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Development of a Methodology for the Optimization of Dehydration of Extra-Heavy Oil Emulsions.pdf

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Development of a Methodology for the Optimization of Dehydration of Extra-Heavy Oil Emulsions

SPE 121669 Development of a Methodology for the Optimization of Dehydration of Extra-Heavy Oil Emulsions C. Dalmazzone, SPE, and C. No?k, SPE, IFP, and P. Glénat and F. Dang, Total Copyright 2009, Society of Petroleum Engineers This paper was prepared for presentation at the 2009 SPE International Symposium on Oilfield Chemistry held in The Woodlands, Texas, USA, 20–22 April 2009. This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Electronic reproduction, distribution, or storage of any part of this paper without the written consent of the Society of Petroleum Engineers is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of SPE copyright. Abstract With the increasing development of heavy and extra-heavy oil fields, separation operations are becoming more and more challenging compared to separation for conventional oil fields. For in situ bitumen Extra Heavy Oils produced thanks to thermal process, dehydration requires solvent addition, injection of large amount of demulsifier additives, relatively high operating temperature, and long retention times inside the separators. So in order to respect specifications on crude oil and water quality at the lower cost, an optimization of the different parameters involved in the whole process of separation becomes necessary. In the case of extra-heavy oils, the presence of polar heavy components, such as asphaltenes, structured as a rigid film at the water/oil interface, limits the coalescence phenomena and consequen