U.S. Shale Gas Resources, Reserves and $$$ John B. Curtis Potential Gas Agency Colorado School of...
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U.S. Shale GasU.S. Shale Gas
Resources, Resources, Reserves and $$$Reserves and $$$
John B. CurtisJohn B. CurtisPotential Gas AgencyPotential Gas AgencyColorado School of MinesColorado School of Mines
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Location of U.S Shale Gas PlaysLocation of U.S Shale Gas Plays
U.S. Energy Information Agency, March 2010U.S. Energy Information Agency, March 2010
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Oil Shale Gas Hydrates
TightGas Sands;
CBM;Gas Shales
TightOil;
Heavy Oil;Bituminous
Sands
Oil Gas
Conventional Reservoirs:Small Volumes,Easy to Develop
Unconventional Reservoirs:Large Volumes,Hard to Develop
Huge Volumes,Difficult
to Develop
Incr
easi
ng P
rodu
ct P
rice
Imp
rovi
ng
Tec
hn
olo
gy
Province Resource Size
The Resource PyramidThe Resource Pyramid
(S. Sonnenberg, CSM)
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Shale Gas Annual Production and Energy Shale Gas Annual Production and Energy Information Administration (EIA) ForecastInformation Administration (EIA) Forecast
0
500
1,000
1,500
2,000
2,500
19791981198319851987198919911993199519971999200120032005200720092011201320152017201920212023202520272029
Annual Production, Bcf
CUM
EIA Projection
EnCanaEnCana
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Targeted Research – $150 Targeted Research – $150 MillionMillion
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Acquisitions – >$50 BillionAcquisitions – >$50 Billion
Source: Trollart.com – Ray TrollSource: Trollart.com – Ray Troll
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Resource Development – Resource Development – >$15 Billion>$15 Billion
Source:devonenergy.com
Source:devonenergy.com
Source:AAPG
Source:AAPG
Source:chiefoiland gas.com
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Hydrocarbons From Shale – Never Hydrocarbons From Shale – Never Say DieSay Die
Growth in Barnett Shale - Ft. Worth Basin
0
100
200
300
400
500
600
1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004
Annual Production, Bcf
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
Producing Wells
Gas Production Well Count
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Shale Gas Reservoir Mechanisms
U.S. DOE
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Exploration ConsiderationsExploration Considerations
• Natural fractures - Friend or Foe?• Facies changes - greater permeability• Kerogen type - I,II,IIS,III• Microbial or thermogenic gas?• Thermal maturation history• MWD - especially w/ gas isotopes
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Some Elements of a Successful Some Elements of a Successful Shale Gas PlayShale Gas Play
ProductivityProductivity
Gas-In-PlaceGas-In-PlaceThicknessThickness
Organic RichnessOrganic Richness
MaturationMaturation
BrittlenessBrittleness
MineralogyMineralogy PermeabilityPermeability
Pore Pressure
Pore Pressure
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Potential Supply of Potential Supply of Natural Gas in the Natural Gas in the United StatesUnited States
Report of theReport of thePotential Gas CommitteePotential Gas Committee(December 31, 2008)(December 31, 2008)
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Regional Resource AssessmentRegional Resource Assessment
Data source: Potential Gas Committee (2009)
Traditional 1,673.4 TcfCoalbed 163.0 TcfTotal U.S. 1,836.4 Tcf
Traditional 1,673.4 TcfCoalbed 163.0 TcfTotal U.S. 1,836.4 Tcf
353.517.3
455.23.4
24.016.6
193.857.0
51.32.6
274.97.5
374.451.9
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PGC Resource Assessments, 1990-PGC Resource Assessments, 1990-20082008
Data source: Potential Gas Committee (2009)
Total Potential Gas Resources (mean values)Total Potential Gas Resources (mean values)
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Possible Constraints on Future Gas Possible Constraints on Future Gas SupplySupply
Sufficient Supply toMeet Demand
Sufficient Supply toMeet Demand
TechnologyTechnologyResource
BaseResource
Base
EnvironmentalConcerns
EnvironmentalConcerns
Skilled Workforce
Skilled Workforce
Regulatory &Land IssuesRegulatory &Land Issues
Gas PriceGas PricePipelineCapacityPipelineCapacity
Rig Availability
Rig Availability
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Potential Gas Agency