SB-16/SDS复配微乳液驱油体系性能研究

doi:10.13218/j.cnki.csdc.2018.01.003

Abstract

Abstract: In order to improve the recovery of low permeability crude oil reservoir,a series of tests and research work with respect to the use of blend surfactant composed of cetylsulfobetain (SB-16) and sodium dodecyl sulfate (SDS) were conducted.Results show that the suitable mass ratio of SB-16 and SDS is 7∶3 while the critical micelle concentration (cmc) is 0.025 g/L and the surface tension (γ_cmc) is 26.7 mN/m.Based upon such results,the effects of mass fraction of alcohols of different carbon chain length on the interfacial tension and emulsifying performance were studied.The study recommends that 4% mass fraction of the above-mentioned blend surfactant system+2% iso-butanol is the best formulation.Under these conditions,the interfacial tension of the oil and water can be reduced to the order of ultra-low interfacial tension (10^-3 mN/m).Experiments show that in the low permeability core,this microemulsion flooding system can improve crude oil recovery than the water flooding 10 percentage points.Obviously,the effect is better.

Key words: cetylsulfobetaine, sodium dodecyl sulfate, blend ratio, microemulsion flooding, interfacial tension

CLC Number:

TQ423

YIN Dai-yin, ZHONG Yu-cang. Performance of SB-16/SDS blend surfactant microemulsion flooding system[J].China Surfactant Detergent & Cosmetics, 2018, 48(1): 14-17.

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Performance of SB-16/SDS blend surfactant microemulsion flooding system

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