Xinjiang Petroleum Geology

Xinjiang Petroleum Geology ›› 2005, Vol. 26 ›› Issue (2): 148-151.

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Organic Geochemistry of TD-2 Well in Tarim Basin

MA An-lai1,2, ZHANG Shui-chang3, ZHANG Da-jiang3, LIANG Di-gang3, WANG Fei-yu4   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    2. Yangtze River University, Jingzhou,Huhei 434023, China;
    3. Research Institute of Petroleum Exploration and Development,PetroChina, Beijing 100083,China;
    4. University of Petroleum, Beijing 102200, China
  • Received:2004-07-08 Online:2005-04-01 Published:2020-08-24

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Abstract: A little heavy oil was acquired from Well TD 2 in Cambrian reservoir in the eastern central uplift of Tarim basin. The oil 1s characterized by high Pr/Ph, high gammacerane, high 24 norcholestane, high C28 sterane, high dinosterane and triaromatic dinosterane, high 4 methyl 24-ethyl cholestane and 4-methyl-24-ethyl triaromatic cholestane. The geologic analysis and oil-source correlation showed the heavy oil originated from the Cambrian source rock. The 25-norhopane series of the oil indicated that the oil had been hiodegraded. A large amount of the phenanthrene, flnoranthene, henzoanthracene, henzofluoranthene, pyrene and the homogenization temperature of the fluid inclusion suggested the oil has suffered thermal lteration. Combined with the burial history of Well TD-2, the homogenized temper- ature of the fluid inclusion indicated the oil formed dming (450~44)×106a．

Key words: Tarim basin, biomarker, oil-source correlation, heavy oil, biodegradation, Cambrian

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