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Volume 11 Issue 1
Mar 2000
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Yong Qin, Yousheng Zhang, Yanming Zhu, Bingheng Fan, Bo Jiang, Tianzhong Li. Lagging and Its Kinetic Mechanism of Hydrocarbon Re-generation from Organic Matters in Coals. Journal of Earth Science, 2000, 11(1): 84-88.
Citation: Yong Qin, Yousheng Zhang, Yanming Zhu, Bingheng Fan, Bo Jiang, Tianzhong Li. Lagging and Its Kinetic Mechanism of Hydrocarbon Re-generation from Organic Matters in Coals. Journal of Earth Science, 2000, 11(1): 84-88.

Lagging and Its Kinetic Mechanism of Hydrocarbon Re-generation from Organic Matters in Coals

Funds:

National Natural Science Foundation of China 49772131

  • Received Date: 07 Feb 2000
  • Accepted Date: 25 Feb 2000
  • Based on the composite analysis of the coal sample series with natural and artificial maturation, the lagging and its kinetic mechanism of the hydrocarbon re-generation from the organic matters in coals were studied using the Rock-Eval gas chromatogram (Py-GC) method. The results show that the maturation at the hydrocarbon re-generation peak shifts regularly forward with increasing the starting maturation and the deadline of the hydrocarbon re-generation lies about at 4.0% Ro. The difference value between the peak and starting maturation of the hydrocarbon re-generation develops in a parabola-like pattern with increasing the starting maturation, and the resolute and relative laggings evolve in stage, from which the lagging depth could be predicted. The peak half-width of the hydrocarbon re-generation curve develops as the starting maturation increases, which might indicate that the hydrocarbon-derived rocks with the starting maturation lied about at oil-generated peak might be relatively high in the hydrocarbon-regenerated amount. In the meantime, the mean reactivated energy of the coal samples with starting maturation develops in four stages that are highly consistent with those of the hydrocarbon-regenerated amount and lagging, which indicated that the hydrocarbon re-generation is strictly controlled by the geochemical mechanism of the reactive kinetics.

     

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