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Variability of geochemical properties in a microbially dominated coalbed gas system from the eastern margin of the Illinois Basin, USA

International Journal of Coal Geology

By:
, , , , and
DOI: 10.1016/j.coal.2008.02.002

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Abstract

This study outlines gas characteristics along the southeastern margins of the Illinois Basin and evaluates regional versus local gas variations in Seelyville and Springfield coal beds. Our findings suggest that high permeability and shallow (100-250??m) depths of these Indiana coals allowed inoculation with methanogenic microbial consortia, thus leading to widespread microbial methane generation along the eastern marginal part of the Illinois Basin. Low maturity coals in the Illinois Basin with a vitrinite reflectance Ro ~ 0.6% contain significant amounts of coal gas (~ 3??m3/t, 96??scf/t) with ??? 97??vol.% microbial methane. The amount of coal gas can vary significantly within a coal seam both in a vertical seam section as well as laterally from location to location. Therefore sampling of an entire core section is required for accurate estimates of coal gas reserves. ?? 2008 Elsevier B.V. All rights reserved.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Variability of geochemical properties in a microbially dominated coalbed gas system from the eastern margin of the Illinois Basin, USA
Series title:
International Journal of Coal Geology
DOI:
10.1016/j.coal.2008.02.002
Volume
76
Issue:
1-2
Year Published:
2008
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
International Journal of Coal Geology
First page:
98
Last page:
110