The invention discloses a GC*GC (comprehensive two-dimensional
gas chromatography) method for hydrocarbons in
crude oil or sedimentary organic matters. The method is implemented through directly carrying out analysis on
crude oil or sedimentary
organic matter samples by using GC*GC-FID (GC*GC-
flame ionization detection) so as to obtain data of hydrocarbons (saturated hydrocarbons, aromatic hydrocarbons and the like); and by using GC*GC-TOFMS (GC*GC-time-off-flight
mass spectrometer)
software and methods and comprehensive two-dimensional gas chromatographic
hydrocarbon separation characteristic determinations, carrying out calculation on the data so as to obtain the localization parameters of saturated hydrocarbons and aromatic hydrocarbons. The method disclosed by the invention is validated through taking the GC*GC on
crude oil and sedimentary
organic matter samples in the Saertu Oilfield in Daqing, the fangzheng fault depression of the
peripheral basin, and the Hailer-Tamtsag Basin as examples. The GC*GC method for hydrocarbons in crude oil or sedimentary organic matters disclosed by the invention creates a new method for analyzing hydrocarbons in crude oil or sedimentary organic matters, and has important significances in deep understanding of the oil
pool forming process, migration, accumulation, preservation, oil and
source rock correlation of crude oil and the geochemical researches on oil pools, exploration of new geochemical indicators of crude oil and the exploration and development of crude oil.