2016年10月第35卷第5期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.3969/J.ISSN.1000-3754.2016.05.024
Oct，2016 Vel. 35 No. 5
脂肪醇聚氧丙烯醚对CO，驱最小混相压力的影响
王芳罗辉任玉飞范维玉梁明南国枝
（中国石油大学重质油国家重点实验室，山东青岛266580）
摘要：研究开发适于在超临界CO，中形成稳定胶束的非离子表面活性剂，是降低CO，驱最小混相压力的技术关键。采用下悬滴法，研究超临界CO，与模拟油之间的界面张力，利用直线外推法计算CO，驱最小混相压力。考察了脂肪醇聚氧丙烯醚以及醇类助剂对CO,/Oil最小混
相压力的影响规律，并确定其最佳用量。结果表明：月桂
醇聚氧丙烯醚可大幅度降低超临界CO,/Oil最小混相压力
随着用量的增加，超临界CO,/Oil最小混相压力先减
步降低超临界CO,/Oil最小混相压力，随着添加量的增加，超
小后略微增大，且存在最优值：助剂乙醇可以进
临界CO,/Oil之间的最小混相压力先减小后略微增大；随着醇类助剂碳链长度的增加，超临界CO,/Oil混相压力先减小后增大，乙醇降低CO，驱混相压力的效果最明显。
关键调：超临界CO,；脂肪醇聚氧丙烯醚；最小混相压力；醇类助剂；添加量
中图分类号：TE367
文献标识码：A
文章编号：1000-3754（2016）05-0118-05
INFLUENCESOFFATTYALCOHOLPOLYOXYPROPYLENEETHERON
THEMINIMUMMISCIBILITYPRESSUREOF
CARBONDIOXIDEFLOODING
WANG Fang, LUO Hui, REN Yufei, FAN Weiyu, LIANG Ming, NAN Guozhi
(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Qingdao 266580,China)
Abstract: The development of the stable and micellar non-ionic surfactant produced in the state of supercritical carbon dioxide is the technical key to reduce the minimum miscibility pressure of CO, flooding. With the help of un-derslung pendant-drop method, the interfacial tension between the supercritical CO, and simulated oil is studied. In addition, the minimum miscibility pressure of CO, flooding is calculated by straight-line extrapolation. The influence laws are investigated for the fatty alcohol polyoxypropylene ether and alcohol additives on the minimum miscibility pressure between the CO, and oil, and furthermore the optimal usage is determined. The results show that the laur-yl-alcohol polyoxypropylene ether can reduce the minimum miscibility pressure of the supercritical CO, and oil to a great deal, with the rise of the usage, the above minimum miscibility pressure decreases first and then increases slowly, and moreover there is the optimal value; the promoting alcohol can further reduce this pressure, with the increase of the amount, the pressure first decreases and later increases slightly; while with the carbon chain length rise of the additive, the miscibility pressure decreases first then increases, the effects of the alcohol are most obvi-
收稿日期：2015-09-10
改回目期：2015-12-06
基金项自：中国博士后科学基金项目“亲CO，表面活性剂的设计、合成及降低CO，驱混相压力研究”（2014M551987)。作者简介：王芳，女，1992年生，在读硕士，主要从事油田化学与提高采收率研究。
E-mail:wangfang12130@163.com
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