The Criteria on Maturity of Organic Materials in Carbonate Rocks by Ion Microprobe
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摘要: 本文是运用离子探针（ＳＩＭＳ）进行滇黔桂地区海相碳酸盐岩油源对比和油气演化研究的实验成果。有机烃类ＣＨ/Ｃ，ＣＨ３/Ｃ比值的变化具有某种规律性，芳烃化合物苯系列同系物甲基比值大小则反映有机质成熟度变化，与镜质体反射率Ｒｏ具有良好线性关系。Abstract: he secondary ions of the hydrocarbon fragments suchas CH, CH3 and benzene series homologues,etc. can be detected by ion microprobe(SIM S) in the organic analysis of carbonate rocks. There is a close relationship of the peak and its abundance of these fragment ions with the themical com posi do nand molecular structure of the organic materials detected. There is certain regularity with the change ofCH/C and CH3 /C ratios which could reach the maximum at theoil forming period. And the value of themethyl ratio between arene compounds and benzene serial homologues can reflect the cha ng a of o rganicmatuity and shown good linear relationship vitrinite reflectance(R).This paper represented part of theexperimental results obtained during the study of the oil and soure rock correlation and oil-gas evolutionof marine carbonate rocks in the Yunnan, Guizhou and Guangxi area by using SIM S.
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Key words:
- organic materials /
- maturity /
- SIMS
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