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Title: New results on the application of alkaline water flooding to high acidity crude oil
Authors: Sayyouh, M.H.
Abdel-Waly, A.
Awara, A.Z.
Osman, A.
Keywords: Alkaline Water Flooding
Crude Oil
Issue Date: 1990
Publisher: King Saud University
Citation: Journal of King Saud University, Engineering Sciences: 9(2): 309-330
Abstract: Abstract. The main objective of this work was to study the enhanced recovery of a high acidity crude oil (South Geisum crude) by alkaline solutions. Different properties of South Geisum crude oil, namely acid¬ity, mterfacial tension, and contact angle were investigated. Displacenu ml tests were carried tnit to study the effect of alkaline slug concentration, slug size, alkali type, temperature and viscosity on recovery. South Geisum crude oil is a highly acidic crude (4.38 mg KOH/g). It was found thai the interfadaJ ten¬sion between this crude oil and formation water decreases with increasing alkaline concentration until it teaches a minimum, after which il increases again with further increase in alkaline concentration. Ii.it. cial tension between crude oil and displacement water also decreases with increasing alkaline conccntra tion. Contact angle measurements indicated oil-wclting conditions which increase by the addition of alkaline solutions. Displacement floods in a 5-spot quadrant showed thai. at the early stages of displace¬ment oil recovery increases with increasing alkaline concentration until it reaches a maximum at 4% by weight NaOH concentration. Abo. at such early stages, an excessive increase in alkaline concentration results in Inwer oil recovery ()n the other hand. jftti the injection ot many pore volumes of water, oil recovery is almost the same regardless of the alkaline concentration. It was found abo that the oil recovery increases with increasing alkaline slug size until it reaches; a maximum at 15% PV after which increasing slug size results in decreasing oil recovery (this result has not yet been reported in the literature). Sodium hydroxide slugs produce more oil recovery than sodium carbonate slugs. Oil recovery increases with increasing temperature and decreasing oil viscosity.
Description: College of Engineering, King Saud University, P.O.Box 800, Riyadh-11451, Saudi Arabia and 'Faculty of Engineering, Cairo University, Giza, Egypt
URI: http://hdl.handle.net/123456789/1791
Appears in Collections:Journal of the King Saud University - Engineering Sciences

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