National Library of Energy BETA

Sample records for geothermal systems egs

  1. track 4: enhanced geothermal systems (EGS) | geothermal 2015...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4: enhanced geothermal systems (EGS) | geothermal 2015 peer review track 4: enhanced geothermal systems (EGS) | geothermal 2015 peer review The Energy Department pursues research ...

  2. Enhanced Geothermal Systems (EGS) | Open Energy Information

    Open Energy Info (EERE)

    DOE EGS Technical Roadmap DOE EGS Systems Demonstration Projects How EGS Works (Animation) EGS Development (Animation) EGS Schematic.jpg Dictionary.png Enhanced Geothermal...

  3. track 4: enhanced geothermal systems (EGS) | geothermal 2015 peer review |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy 4: enhanced geothermal systems (EGS) | geothermal 2015 peer review track 4: enhanced geothermal systems (EGS) | geothermal 2015 peer review The Energy Department pursues research in transformative science and engineering that the private sector is not financially or technically equipped to undertake. At the 2015 Peer Review, awardees in the Geothermal Technologies Office portfolio presented fifty three technical project presentations on enhanced geothermal systems

  4. Enhanced Geothermal System (EGS) Fact Sheet

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    An Enhanced Geothermal System (EGS) is a man-made reservoir, created where there is hot rock but insufficient or little natural permeability or fluid saturation. In an EGS, fluid ...

  5. Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy

    Energy Savers [EERE]

    Enhanced Geothermal System (EGS) Fact Sheet Enhanced Geothermal System (EGS) Fact Sheet Overview of Enhanced Geothermal Systems. PDF icon egsbasics.pdf More Documents &...

  6. First Commercial Success for Enhanced Geothermal Systems (EGS...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy First Commercial Success for Enhanced Geothermal Systems (EGS) Spells ...

  7. First Commercial Success for Enhanced Geothermal Systems (EGS...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    First Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy First Commercial Success for Enhanced Geothermal Systems (EGS) Spells ...

  8. Enhanced Geothermal Systems (EGS)- the Future of Geothermal Energy

    Broader source: Energy.gov [DOE]

    While the amount of conventional hydrothermal power worldwide has reached nearly 12 gigawatts, exponentially more geothermal resources can be accessed through next-generation technologies known as enhanced geothermal systems (EGS).

  9. Enhanced Geothermal System (EGS) Fact Sheet

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    While advanced EGS technologies are young and still under development, EGS has been ... of Technology (MIT). 2006. The future of geothermal energy. Cambridge, Massachusetts. ...

  10. Enhanced Geothermal Systems (EGS) comparing water with CO2 as...

    Office of Scientific and Technical Information (OSTI)

    Enhanced Geothermal Systems (EGS) comparing water with CO2 as heattransmission fluids Citation Details In-Document Search Title: Enhanced Geothermal Systems (EGS) comparing water ...

  11. Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Enhanced Geothermal System (EGS) Fact Sheet Enhanced Geothermal Systems (EGS) are engineered reservoirs created to produce energy from geothermal resources that are otherwise not economical due to lack of water and/or permeability. EGS technology has the potential for accessing the earth's vast resources of heat located at depth to help meet the energy needs of the United States. Learn more about EGS from the Enhanced Geothermal Systems Fact Sheet below. PDF icon Enhanced Geothermal Systems Fact

  12. First Commercial Success for Enhanced Geothermal Systems (EGS) Spells

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Exponential Growth for Geothermal Energy | Department of Energy Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy First Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy April 15, 2013 - 1:50pm Addthis Nevada-based industry partner Ormat Technologies leveraged DOE funds to deploy the nation's first commercial EGS at Desert Peak, Nevada. photo courtesy of Ormat Nevada-based industry

  13. Enhanced Geothermal Systems (EGS) comparing water with CO2 as...

    Office of Scientific and Technical Information (OSTI)

    (EGS) comparing water with CO2 as heattransmission fluids Citation Details In-Document Search Title: Enhanced Geothermal Systems (EGS) comparing water with CO2 as ...

  14. Enhanced Geothermal System (EGS) Fact Sheet

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    1 Massachusetts Institute of Technology (MIT). 2006. The future of geothermal energy. Cambridge, Massachusetts. Available: http:geothermal.inel.govpublications...

