Influence of surfactants used in surfactant-polymer flooding on the stability of Gudong crude oil emulsion

作     者：Dong Zhaoxia Lin Meiqin Wang Hao Li Mingyuan Dong Zhaoxia , Lin Meiqin, Wang Hao and Li Mingyuan Enhanced Oil Recovery Research Center, China University of Petroleum, Beijing 102249, China

作者机构：Enhanced Oil Recovery Research Center China University of Petroleum Beijing 102249 China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2010年第7卷第2期

页      面：263-267页

核心收录：

学科分类：081702[工学-化学工艺] 082604[工学-军事化学与烟火技术] 08[工学] 0817[工学-化学工程与技术] 0826[工学-兵器科学与技术] 

基　　金：supported by the National Key Scientific and Technological Projects (2008ZX05011) 

主　　题：Surfactant Gudong crude oil interfacial properties emulsion stability 

摘      要：The influences of an anionic-nonionic composite surfactant and petroleum sulfonate, used in surfactant-polymer flooding in Shengli Gudong oilfield, East China, on the interfacial properties of Gudong crude model oil and synthetic formation water was studied by measuring interfacial tension, interfacial viscoelasticity and Zeta potential. The in？ uence of the surfactants on the stability of Gudong water-in-oil （W/O） and oil-in-water （O/W） emulsions was evaluated by separating water from the W/O emulsion and residual oil in the aqueous phase of the O/W emulsion respectively. The results showed that the two kinds of surfactants, namely anionic-nonionic composite surfactant and petroleum sulfonate, are both able to decrease the interfacial tension between the oil phase and the aqueous phase and increase the surface potential of the oil droplets dispersed in the O/W emulsion, which can enhance the stability of the W/O and O/W crude oil emulsions. Compared with petroleum sulfonate, the anionic-nonionic composite surfactant is more interfacially active and able to enhance the strength of the interfacial film between oil and water, hence enhance the stability of the W/O and O/W emulsions more effectively.