Xinjiang Petroleum Geology ›› 2005, Vol. 26 ›› Issue (4): 453-458.

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Re-Discussion of Coal-Formed Oil Mechanism in Turpan-Hami Basin

SU Chuan-guo, ZHU Jian-guo, M ENG Wang-cai, JIANG Bing, W ANG Tian-peng, WANG Wen-xia   

  1. Research Institute of Exploration and Development, Tuha Oilfield Company, PetroChina, Hami, Xinjiang 839009, China
  • Received:2005-02-22 Online:2005-08-01 Published:2020-11-23

Abstract: Tupan-Hami (Tuha) basin is deemed to be a typical coal-formed oil basin. This paper presents the analysis of the hydrogen-enriched coal maceral, simulated hydrocarbon generating characteristic, special hydrocarbon accumulation pattern, and the correlation of predicted and proved resources in different areas. The results indicate that the Jurassic coal measure in Tuha basin does not possess large-scale hydrocarbon generating and expulsing capability for forming a commercial oilfield. According to the evidences in geology and geochemistry, it is considered that the crude oil from the Middle Jurassic in Taibei sag is strictly not "coal-formed oil", but "source-mixed oil" formed by deep lacustrine facies and coal measure source rocks.

Key words: Tuha basin, Jurassic, coal-formed oil, mechanism

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