Volume 45 Issue 1
Feb.  2017
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HUANG Ping, MENG Zhaoping, CHEN Huicheng, WANG Junyao. Distribution characteristic of gas content of coal reservoir and its methane carbon isotope in the Xishan block[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(1): 75-79. DOI: 10.3969/j.issn.1001-1986.2017.01.015
Citation: HUANG Ping, MENG Zhaoping, CHEN Huicheng, WANG Junyao. Distribution characteristic of gas content of coal reservoir and its methane carbon isotope in the Xishan block[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(1): 75-79. DOI: 10.3969/j.issn.1001-1986.2017.01.015
shu

Distribution characteristic of gas content of coal reservoir and its methane carbon isotope in the Xishan block

  • 1. College of Geosciences and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;

  • 2. State Key Laboratory of Coal and CBM Co-mining, Shanxi Jincheng Anthracite Mining Group, Jincheng 048000, China

Funds: 

National Natural Science Foundation of China(41372163)

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  • Received Date: April 04, 2016
  • Published Date: February 24, 2017
    Graphical Abstract
    • Abstract
  • The gas-bearing properties is an important parameter to determine the exploration and development of coalbed methane(CBM). The methane carbon isotope(δ13C1) can reflect the reservoir condition of CBM effectively. Based on the date of measured gas content from CBM well, the characteristic of gas content distribution in coalbed was analyzed, and the correlations and models of gas content, the burial depth of coalbed, geological structure were built. The characteristic of δ13C1 distribution was discussed and it had an indicative function to the distribution of gas-bearing properties. Findings show that, the gas content in the Xishan block is an average of 6.87 m3/t, 8.4 m3/t, 9.6 m3/t in the No.2, 8 and 9 coalbed respectively. The gas content was mainly influenced by burial depth of coalbed and structural configuration. The δ13C1 value of the No.8 in the study area ranges from -65.33‰ to -40.94‰ and its average is -45.88‰, and there was a positive correlation between coalbed gas content and δ13C1. δ13C1 generally is getting heavy with increase of gas content. δ13C1 is mainly controlled by the coalbed methane desorption-diffusion-transport effect and hydrodynamic condition.
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    • References (21)
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