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SIMULTANEOUS DETERMINATION OF BITUMEN AND WATER CONTENT IN OIL SAND AND OIL SAND EXTRACTION PROCESS SAMPLES USING LOW-FIELD TIME-DOMAIN NMR
SIMULTANEOUS DETERMINATION OF BITUMEN AND WATER CONTENT IN OIL SAND AND OIL SAND EXTRACTION PROCESS SAMPLES USING LOW-FIELD TIME-DOMAIN NMR
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机译:低场时域核磁共振法同时测定油砂和油砂提取过程样品中的比重和水分
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摘要
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.
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