塔里木盆地塔东2井寒武系稠油地球化学特征与成藏
- 长江大学油气资源与勘探技术教育部重点实验室 地球化学系湖北荆州434023
- 收稿日期:
1900-01-01
- 修回日期:
1900-01-01
- 刊出日期:
2009-12-10
摘要: 剖析塔东2井稠油的地球化学特征与形成过程，对深化塔里木盆地海相原油的成藏特征具有重要的意义。综合运用碳同位素、色谱、色谱—质谱等技术手段研究了塔东2井寒武系稠油的特征，研究结果揭示塔东2井寒武系稠油具高伽马蜡烷、高C28甾烷、低重排甾烷和高C27三芳甾烷的特征，与寒武系—下奥陶统烃源岩的分子特征类似，说明塔东2井寒武系原油源自寒武系—下奥陶统烃源岩；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），及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；流体包裹体均一化温度和埋藏—热演化史分析确定了塔东2井原油的成藏期为450~440 Ma。
Geochemical Characteristics and Reservoir Formation of Cambrian Heavy Oil of Well Tadong 2 in Tarim Basin
- Key Laboratory of Exploration Technologies for Oil and Gas Resources, Department of Geochemistry, Yangtze University, Jingzhou Hubei 434023;
- Received Date:
1900-01-01
- Rev Recd Date:
1900-01-01
- Publish Date:
2009-12-10
Abstract: Studying the geochemical characteristics and formation history of heavy oil from Well Tadong 2 is of great importance to clarify the oil accumulation of Tarim marine crude oil. The writer synthetically apply the isotope mass spectrogram, chromatogram and chromatogrammass spectrogram methods to the research of molecular fossil characteristic of heavy oil from Well Tadong 2 , and results reveal that heavy oil from Well Tadong 2 is characterized by high gammacerane , high C28 sterane ,low rearranged sterane and high C27triaromatic steroid, these characteristics are similar to that of CambrianLower Ordovician source rock , which demonstrate that Cambrian crude oil come from CambrianLower Ordovician source rock; condensed compounds (fluoranthene, pyrene, benzo\[a\]anthracene, bow, benzo fluoranthene, benzopyrene) with high abundance are detected in the heavy oil of Well Tadong 2, and carbon isotope value of whole oil evidently lean to heavier, all foregoing characteristics revealing that hydrocarbons in crude oil become densification by thermal alteration. Homogenization temperature of fluid inclusion and burialthermal evolution history imply that accumulation period of heavy oil from Well Tadong 2 may be at 450~440 Ma.
唐友军. 塔里木盆地塔东2井寒武系稠油地球化学特征与成藏[J]. 沉积学报, 2009, 27(6): 1208-1215.
| 引用本文: |
唐友军. 塔里木盆地塔东2井寒武系稠油地球化学特征与成藏[J]. 沉积学报, 2009, 27(6): 1208-1215.
|
TANG Youjun. Geochemical Characteristics and Reservoir Formation of Cambrian Heavy Oil of Well Tadong 2 in Tarim Basin[J]. Acta Sedimentologica Sinica, 2009, 27(6): 1208-1215.
| Citation: |
TANG Youjun. Geochemical Characteristics and Reservoir Formation of Cambrian Heavy Oil of Well Tadong 2 in Tarim Basin[J]. Acta Sedimentologica Sinica, 2009, 27(6): 1208-1215.
|
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