乳剂、 部分水解聚丙烯酰胺（HPAM）和石油磺酸盐表面活性剂对胜利海上原油二元复合驱采出液稳定性和油水界面性质的影响。结果表明， 非离子破乳剂 ECY-05和有机硅破乳剂 589按质量比 4∶1组成的复配破乳剂 FP的破乳效果良好， 随着 FP加量增大， 乳状液稳定性降低， 油水界面张力减小， 脱水率增加， FP加量为 200 mg/L时， 含固原油乳状液 60 min脱水率为 88%； 随着 HPAM、 表面活性剂和硅藻土含量的增加， 乳状液稳定性增加， 脱水率降低； 油水界面张力随着硅藻土加量的增大而增大， 随表面活性剂浓度的增大而减小， HPAM对油水界面张力影响较小， 三者的协同作用使得脱水率降低。图 6表7参 17

In order to effectively deal with the oil water separation problem of surfactant/polymer（SP）binary flooding emulsion containing solid particles，the effects of diatomite，demulsifiers，partially hydrolyzed polyacrylamide（HPAM）and petroleum sulfonate surfactant on the stability of produced fluid and interfacial property of Shengli offshore crude oil SP flooding were investigated using interface tension tester and turbiscan LAB analyzer. The results showed that a compound demulsifier FP had good demulsification effect，which composed of nonionic demulsifier ECY-05 and organic silicon demulsifier 589 with mass ratio of 4∶1. The stability of the emulsion and the interfacial tension decreased and the dehydration rate increased with increasing dosage of FP. When the mass concentration of FP was 200 mg/L，the dehydration rate of crude oil emulsion with diatomite reached 88% in 60 minutes. With the increase of HPAM，surfactant and diatomite content，the stability of emulsion increased and the dehydration rate decreased. The interfacial tension between oil and water increased with the increase of diatomite，while that decreased with the increase of surfactant. HPAM had little effect on the interfacial tension. The synergistic effect of the three made the dehydration rate lower.

10.19346./j.cnki.1000-4092.2017.03.023