文献类型：期刊文献

英文题名：High-efficiency separation for SAGD produced liquids

作者：Qiao, Yue[1];Yang, Jingyi[1];Cai, Hao[1];Cheng, Peng[1];Xu, Xinru[1]

机构：[1]East China Univ Sci & Technol, Dept Petr Proc, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2016

卷号：145

起止页码：148

外文期刊名：JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING

收录：;EI(收录号：20161502233541);WOS:【SCI-EXPANDED(收录号:WOS:000381835600012)】；

语种：英文

外文关键词：Steam-assisted gravity drainage; Extra heavy oil; Zeta potential; W/O emulsion; Electric field demulsification

摘要：Demulsification of steam-assisted gravity drainage (SAGD)-produced liquid from the Xinjiang oil field was investigated in this study. The heavy crude oil in the produced liquid presents a high density, high viscosity, high resin and asphaltene contents, and high acid value. Thus, this liquid is difficult to separate. The effect of cationic deoiling agents on the separation of the SAGD-produced liquid was tested. W590 showed the highest separation efficiency among the deoiling agents surveyed. Zeta-potential experiments revealed that cationic deoiling agents could neutralize negative charges on the oil droplet surface and significantly reduce the oil content in the separated water. After the produced liquid was settled with 220 mg/L W590 at 90 degrees C for 1 h, the oil content in the water could be rapidly decreased to 198.0 mg/L and the water content in the produced liquid could be reduced from 86.2% to 22% to obtain a W/O emulsion. In the second process of separation, the demulsifier FC20 was applied. Under an electric field, the water content in the emulsion to which 30% diesel oil had been added could be reduced to 1.0% with 300 mg/L FC20, a 750 V/cm electric field for 20 min, and a settling time at 90 degrees C for 4 h. (C) 2016 Elsevier B.V. All rights reserved.