Kerogen type classification method based on FTIR analysis

A type division and kerogen technology, applied in the application field of FTIR technology in the field of petroleum geology, can solve the problems of VanKrevelen diagram error, C-O bond breakage, extraction of relative content of C=O, etc., and achieve obvious application value, accuracy rate improvement, Analyze the effect of low cost
CN112014345AActive Publication Date: 2020-12-01CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2020-12-01

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Abstract

The invention relates to a kerogen type classification method based on FTIR analysis. According to the method, the difference of functional groups reflected by absorption peaks corresponding to different wave numbers of Fourier transform infrared (FTIR) is used; the characteristics of infrared spectrum absorption peaks of functional groups such as aliphatic hydrocarbon, aromatic hydrocarbon and oxygen in kerogen are established; the relative content of the functional groups is determined; the relative content of the functional groups can reflect the relative content of C, H and O in kerogen; therefore, the correlation between the relative content of O / C and H / C and the characteristic spectrum in kerogen infrared spectroscopy (FTIR) is constructed; and the organic matter type of kerogen isanalyzed through a normal form diagram, so as to judge the type of kerogen. The method has characteristics of simpleness, rapidness and low cost, has characteristics of no damage on a sample, less use amount and substantially improved accuracy, and has a significant application value.
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Description

technical field

[0001] The invention relates to a method for classifying kerogen types based on FTIR analysis, which belongs to the application of FTIR technology in the field of petroleum geology. Background technique

[0002] There are generally three-point, four-point and five-point methods for the classification of kerogen types. Among them, Tissot BP et al. (1978) proposed to divide kerogen into three types: I, II, and III, among which type I is called sapropel type, type II is sapropel humic type, and type III is humic type. The four-point method and the five-point method are subdivisions based on the three-point method (Yang Wanli, 1981; Huang Difan et al., 1984).

[0003] At present, the commonly used methods to determine the type of kerogen include kerogen microcomponent analysis, organic element analysis, organic carbon and pyrolysis chromatography analysis. The corresponding parameters or graphs are determined by methods such as TI index, paradigm graph (H / C, O / ...

Claims

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