Carbon Isotopic Characters of Monomer Hydrocarbons and Origin Analysis of Condensate Oils in Tarim Basin
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摘要: 对采自塔里木盆地不同地区和层位的１４个凝析油样进行了ＧＣ/Ｃ/ＭＳ在线（Ｏｎｌｉｎｅ）碳同位素分析，获得了液态烃系列单分子碳同位素组成资料。在此基础上，探讨了不同时代凝析油的单体烃碳同位素特征，并进行了油－油的对比与成因分类。结果表明，塔里木盆地存在煤成油、油型油与混合成因油三种类型。其中油型油又可按母岩的时代划分为奥陶系（寒武系）、石炭系、三叠系三种类型。煤成油的源岩为佛罗系煤系源岩。佐证了该盆地存在四套现实的烃源岩（即奥陶－寒武系、石炭系、三叠系和侏罗系）。Abstract: By analysing GC/C/MS on line carbon isotopes of 14 condensate oil smples from different areas and measures in the Tarim basin, we get carbon isotopic compositions of monomeric molecules of the liquid hydrocarbon system. Based on the data, we have discussed the carbon isotopic characters of monomeric molecules in condensate oils with different ages, and made oiloil comparison and origin classification. It shows that there are the coal-type oil, oil type oil and mixing type oil in Tarim basin, in which oil type oil can be divided into three sub-types by the age of source rocks: the Ordovician (Cambrian), Carboniferous and Triassic. The source rocks of the coal- type oil is Jurassic coal measures, showing the Tarim basin has 4 sets of practical source rocks (Ordovician - Cambrian, Carboniferous, Triassic and Jurassic).
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Key words:
- Monomeric carbon isotope /
- Condensate oil character /
- Origin Tarim Basin /
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[1] 1.张文正、裴戈、关德师、程坤芳，1993，中国几个盆地原油轻烃单体和正构烷烃系列分子碳同位素研究，地质论评，39(1):79-88。
2.张文正、裴弋、关德师、程坤芳，1993,烃源岩热解油的轻烃单体和正构烷烃分子碳同位素特征，石油学报，14(1):42-50。 -
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