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2020•SPE Nigeria Annual International Conference and ExhibitionOpen access

Experimental Studies on the Performance of Bio Based and Industrial Surfactants in Enhanced Oil Recovery

Damilola Abraham, Oyinkepreye D. Orodu, Vincent Enon Efeovbokhan, Emeka Emmanuel Okoro, Temiloluwa Ojo, Lekan Keshinro

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Abstract

Abstract Surfactants are known for their unique property in lowering the interfacial tension (IFT) amid fluids injected and heavy crude oil of 22.3°API. In this present work, an original surfactant was formulated from natural oil (Castor oil) to see its use in enhanced oil recovery. The results from interfacial tension reduction by the castor oil-based surfactant were compared to that of the industrial surfactant (Methyl ester sulfonate). The IFT between the aqueous phases was measured then the effect of the surfactants was studied in core flooding experiments. The IFT was found to be reduced to as low as 12.1 mN/m using the castor-based surfactant and 12.3 mN/m using the industrial surfactant. The influence of brine concentration on IFT was also investigated. Results from core floods showed that the range of oil recovery after waterflood is in the range of 30-40% and the additional recovery from surfactant flooding in the range of 35-46%.

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Abstract Surfactants are known for their unique property in lowering the interfacial tension (IFT) amid fluids injected and heavy crude oil of 22.3°API. In this present work, an original surfactant was formulated from natural oil (Castor oil) to see its use in enhanced oil recovery. The results from interfacial tension reduction by the castor oil-based surfactant were compared to that of the industrial surfactant (Methyl ester sulfonate). The IFT between the aqueous phases was measured then the effect of the surfactants was studied in core flooding experiments. The IFT was found to be reduced to as low as 12.1 mN/m using the castor-based surfactant and 12.3 mN/m using the industrial surfactant. The influence of brine concentration on IFT was also investigated. Results from core floods showed that the range of oil recovery after waterflood is in the range of 30-40% and the additional recovery from surfactant flooding in the range of 35-46%.

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Available abstract

Abstract Surfactants are known for their unique property in lowering the interfacial tension (IFT) amid fluids injected and heavy crude oil of 22.3°API. In this present work, an original surfactant was formulated from natural oil (Castor oil) to see its use in enhanced oil recovery. The results from interfacial tension reduction by the castor oil-based surfactant were compared to that of the industrial surfactant (Methyl ester sulfonate). The IFT between the aqueous phases was measured then the effect of the surfactants was studied in core flooding experiments. The IFT was found to be reduced to as low as 12.1 mN/m using the castor-based surfactant and 12.3 mN/m using the industrial surfactant. The influence of brine concentration on IFT was also investigated. Results from core floods showed that the range of oil recovery after waterflood is in the range of 30-40% and the additional recovery from surfactant flooding in the range of 35-46%.

Key concepts: Pulmonary surfactant, Surface tension, Enhanced oil recovery, Castor oil, Brine, Residual oil, Chemical engineering, Aqueous solution

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