SURFACTANT MIXTURE SOLUTIONS INCLUDING POLYACRYLAMIDE POLYMERS AND SURFACTANT MIXTURES USED FOR CHEMICAL ENHANCED OIL RECOVERY
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United States of America
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Jan 9, 2025
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Jun 25, 2024
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Jun 25, 2024
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Abstract
A method for reducing the interfacial tension between a hydrocarbon fluid and a surfactant mixture solution during chemical enhanced oil recovery includes introducing a surfactant mixture solution to a hydrocarbon-bearing reservoir, thereby reducing the interfacial tension at a liquid-liquid interface of the hydrocarbon fluid and the surfactant mixture solution. The surfactant mixture solution includes a polyacrylamide polymer, a brine solution, and a surfactant mixture. The surfactant mixture includes an anionic surfactant, a cationic surfactant, and a nonionic surfactant. The anionic surfactant may include organosulfate. The cationic surfactant may include a quaternary ammonium, a brominated trimethylammonium, a chloride trimethylammonium, or combinations thereof. The nonionic surfactant may include a polyoxyethylene fatty acid ester, a phenylated ethoxylate, or combinations thereof.
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