Demulsifier Effectiveness in Treating Heavy Oil Emulsion in the Presence of Fine Sands in the Production Fluids

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• 作者：Chandra W. Angle ; Tadeusz Dabros ; Hassan A. Hamza
• 刊名：Energy & Fuels
• 出版年：2007
• 出版时间：March 2007
• 年：2007
• 卷：21
• 期：2
• 页码：912 - 919
• 全文大小：2270K
• 年卷期：v.21,no.2(March 2007)
• ISSN：1520-5029

文摘

Surface-active chemicals (e.g., demulsifiers) are frequently used to destabilize crude oil emulsion. It wasobserved that, in some instances, when mineral solids were present, heavy oil emulsions were difficult totreat. Using three-phase contact angle measurements and videomicroscopy, the reasons behind the ineffectivenessof some demulsifiers were determined. It was found that adsorption of the surfactant onto solids changes thewettability of the solids, and promotes adhesion of the oil droplets to the solids thus reducing the effectivedensity difference between the oil and the water, and hindering oil-water separation.