G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/28 (2006.01)
Patent
CA 2597809
The present invention is directed to the measurement of viscosity and density in crude oil and in particular in solvent recovered bitumen from convention core, drill cuttings or other reservoir samples. The process comprises the steps of extracting oil from a sample using a polar volatile solvent; adding a second solvent selected to prevent light end loss from the oil during removal of the extraction solvent and to facilitate the complete removal of the extraction solvent; sequentially and partially removing the second solvent from a series of samples of the bitumen extract; analyzing the resulting suite of samples for viscosity, and extrapolating the data to zero solvent content to determine the viscosity of the solvent-free, unaltered oil in the core or other reservoir sample. By using selected solvents and methods such as gas chromatography or gas chromatography mass spectrometry (GCMS), the present method accurately estimates solvent- free viscosity and density of bitumen that has been solvent extracted from core. Solvent contents can also be determined using other methods including spectroscopic methods such as infrared or UV/visible spectroscopy.
Adams Jennifer Jane
Bennett Barry
Gates Ian
Jiang Dennis
Larter Stephen
Borden Ladner Gervais Llp
Gushor Inc.
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