Mission: to characterize and assess geothermal energy resources in the United States and to work with the Department of Energy and other partners to advance the technologies applied to discover, characterize, and utilize those resources.
Geothermal energy is a significant source of renewable electric power in the western United States and, with advances in exploration and development technologies, a potential source of a large fraction of baseload electric power for the entire country. The USGS Geothermal Resource Investigations Project is focused on advancing geothermal research through a better understanding of geothermal resources and the impacts of geothermal development. This is achieved by applying a wide range of research methods to characterize resource occurrences, perform monitoring, and develop resource assessments. The project team works closely with a number of external collaborators from federal and state agencies, academia and industry on projects throughout the US and internationally (provide link to map of field study areas).
Overview
Based on current projections, the United States faces the need to increase its electrical power generating capacity by approximately 300,000 Megawatts-electrical (MWe) over the next 20 years. A critical question for future energy planning is the extent to which geothermal resources can contribute to this increasing demand for electricity. Geothermal energy constitutes one of the nation’s largest sources of renewable and environmentally benign electric power, yet the installed capacity of approximately 3000 MWe falls short of the estimated resources.
The USGS 2008 National geothermal resource assessment (provide link to 2008 assessment) estimated potential power production capacity from identified and undiscovered conventional geothermal resources at approximately 40,000 MWe. In addition, a provisional evaluation of the potential from Enhanced Geothermal Systems (EGS) was estimated to be approximately 518,000 MWe. This indicates that substantial geothermal resources are available to contribute to the nation’s electric power mix.
Still, significant questions remain regarding the nature and extent of undiscovered conventional geothermal resources as well as the viability of EGS as a new technology for producing geothermal electric power. This project is focused on addressing these issues as well as producing comprehensive databases of geothermal information compiled in the course of the assessment work, expanding the scope of the 2008 assessment to lower temperatures and other unconventional geothermal resource types, and conducting further research into the nature of geothermal resources in order to develop improved methodologies for future assessments.
The project addresses key issues related to geothermal resources through a number of activities:
- Database development - compiling and making publicly-available relevant data from geothermal exploration, development and assessment studies
- Resource Assessments - developing improved techniques for assessing geothermal resources and expanding the national assessment to cover both conventional and unconventional geothermal resources
- Hydrothermal field studies - conducting field investigations and modeling to understand the spatial and temporal occurrence, and evolution of targeted, prioritized natural hydrothermal systems.
- Enhance Geothermal Systems (EGS) – characterizing the unconventional Enhanced/Engineered Geothermal Systems (EGS) resource base and evaluating the implications of EGS development.
- Other unconventional resources – studying low temperature and sedimentary basin geothermal resources (from thermal aquifers to deep basin brines) to characterize their resource potential and understand the factors controlling their formation.
- Impacts of geothermal development - monitoring and modeling the effects of geothermal production including Induced seismicity associated with fluid injection, as well as impacts that expanding production may have on groundwater and vegetation.
Research Highlights
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Below are publications associated with this project.
An approach to modeling coupled thermal-hydraulic-chemical processes in geothermal systems
Temperature data from wells in Long Valley Caldera, California
The thermal regime in the resurgent dome of Long Valley Caldera, California: Inferences from precision temperature logs in deep wells
Assessment of Moderate- and High-Temperature Geothermal Resources of the United States
Geothermal energy: clean power from the Earth's heat
Below are data or web applications associated with this project.
- Overview
Mission: to characterize and assess geothermal energy resources in the United States and to work with the Department of Energy and other partners to advance the technologies applied to discover, characterize, and utilize those resources.
Geothermal energy is a significant source of renewable electric power in the western United States and, with advances in exploration and development technologies, a potential source of a large fraction of baseload electric power for the entire country. The USGS Geothermal Resource Investigations Project is focused on advancing geothermal research through a better understanding of geothermal resources and the impacts of geothermal development. This is achieved by applying a wide range of research methods to characterize resource occurrences, perform monitoring, and develop resource assessments. The project team works closely with a number of external collaborators from federal and state agencies, academia and industry on projects throughout the US and internationally (provide link to map of field study areas).
Overview
U.S. map showing current Geothermal Resource Study Areas. Based on current projections, the United States faces the need to increase its electrical power generating capacity by approximately 300,000 Megawatts-electrical (MWe) over the next 20 years. A critical question for future energy planning is the extent to which geothermal resources can contribute to this increasing demand for electricity. Geothermal energy constitutes one of the nation’s largest sources of renewable and environmentally benign electric power, yet the installed capacity of approximately 3000 MWe falls short of the estimated resources.
