Thermal Gradient Holes

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Exploration Technique: Thermal Gradient Holes

Exploration Technique Information
Exploration Group: Drilling Techniques
Exploration Sub Group: Exploration Drilling
Parent Exploration Technique: Exploration Drilling
Information Provided by Technique
Lithology:
Stratigraphic/Structural:
Hydrological: Field wide fluid flow characteristics if an array of wells are drilled
Thermal: Mapping and projecting thermal anomalies
Cost Information
Low-End Estimate (USD): 5.00500 centUSD
0.005 kUSD
5.0e-6 MUSD
5.0e-9 TUSD
/ foot
Median Estimate (USD): 16.501,650 centUSD
0.0165 kUSD
1.65e-5 MUSD
1.65e-8 TUSD
/ foot
High-End Estimate (USD): 50.005,000 centUSD
0.05 kUSD
5.0e-5 MUSD
5.0e-8 TUSD
/ foot
Dictionary.png
Thermal Gradient Holes:
"A hole logged by a temperature probe to determine the thermal gradient. Usually involves a hole less than 500 ft deep drilled specifically for this purpose"
Other definitions:Wikipedia Reegle


 
Introduction
Thermal gradient holes are typically shallow holes that are drilled and surveyed with a temperature probe. Designing a drilling program that will maximize the information based on orientation of the reservoir and faults can reveal an abundance of information about the hydrogeology and thermal properties of the deeper hydrothermal system (Smith, 1983; Coolbaugh, et al., 2007). Innovations in measuring temperature profiles in wells and projecting thermal anomalies beyond the temperature measurements have led to moderately accurate depictions of the hydrologic system.
 
Use in Geothermal Exploration
Temperature gradient holes are very useful in revealing hydrothermal properties of a geothermal system, ultimately decreasing the risk associated with drilling deeper and wider wells for further exploration or production. Thermal gradient holes are used for locating broad hydrothermal characteristics of a resource. They do not have the accuracy of predicting reservoir temperatures or depths. Although, if an array of thermal gradient holes are drilled across a field then more details will be revealed about the resource and its hydrologic system. Thermal gradient holes can provide important information about a resource increasing the confidence and likelihood of targeting a high temperature resource.
 
Related Techniques
2-M Probe Survey is a similar technique, but much shallower, cheaper and quicker to deploy.











Page Area Activity Start Date Activity End Date Reference Material
Thermal Gradient Holes At Alum Area (DOE GTP) Alum Geothermal Area


Thermal Gradient Holes At Blue Mountain Geothermal Area (Fairbank & Niggemann, 2004) Blue Mountain Geothermal Area 1996 1999


Thermal Gradient Holes At Blue Mountain Geothermal Area (Fairbank & Ross, 1999) Blue Mountain Geothermal Area 1999 1999


Thermal Gradient Holes At Breitenbush Hot Springs Area (Ingebritsen, Et Al., 1993) Breitenbush Hot Springs Area


Thermal Gradient Holes At Central Nevada Seismic Zone Region (Pritchett, 2004) Central Nevada Seismic Zone Geothermal Region


Thermal Gradient Holes At Chena Area (Erkan, Et. Al., 2008) Chena Area


Thermal Gradient Holes At Chena Geothermal Area (EERE, 2010) Chena Geothermal Area 2009 2010


Thermal Gradient Holes At Chena Geothermal Area (Erkan, Et Al., 2007) Chena Geothermal Area 2005 2007


Thermal Gradient Holes At Chena Geothermal Area (Holdmann, Et Al., 2006) Chena Geothermal Area 1998 2005


Thermal Gradient Holes At Chocolate Mountains Area (Alm, Et Al., 2010) Chocolate Mountains Area


Thermal Gradient Holes At Chocolate Mountains Area (Sabin, Et Al., 2010) Chocolate Mountains Area


Thermal Gradient Holes At Coso Geothermal Area (1974) Coso Geothermal Area 1974 1974


Thermal Gradient Holes At Coso Geothermal Area (1976) Coso Geothermal Area 1976 1976


Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2002) Cove Fort Geothermal Area


Thermal Gradient Holes At Cove Fort Area (Warpinski, Et Al., 2004) Cove Fort Geothermal Area


Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski, Et Al., 2002) Cove Fort Geothermal Area


