Correlation of chemical and physical properties of an Alaska heavy oil from the Ugnu formation

► An heavy oil from a test well in the Ugnu formation, Alaska, was fully characterized for the first time. ► Molecular beam mass spectrometry, IR, and NMR were used to characterize the heavy oil. ► It was shown that chemical information lead to a good rapid prediction of heavy oil viscosity. Physica...

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Bibliographic Details
Published in:Fuel (Guildford) 2013-01, Vol.103, p.843-849
Main Authors: Li, Kejing, Akeredolu, Babajide A., Renehan, Andrew M., Yang, Yuan, Batzle, Michael, Evans, Robert J., Dorgan, John R., Liberatore, Matthew W., Herring, Andrew M.
Format: Article
Language:English
Subjects:
Aliphatic compounds
Alkylbenzene
Applied sciences
Correlation
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fourier transforms
FTIR
Fuels
Heavy oil
Infrared spectroscopy
Molecular beam mass spectrometry
Molecular beams
Nuclear magnetic resonance
Physical properties
Shear tests
Viscosity
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Summary:► An heavy oil from a test well in the Ugnu formation, Alaska, was fully characterized for the first time. ► Molecular beam mass spectrometry, IR, and NMR were used to characterize the heavy oil. ► It was shown that chemical information lead to a good rapid prediction of heavy oil viscosity. Physical properties and chemical components of an Alaska heavy oil from the Ugnu formation were studied by viscosity measurements, molecular beam mass spectrometry (MBMS), Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance spectroscopy (NMR). The viscous samples rheology was measured between −10°C and 60°C using small amplitude oscillatory shear tests for viscosity, which generally decreases with increasing temperature. An activation energy of viscosity was measured as between 85 and 92kJ/mol. The screening method by combined use of FTIR, NMR and a time-resolved MBMS identified several component classes: water, cyclo/straight alkanes, alkenes, mono and multi-ring aromatic molecules, as well as small fractions of other organic molecules. Azeotropic behavior was observed between 100 and 250°C. The partial least squares correlation between molecular masses and the viscosity shows that water, alkylbenzene, and molecules with higher masses have positive correlations to the viscosity, but that the aliphatic molecules were anti-correlated.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2012.07.037