  15. Enhanced Geothermal System (EGS) Infographic | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Enhanced Geothermal System (EGS) Infographic Enhanced Geothermal System (EGS) Infographic Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California The EGS infographic provides an overview of this burgeoning technology that could access an enormous, domestic, clean energy resource predicted at more than 100 GW in the United States alone, according to an MIT study. To take advantage of this vast

  16. Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Overview of Enhanced Geothermal Systems. PDF icon egs_calpine_peer2013.pdf More Documents & Publications Demonstration of an Enhanced Geothermal System at the Northwest Geysers Geothermal Field, California EA-1733: Final Environmental Assessment Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir

  17. Enhanced Geothermal Systems (EGS) | Open Energy Information

    Open Energy Info (EERE)

    (Published: July 2009) "US DOE 2008 Renewable Energy Data Book" "The Future of Geothermal Energy" 3.0 3.1 3.2 "US DOE EERE Geothermal Technologies Program, Enhanced...

  18. track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review

    Broader source: Energy.gov [DOE]

    The Energy Department pursues research in transformative science and engineering that the private sector is not financially or technically equipped to undertake. At the 2015 Peer Review, awardees in the Geothermal Technologies Office portfolio presented fifty three technical project presentations on enhanced geothermal systems technologies.

  19. What is an Enhanced Geothermal System (EGS)? Fact Sheet

    SciTech Connect (OSTI)

    U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy

    2012-09-14

    This Geothermal Technologies Office fact sheet explains how engineered geothermal reservoirs called Enhanced Geothermal Systems are used to produce energy from geothermal resources that are otherwise not economical due to a lack of fluid and/or permeability.

  20. track 3: enhanced geothermal systems (EGS) | geothermal 2015...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    drilling and pressurized water to capture energy from ... science and engineering that the private sector ... PDF icon Track3EGS3.6DeepSedimentarySystemsMoore-Al...

  1. Enhanced Geothermal Systems (EGS) R&D Program: Monitoring EGS-Related Research

    SciTech Connect (OSTI)

    McLarty, Lynn; Entingh, Daniel; Carwile, Clifton

    2000-09-29

    This report reviews technologies that could be applicable to Enhanced Geothermal Systems development. EGS covers the spectrum of geothermal resources from hydrothermal to hot dry rock. We monitored recent and ongoing research, as reported in the technical literature, that would be useful in expanding current and future geothermal fields. The literature review was supplemented by input obtained through contacts with researchers throughout the United States. Technologies are emerging that have exceptional promise for finding fractures in nonhomogeneous rock, especially during and after episodes of stimulation to enhance natural permeability.

  2. Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California The EGS fact sheet provides...

  3. Enhanced Geothermal Systems (EGS) R&D Program

    SciTech Connect (OSTI)

    Entingh, Daniel J.

    1999-08-18

    The purpose of this workshop was to develop technical background facts necessary for planning continued research and development of Enhanced Geothermal Systems (EGS). EGS are geothermal reservoirs that require improvement of their permeability or fluid contents in order to achieve economic energy production. The initial focus of this R&D program is devising and testing means to extract additional economic energy from marginal volumes of hydrothermal reservoirs that are already producing commercial energy. By mid-1999, the evolution of the EGS R&D Program, begun in FY 1988 by the U.S. Department of Energy (DOE), reached the stage where considerable expertise had to be brought to bear on what technical goals should be pursued. The main purpose of this Workshop was to do that. The Workshop was sponsored by the Office of Geothermal Technologies of the Department of Energy. Its purpose and timing were endorsed by the EGS National Coordinating Committee, through which the EGS R&D Program receives guidance from members of the U.S. geothermal industry. Section 1.0 of this report documents the EGS R&D Program Review Session. There, managers and researchers described the goals and activities of the program. Recent experience with injection at The Geysers and analysis of downhole conditions at Dixie Valley highlighted this session. Section 2.0 contains a number of technical presentations that were invited or volunteered to illuminate important technical and economic facts and opportunities for research. The emphasis here was on fi.acture creation, detection, and analysis. Section 3.0 documents the initial general discussions of the participants. Important topics that emerged were: Specificity of defined projects, Optimizing cost effectiveness, Main technical areas to work on, Overlaps between EGS and Reservoir Technology R&D areas, Relationship of microseismic events to hydraulic fractures, and Defining criteria for prioritizing research thrusts. Sections 4.0 and 5.0 report the meat of the Workshop. Section 4.0 describes the nomination and clarification of technical thrusts, and Section 5.0 reports the results of prioritizing those thrusts via voting by the participants. Section 6.0 contains two discussions conducted after the work on research thrusts. The topics were ''Simulation'' and ''Stimulation''. A number of technical points that emerged here provide important guidance for both practical field work on EGS systems and for research.

