Rheological behavior of heavy crude oil and its emulsions

The rheological behavior and start-up characteristic of heavy oil emulsions for shutdown pipeline have been studied. To illustrate the properties, we examined the relationship between start-up stress and apparent viscosity. The oil-water ratio, surfactant concentration, start-up temperature and cons...

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Bibliographic Details
Published in:Petroleum science and technology 2020-03, Vol.38 (5), p.440-446
Main Authors: Jing, Jiaqiang, Wang, Shuai, Ling, Aijun, Yuan, Liang, Zhang, Ming, Yin, Ran
Format: Article
Language:English
Subjects:
Crude oil
Emulsions
heavy oil
Heavy petroleum
rheological behavior
Rheological properties
Rheology
Shear stress
shutdown pipeline
Shutdowns
start-up stress
Viscosity
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Summary:The rheological behavior and start-up characteristic of heavy oil emulsions for shutdown pipeline have been studied. To illustrate the properties, we examined the relationship between start-up stress and apparent viscosity. The oil-water ratio, surfactant concentration, start-up temperature and constant shear rates on start-up maximum stress were investigated and a new start-up pressure model was established. The results indicate that start-up stress and apparent viscosity have a consistent change with time. Equilibrium shear stress could be used to predict start-up pressures. The calculated values were in good agreement with experiment ones, which the absolute relative error is less than 10.0%.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2020.1727502