Item Number: OFS99-17

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Authors:	Maria Mastalerz Erik Kvale

ANNOTATION: This report summarizes a coalbed methane study conducted in Gibson County, Indiana. Coal samples of the Springfield Coal Member were collected from four boreholes within an 8-square-mile area located south and east of the town of Francisco in order to determine the amount of gas present in the coal as well as factors controlling the coalbed gas potential. Our study indicates that the gas content of the Springfield coal within the study is primarily a function of the depth of the seam. Average total gas contents of the seam on dry mineral-matter-free basis range from 52.7 scf/ton to 100.6 scf/ton.

Mastalerz, M. , Kvale, E. 1999, Coalbed gas potential in Gibson County, Indiana: Indiana Geological Survey Open-File Study 99-17, 39 p., 7 fig.

Notes: Publications in the Indiana Geological Survey Open-File series have been inconsistently named using a variety of series titles including "Open-File Report," "Open-File Map," and "Open-File Study." Prior to 1994, a publication in this series was generally referred to as an "Open-File Report" (but not always). To help reduce confusion created by these inconsistencies, the IGS now refers to every publication in the Open-File series as an "Open-File Study." To be entirely correct in writing a bibliographic reference for a publication, one should use the series name and number that appears on the publication itself.

Mining history of the Francisco, Somerville, and Liberty underground coal mines in eastern Gibson County, Indiana (Springfield Coal Member, Pennsylvanian)

A GIS-based evaluation of coalbed gas potential of the Seelyville Coal in Indiana. Final report to the United States Geological Survey

Map of southwestern Gibson County, Indiana showing structure on Springfield Coal Member (V) of the Petersburg Formation (Pennsylvanian)

Map of northern Posey County, Indiana, showing structure on Springfield Coal Member (V) of the Petersburg Formation (Pennsylvanian)

Map of southern Posey County, Indiana, showing structure on Springfield Coal Member (V) of the Petersburg Formation (Pennsylvanian)

Map showing the thickness and mined out areas of the Springfield Coal Member in Gibson, Pike, Posey, Warrick, and Vanderburgh Counties, Indiana

Map showing the depth to the top of the Springfield Coal Member in Gibson, Pike, Posey, Warrick, and Vanderburgh Counties

Map showing the elevation relative to sea level of the top of the Springfield Coal Member in Gibson, Pike, Posey, Warrick, and Vanderburgh Counties, Indiana

Map showing the thickness and mined out areas of the Springfield Coal Member in Vermillion and Vigo Counties, Indiana

Map showing the elevation relative to sea level of the Springfield Coal Member in Sullivan, Knox, and portions of Clay, Greene, and Daviess Counties, Indiana

Keywords: coal, energy resources, Springfield Coal Member, Petersburg Formation, Carbondale Group, Pennsylvanian, coalbed methane, gas, cbm, methane