聚表二元驱油体系界面流变性研究

应用沟槽式界面粘度计和改进的测定方法,测得了聚合物与表面活性剂二元体系的表面粘度和与模拟油之间的界面粘度,结果表明,聚表二元体系表面层的流变性不同于它与油相之间界面层的流变性;提出了能够更好地描述界面流变性的无因次界面粘度,它排除了体相粘度的干扰;聚合物浓度显著影响界面流变性,当聚合物浓度位于其临界聚集浓度两侧时,聚表体系的无因次表面粘度和无因次界面粘度随表面活性剂浓度的变化趋势不同。

LABORATORY STUDY ON INTERFACIAL RHEOLOGICAL PROPERTY OF POLYMER/ SURFACTANT DISPLACEMENT SYSTEM

By means of deepOchannel viscous traction interfacial viscometer and improved measuring method , the surface viscosity of polymer/ surfactant dual system and the interfacial viscosity between polymer/ surfactant and simulation oil have been measured. Results show that the rheological property of surface layer of polymer/ surfactant fluids system is quite different from that of interfacial layer between polymer/ surfactant and simulation oil. The new parameter , dimensionless interfacial viscosity proposed in this paper , can describe the interfacial rheological property better , because it is free from the influence of bulk viscosity. Polymer concentration influences interfacial rheological property remarkably , while polymer concentration located in the two sides of its critical associating concentration , the tendencies of dimensionless surface viscosity and dimensionless interfacial viscosity with surfactant concentration are inconsistent .