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Geothermal Permitting and NEPA Timeline Analysis
In this analysis, we outline the types of NEPA-related analyses and approvals (e.g., environmental assessment), and we provide examples of geothermal development activities (e.g., well drilling) that might require each type of approval, including an overview and discussion of the ...
Young, K. et al National Renewable Energy Laboratory
Sep 30, 2014
5 Resources
0 Stars
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5 Resources
0 Stars
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Geothermal Project NEPA Database
During the 2013 fiscal year, the National Renewable Energy Laboratory (NREL) developed the Geothermal National Environmental Policy Act (NEPA) Database with funding provided by the U.S. Department of Energy (DOE) Geothermal Technologies Office (GTO). The information in the databas...
Young, K. and Levine, A. National Renewable Energy Laboratory
Sep 30, 2014
4 Resources
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4 Resources
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Geothermal Development and the Use of Categorical Exclusions Under NEPA
This study focuses primarily on the Categorial Exclusions (CX) process and its applicability to geothermal exploration. In this paper, we:
Provide generalized background information on CXs, including previous NEPA reports addressing CXs, the process for developing CXs, and the ro...
Young, K. and Levine, A. National Renewable Energy Laboratory
Sep 30, 2014
4 Resources
0 Stars
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4 Resources
0 Stars
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Coordinating Permit Offices and the Development of Utility-Scale Geothermal Energy
This study examines various forms of coordinating permit offices at the state and federal level in the western United States, discusses inefficiencies and mitigation techniques for permitting natural resource projects, analyzes whether various approaches are easily adaptable to ut...
Young, K. et al National Renewable Energy Laboratory
Sep 30, 2013
2 Resources
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2 Resources
0 Stars
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Funding Mechanisms for Federal Geothermal Permitting
This submission includes a presentation and paper for the Geothermal Resources Council (GRC) that discuss:
Federal agency revenues received for geothermal projects, including: (1) lease revenues, (2) fixed fees, and (3) cost recovery fees for the Bureau of Land Management (BLM) a...
Young, K. et al National Renewable Energy Laboratory
Sep 30, 2013
2 Resources
0 Stars
Curated
2 Resources
0 Stars
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Chemical Impact of Elevated CO2 on Geothermal Energy Production
Numerical simulations have shown that the use of supercritical CO2 instead of water as a heat transfer fluid yields significantly greater heat extraction rates for geothermal energy. If this technology is implemented successfully, it could increase geothermal energy production and...
Carroll, S. et al Lawrence Livermore National Laboratory
Jan 01, 2013
3 Resources
0 Stars
Publicly accessible
3 Resources
0 Stars
Publicly accessible
Validation of Innovative Exploration Technologies for Newberry Volcano: GRC Paper on Geothermal Exploration at Newberry
Validation of Innovative Exploration Technologies for Newberry Volcano: 2012 GRC Paper Geothermal Exploration at Newberry
Waibel, A. et al Davenport Newberry Holdings, LLC
May 31, 2012
1 Resources
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Publicly accessible
1 Resources
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Technology Development and Field Trials of EGS Drilling Systems at Chocolate Mountain
Polycrystalline diamond compact (PDC) bits are routinely used in the oil and gas industry for drilling medium to hard rock but have not been adopted for geothermal drilling, largely due to past reliability issues and higher purchase costs. The Sandia Geothermal Research Departmen...
Knudsen, S. et al Sandia National Laboratories
Jan 01, 2012
3 Resources
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Publicly accessible
3 Resources
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Modeling Responses of Naturally Fractured Geothermal Reservoir to Low-Pressure Stimulation
Hydraulic shearing is an appealing reservoir stimulation strategy for Enhanced Geothermal Systems. It is believed that hydro-shearing is likely to simulate a fracture network that covers a relatively large volume of the reservoir whereas hydro-fracturing tends to create a small nu...
Fu, P. and Carrigan, C. Lawrence Livermore National Laboratory
Jan 01, 2012
2 Resources
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2 Resources
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Simulation Tools for Modeling Thermal Spallation Drilling on Multiple Scales
Widespread adoption of geothermal energy will require access to deeply buried resources in granitic basement rocks at high temperatures and pressures. Exploiting these resources necessitates novel methods for drilling, stimulation, and maintenance, under operating conditions that ...
Walsh, S. et al Lawrence Livermore National Laboratory
Jan 01, 2012
1 Resources
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1 Resources
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Geomechanical Modeling for Thermal Spallation Drilling
Wells for Engineered Geothermal Systems (EGS) typically occur in conditions presenting significant challenges for conventional rotary and percussive drilling technologies: granitic rocks that reduce drilling speeds and cause substantial equipment wear. Thermal spallation drilling,...
Walsh, S. et al Lawrence Livermore National Laboratory
Aug 24, 2011
1 Resources
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1 Resources
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Investigation of Stimulation-Response Relationships for Complex Fracture Systems in Enhanced Geothermal Reservoirs
Hydraulic fracturing is currently the primary method for stimulating low-permeability geothermal reservoirs and creating Enhanced (or Engineered) Geothermal Systems (EGS) with improved permeability and heat production efficiency. Complex natural fracture systems usually exist in ...
Fu, P. et al Lawrence Livermore National Laboratory
Jan 01, 2011
2 Resources
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2 Resources
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Preliminary Analysis of Stress in the Newberry EGS Well NWG 55-29
As part of the planning for stimulation of the Newberry Volcano Enhanced Geothermal Systems (EGS) Demonstration project in Oregon, a high-resolution borehole televiewer (BHTV) log was acquired using the ALT ABI85 BHTV tool in the slightly deviated
NWG 55-29 well. The image log rev...
Davatzes, N. and Hickman, S. National Energy Technology Laboratory
Jan 01, 2011
1 Resources
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1 Resources
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Utah FORGE: Nevada Crustal Strain
An estimate of the total magnitude of crustal strain in Nevada (2nd invariant of the strain rate), independent of fault orientation. Crustal strain based on GPS station measurements. Nevada Bureau of Mines and Geology.
Blewitt, G. et al Energy and Geoscience Institute at the University of Utah
Oct 01, 2004
2 Resources
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2 Resources
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