Characterization of crude oil by ultraviolet visible spectroscopy
AssigneeSaudi Arabian Oil Company
InventorsOmer Refa Koseoglu, Adnan Al-Hajji, Gordon Jamieson
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Abstract
A system and a method for determining one or more distillation temperatures for one or more given distillation weight percentages of a crude oil sample are provided, which can be used to produce a simulated distillation curve. Simulated distillation temperatures of crude oil samples are assigned as a function of density and data derived from UV/Visible spectroscopy measurement of the crude oil samples.
Claims9
A system for assigning a distillation temperature for a given distillation weight percentage to a fraction of an oil sample based upon UV/Visible spectroscopy data, the system comprising:
- a non-volatile memory device that stores calculation modules and data, the data including UV/Visible 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 and assigns a cumulative and normalized UV/Visible absorbance for the given distillation weight percentage from the data indicative of absorbance values;
- and
- a second calculation module that calculates and assigns a simulated distillation temperature of the fraction as a function of the UV/Visible absorbance for the given distillation weight percentage, and density of the oil sample.
A system for assigning a distillation temperature for a given distillation weight percentage to a fraction of an oil sample comprising:
- an ultraviolet visible spectrometer that outputs ultraviolet visible spectroscopy data derived from the oil sample,
- a non-volatile memory device that stores calculation modules and data, the data including UV/Visible 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 and assigns a cumulative and normalized UV/Visible absorbance for the given distillation weight percentage from the data indicative of absorbance values;
- and
- a second calculation module that calculates and assigns a simulated distillation temperature of the fraction as a function of the UV/Visible absorbance for the given distillation weight percentage, and density of the oil sample.
A method for operating a computer to assign a distillation temperature for a given distillation weight percentage to a fraction of an oil sample based upon near infrared spectroscopy data, the method comprising:
- entering into the computer UV/Visible 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 cumulative and normalized UV/Visible absorbance for the given distillation weight percentage from the data indicative of absorbance values;
- and
- calculating and assigning a simulated distillation temperature of the fraction as a function of the UV/Visible absorbance for the given distillation weight percentage, and density of the oil sample.
A method for assigning assign a distillation temperature for a given distillation weight percentage to a fraction of an oil sample, the method comprising:
- obtaining UV/Visible 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 UV/Visible spectroscopy data;
- calculating and assigning a cumulative and normalized UV/Visible absorbance for the given distillation weight percentage from the data indicative of absorbance values;
- and
- calculating and assigning a simulated distillation temperature of the fraction as a function of the UV/Visible absorbance for the given distillation weight percentage, and density of the oil sample.
Dependencies are inferred from the claim text.