Abstract
ABSTRACT A great deal of information has been published on the use of surfactants in CO2 foam flooding applications. However, generally the chemical composition of the surfactant has not been specified and little work describing the relationship of surfactant chemical structure and physical properties to foaming agent performance has been reported. This laboratory study examines the performance of more than 40 surfactants in 1 atmosphere foaming experiments. Several classes of surfactants were studied including alcohol ethoxylates, alcohol ethoxysulfates, alcohol ethoxyethylsulfonates and alcohol ethoxyglycerylsulfonates. Surfactants which performed well in the 1 atmosphere (1.01 X 105 Pa) foaming experiment were also good foaming agents in sight cell and core flood experiments1,2 performed in the presence of CO2 and reservoir fluids under realistic reservoir temperature and pressure conditions.
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