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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。
In this paper, the reasons for the dynamic low interfacial tension between petroleum carboxylate [1] and alkali complex system and Daqing crude oil are discussed. The effects of salt content and alkali content on the dynamic low interfacial tension are also studied. The results show that the low interfacial tension is mainly contributed by the petroleum carboxylate active agent, whereas the dynamic low interfacial tension is caused by the interfacial actives generated by the reaction of the alkali and the organic acids in the crude oil. Within a certain range of content, with the increase of NaC1 or NaOH content, the dynamic low interfacial tension curve shifts to the low interfacial tension zone.