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(rη—NRe,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。
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（ηr—NRe,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.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2010年第6期1024-1026,1030,共4页
Acta Petrolei Sinica
基金
国家科技重大专项(2008ZX05026-004)
中国石油科技创新基金(2010D-5006-0604)联合资助
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
water-in-heavy-oil emulsion
non-Newtonian
dropsize distribution
Particle Reynolds number
shear thinning behavior
