Characterization of crude oil by near infrared spectroscopy
AssigneeSaudi Arabian Oil Company
InventorsOmer Refa Koseoglu, Adnan Al-Hajji
Life of this patent
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Abstract
A system and a method for calculating and assigning one or more indicative properties (e.g., cetane number, pour point, cloud point, aniline point) of a fraction of an oil sample based on an index calculated and assigned based on near infrared spectroscopy data of the sample.
Claims13
A system for assigning an indicative property to a fraction of an oil sample based upon near infrared spectroscopy data, the system comprising:
- a non-volatile memory device that stores calculation modules and data, the data including NIR spectroscopy data indicative of absorbance values of the crude oil solution for peaks detected in a predetermined wavenumber range for the oil sample;
- a processor coupled to the memory;
- a first calculation module that calculates a near infrared absorbance index of the fraction from the data indicative of absorbance values;
- and
- a second calculation module that calculates and assigns the indicative property of the fraction as a function of the near infrared absorbance index and density of the oil sample.
A system for assigning an indicative property to a fraction of an oil sample comprising:
- a near infrared spectrometer that outputs near infrared spectroscopy data;
- a non-volatile memory device that stores calculation modules and data, the data including NIR spectroscopy data indicative of absorbance values of the crude oil solution for peaks detected in a predetermined wavenumber range for the oil sample;
- a processor coupled to the memory;
- a first calculation module that calculates a near infrared absorbance index of the fraction from the data indicative of absorbance values;
- and
- a second calculation module that calculates and assigns the indicative property of the fraction as a function of the near infrared absorbance index and density of the oil sample.
A method for operating a computer to assign an indicative property to a fraction of an oil sample based upon near infrared spectroscopy data, the method comprising:
- entering into the computer near infrared spectroscopy data indicative of absorbance values of the crude oil solution for peaks detected in a predetermined wavenumber range for the oil sample;
- calculating and assigning a near infrared absorbance index of the fraction from the data indicative of absorbance values;
- and
- calculating and assigning the indicative property of a gas oil fraction as a function of the near infrared absorbance index and density of the oil sample.
A method for assigning an indicative property to a fraction of an oil sample comprising:
- obtaining near infrared spectroscopy data indicative of absorbance values of the crude oil solution for peaks detected in a predetermined wavenumber range for the oil sample;
- entering into a computer the obtained near infrared spectroscopy data;
- calculating and assigning a near infrared absorbance index of the fraction from the data indicative of absorbance values;
- and
- calculating and assigning the indicative property of a gas oil fraction as a function of the near infrared absorbance index and density of the oil sample.
Dependencies are inferred from the claim text.