Efficiency of a sulfobetaine-type surfactant on lowering IFT at crude oil–formation water interface

Ping Jiang1, Na Li2, Jijiang Ge1, Guicai Zhang1, Yang Wang1, Lifeng Chen1, Lei Zhang1
1Petroleum Engineering College, China University of Petroleum, Qingdao 266580, China
2Development Research Dept, CNOOC Research Institute, Beijing 100027, China

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