Effects of Emulsification Conditions on the Rheological Properties of Heavy Oil－in－Water Emulsions

doi:10.3696/j.issn.1006-396X.2009.03.013

Journal of Petrochemical Universities ›› 2009, Vol. 22 ›› Issue (3): 51-54.DOI: 10.3696/j.issn.1006-396X.2009.03.013

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Effects of Emulsification Conditions on the Rheological Properties of Heavy Oil－in－Water Emulsions

1. Department of Oil & Gas Storage and Transportation Engineering, China University of Petroleum, 

Qingdao Shandong 266555, P. R. China;

2. Xi’an Changqing Technology Engineering Co., Ltd., Xi’an Shaanxi 710021, P. R. China

Received:2008-12-16 Revised:2009-05-23 Published:2009-09-25 Online:2009-09-25

乳化条件对O/W稠油乳液流变性的影响

杨飞¹,李传宪¹,林名桢¹,郭刚²

1.中国石油大学储运与建筑工程学院,山东青岛266555;
2.西安长庆科技工程有限责任公司,陕西西安710021

作者简介:杨飞(1978 -), 男, 山东惠民县, 讲师, 在读博士
基金资助:
国家863 计划资助项目(2006AA09Z302)。

Abstract

Abstract:

The effects of emulsification conditions (including oil/water volume ratio, emulsifier concentration, emulsifying temperature, emulsifying time and stirrer rotation speed) on the rheological properties of heavy oil-in-water emulsions were studied by using polarized-light microscope and control-stress rheometer. The results show that the droplet size and viscosity of heavy oil-in-water emulsions are increased by increasing oil/water volume ratio (1∶9~7∶3); however, when the oil/water volume ratio is high (8∶2), an emulsion inversion (from O/W to W/O) occurs, leading to a sharp increase of emulsion viscosity. With the increase of emulsifier concentration (0.5%~5%), the emulsion droplet size decreases while the emulsion viscosity decreases first, and then increases. When emulsifier concentrations are not reach to 4%, the emulsions are Newtonian fluids; the emulsion changes into non-Newtonian fluid when the emulsifier concentration reaches 5%. The emulsion droplet size and viscosity are decreased by increasing emulsifying temperature (40~70 ℃). When emulsifying temperatures is above 70 ℃, an emulsion inversion occurs due to the invalidation of emulsifier, causing a sharp increase of emulsion viscosity. With the increase of emulsifying time and stirrer rotation speed, the emulsion droplet size decreases while the emulsion viscosity increases. The non-Newtonian characteristics of the emulsions become obvious with increasing emulsifying time and stirrer rotation speed.

Key words: Heavy oil , Oil－in－Water emulsion , Emulsification conditions , Droplet size , Rheological properties

摘要： 通过采用偏光显微镜和控制应力流变仪，考察了油水体积比、乳化剂质量分数、乳化温度、乳化时间和搅拌机转速等乳化条件对O/W稠油乳液流变性的影响。实验结果表明，O/W稠油乳液的粒径和粘度随油水体积比(1:9～7:3)的增大均逐渐增大；但是，当油水体积比足够大时(8:2)，乳液转相为W/ O型，粘度急剧增大。随着乳化剂质量分数的提高(0 .5%～5% )，乳液粒径减小而粘度先减小再增大。当乳化剂质量分数≤4%时，乳液为简单的牛顿流体；增大乳化剂质量分数到5%导致乳液转变为具有一定结构特性的非牛顿流体。随着乳化温度的提高(40～70℃)，乳液粘度和粒径均减小；当乳化温度高于 70℃时，乳化剂失效导致乳液转相为 W/O型，乳液粘度急剧增大。随着乳化时间的增长和搅拌机转速的提高，乳液粒径减小、粘度增大，乳液的非牛顿流体特性也越来越显著。

关键词: 稠油 , O／W 乳状液 , 乳化条件 , 粒径 , 流变性

YANG Fei,LI Chuan-xian, LIN Ming-zhen,GUO Gang. Effects of Emulsification Conditions on the Rheological Properties of Heavy Oil－in－Water Emulsions[J]. Journal of Petrochemical Universities, 2009, 22(3): 51-54.

杨飞,李传宪,林名桢,郭刚. 乳化条件对O/W稠油乳液流变性的影响[J]. 石油化工高等学校学报, 2009, 22(3): 51-54.

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Effects of Emulsification Conditions on the Rheological Properties of Heavy Oil－in－Water Emulsions

乳化条件对O/W稠油乳液流变性的影响

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