聚表剂驱模拟采出液油水界面性能研究

Properties on Oil/Water Interface of Simulative Produced Liquid during Polymeric Surfactant Flooding

通过考察聚表剂对大庆油田聚表剂驱模拟采出液油水界面张力、油水界面扩散双电层zeta电位、界面粘弹性以及界面膜强度的影响,研究聚表剂对聚表剂驱模拟采出液油水界面性能的影响规律。结果表明:具有表面活性剂和聚合物双重性能的聚表剂利用其两亲性质在油水界面吸附,形成稳定的界面膜,使油水界面张力降低,界面膜强度增加;且随聚表剂浓度增加,油水界面张力降低,界面膜强度增加。在所研究的四种聚表剂类型中,海博Ⅲ(O/W)型聚表剂改善油水界面性能的效果较为突出。

The influences of the polymeric surfactant on the interface properties of simulation produced liquid during polymeric surfactant flooding were studied in the paper. These interface parameters were interfacial tension, diffusion zeta potential, interface viscoelasticity and strength of interface film. The influence law of polymeric surfactant on properties of oil-water interface was investigated. The results showed that polymeric surfactant with surfactant and polymer performance was adsorbed at oil-water interface for amphiphilic properties, and the stable interface film was formed. The interracial tension of simulation produced liquid during polymeric surfactant flooding was reduced, and the interracial strength increased. Moreover, the interracial tension was decreased, and the strength of interface film was increased with the increasing of the concentration of polymeric surfactant. Among the four types of studied polymeric surfactant, the effect of 11 （O/W） polymeric surfactant on the interface properties of simulation produced liquid during polymeric surfactant flooding was better than other polymeric surfactant.