Method for predicting crude oil viscosity through nuclear magnetic resonance spectrums

Method for predicting crude oil viscosity through nuclear magnetic resonance spectrums

  • CN 105,004,745 A
  • Filed: 04/18/2014
  • Published: 10/28/2015
  • Est. Priority Date: 04/18/2014
  • Status: Active Grant
First Claim
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1. predicted a method for viscosity of crude by nuclear magnetic resoance spectrum, comprise the steps:

  • (1) get different types of crude oil sample, measure its viscosity number with standard method,(2) proton nmr spectra of above-mentioned each crude oil sample is measured, first differential process is carried out to spectrogram, to get chemical shift be 5.5 ~ 8.5ppm and the 1.0 ~ 3.7ppm peak intensity of composing district is associated with the logarithm of the corresponding viscosity measured with standard method, sets up calibration model by partial least square method(3) proton nmr spectra of crude oil sample to be measured is measured, first differential process is carried out to spectrogram, getting chemical shift is the peak intensity substitution calibration model that 5.5 ~ 8.5ppm and 1.0 ~ 3.7ppm compose district, obtains the viscosity logarithm value of crude oil sample to be measured, then is converted into viscosity.

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