Method for predicting crude oil characteristic through near infrared spectrum
A technology of near-infrared spectroscopy and crude oil, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problem of wide range of sample variation, achieve the effect of simplifying data processing, improving calculation speed, and accurate prediction results
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[0067] Example 1
[0068] Predict crude oil properties according to the method of the invention.
[0069] (1) Establish a near-infrared spectrum database of crude oil samples
[0070] Collected 458 representative crude oil samples, crude oil varieties basically cover the world's major crude oil producing areas. Measure the near-infrared spectrum of crude oil samples, select 7000~4000cm -1 The absorbance in the spectral range is subjected to second-order differential processing to establish a crude oil sample near-infrared spectrum matrix X 779×458 , Where 458 is the number of crude oil samples and 779 is the number of data points in the near-infrared spectrum.
[0071] Determine crude oil density, viscosity at 50°C, freezing point, acid value, residual carbon, sulfur, wax, gum, asphaltene, metallic nickel and metallic vanadium content, and real boiling point distillation data (TBP, accumulation of 23 temperature points) by conventional methods Quality yield: 65℃, 80℃, 100℃, 120℃, 14...
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