Patent ID: 6420869
Filing Date: 2002-07-16
Classification: G01N,G01R,G01V

Abstract:
A method for predicting NMR values T1, T2 from NIR spectra for a down hole hydrocarbon sample comprising the steps for:(a) measuring NMR decay time values T1, T2 for a plurality of known hydrocarbon samples; (b) measuring NIR absorbance spectra for the plurality of known hydrocarbon samples; (c) generating a correlation between the NMR decay time values T1, T2 and the absorbance spectra for the known hydrocarbon samples; (d) measuring the NIR spectra for an unknown hydrocarbon sample taken down hole; and (e) predicting the NMR decay time values T1, T2 for the unknown hydrocarbon sample using the correlation between the NMR decay time values T1, T2 and NIR spectra.