ISSN 1009-6248CN 61-1149/P Bimonthly

Supervisor：China Geological Survey

Sponsored by：XI'an Center of China Geological Survey
Geological Society of China

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    LI Hong, YAO Yaming, ZHANG Junmin, et al. Research on Characteristics and Hydrocarbon-generating Mechanism of Jurassic Coal Measures Source Rock of Yanqi Basin and Analysis on Hydrocarbon-generating Capacity and Tendency(Liquid and Gas) of Different Source Rock[J]. Northwestern Geology, 2015, 48(1): 229-240.
    Citation: LI Hong, YAO Yaming, ZHANG Junmin, et al. Research on Characteristics and Hydrocarbon-generating Mechanism of Jurassic Coal Measures Source Rock of Yanqi Basin and Analysis on Hydrocarbon-generating Capacity and Tendency(Liquid and Gas) of Different Source Rock[J]. Northwestern Geology, 2015, 48(1): 229-240.
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    Research on Characteristics and Hydrocarbon-generating Mechanism of Jurassic Coal Measures Source Rock of Yanqi Basin and Analysis on Hydrocarbon-generating Capacity and Tendency(Liquid and Gas) of Different Source Rock

    • 1. Henan Geological Exploration Institute of CHEM, Zhengzhou 450011, China;

    • 2. School of Resources & Environment, North China University of Water Resources, Zhengzhou 450011, China;

    • 3. Department of Mining Engineering, Xinjiang Institute of Engineering, Urumqi 830091, China;

    • 4. School of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi, China

    More Information
    • Received Date: January 04, 2014
    • Revised Date: June 21, 2014
    • Available Online: July 28, 2022
    • Published Date: March 04, 2015
      Graphical Abstract
      • Abstract
    • Yanqi Basin, located in the east of South Tianshan orogenic belt, is a Mesozoic-Cenozoic coal-bearing basin formed on the Hercynian folded basement. As a small Jurassic petroliferous basin in western area, Yanqi basin has its own unique geological conditions besides similarity with Tarim and Turpan-Hami basin. It is a reformed basin of hydrocarbon-generating coal stratum and high geothermal gradient. Research shows that characteristics of coal measure source rocks determine hydrocarbon capacity while high geothermal gradient drive oil and gas generation. Analysis on present geothermal measurement and thermal conductivity shows that the major cause of present high geothermal gradient in Bohu depression of Yanqi basin is high terrestrial heat flow and it is believed that the origin of the high geothermal gradient is from deep underground. On the basis of types, characteristics, distribution and organic maceral including vitrinite, inertinite, exinite and sapropelinite of Jurassic coal measure source rock, evaluation of oil-gas tendency and heat-press simulation experiment, analysis on liquid and gas hydrocarbons yield of coal rock, carbonaceous mudstones and coaly mudstone of middle-lower Jurassic were carried out. The conclusion shows that liquid hydrocarbons yield are, in order, coal rock, mudstones and carbonaceous mudstones respectively and gas hydrocarbons yield are, in order, mudstones, coal rock and carbonaceous mudstones respectively.
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