METHOD FOR DETERMINING HYDROCARBON FLUID COMPOSITION Russian patent published in 2021 - IPC G01N30/68 G01N30/72 E21B49/00 

FIELD: oil industry.

SUBSTANCE: invention relates to a method for analyzing complex hydrocarbon fluids and can be used for analyzing oil and gas condensate. The invention relates to a method for determining the composition of hydrocarbon fluid, which comprises determining the density of hydrocarbon fluid and determining the composition of hydrocarbon fluid by gas chromatography combined with time-span mass-analyzer for hydrocarbon fluid densities of 0.85 g/ml or less combined with a flame ionization detector or with a quadrupole mass-analyzer for hydrocarbon fluid densities greater than 0.85 g/ml but not more than 0.96 g/ml. The invention also relates to a variant of a method for determining the composition of hydrocarbon fluid and to variants of systems for selecting a hydrocarbon fluid composition method.

EFFECT: technical result is increase in accuracy of determining the composition and producing a hydrocarbon fluid fingerprint, which in turn leads to an increase in the degree to which hydrocarbon fluids differ relative to each other.

36 cl, 12 dwg, 5 tbl, 4 ex