石油学报 ›› 2010, Vol. 31 ›› Issue (6): 1024-1026.DOI: 10.7623/syxb201006027

• 石油工程 • 上一篇    下一篇

非牛顿稠油包水乳状液的剪切稀释性

王  玮 1,2  宫  敬 1  李晓平 1   

  1. 1 中国石油大学城市油气输配技术北京市重点实验室  北京  102249; 2 中国石油天然气管道局博士后科研工作站  河北廊坊  065000
  • 收稿日期:2010-03-18 修回日期:2010-07-15 出版日期:2010-11-25 发布日期:2011-01-20
  • 通讯作者: 王 玮
  • 作者简介:王 玮,男,1982年5月生,2009年获中国石油大学(北京)博士学位,现为中国石油天然气管道局在站博士后,主要从事油气水多相混输技术的研究。
  • 基金资助:

    国家科技重大专项 (2008ZX05026-004)和中国石油科技创新基金(2010D-5006-0604)联合资助。

Shear thinning behaviors of non-Newtonian water-in-heavy-oil emulsions

WANG Wei 1, 2  GONG Jing 1  LI Xiaoping 1   

  • Received:2010-03-18 Revised:2010-07-15 Online:2010-11-25 Published:2011-01-20

摘要:

以现场稠油和矿化水为工质,制备了多组不同微观液滴分布的W/O型乳状液,结合显微镜观察及测量分析,获得了对稠油包水乳状液微观液滴分布及非牛顿性的定量分析。结果表明,随微观液滴直径的减小,乳状液体系将具有更高的表观黏度,并表现出更强的剪切稀释性;结合颗粒雷诺数(ηrNRe,p 关系),能够很好的表征剪切率及微观液滴分布对稠油包水乳状液剪切稀释性的共同影响。

关键词: 稠油包水乳状液, 非牛顿性, 微观液滴分布, 颗粒雷诺数, 剪切稀释性

Abstract:

Various water-in-oil emulsions with different dropsize distributions were prepared at different mixing speeds and phase fractions by using heavy crude oil and mineral water directly from an oilfield.Integrated with the observation and measurement of liquid droplets under microscope,their distributions in water-in-oil emulsions and the corresponding non-Newtonian behaviors were statistically analyzed.The Particle Reynolds number (NRe,p ) was combined and further investigations were carried out on the relative viscosity (ηr ) of non-Newtonian emulsions.The results indicated that the emulsion system would have a higher apparent viscosity with the decrease in diameters of liquid droplets and show stronger shear thinning behaviors.Integration of the relation between the relative viscosity and the Particle Reynolds number (ηrNRe,p) would well represent the co-effect of the shear rate and the dropsize distribution on shear thinning behaviors of water-in-heavy-oil emulsions involved in this study.

Key words: water-in-heavy-oil emulsion, non-Newtonian, dropsize distribution, Particle Reynolds number, shear thinning behavior