期刊
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷 145, 期 -, 页码 711-722出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.petrol.2016.06.040
关键词
Agbabu bitumen; Water-in-oil emulsions; Oil-in-water emulsions; Rheological property; Viscosity-pressure-temperature correlation; Rheological model
资金
- TETFund/Obafemi Awolowo University, Nigeria
- Society of Petroleum Engineers (SPE)
- REPs Laboratory, Kyushu University, Japan
- Kuraray Co., Ltd., Japan
The viscosity of a compressed Nigerian bitumen was measured over a temperature range of 85 degrees C to 150 degrees C. It was found that the viscosity at 85 degrees C and atmospheric pressure, increased from 1894 mPa s to 2787 mPa s at 7 MPa. At the temperature of 150 degrees C, the viscosity increased from 65 mPa s (at atmospheric pressure) to 71 mPa s at 7 MPa. Water-in-oil and oil-in-water emulsions were formed in a microreactor. The viscosity of original oil at 60 C and shear rate of 0.14 s(-1) increased from 34,535 mPa s to 46,130, 59,867, and 71,912 mPa s due to the formation of water-in-oil emulsions containing 15%, 35% and 55% w/ w water dispersed in the oil phase, respectively. On the other hand, the viscosity at the same condition was found to have decreased to 239.9 mPa s and 1260 mPa s as a result of 55% and 70% w/w oil particle dispersed in the alcoholic-caustic solution containing hydrophilic polymeric surfactant. The flow activation energy Ea decreased with increasing water fraction (increased viscosity) for W/O emulsions and increased with increasing water fraction (decrease in viscosity) for O/W emasions. Moreover, viscosity prediction models have been developed and verified using the experimental data. (c) 2016 Elsevier B.V. All rights reserved.
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