Xinjiang Petroleum Geology

Xinjiang Petroleum Geology ›› 2004, Vol. 25 ›› Issue (6): 634-635.

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Distribution and Significance of Diterpenoid Alkanes in Crude Oils from Eastern Junggar Basin

LIAO Jian-de1, YANG Bin2, CHENG Xian-sheng1, XIANG Bao-li1, KANG Su-fang1, LIU Cui-min1   

  1. 1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    2. Hangzhou Institute of Petroleum Geology, Hangzhou, Zhejiang 310012, China
  • Received:2004-03-12 Revised:2004-06-30 Published:2021-01-14

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Abstract: The analysis of crude samples from Santai-Beisantai and Jimusaer areas in Junggar basin shows that the bicyclic sesquiterpenoids are rich in the diterpenoid alkanes. From the bicyclic sesquiterpenoids' characteristics, the crude oils from these areas could be classified into three types: Type-A is of high contents of drimanes in terms of the ratio of rearranged drimane/8(H)-drimane of 0.6; Type-B ranges from 0.8 to 1.1; Type-C is bigger than 1.1in this ratio. It is indicated that the three types of crude oils belong to different types of origins based on the dis-tribution of dicyclic sesquiterpenoids.

Key words: Junggar basin, crude oil, dicyclic sesquiterpenoids, hopane, distribution

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