有机碱乙醇胺对胜利原油界面张力的影响

采用旋转滴法测定了有机碱乙醇胺与胜利油田5个不同区块原油间的动态界面张力,并对比分析了有机碱和无机碱对原油界面张力的影响。实验结果表明,乙醇胺与原油中的酸性组分反应,能够有效降低油水界面张力,在适宜条件下达到超低界面张力。原油中酸性组分的含量和结构是影响有机碱与原油间界面张力的关键因素。无论有机碱还是无机碱,对于同一种原油,碱性越弱,与原油有效作用的pH值就越低。

Effect of organic alkali ethanolamine on the interfacial tensions of Shengli crude oils

The dynamic interfacial tensions between organic alkali ethanolamine and Shengli crude oils from five different blocks were investigated using the spinning drop method. The influence of different types of inorganic alkalis on the interfacial tensions of crude oils was compared with that of organic alkali. Experimental results showed that ethanolamine could react with petroleum acid to effectively reduce the interfacial tensions, and the ultra-low interfacial tension could be obtained at the optimum condition. The interfacial tensions between organic alkali solutions and crude oils were determined mainly by the content and structure of petroleum acids in the crude oils, and accordingly, the dynamic interfacial tensions showed quite different behaviors between ethanolamine and crude oils from different blocks. For both organic and inorganic alkalis, the weaker the alkalinity was, the lower the pH value needed to react with crude oil.