Nontoxic low-cost amines as wettability alteration chemicals in carbonates

Abstract It is possible to improve the oil recovery from low temperature, oil-wet/neutral-wet, fractured carbonate reservoirs by spontaneous imbibition of water using nontoxic low-cost primary amines, R–NH2, as wettability alteration chemicals added to the injection water. The present paper discusses possible limitations in the performance of the chemicals such as solubility, pH, carbonate dissolution, and temperature effects. It was observed that C10-amine was compatible with high salinity brine at pH

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