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Oil-water interfacial tension, wettability alteration and foaming studies of natural surfactant extracted from Vernonia Amygdalina

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Petroleum Research 2022年第3期7卷 350-356页

作者： Happiness Imuetinyan Augustine Agi Afeez Gbadamosi Radzuan Junin jeffrey osehd Department of Petroleum Engineering College of Engineering and TechnologyFederal University of Petroleum ResourcesEfurunNigeria Department of Petroleum Engineering School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310Skuda JohorMalaysia Center for Integrative Petroleum Research King Fahd University of Petroleum and MineralsDhahran31262Saudi Arabia Department of Petroleum Engineering Federal University of Technology OwerriNigeria

Surfactant flooding is an enhanced oil recovery(EOR)method for recovering residual oil in the reservoir through mechanism of interfacial tension(IFT)reduction and wettability *** to toxicity and high cost associated with conventional surfactants,recent research has focussed on developing low-cost and environmentally benign ***,a low-cost green surfactant is extracted from Vernonia Amygdalina(VA)and appraised for EOR *** extracted surfactant was characterized using Fourier Transform Infrared(FTIR)and High-Pressure Liquid Chromatography(HPLC).The IFT of the synthesized surfactant at the oil-water interface was determined using Kruss ***,the foam stability of the synthesized surfactant was ***,the wettability of the saponin based natural surfactant(SBNS)at the rock-fluid interface was analysed using Dataphysics drop shape *** result revealed that SBNS(1 wt%concentration)stabilized foam for longer periods with half-life of 1100 ***,the synthesized surfactant was effective in lowering the IFT of oil-water interface from 18 mN/m to 0.97 mN/***,SBNS altered the wettability of sandstone cores to water-wetting condition by reducing the contact angle from 118.5° to 45.7°.Overall,SBNS exhibit excellent properties desirable for EOR and thereby recommended as supplementary alternative to conventional surfactants.

关键词： Enhanced oil recovery Surfactant Interfacial tension Wettability Saponin Foam

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