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U.S. Shale Gas Resources, Reserves and $$$. John B. Curtis Potential Gas Agency Colorado School of Mines. Location of U.S Shale Gas Plays. U.S. Energy Information Agency, March 2010. The Resource Pyramid. Conventional Reservoirs: Small Volumes, Easy to Develop. Oil. Gas.
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U.S. Shale Gas Resources, Reserves and $$$ John B. Curtis Potential Gas Agency Colorado School of Mines
Location of U.S Shale Gas Plays U.S. Energy Information Agency, March 2010
The Resource Pyramid Conventional Reservoirs: Small Volumes, Easy to Develop Oil Gas Unconventional Reservoirs: Large Volumes, Hard to Develop Improving Technology Tight Oil; Heavy Oil; Bituminous Sands Increasing Product Price Tight Gas Sands; CBM; Gas Shales Huge Volumes, Difficult to Develop Gas Hydrates Oil Shale Province Resource Size (S. Sonnenberg, CSM)
Shale Gas Annual Production and Energy Information Administration (EIA) Forecast EnCana
Acquisitions – >$50 Billion Source: Trollart.com – Ray Troll
Source:devonenergy.com Source:devonenergy.com Resource Development – >$15 Billion Source:AAPG Source:chiefoiland gas.com Source:AAPG
Shale Gas Reservoir Mechanisms U.S. DOE
Exploration 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
Organic Richness Maturation Thickness Gas-In-Place Productivity Mineralogy Permeability Brittleness Pore Pressure Some Elements of a Successful Shale Gas Play
Potential Supply of Natural Gas in the United States Report of the Potential Gas Committee (December 31, 2008)
Regional Resource Assessment Traditional 1,673.4 Tcf Coalbed 163.0 Tcf Total U.S. 1,836.4 Tcf 374.4 51.9 51.3 2.6 24.0 16.6 353.5 17.3 274.9 7.5 455.2 3.4 193.8 57.0 Data source: Potential Gas Committee (2009)
PGC Resource Assessments, 1990-2008 Total Potential Gas Resources (mean values) Data source: Potential Gas Committee (2009)
Environmental Concerns Skilled Workforce Resource Base Technology Sufficient Supply to Meet Demand Gas Price Pipeline Capacity Regulatory & Land Issues Rig Availability Possible Constraints on Future Gas Supply