Xinjiang Petroleum Geology

Xinjiang Petroleum Geology ›› 2006, Vol. 27 ›› Issue (1): 32-34.

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Biomarker Char acter istic of Crude Oil and Sour ce Cor r elation in Ying' er Sag, J iudong Basin

MA Li-yuan1,2, CHENG Ke-ming3, XIONG Ying3, YANG Zhi-ming4   

  1. 1. Lanzhou Institute of Geology, CAS, Lanzhou, Gansu 730000, China;
    2. Graduate School, CAS, Beijing 100039, China;
    3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    4. Research Institute of Exploration and Development, Yumen Oilfield Company, PetroChina, Yumen, Gansu 735200, China
  • Received:2005-05-31 Revised:2005-05-31 Published:2020-10-19

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Abstract: Through analyses of the biomarker characteristic and its effect on sedimentary setting, water salinity, maturity and parent material, the crude oil from Ying'er sag in Jiudong basin can be classified into the crude from Zhonggou formation in Yingcan-1 Well and the crude from Jiucan-1 Well, Chang-101 Well and Chang-2 Well. These two types of crude oils are distinct in maturity and biomarker characteristic. The source correlation result shows that the former crude mainly originates in the source rock of Zhonggou formation, being a product of immature to low-mature phases, hence regarded as immature-low mature crude; the latter primarily originates in those of Chijinbu formation and Lower Xiagou formation in mid-south part of Ying'er sag, and high maturity, partial acid sediments and bacterium depositional organic matters with clay minerals are its major sources.

Key words: Jiudong basin, biomarker, source correlation, sedimentary environment

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