聚合物/表活剂二元体系在多孔介质中运移的黏度和界面张力变化

 黏度和界面张力是评价聚合物/表活剂二元体系驱油能力的主要指标，研究二者在多孔介质中运移过程中的变化对提高二元体系驱油能力有重要指导意义。设计4 种注入段塞的二元体系在3 种长度的填砂模型运移的室内实验，对体系运移过程中黏度和界面张力的变化进行研究。结果表明：在注入速度和运移距离相同的条件下，注入段塞越大，流出液的最低界面张力更低，保持低界面张力的时间更长，黏度保留率也更高；在注入速度和段塞相同的条件下，运移距离越长，流出液的界面张力保持低界面张力程度越高，黏度保留率越高。研究结果对现场二元体系的注入方案设计具有一定指导作用。

Variations of Viscosity and Interfacial Tension of Polymer/Surfactant Binary Flooding in Porous Media

Viscosity and interfacial tension are the main indexes of polymer/surfactant binary flooding to evaluate the oil displacement efficiency. Study on the variations of viscosity and interfacial tension of polymer/surfactant binary flooding in porous media plays a guiding role. In order to study the variation of the system in porous media, flood test is designed which uses four kinds of injected slugs and three kinds of sand filling tubes to study the variation of viscosity and interfacial tension of the system. The results show that under the same injection speed and the flow distance, the greater slug injected, the lower minimum interfacial tension obtained, a longer time maintained and a higher viscosity retained. Under the same injection speed and injected slug, the longer the flow distance, the lower minimum interfacial tension obtained, a longer time maintained and a higher viscosity retained. These results have an important guiding role for the binary system of injection plan design.