Coalbed methane resources and reservoir characteristics of NO. II1 coal seam in the Jiaozuo coalfield, China

Zhang, X. D., Liu, Y. H., Wang, G. X. and Liu, H. (2009) Coalbed methane resources and reservoir characteristics of NO. II1 coal seam in the Jiaozuo coalfield, China. Energy Exploration and Exploitation, 27 5: 307-332. doi:10.1260/0144-5987.27.5.307

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Author Zhang, X. D.
Liu, Y. H.
Wang, G. X.
Liu, H.
Title Coalbed methane resources and reservoir characteristics of NO. II1 coal seam in the Jiaozuo coalfield, China
Journal name Energy Exploration and Exploitation   Check publisher's open access policy
ISSN 0144-5987
Publication date 2009-01-01
Year available 2009
Sub-type Article (original research)
DOI 10.1260/0144-5987.27.5.307
Open Access Status File (Publisher version)
Volume 27
Issue 5
Start page 307
End page 332
Total pages 26
Editor Sun, Y. Z.
Place of publication UK
Publisher Multi-Science Publishing Co. Ltd
Language eng
Subject C1
0914 Resources Engineering and Extractive Metallurgy
970104 Expanding Knowledge in the Earth Sciences
850199 Energy Exploration not elsewhere classified
Abstract Jiaozuo coalfield is located in the northwest of Henan province, China, and Close to the Southern Qinshui coal basin. (lie most successfully commercial CBM resource developed area in China. The No. II1 coal seam is the main economic coal seam in Jiaozuo coalfield and its average thickness exceeds 5.36m. The maximum reflectance of vitrinite (R-0.max) No. II1 coal across the Jiaozuo is between 3.16% and 4.78%. The coalbody structure of the No. II1 coal seam changes greatly in different part and can be generally divided into 1 similar to 3 sub-layers. The micropores ill the No.II1 coal seam is the major pores, secondly are transitional pores, and then less macropores and mesopores. The No. II1 coal seam has stronger adsorption, and the reservoir natural permeability has all evident heterogeneity vary from 0.0001 to 83.71mD. High permeability region is often near fault structure or the boundary of fault block. The CBM genetic type is homologous thermal cracking gas of humic coal with high matunity. Gas content with the burial depth of 163 similar to 1070m varies very greatly from 4.65 to 45.75m(3)/t, with all average value of 18.3m(3)/t, and gradually increases from northeast to southwest. According to the latest evaluation for CBM resource in Jiaozuo coalfield, the existing total in-place CBM resources in the No. In coal seam with the depth of shallower than 2000 m are close to 1.2 x 10(12)m(3), most of them mainly distribute in the depth of 1000 similar to 1500 m. The existing total in-place CBM resources is dominated by the inferred CBM resource reserves (more than 70%), which distribute the undrilled places with few coal geological knowledge and deeper than 1000m. The resource concentration of the No. II1 coal,earn in Jiaozuo coalfield is in the range of (0.513-3.478)x10(8) m(3)/km(2), with an average value of 1.805x10(8) m(3)/km(2). Based on the CBM resource investigation and reservoir evaluation, the most prospective target zones for CBM production in Jiaozuo coalfield include Guhanshan coal mine, Jiulishan coal mine and the west part of Qiangnan coal district.
Keyword Coalbed methane
Jiaozuo coalfield
reservoir characteristics
CBM resource assessment
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Sun, 28 Feb 2010, 10:05:21 EST