【摘要】 本文探讨了石油羧酸盐［１］及碱复合体系和大庆原油间的动态低界面张力形成的原因，并研究了盐含量、碱含量对其间动态低界面张力的影响。结果表明，低界面张力主要是石油羧酸盐活性剂的贡献，而动态低界面张力过程是由水相中碱与原油中的有机酸反应生成的界面活性物质引起的。在某一含量范围内，随ＮａＣ１或ＮａＯＨ含量增加，动态低界面张力曲线移向低界面张力区。更多还原

【Abstract】 This paper discusses the reason for forming the dynamic low interfacial tension of combination system of petroleum carboxylate and alkali between Daqing crude oil.Also,it studies the influence of salt and alkali content on the dynamic low interfacial tension.The result shows that low interfacial tension is the contribution of petroleum carboxylate surfactant,while dynamic low permeable interfacial tension is caused by the active matter generating in the reaction between alkali in water phase and organic acid in crude oil.In a certain content scope,with the increasing of the content of NaCl and NaOH,dynamic low interfacial tension curve moves toward low interfacial tension area.更多还原