The USGS 2008 National geothermal resource assessment (provide link to 2008 assessment) estimated potential power production capacity from identified and undiscovered conventional geothermal resources at approximately 40,000 MWe. In addition, a provisional evaluation of the potential from Enhanced Geothermal Systems (EGS) was estimated to be approximately 518,000 MWe. This indicates that substantial geothermal resources are available to contribute to the nation’s electric power mix.
Still, significant questions remain regarding the nature and extent of undiscovered conventional geothermal resources as well as the viability of EGS as a new technology for producing geothermal electric power. This project is focused on addressing these issues as well as producing comprehensive databases of geothermal information compiled in the course of the assessment work, expanding the scope of the 2008 assessment to lower temperatures and other unconventional geothermal resource types, and conducting further research into the nature of geothermal resources in order to develop improved methodologies for future assessments.
The project addresses key issues related to geothermal resources through a number of activities:
- Database development - compiling and making publicly-available relevant data from geothermal exploration, development and assessment studies
- Resource Assessments - developing improved techniques for assessing geothermal resources and expanding the national assessment to cover both conventional and unconventional geothermal resources
- Hydrothermal field studies - conducting field investigations and modeling to understand the spatial and temporal occurrence, and evolution of targeted, prioritized natural hydrothermal systems.
- Enhance Geothermal Systems (EGS) – characterizing the unconventional Enhanced/Engineered Geothermal Systems (EGS) resource base and evaluating the implications of EGS development.
- Other unconventional resources – studying low temperature and sedimentary basin geothermal resources (from thermal aquifers to deep basin brines) to characterize their resource potential and understand the factors controlling their formation.
- Impacts of geothermal development - monitoring and modeling the effects of geothermal production including Induced seismicity associated with fluid injection, as well as impacts that expanding production may have on groundwater and vegetation.
Research Highlights
September 1-13, 2012, the USGS led a NASA-funded project, where a team of scientists and engineers, collected magnetic data using ground surveys and an aircraft that can fly without a pilot or crew, called an unmanned aerial system, or UAS, to map the geophysics below the surface of Surprise Valley, CA. The UAS shown here is known as SIERRA (Sensor Integrated Environmental Remote Research Aircraft).The Geothermal Project team is leading an effort, in collaboration with NASA Ames and a number of other institutions from academia and industry, developing Unmanned Aerial Systems for collecting airborne data to aid geothermal research. Akutan Island, in Alaska’s east-central Aleutian Islands, hosts the City of Akutan and is home to the largest seafood production facility in North America. It also hosts Akutan Volcano, one of the most active volcanoes in the United States. Read the full story, "USGS Potential Geothermal Resources for Akutan, Alaska." (Photo by Deborah Bergfeld, USGS) - Data
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- Publications
Below are publications associated with this project.
Filter Total Items: 29An approach to modeling coupled thermal-hydraulic-chemical processes in geothermal systems
Interactions between hydrothermal fluids and rock alter mineralogy, leading to the formation of secondary minerals and potentially significant physical and chemical property changes. Reactive transport simulations are essential for evaluating the coupled processes controlling the geochemical, thermal and hydrological evolution of geothermal systems. The objective of this preliminary investigationTemperature data from wells in Long Valley Caldera, California
The 30-by-20-km Long Valley Caldera (LVC) in eastern California (fig.1) formed at 0.76 Ma in a cataclysmic eruption that resulted in the deposition of 600 km? of Bishop Tuff outside the caldera rim (Bailey, 1989). By approximately 0.6 Ma, uplift of the central part of the caldera floor and eruption of rhyolitic lava formed the resurgent dome. The most recent eruptive activity in the area occurredThe thermal regime in the resurgent dome of Long Valley Caldera, California: Inferences from precision temperature logs in deep wells
Long Valley Caldera in eastern California formed 0.76Ma ago in a cataclysmic eruption that resulted in the deposition of 600km3 of Bishop Tuff. The total current heat flow from the caldera floor is estimated to be ~290MW, and a geothermal power plant in Casa Diablo on the flanks of the resurgent dome (RD) generates ~40MWe. The RD in the center of the caldera was uplifted by ~80cm between 1980 andAssessment of Moderate- and High-Temperature Geothermal Resources of the United States
Scientists with the U.S. Geological Survey (USGS) recently completed an assessment of our Nation's geothermal resources. Geothermal power plants are currently operating in six states: Alaska, California, Hawaii, Idaho, Nevada, and Utah. The assessment indicates that the electric power generation potential from identified geothermal systems is 9,057 Megawatts-electric (MWe), distributed over 13 staGeothermal energy: clean power from the Earth's heat
Societies in the 21st century require enormous amounts of energy to drive the machines of commerce and to sustain the lifestyles that many people have come to expect. Today, most of this energy is derived from oil, natural gas, and coal, supplemented by nuclear power. Local exceptions exist, but oil is by far the most common source of energy worldwide. Oil resources, however, are nonrenewable and - Web Tools
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