Formation of fluid heavy oil-in-water emulsions for pipeline transportation
Formation of fluid heavy oil-in-water emulsions for pipeline transportation
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DOI：
10.1016/s0016-2361(98)00157-4
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发表时间：
1999-04-01
期刊：
影响因子：
7.4
通讯作者：
Gharieb, HK
中科院分区：
文献类型：
--
作者：
Ahmed, NS;Nassar, AM;Gharieb, HK
研究了影响表面活性剂稳定的稠油管输水包油乳状液粘度的各种因素。该研究公开了由非离子表面活性剂壬基酚乙氧基化物稳定的水包油乳液的稳定性随着表面活性剂浓度的增加而增加，随后原油-水界面张力（IFT）降低。采用淡水和合成地层水研究了水相矿化度对乳状液稳定性和粘度的影响。利用溶解在合成地层水中的表面活性剂来找出将表面活性剂注入井筒中以在泵或管道中实现乳化的可能性，用于生产作为水包油乳液的重质原油。（Geisum原油）减少时，它与水乳化的非离子表面活性剂的存在下，在水包油乳液的形式。用合成的地层水可以形成稳定的乳状液，其特征在于低动态剪切粘度。这将通过注入溶解在地层水中的表面活性剂来影响井下乳化来提高稠油的产量。此外，所生产的水包原油乳液的特征在于其低有效粘度，这将有助于其管道输送到精炼厂。(C)1999 Elsevier Science Ltd.保留所有权利。
The diverse factors affecting the viscosity of a surfactant stabilized viscous crude oil-in-water emulsion for pipeline transportation were studied. The study discloses that the stability of the oil-in-water emulsion stabilized by a nonionic surfactant Nonyl Phenol Ethoxylate increases as the surfactant concentration increases with a subsequent decrease in the crude-oil-water interfacial tension (IFT). Increasing the oil content and the speed of mixing of the emulsion resulted in an increased emulsion stability.Fresh water and synthetic formation water were used to study the effect of aqueous phase salinity on the stability and viscosity of the emulsion. Surfactant dissolved in synthetic formation water was utilized to find out the possibility of injecting the surfactant into a well bore to effect emulsification in the pump or tubing for the production of heavy crude oils as oil-in-water emulsion.The effective viscosity of a viscous Egyptian crude oil (Geisum crude oil) decreased when it was emulsified with water in the presence of a nonionic surfactant in the form of an oil-in-water emulsion. It was possible to form stable emulsions with synthetic formation water characterized by a low dynamic shear viscosity. This will enhance the production of viscous crude oils by injecting surfactant dissolved in formation water to affect downhole emulsification. Further, the produced crude oil-in-water emulsion is characterized by its low effective viscosity which will facilitate its pipeline transportation to the refiner. (C) 1999 Elsevier Science Ltd. All rights reserved.