Thermal Gradient Holes At Cove Fort Area - Vapor (Warpinski, Et Al., 2004) Cove Fort Geothermal Area


Thermal Gradient Holes At Crump's Hot Springs Area (DOE GTP) Crump's Hot Springs Geothermal Area


Thermal Gradient Holes At Fenton Hill HDR Geothermal Area (Purtymun, Et Al., 1974) Fenton Hill HDR Geothermal Area 1972


Thermal Gradient Holes At Fish Lake Valley Area (DOE GTP) Fish Lake Valley Area


Thermal Gradient Holes At Flint Geothermal Area (DOE GTP) Flint Geothermal Area


Thermal Gradient Holes At Fort Bidwell Area (Lafleur, Et Al., 2010) Fort Bidwell Area


Thermal Gradient Holes At Fort Bliss Area (DOE GTP) Fort Bliss Area


Thermal Gradient Holes At Glass Mountain Area (Cumming And Mackie, 2007) Glass Mountain Geothermal Area


Thermal Gradient Holes At Hawthorne Area (Lazaro, Et Al., 2010) Hawthorne Area


Thermal Gradient Holes At Hawthorne Area (Sabin, Et Al., 2010) Hawthorne Area


Thermal Gradient Holes At Hot Pot Area (DOE GTP) Hot Pot Area


Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Hot Springs Ranch Area


Thermal Gradient Holes At Hualalai Northwest Rift Area (Thomas, 1986) Hualalai Northwest Rift Area


Thermal Gradient Holes At Kilauea East Rift Area (Quane, Et Al., 2000) Kilauea East Rift Area


Thermal Gradient Holes At Kilauea East Rift Geothermal Area (Thomas, 1986) Kilauea East Rift Geothermal Area 1978 1987


Thermal Gradient Holes At Kilauea Summit Area (Keller, Et Al., 1979) Kilauea Summit Area


Thermal Gradient Holes At Lake City Hot Springs Area (Warpinski, Et Al., 2004) Lake City Hot Springs Area


Thermal Gradient Holes At Lightning Dock Area (Cunniff & Bowers, 2005) Lightning Dock Area


Thermal Gradient Holes At Lightning Dock Area (Warpinski, Et Al., 2004) Lightning Dock Area


Thermal Gradient Holes At Lightning Dock Geothermal Area (Arnold, Et Al., 1978) Lightning Dock Geothermal Area 1977 1977


Thermal Gradient Holes At Lightning Dock Geothermal Area (Cunniff & Bowers, 2005) Lightning Dock Geothermal Area 2003 2005


Thermal Gradient Holes At Lightning Dock Geothermal Area (Cunniff, Et Al., 2003) Lightning Dock Geothermal Area 2003 2003


Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Conservation, 2009) Long Valley Caldera Geothermal Area 1991 1991


Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Farrar, Et Al., 2003) Long Valley Caldera Geothermal Area 1998 2002


Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Lachenbruch, Et Al., 1976) Long Valley Caldera Geothermal Area 1962 1973


Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1978) Long Valley Caldera Geothermal Area 1978 1985


Thermal Gradient Holes At Long Valley Caldera Geothermal Area (Sorey, Et Al., 1991) Long Valley Caldera Geothermal Area 1985 1988


Thermal Gradient Holes At Mccoy Geothermal Area (DOE GTP) Mccoy Geothermal Area


Thermal Gradient Holes At Mcgee Mountain Area (DOE GTP) Mcgee Mountain Area


Thermal Gradient Holes At Mt Princeton Hot Springs Geothermal Area (Held & Henderson, 2012) Mt Princeton Hot Springs Geothermal Area 1973 1975


Thermal Gradient Holes At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2010) Neal Hot Springs Geothermal Area 2009 2010


Thermal Gradient Holes At Newberry Caldera Area (DOE GTP) Newberry Caldera Area


Thermal Gradient Holes At North Brawley Geothermal Area (Edmunds & W., 1977) North Brawley Geothermal Area 1977 1977


Thermal Gradient Holes At North Brawley Geothermal Area (Matlick & Jayne, 2008) North Brawley Geothermal Area 1970 1975


Thermal Gradient Holes At Northern Basin & Range Region (Pritchett, 2004) Northern Basin and Range Geothermal Region


Thermal Gradient Holes At Nw Basin & Range Region (Pritchett, 2004) Northwest Basin and Range Geothermal Region


