Journal
TENSIDE SURFACTANTS DETERGENTS
Volume 47, Issue 5, Pages 280-287Publisher
WALTER DE GRUYTER GMBH
DOI: 10.3139/113.110078
Keywords
Alkyl polyglycoside; sorbitan ester; cosurfactants; Span; Tween; ultra-low interfacial tension; enhanced oil recovery; surfactant flood; chemcial flood
Funding
- US Department of Energy [DE-FC26-01BC15362]
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We measured interfacial tensions (IFT) of aqueous alkyl polyglucoside (APG) systems formulated with sorbitan ester-type cosurfactants against n-octane. The study focused on low to ultra-low IFT systems which are relevant for enhanced oil recovery (EOR). In addition, we measured equilibrium adsorption concentrations of these surfactants and cosurfactants onto kaolinite clay, commonly found in oil reservoirs. We present one surfactant EOR laboratory flood experiment with one selected APG-sorbitan ester formulation with which we recovered 94% of initial oil in place (IOIP).
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