期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 311, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2020.113179
关键词
Zwitterionic gemini surfactants; Critical micelle concentration; Wettability; Interfacial tension; Enhance oil recovery
资金
- National Natural Science Foundation of China [21671157, 21371143]
In this paper, a series of double quaternary ammonium salts zwitterionic gemini surfactants YLZ-0-YLZ-4 has been synthesized for the oilfield of high reservoir temperature, high salinity, and even a low API (crude oil density) proportion, which have all increased the difficulties of oil recovery. The products were characterized by IR, ESI-MS, elemental analysis and melting point tests and their physicochemical properties were tested, including solubility, surface tension, critical micelle concentration (CMC), wettability, interfacial tension, salt tolerance, divalent cations tolerance, emulsification, adsorption and flooding experiment. The CMC of the surfactant YLZ-3 is 0.0178%, and it has the best effect of changing the wettability of the rock surface; Under the condition of high salinity injection water in the oilfield, the interfacial tension of YLZ-3 solution reached an ultra-low value of 0.0053 mN/m at the concentration of 0.1% (wt%). Furthermore, YLZ-3 can enhance oil recovery by 9.48% in laboratory flooding experiment. (C) 2020 Published by Elsevier B.V.
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