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COALBED METHANECOALBED METHANEININ
KENTUCKYKENTUCKY
Brandon C. NuttallBrandon C. Nuttall
AcknowledgmentsAcknowledgments
nn Don Chesnut, KGSDon Chesnut, KGSnn Cortland Eble, KGSCortland Eble, KGSnn Steve Greb, KGSSteve Greb, KGSnn Jim Hower, CAERJim Hower, CAERnn John Hiett, CAERJohn Hiett, CAER
Why Not Kentucky?Why Not Kentucky?
nn Coal rank too lowCoal rank too lownn Gas content too lowGas content too lownn Permeability too lowPermeability too lownn Too far from operational areaToo far from operational areann Ownership in questionOwnership in questionnn No production dataNo production data
OutlineOutline
nn Geologic frameworkGeologic frameworknn Coal mining in KentuckyCoal mining in Kentuckynn Coal quality, rank, and cleatCoal quality, rank, and cleatnn Gas contentGas contentnn Coalbed-methane productionCoalbed-methane production
Coalbed Methane in KentuckyCoalbed Methane in Kentucky
nn Geologic frameworkGeologic frameworknn Coal mining in KentuckyCoal mining in Kentuckynn Coal quality, rank, and cleatCoal quality, rank, and cleatnn Gas contentGas contentnn Coalbed-methane productionCoalbed-methane production
Kentucky Coal BasinsKentucky Coal Basins
Coalbed Methane in KentuckyCoalbed Methane in Kentucky
nn Geologic frameworkGeologic framework
nn Coal mining in KentuckyCoal mining in Kentuckynn Coal quality, rank, and cleatCoal quality, rank, and cleatnn Gas contentGas contentnn Coalbed-methane productionCoalbed-methane production
Explosions and IgnitionsExplosions and Ignitions
PennsylvanianPennsylvanian
4545 3939
Coalbed Methane in KentuckyCoalbed Methane in Kentucky
nn Geologic frameworkGeologic frameworknn Coal mining in KentuckyCoal mining in Kentucky
nn Coal quality, rank, andCoal quality, rank, andcleatcleat
nn Gas contentGas contentnn Coalbed-methane productionCoalbed-methane production
Areas with RAreas with R00 > 0.6 > 0.6
Medium- to High-VolatileMedium- to High-VolatileBituminousBituminous
Cleat Strike DataCleat Strike Data
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69 Illinois Basin69 Illinois Basin1,023 Appalachian Basin1,023 Appalachian Basin
Summary of Cleat DataSummary of Cleat Data
0%
5%
10%
15%
Appalachian BasinIllinois Basin
WW
NN
SS
EE
1,094 total1,094 totalmeasurementsmeasurements
Coalbed Methane in KentuckyCoalbed Methane in Kentucky
nn Geologic frameworkGeologic frameworknn Coal mining in KentuckyCoal mining in Kentuckynn Coal quality, rank, and cleatCoal quality, rank, and cleat
nn Gas contentGas contentnn Coalbed-methane productionCoalbed-methane production
CBM Resource (BCF)CBM Resource (BCF)
130.2130.2
153.4153.4
Estimated from USGS 1995 National AssessmentEstimated from USGS 1995 National Assessment
Desorption DataDesorption Data
USBMUSBM
KGSKGS
Observed Desorption DataObserved Desorption Data
0%5%
10%15%20%25%30%35%40%
Freq
uenc
y
0 0.5 1 1.5 2 2.5 3 3.5
m3/ton
Kim FormulaKim Formula
nn Ash content (%)Ash content (%)nn Fixed carbon (%)Fixed carbon (%)nn Volatile matter (%)Volatile matter (%)nn Moisture content (%)Moisture content (%)nn Sample depth (meters)Sample depth (meters)
Limitations of Kim FormulaLimitations of Kim Formula
