Kansas Geological Survey, Open-file Report 2008-28
by
K. David Newell
KGS Open File Report 2008-28
January 2009
Thirteen three-inch diameter core samples from the Pennsylvanian Cherokee Group were collected from the Layne-Christensen #13-28 Beurskens well, SW SW sec. 28, T. 31 S., R. 16 E., Montgomery County, KS from April 7 to April 9, 2003. The following as-received gas contents were measured, based on the dry weight of the sample:
| 677.8' to 678.8' | Excello Shale | 21.6 scf/ton |
| 681.5' to 682.4' | Excello Shale | 16.1 scf/ton |
| 682.4' to 683.2' | Mulky coal | 154.9 scf/ton |
| 706.0' to 707.0' | Iron Post coal | 135.6 scf/ton |
| 731.5' to 732.2' | Crowburg coal | 118.5 scf/ton |
| 772.0' to 773.0' | Mineral coal | 148.6 scf/ton |
| 838.3' to 839.1' | Tebo coal | 119.0 scf/ton |
| 847.0' to 848.0' | Weir-Pittsburg coal | 135.9 scf/ton |
| 848.0' to 849.0' | Weir-Pittsburg coal | 139.5 scf/ton |
| 888.2' to 889.2' | Bluejacket coal | 72.9 scf/ton |
| 1003.7' to 1004.7' | Rowe coal | 215.3 scf/ton |
| 1053.7' to 1054.7' | Riverton coal | 120.9 scf/ton |
| 1054.7' to 1055.7' | Riverton coal | 125.3 scf/ton |
Analyses of five desorbed coal gases indicate that these are dry gases, ranging from 1035 to 1057 BTU/scf. Nitrogen is the major non-combustible component gas. Carbon dioxide contents range from 0.7% to 1.7%. Isotopic analysis indicate the gas is mixed thermogenic and biogenic in origin.
Based on gas content, density, and thickness measurements, the gas-in-place estimates for the respective units are:
| unit gas per acre (thousand cubic ft) |
|
| Excello Shale | 307.6 |
| Mulky | 254.0 |
| Iron Post | 311.6 |
| Croweburg | 131.5 |
| Mineral | 506.7 |
| Tebo | 238.5 |
| Weir-Pittsburg | 466.0 |
| Bluejacket | 131.1 |
| Rowe | 444.4 |
| Riverton | 533.9 |
The Layne-Christensen #13-28 Beurskens well; SW SW 28-T.31S.-R.16E., in Montgomery County, KS was selected for desorption tests in association with an on-going coalbed-gas research project at the Kansas Geological Survey. The samples (3-inch-diameter cores) were gathered from April 7, 2003 to April 9, 2003 by K. David Newell and Donghong Pei of the Kansas Geological Survey, with assistance by Jim Stegeman of Colt Energy. Samples were obtained by wireline coring on a rig owned by Layne-Christensen, Canada.
Bottom-hole times (i.e., the time the core sample was lifted from the bottom
of the hole) and canistering times (i.e., the time the sample was placed in
the desorption canister) were noted in order to determine lost gas and start
of desorption. Approximate wet weight of the sample was determined by subtraction
of the weight of the empty canister from the weight of the canister with the
sample in it. After the sample was removed from the canister, it was weighed
again before air-drying, then weighed after drying. The weight loss is noted
in the desorption table.
Report is in PDF format
Complete Report or In Sections - Report | Figures | Desorption Readings | Appendix
Kansas Geological Survey, Energy Research
Updated January 2009
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