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Article Navigation >  Acta Sedimentologica Sinica  > 2018  >  36(3): 630-638

HOU XiaoHuan, WU YingQin, WANG ZuoDong, LIU YanHong. Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis[J]. Acta Sedimentologica Sinica, 2018, 36(3): 630-638. doi: 10.14027/j.issn.1000-0550.2018.083
Citation: HOU XiaoHuan, WU YingQin, WANG ZuoDong, LIU YanHong. Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis[J]. Acta Sedimentologica Sinica, 2018, 36(3): 630-638. doi: 10.14027/j.issn.1000-0550.2018.083
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Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis

doi: 10.14027/j.issn.1000-0550.2018.083
  • 1.

    Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China;

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

Funds:  National Natural Science Foundation of China, No. 41772147, 41272147, 41572350; Chinese Academic of Sciences Key Project, No.XDB03020405, XDB10030404; the Key Laboratory for Oil and Gas Resources of Gansu Province Open-end Foundation, No. SZDKFJJ20170606, Y621JJ1WYQ, Y530JJ1WZD
  • Received Date: 2017-08-20
  • Rev Recd Date: 2017-11-09
  • Publish Date: 2018-06-10
  • Flash stepwise pyrolysis provide more efficient information than the simple one step pyrolysis for the same samples. This technique could be used to study on the specific thermal evolution trends of kerogen (or other samples) and its changes of structural characteristics effectively with temperature increased. In this study, thermal simulation analysis of was carried out by flash stepwise pyrolysis on the kerogen samples of the Green River shale at seven heating temperatures separatedly. There was almost no pyrolysed products at 300℃ while a little absorbed hydrocarbons appeared at 350℃. Three pyrolysis temperatures were enriched in pyrolysates at 400℃, 450℃and 500℃, respectively, and the pyrolysis products reached a peak at 450℃. The products were mainly in pairs of n-alkanes and n-alkenes, accompanied by the gradual reduction of isoprenoids and long carbon hydrocarbons, prist-1-ene was the dominated single component at both 400℃and 450℃.; There were only a very small quantity of hydrocarbons liberated at 550℃. After 600℃, pyrolysates almost disappeared, indicating the thermal cracking mainly occurred at lower temperatures. These results may demonstrate that the pyrolysates by flash stepwise pyrolysis at temperatures from 300℃ to 600℃ with an interval of 50℃ could provide enough information for the study of thermal evolution and hydrocarbon generation mechanism of kerogen.
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  • Received:  2017-08-20
  • Revised:  2017-11-09
  • Published:  2018-06-10

Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis

doi: 10.14027/j.issn.1000-0550.2018.083
  • 1. Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China;
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
Funds:  National Natural Science Foundation of China, No. 41772147, 41272147, 41572350; Chinese Academic of Sciences Key Project, No.XDB03020405, XDB10030404; the Key Laboratory for Oil and Gas Resources of Gansu Province Open-end Foundation, No. SZDKFJJ20170606, Y621JJ1WYQ, Y530JJ1WZD
  • Received Date: 2017-08-20
  • Rev Recd Date: 2017-11-09
  • Publish Date: 2018-06-10

Abstract: Flash stepwise pyrolysis provide more efficient information than the simple one step pyrolysis for the same samples. This technique could be used to study on the specific thermal evolution trends of kerogen (or other samples) and its changes of structural characteristics effectively with temperature increased. In this study, thermal simulation analysis of was carried out by flash stepwise pyrolysis on the kerogen samples of the Green River shale at seven heating temperatures separatedly. There was almost no pyrolysed products at 300℃ while a little absorbed hydrocarbons appeared at 350℃. Three pyrolysis temperatures were enriched in pyrolysates at 400℃, 450℃and 500℃, respectively, and the pyrolysis products reached a peak at 450℃. The products were mainly in pairs of n-alkanes and n-alkenes, accompanied by the gradual reduction of isoprenoids and long carbon hydrocarbons, prist-1-ene was the dominated single component at both 400℃and 450℃.; There were only a very small quantity of hydrocarbons liberated at 550℃. After 600℃, pyrolysates almost disappeared, indicating the thermal cracking mainly occurred at lower temperatures. These results may demonstrate that the pyrolysates by flash stepwise pyrolysis at temperatures from 300℃ to 600℃ with an interval of 50℃ could provide enough information for the study of thermal evolution and hydrocarbon generation mechanism of kerogen.

HOU XiaoHuan, WU YingQin, WANG ZuoDong, LIU YanHong. Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis[J]. Acta Sedimentologica Sinica, 2018, 36(3): 630-638. doi: 10.14027/j.issn.1000-0550.2018.083
Citation: HOU XiaoHuan, WU YingQin, WANG ZuoDong, LIU YanHong. Study on Characterization and Mechanism of Thermal Evolution of Green River Shale Kerogen by Flash Stepwise Pyrolysis[J]. Acta Sedimentologica Sinica, 2018, 36(3): 630-638. doi: 10.14027/j.issn.1000-0550.2018.083
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