nn Empirical, derived from regressionEmpirical, derived from regressionll Few Kentucky coals were usedFew Kentucky coals were used
nn Depth and rank dependentDepth and rank dependentll Implies systematic increaseImplies systematic increase
nn Assumes no relation to compositionAssumes no relation to compositionll Maceral components not consideredMaceral components not considered
Coal-Quality DatabaseCoal-Quality Database
nn 3,204 records3,204 recordsnn Underground and core samplesUnderground and core samplesnn Selected data withSelected data with
ll Proximate analysisProximate analysisll ThicknessThicknessll Coal elevationCoal elevation
nn 704 coal records used704 coal records used
Data LimitationsData Limitations
nn Moisture content usuallyMoisture content usuallymissingmissingll Average of available values usedAverage of available values used
nn Depth of coal sometimes missingDepth of coal sometimes missingll Surface elevation assumed to calculateSurface elevation assumed to calculate
depthdepth
Coalbed Methane Data SetCoalbed Methane Data Set
NoneNone1 to 331 to 3334 to 6634 to 6667 to 10067 to 100
0%2%4%6%8%
10%12%14%16%18%20%
Freq
uenc
y
0 2.8 5.6 8.5 11.3 14.1 17
m3/ton
WesternEastern
Gas Content of Kentucky CoalsGas Content of Kentucky Coals
GoodGood BestBest
Calculated using Kim methodCalculated using Kim method
Coalbed Methane in KentuckyCoalbed Methane in Kentucky
nn Geologic frameworkGeologic frameworknn Coal mining in KentuckyCoal mining in Kentuckynn Coal quality, rank, and cleatCoal quality, rank, and cleatnn Gas contentGas content
nn Coalbed-methaneCoalbed-methaneproductionproduction
CBM Production: 1928CBM Production: 1928
PennsylvanianPennsylvanian
Sebree Cons (?)Sebree Cons (?)
CBM Production: 1957CBM Production: 1957
PennsylvanianPennsylvanian
Nolan HeirsNolan Heirs75 Mcf/d75 Mcf/d
CBM Production: 1990CBM Production: 1990
PennsylvanianPennsylvanian
EREX #KF1300EREX #KF13005 Mcf/d5 Mcf/d
CBM Production: 1998CBM Production: 1998
PennsylvanianPennsylvanian
MILLER #26 SMEPAMILLER #26 SMEPA102 Mcf/d102 Mcf/d
BeverlyBeverly7.5-minute7.5-minutequadranglequadrangle
CBM Well LocationsCBM Well Locations
ClayClay
BellBell
HarlanHarlan
LeslieLeslie
KnoxKnox
SMEPA VicinitySMEPA Vicinity
Lick Fork
Lick Fork
BellBellKnoxKnox
ClayClay
11-F-7111-F-71 14-F-7214-F-7215-F-7215-F-72
20-F-7120-F-71 16-F-7216-F-72 17-F-7217-F-72
Miller PetroleumMiller Petroleum
2626
31312828
3030
2929
CBM36CBM36
CBM33CBM33
CBM32CBM32
CBM34CBM34
CBM35CBM35
AKS #13 SMEPAAKS #13 SMEPA
11001100
11501150
12001200
GRGR DensityDensity0 200 2 3
CoalCoal
CoalCoal
TargetsTargets
nn Seams with three or more records inSeams with three or more records indatabasedatabase
nn Estimated gas content of 7 mEstimated gas content of 7 m33/ton/tonor greateror greater
Greatest CBM PotentialGreatest CBM Potential
At least 6 mAt least 6 m33/ton/ton
≥ ≥ 7 m7 m33/ton/ton
Higher rank coalsHigher rank coals
ConclusionConclusion
Coalbed methane in both theCoalbed methane in both theIllinois and Appalachian BasinsIllinois and Appalachian Basins
is an emerging, potentiallyis an emerging, potentiallyeconomic resource.economic resource.
Kentucky Geological SurveyKentucky Geological Survey
On the Web:On the Web:
www.uky.edu/KGSwww.uky.edu/KGS
