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Kansas Geological Survey, Open-file Report 2008-26

Analysis of Cherokee Group Cuttings Samples for Gas Content
Dart Cherokee Basin Operating Company, #A3-36 Fields,
NW NE sec. 36, T. 34 S., R. 14 E., Montgomery County, Kansas

K. David Newell

KGS Open File Report 2008-26
January 2009

Seven cuttings samples from the Pennsylvanian Cherokee Group were collected from the Dart Cherokee Basin #A3-36 Fields, NW NE sec. 36, T. 34 S., R. 14 E., Montgomery County, KS. The samples calculate as having the following gas contents:

1040' to 1051' Excello Shale
11 scf/ton
1072' to 1074' Iron Post coal
74 scf/ton
1108' to 1110' Croweburg
127 scf/ton
1158' to 1161' Mineral
122 scf/ton
1237' to 1239' Weir-Pittsburg
138 scf/ton
1475' to 1478' Rowe coal
245 scf/ton
1498' to 1502' Riverton coal
170 scf/ton

The Dart Cherokee Basin #A3-36 Fields, 36-T.34S.-R.14E., Montgomery County, KS, was selected for cuttings desorption tests in association with an on-going coalbed gas research project at the Kansas Geological Survey. The samples were gathered March 10, 2005 by personnel from Dart Cherokee Basin L.L.C., and turned over to LeaAnn Davidson of the Kansas Geological Survey on March 14, 2005. Samples were obtained during normal drilling of the well, with no cessation of drilling before zones of interest (i.e., coals and dark shales in the Cherokee Group) were penetrated. The well was drilled using an air rotary rig owned by McPherson Drilling.

The samples were canistered, with surface time and canistering times noted. These samples were collected in canisters that were supplied by Dart Cherokee Basin L.L.C. and the Kansas Geological Survey. Lag times for samples to reach the surface (important for assessing lost gas) were determined by using the lag times from a nearby air-drilled well (Dart Cherokee Basin #CH-1 Holder; sec. 1-T.30S.-R.14E., Wilson County, KS), which was also drilled using this particular drilling rig. The lag times were determined by periodically noting the time it took for cuttings to reach the surface following resumption of drilling after new pipe was added to the drill string.

Excello Shale
1684 grams dry wt.
Iron Post coal
391 grams dry wt.
Croweburg coal
322 grams dry wt.
Mineral coal
935 grams dry wt.
Weir-Pittsburg coal
315 grams dry wt.
Rowe coal
2240 grams dry wt.
Riverton coal
1190 grams dry wt.

Report is in PDF format

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Kansas Geological Survey, Energy Research
Updated January 2009
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