Progress in research of sulfobetaine surfactants used in tertiary oil recovery |
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| Authors: | Jiayue Lu Wanfen Pu Wei He Binyang Zou Bowen Li Rui Liu |
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| Affiliation: | 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, School of Chemistry and Chemical, Southwest Petroleum University, Chengdu, People's Republic of China;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, School of Petroleum Engineering, Southwest Petroleum University, Chengdu, People's Republic of China |
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| Abstract: | The synthesis of sulfobetaine surfactants and their application in tertiary oil recovery (TOR) are summarized in this paper. The synthesis of sulfobetaine surfactants was classified into three categories of single hydrophobic chain sulfobetaine surfactants, double hydrophobic chain sulfobetaine surfactants and Gemini sulfobetaine surfactants for review. Their application in TOR was classified into surfactant flooding, microemulsion flooding, surfactant/polymer (SP) flooding and foam flooding for review. The sulfonated betaine surfactants have good temperature resistance and salt tolerance, low critical micelle concentration (cmc) and surface tension corresponding to critical micelle concentration (γcmc), good foaming properties and wettability, low absorption, ultralow interfacial tension of oil/water, and excellent compatibility with other surfactants and polymers. Sulfobetaine surfactants with ethoxyl structures, hydroxyl and unsaturated bonds, and Gemini sulfobetaine surfactants will become an important direction for tertiary oil recovery because they have better interfacial activity in high-temperature (≥90°C) and high-salinity (≥104 mg/L) reservoirs. Some problems existing in the synthesis and practical application were also reviewed. |
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| Keywords: | heat resistance and salt tolerance interfacial properties sulfobetaine surfactants synthesis tertiary oil recovery |
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