US 11,913,332 B2
Method to prepare virtual assay using fourier transform infrared spectroscopy
Omer Refa Koseoglu, Dhahran (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Feb. 28, 2022, as Appl. No. 17/682,011.
Prior Publication US 2023/0272714 A1, Aug. 31, 2023
Int. Cl. E21B 49/08 (2006.01); G01N 21/35 (2014.01); G16C 20/30 (2019.01); G01N 33/28 (2006.01)
CPC E21B 49/08 (2013.01) [G01N 21/35 (2013.01); G01N 33/2823 (2013.01); G16C 20/30 (2019.02); G01N 2021/3595 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing a virtual assay of an oil sample, wherein the oil sample is characterized by a density, selected from the group consisting of crude oil, bitumen and shale oil, and characterized by naphtha, gas oil, vacuum gas oil and vacuum residue fractions, the method comprising:
entering into a computer Fourier transform infrared (FTIR) spectroscopy data indicative of transmittance over a range of wavenumbers for the oil sample without distillation;
calculating and assigning, as a function of the FTIR spectroscopy data, an analytical value (AV); and
calculating and assigning, as a function of the AV and the density of the oil sample, virtual assay data of the oil sample and the naphtha, gas oil, vacuum gas oil and vacuum residue fractions, said virtual assay data comprising a plurality of assigned data values.