不同类型有机碱溶液与胜利原油间的界面张力

Interfacial Tensions between Organic Alkali solutions and Shengli Crude Oil

祝仰文 潘斌林 郭淑凤 王红艳 张磊 张路 赵濉

ZHU Yangwen PAN Bilin GUO Shufeng WANG Hongyan ZHANG Lei ZHANG Lu ZHAO Sui

本文研究了不同浓度的有机碱乙醇胺、N，N-二甲基乙醇胺、二甲胺、1,6-己二胺溶液与两种不同区块胜利原油间的动态界面张力，并比较了四种有机碱和三种无机碱NaOH、NaHCO3、Na2CO3与原油的相互作用。结果表明：线型有机碱乙醇胺能与原油中的石油酸反应，有效降低油水界面张力，并在pH值为12 左右达到超低界面张力；而尺寸较大的有机碱降低油水界面张力的能力较弱。同时，石油酸的含量和结构强烈影响有机碱与原油间的相互作用。无机碱降低界面张力的能力与乙醇胺相当，而且无机碱碱性越弱，与原油有效作用的pH 值就越低。图12 参13

The dynamic interfacial tensions between four organic alkalis solutions（ethanolamine，N，N-dimethyl ethanolamine， dimethylamine，1，6-Hexylenediamime）and shengli crude oils in two different blocks were investigated，and also the different interactions between three inorganic alkalis solutions（NaOH、NaHCO3、Na2CO3）and crude oils were compared. The experimental results showed that linearorganic alkali ethanolamine could react with petroleum acid，reducing the interfacial tension seffectively， and could lower interfacial tension to ultra-low value at pH value of 12. However，the organic alkalis with larger molecular size showed the weaker abilities of lowering interfacial tension. At the same time，the interaction between organic alkali and the crude oils were strongly influenced by the content and structure of petroleum acid. The inorganic alkali had the same abilities to reduce the interfacial tensions as the ethanolamine. Moreover，the weaker the alkalinity of the inorganic alkali，the lower pH value needed to react with crude oil.