GC*GC (comprehensive two-dimensional gas chromatography) method for hydrocarbons in crude oil or sedimentary organic matters

Abstract

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.

Description

Technical field [0001] The invention relates to a method for analyzing hydrocarbons in crude oil or sedimentary organic matter, in particular to a comprehensive two-dimensional gas chromatography analysis method (GC×GC-FID) for hydrocarbons in crude oil or sedimentary organic matter, and belongs to organic geochemistry in oil and gas exploration and development field. Background technique [0002] Crude oil or sedimentary organic matter is a complex, multi-component homogeneous mixture, the main composition is hydrocarbons (alkanes, cycloalkanes, aromatics), and a small amount of non-hydrocarbon components (sulfur, oxygen, nitrogen Compounds) and gums and asphaltenes. The chemical composition of crude oil or sedimentary organic matter, especially the hydrocarbon composition, preserves the information about the parent material and crude oil conversion products or the composition changes during crude oil extraction. Therefore, the chemical composition of crude oil or sedimentary o...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the relatively low reliability of one-dimensional gas chromatography (GC-FID) analysis of the presence of hydrocarbon compounds, column capacity, sensitivity, qualitative and quantitative reliability, few detection components, and an analytical method to detect In order to solve the problem of single types of geochemical parameters, a comprehensive two-dimensional gas chromatography analysis method (GC×GC- FID)

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