Thermal Gradient Holes At Obsidian Cliff Area (Hulen, Et Al., 2003) Obsidian Cliff Area


Thermal Gradient Holes At Pilgrim Hot Springs Area (DOE GTP) Pilgrim Hot Springs Area


Thermal Gradient Holes At Roosevelt Hot Springs Geothermal Area (Ward, Et Al., 1978) Roosevelt Hot Springs Geothermal Area 1978 1978


Thermal Gradient Holes At Salt Wells Area (Bureau of Land Management, 2009) Salt Wells Geothermal Area 2008 2008


Thermal Gradient Holes At San Emidio Desert Area (DOE GTP) San Emidio Desert Area


Thermal Gradient Holes At Silver Peak Area (DOE GTP) Silver Peak Area


Thermal Gradient Holes At Socorro Mountain Area (Owens, Et Al., 2005) Socorro Mountain Area


Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al., 2008) Spencer Hot Springs Geothermal Area


Thermal Gradient Holes At Tungsten Mountain Area (Kratt, Et Al., 2008) Tungsten Mountain Area


Thermal Gradient Holes At Tungsten Mountain Area (Shevenell, Et Al., 2008) Tungsten Mountain Area


Thermal Gradient Holes At Twenty-Nine Palms Area (Page, Et Al., 2010) Twenty-Nine Palms Geothermal Area


Thermal Gradient Holes At Twenty-Nine Palms Area (Sabin, Et Al., 2010) Twenty-Nine Palms Geothermal Area


Thermal Gradient Holes At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Upper Hot Creek Ranch Area


Thermal Gradient Holes At Walker-Lane Transitional Zone Region (Pritchett, 2004) Walker-Lane Transition Zone Geothermal Region


Thermal Gradient Holes At Waunita Hot Springs Geothermal Area (Zacharakis, 1981) Waunita Hot Springs Geothermal Area 1981 1981

