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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2009  >  31(6): 622-626
Zhang Xiaojun, Tao Mingxin, Ma Jinlong, Wang Wanchun, Sun Guoqiang. CHARACTERISTICS OF CARBON ISOTOPE COMPOSITION FROM SECONDARY BIOGENIC GAS IN COALBED GASES--TAKING THE HUAINAN COAL FIELD AS AN EXAMPLE[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2009, 31(6): 622-626. doi: 10.11781/sysydz200906622
Citation: Zhang Xiaojun, Tao Mingxin, Ma Jinlong, Wang Wanchun, Sun Guoqiang. CHARACTERISTICS OF CARBON ISOTOPE COMPOSITION FROM SECONDARY BIOGENIC GAS IN COALBED GASES--TAKING THE HUAINAN COAL FIELD AS AN EXAMPLE[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2009, 31(6): 622-626. doi: 10.11781/sysydz200906622
shu

CHARACTERISTICS OF CARBON ISOTOPE COMPOSITION FROM SECONDARY BIOGENIC GAS IN COALBED GASES--TAKING THE HUAINAN COAL FIELD AS AN EXAMPLE

doi: 10.11781/sysydz200906622
  • 1.

    Northwest Branch, Research Institute of Petroleum Exploration and Development, Petro China, Lanzhou, Gansu 730020, China

  • 2. Key Laboratory of Gas Geochemistry, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China

  • 3. College of Resources Sciences and Technology, Beijing Normal University, Beijing 100875, China

  • 4. School of Resources and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China

  • Received Date: 2009-01-20
  • Rev Recd Date: 2009-10-09
  • Publish Date: 2009-12-28
    Abstract
  • Coalbed gases in Huainan coal field is a gas mixture resulted from thermogenic methane and secondary biogenic gas.And the δ13C1 value of coalbed gases is very different among different mines and coal beds.This is mainly because the difference of mixing proportion between the remaining pyrolysis gas from coalbed and the secondary biogenic gas from post-stage in Huainan coal field.Compared with Chinese thermogenic coalbed gases and others from the world's major regions by δ13C1 and δ13C2 values,it is showed that the δ13C1 value from Huainan coal field is much smaller.The variational property of δ13C1 value is characterized by containing secondary biogenic gas.However,the distribution of δ13C2 value in Huainan coal field is obviously in same position with the one that from Chinese thermogenic coalbed gases and the world's major regions,and it is characterized by property of thermogenic methane.And from the δ13CCO2 value of coalbed gases,we can inferred that CO2 in methane is mainly resulted from coal pyrolysis,and part of it is the remaining CO2 from microbial reduction occurring in the secondary biogenic gas generating process.

     

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