Xinjiang Petroleum Geology

Xinjiang Petroleum Geology ›› 2005, Vol. 26 ›› Issue (5): 493-498.

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Geochemical Characteristics of Crude Oil in Santai Area, Junggar Basin

YANG Bin1, LIAO Jian-de2, HAN Jun3, QIN Jun4, REN Jiang-ling2, KANG Su-fang2   

  1. 1. Hangzhou Instiute of Petroleum Geology, Hangzhou, Zhejiang 310023, China;
    2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    3. Jundong Exploration Department, Xinjiang Oilfield Company, PetroChina, Fnkang, Xinjiang 831500, China;
    4. Research Institute of Zhejiang Exploration Company, PetroChina, Hangzhou, Zhejiang 310012, China
  • Received:2005-05-23 Online:2005-10-01 Published:2020-11-23

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Abstract: Santai crude oil can be classified into three types based on light hydrocarbon stellar diagram, m(Pr)/m(Ph) of saturated hydro-carbon, content characteristics of β-cartane, composition of three types of regular steranes, content characteristics of pregnane and maturity index, composition characteristics of triterpene-tetracyclic terpane and gammacerane of crude oil in Santai area of Junggar basin, and based on rearanged drimanes/8B(H)-drimanes ratio, 4,4,8,8,9-PMDHN/4,4,8,9,9-PMDHN ratio of bicyclic sesquiterpenes and compoaition of C30-hopane, phenanthrene and metylic-phenanthrene in crude oil. The first-type crude oil, the major crude oil in Santai area, is original-ed from source rocks of Pingdiquan-Lucagou formnation of Middle Permian. The second -type crude oil is from source mocks of Jurassic. The third-type crude oil is from those of Carboniferous Batamayineishan formnation. The Permian crude oil comes from Jimusaer seg, Tianshan mountain front seg and Fukang seg. The Jurassic crude oil comes from Jurassic source rocks in Fukang seg, while Carboniferous crude oil is just from this studied area.

Key words: Junggar basin, Santai area, crude oil, geochemistry, classification

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