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Study on Interfacial Tension between Series of Petroleum Sulfonates and Shengli Oil

Wang Hongyan (Research Institute of Geological Science,Shengli Oilfield,SINOPEC, Dongying 257015)  
The interfacial tension between Shengli petroleum sulfonates or series of petroleum sulfonates and shengli oil with different components was studied. The result showed that the difference in properties of petroleum sulfonates was a result of difference in compositions of shengli oil with different content of saturated hydrocarbon, aromatic hydrocarbon and polar components. The same petroleum sulfonate couldn't be used in oils from different oil fields with the interfacial tension not low enough to meet the demands. Suitable surfactant aids should be added. Series of petroleum sulfonates had good compatibility with the oil and water in the same oilfield. High interfacial activity could be obtained without adding any surfactant aids by using the above series of petroleum sulfonates in low content.
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