US 12,455,274 B2
Method for determining the provenance of an oil sample using geochemical allocation
Gabriel Ignacio Horowitz, Ciudad Autónoma de Buenos Aires (AR); Martín Fasola, Ciudad Autónoma de Buenos Aires (AR); Romina Milicich, Ciudad Autónoma de Buenos Aires (AR); Ricardo Maronna, Ciudad Autónoma de Buenos Aires (AR); and Santiago Wiedmann, Ciudad Autónoma de Buenos Aires (AR)
Assigned to YPF TECNOLOGÍA S.A., Ciudad Autónoma de Buenos Aires (AR)
Filed by YPF TECNOLOGÍA S.A., Ciudad Autónoma de Buenos Aires (AR)
Filed on Sep. 30, 2022, as Appl. No. 17/958,135.
Claims priority of provisional application 63/251,268, filed on Oct. 1, 2021.
Prior Publication US 2023/0104694 A1, Apr. 6, 2023
Int. Cl. G01N 33/24 (2006.01); G01N 30/86 (2006.01)
CPC G01N 33/241 (2013.01) [G01N 30/86 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A computer-implemented method for determining the provenance of a sample comprising a mixture of hydrocarbons obtained from production of a well, the method comprising the steps of:
a) collecting a plurality of pure samples from different geological levels in the well, wherein each of said pure samples comprises a mixture of hydrocarbons representative of a corresponding geological level;
b) determining a value of a property in each of the pure samples collected in step a), wherein determining the value of the property in each of the pure samples collected in step a) comprises subjecting each of the pure samples to a gas chromatography analysis;
c) determining a value of the property in the sample, wherein determining the value of the property in the sample comprises subjecting the sample to a gas chromatography analysis; and
d) calculating a contribution of each geological level to the sample, by solving a system of equations relating the values of the property in each of the pure samples collected in step a) determined in step b) to the value of the property in the sample determined in step c) using linear discriminant analysis,
wherein both the sample and the pure samples are obtained from one of produced oil, co-produced gas or co-produced water.