Simultaneous determination of bitumen and water content in oil sand and oil sand extraction process samples using low-field time-domain NMR
US8547096B2 · kind B2 · utility
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Inventors
Key dates
| Filing date | Jun 24, 2010 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | May 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for quantifying bitumen and/or water in a sample comprising bitumen, water and solids using a time-domain nuclear magnetic resonance pulse spectrometer is provided comprising the steps of: initially saturating the magnetization of the sample so that essentially no magnetization remains in the +Z axis; subjecting the sample to a sequence of radio-frequency pulses optimized for the measurement of bitumen and water in the sample; allowing the recording of the transverse relaxation (T2) echo trains after incremental longitudinal relaxation to produce a raw TD-NMR data set for the sample; and determining the amount of bitumen and water by means of a partial least squares optimization based chemometric model relating TD-NMR data sets obtained from a training set of samples comprising bitumen, water and solids to the training samples' corresponding reference values obtained from a standard analysis method for determining bitumen and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.