| 摘要: |
| 综合运用同位素质谱、色谱、色谱-质谱技术手段研究了塔东2井寒武系稠油分子化石特征。结果表明，塔东2 井寒武系稠油具高伽马蜡烷、高Ca甾烷、低重排甾烷和高C?-三芳甾烷的特征，与寒武系-下奥陶统烃源岩的分子化 石特征类似，说明塔东2井寒武系原油源自寒武系-下奥陶烃源岩;塔东2井稠油中检出高丰度的稠环化合物(荧蒽、芘、苯并[a]蒽、屈、苯并荧蒽、苯并芘)，全油的碳同位素值明显偏重,揭示了原油烃类经热蚀变发生稠化。 |
| 关键词: 分子化石 油-岩对比 热蚀变 稠油 塔里木盆地 |
| DOI： |
| 分类号: |
| 基金项目:国家“973”重点基础研究发展规划项目(2006CB202303) |
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| Molecular fossils and oil-source rock correlations of Cambrian heavy oil in Tadong 2 well in Tarim Basin |
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TANG You-jun1,2,3,WANG Tie-guan1
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(1.Key Laboratory for Petroleum Accumulation, China University of Petroleum t Beijing 102249, China;2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University tJingzhou 434023，Hubei Province, China ;3. Department of Geochemistry, Yangtze University，Jingzhou 434023, Hubei Province, China)
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| Abstract: |
| The molecular fossils characteristics of Cambrian heavy oil in Tadong 2 well were studied by the synthetic methods such as carbon isotope, GC and GC-MS. The results show that the Cambrian heavy oil is noted for its abundance of gammac-erane, CM sterane and triaromatic sterane and the indigence of dissterane，which are conformed with the molecular fossils characteristics of the Cambrian and lower Ordovician source rock. This shows that the Cambrian oil in Tadong 2 well has genetic relationship with the Cambrian and lower Ordovician source rock. Densification with hydrocarbon thermal alteration was indicated by the polycyclic aromatic hydrocarbon with high abundance : fluoranthene，Pyrene，Benzo [ a ] anthracene, Chrysene, Benzo Fluoranthene and Benzo pyrene, and the obvious more weighty carbon isotope detected in the heavy oil in Tadong 2 well. |
| Key words: molecular fossils oil-source rock correlation thermal alteration heavy oil Tarim basin |