Document # Analysis
Type
Applicant Geothermal
Area
Lead
Agency
District
Office
Field
Office
Mineral
Manager
Surface
Manager
Development
Phase(s)
Techniques
DNA-NV-030-09-03 DNA Dusty Miller LLC Gabbs Valley Geothermal Area BLM BLM Carson City District Office BLM Stillwater Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-CA-EA-2002-??? EA Calpine Corporation (Calpine) and CPN Telephone Flat Inc. (CPN) Glass Mountain Geothermal Area BLM BLM BLM Geothermal/Well Field Exploration Drilling
Thermal Gradient Holes
DOI-BLM-ID-B010-2010-0083-CX CX Agua Caliente BLM Idaho State Office BLM Boise District Office BLM Four Rivers Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-B020-2008-????-?? Sierra Geothermal Power Reese River Geothermal Area Bureau of Land Management BLM Battle Mountain District Office Geothermal/Exploration Seismic Techniques
Thermal Gradient Holes
DOI-BLM-NV-B020-2010-????-CX CX Ormat Technologies Inc BLM Nevada State Office BLM Battle Mountain District Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-2009-0006-EA EA Gradient Resources Salt Wells Geothermal Area BLM Stillwater Field Office BLM Carson City District Office BLM Stillwater Field Office BLM Stillwater Field Office BLM Stillwater Field Office Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-2009-0030-CX CX Vulcan Power Company Carson Lake Corral Geothermal Area BLM BLM Carson City District Office BLM Stillwater Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-2010-0006-DNA DNA Ormat Nevada Inc Gabbs Valley Geothermal Area BLM Nevada State Office BLM Carson City District Office BLM Stillwater Field Office BLM BLM Geothermal/Exploration Drilling Techniques
Thermal Gradient Holes
DOI-BLM-NV-C010-2010-0052-CX CX Magma Energy Soda Lake Geothermal Area BLM Nevada State Office BLM Carson City District Office BLM Stillwater Field Office Geothermal/Exploration Drilling Techniques
Thermal Gradient Holes
DOI-BLM-NV-C010-2011-0516-EA EA Ormat Technologies Inc Dixie Meadows Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration
Geothermal/Well Field
Drilling Techniques
Thermal Gradient Holes
DOI-BLM-NV-C010-2012-0057-CX CX Ormat Technologies Inc Dixie Meadows Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-2012-0069-CX CX Ormat Technologies Inc Aqua Quieta Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-2013-0022-DNA DNA Ormat Technologies Inc Dixie Meadows Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-C010-????-????-CX CX Ormat Technologies Inc Dixie Valley Geothermal Area Bureau of Land Management BLM Carson City District Office Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-CO10-2011-0501-EA EA Gradient Resources Patua Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office BLM Geothermal/Well Field Thermal Gradient Holes
Production Wells
DOI-BLM-NV-E030-2011-0017-CX CX USGS BLM Nevada State Office BLM Elko District Office Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-W010-2010-0043-CX-2 CX Geothermal Technical Partners McGee Mountain Geothermal Area Bureau of Land Management BLM Winnemucca District Office BLM Humboldt River Field Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Geophysical Techniques
Slim Holes
Thermal Gradient Holes
Well Testing Techniques
DOI-BLM-NV-W030-2012-0020-CX CX Nevada Bureau of Mines and Geology Pinto Hot Springs Geothermal Area BLM BLM Winnemucca District Office Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-NV-WO10-2014-0002-CX CX Ormat Technologies Inc Baltazor Hot Springs Geothermal Area BLM Humboldt River Field Office BLM Winnemucca District Office BLM Humboldt River Field Office BLM Nevada State Office BLM Nevada State Office Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-OR-P000-2012-0043-CX CX Ormat Technologies Inc Twilight Geothermal Area BLM Oregon State Office BLM Prineville District Office United States Forest Service Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-UT-W019-2011-0006-CX CX Utah Geological Survey BLM Utah State Office BLM West Desert District Office Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-UT-W019-2011-0007-CX CX Utah Geological Survey BLM Utah State Office BLM Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-UT-W020-2009-0028-EA EA Standard Steam Trust LLC Drum Mountain Geothermal Area Bureau of Land Management BLM West Desert District Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration Thermal Gradient Holes
DOI-BLM-UT-W020-2010-0042-EA EA Ormat Technologies Inc Bureau of Land Management BLM West Desert District Office Bureau of Land Management Bureau of Land Management Geothermal/Exploration
Geothermal/Well Field
Thermal Gradient Holes
DOI-LM-NV-W010-2012-0061-CX CX Nevada Bureau of Mines and Geology Desert Queen Geothermal Area BLM BLM Winnemucca District Office BLM Humboldt River Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes
EA for Well Field Development at Patua Geothermal Area - DOI-BLM-NV-C010-2011-00016-EA EA Gradient Resources Patua Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management Bureau of Land Management
Bureau of Reclamation
Geothermal/Exploration
Geothermal/Well Field
Drilling Techniques
Exploratory Well
Thermal Gradient Holes
EA-NV-030-07-006 EA Ormat Technologies Inc Carson Lake Corral Geothermal Area Bureau of Land Management BLM Carson City District Office BLM Stillwater Field Office Bureau of Land Management BLM
Bureau of Reclamation
Geothermal/Well Field Exploration Drilling
Slim Holes
Thermal Gradient Holes
NEPA Process for Geothermal Power Plants in the Deschutes National Forest EIS Cal Energy Newberry Caldera Geothermal Area USFS
BLM
Geothermal/Exploration
Geothermal/Well Field
Geothermal/Power Plant
Exploration Drilling
Exploratory Boreholes
Production Wells
Thermal Gradient Holes
NV-020-08-DNA-52 DNA Gerlach Geothermal LLC BLM BLM Winnemucca District Office Geothermal/Exploration Thermal Gradient Holes
NV-063-EA06-098 EA Sierra Geothermal Power Reese River Geothermal Area Bureau of Land Management BLM Battle Mountain District Office BLM BLM Geothermal/Exploration Slim Holes
Thermal Gradient Holes
NV-EA-030-07-05 EA Vulcan Power Company Salt Wells Geothermal Area BLM BLM Carson City District Office BLM Stillwater Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes
NVN-088205 EA Ormat Technologies Inc Gabbs Valley Geothermal Area BLM Stillwater Field Office BLM Carson City District Office BLM Stillwater Field Office BLM Stillwater Field Office BLM Stillwater Field Office Geothermal/Exploration Exploratory Well
Observation Wells
Thermal Gradient Holes
NVN-89534 CU Nevada Geothermal Power Blue Mountain Geothermal Area BLM Nevada State Office BLM Winnemucca District Office BLM Humboldt River Field Office BLM BLM Geothermal/Exploration Thermal Gradient Holes


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