Precipitation and Redissolution of Sulfonates and Their Role in Adsorption on Minerals
The interaction of inorganic species, such as those of calcium and aluminum that are normally present in reservoir fluids, with surfactants is found to produce precipitation of the surfactants followed by their redissolution above the critical micelle concentration. A maximum is often observed in the adsorption isotherm of surfactants on reservoir rocks. The contribution of the surfactant precipitation/dissolution phenomenon to the occurrence of adsorption maximum has been investigated in this study using the kaolinite/sulfonate system. The magnitude of the adsorption maximum is found to be minimized when the precipitation/redissolution of the surfactant is taken into account, suggesting the important role of the latter phenomenon in determining the apparent adsorption.
KeywordsCritical Micelle Concentration Carbon Capture Reservoir Rock Polymer Flooding Sodium Dodecylbenzenesulfonate
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