  4. Enhanced Geothermal Systems (EGS) well construction technology evaluation report.

    SciTech Connect (OSTI)

    Capuano, Louis, Jr.; Huh, Michael; Swanson, Robert; Raymond, David Wayne; Finger, John Travis; Mansure, Arthur James; Polsky, Yarom; Knudsen, Steven Dell

    2008-12-01

    Electricity production from geothermal resources is currently based on the exploitation of hydrothermal reservoirs. Hydrothermal reservoirs possess three ingredients critical to present day commercial extraction of subsurface heat: high temperature, in-situ fluid and high permeability. Relative to the total subsurface heat resource available, hydrothermal resources are geographically and quantitatively limited. A 2006 DOE sponsored study led by MIT entitled 'The Future of Geothermal Energy' estimates the thermal resource underlying the United States at depths between 3 km and 10 km to be on the order of 14 million EJ. For comparison purposes, total U.S. energy consumption in 2005 was 100 EJ. The overwhelming majority of this resource is present in geological formations which lack either in-situ fluid, permeability or both. Economical extraction of the heat in non-hydrothermal situations is termed Enhanced or Engineered Geothermal Systems (EGS). The technologies and processes required for EGS are currently in a developmental stage. Accessing the vast thermal resource between 3 km and 10 km in particular requires a significant extension of current hydrothermal practice, where wells rarely reach 3 km in depth. This report provides an assessment of well construction technology for EGS with two primary objectives: (1) Determining the ability of existing technologies to develop EGS wells. (2) Identifying critical well construction research lines and development technologies that are likely to enhance prospects for EGS viability and improve overall economics. Towards these ends, a methodology is followed in which a case study is developed to systematically and quantitatively evaluate EGS well construction technology needs. A baseline EGS well specification is first formulated. The steps, tasks and tools involved in the construction of this prospective baseline EGS well are then explicitly defined by a geothermal drilling contractor in terms of sequence, time and cost. A task and cost based analysis of the exercise is subsequently conducted to develop a deeper understanding of the key technical and economic drivers of the well construction process. Finally, future research & development recommendations are provided and ranked based on their economic and technical significance.

  5. Enhanced Geothermal Systems (EGS) R&D Program: US Geothermal Resources Review and Needs Assessment

    SciTech Connect (OSTI)

    Entingh, Dan; McLarty, Lynn

    2000-11-30

    The purpose of this report is to lay the groundwork for an emerging process to assess U.S. geothermal resources that might be suitable for development as Enhanced Geothermal Systems (EGS). Interviews of leading geothermists indicate that doing that will be intertwined with updating assessments of U.S. higher-quality hydrothermal resources and reviewing methods for discovering ''hidden'' hydrothermal and EGS resources. The report reviews the history and status of assessment of high-temperature geothermal resources in the United States. Hydrothermal, Enhanced, and Hot Dry Rock resources are addressed. Geopressured geothermal resources are not. There are three main uses of geothermal resource assessments: (1) They inform industry and other interest parties of reasonable estimates of the amounts and likely locations of known and prospective geothermal resources. This provides a basis for private-sector decisions whether or not to enter the geothermal energy business at all, and for where to look for useful resources. (2) They inform government agencies (Federal, State, local) of the same kinds of information. This can inform strategic decisions, such as whether to continue to invest in creating and stimulating a geothermal industry--e.g., through research or financial incentives. And it informs certain agencies, e.g., Department of Interior, about what kinds of tactical operations might be required to support such activities as exploration and leasing. (3) They help the experts who are performing the assessment(s) to clarify their procedures and data, and in turn, provide the other two kinds of users with a more accurate interpretation of what the resulting estimates mean. The process of conducting this assessment brings a spotlight to bear on what has been accomplished in the domain of detecting and understanding reservoirs, in the period since the last major assessment was conducted.

  6. Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission Fluid

    Broader source: Energy.gov [DOE]

    The overall objective of the research is to explore the feasibility of operating enhanced geothermal systems (EGS) with CO2as heat transmission fluid.

  7. Enhanced Geothermal Systems (EGS) with CO2 as Heat Transmission...

    Open Energy Info (EERE)

    Fluid Project Type Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type Topic 2 Supercritical...

  8. Enhanced Geothermal Systems (EGS) Well Construction Technology Evaluation Report

    SciTech Connect (OSTI)

    Polsky, Yarom; Capuano, Louis; Finger, John; Huh, Michael; Knudsen, Steve; Chip, A.J. Mansure; Raymond, David; Swanson, Robert

    2008-12-01

    This report provides an assessment of well construction technology for EGS with two primary objectives: 1. Determining the ability of existing technologies to develop EGS wells. 2. Identifying critical well construction research lines and development technologies that are likely to enhance prospects for EGS viability and improve overall economics.

  9. Geothermal EGS Demonstration Photo Library

    Broader source: Energy.gov [DOE]

    EGS Demonstrations make up the most advanced research and science investments in the geothermal sector. Five active demonstration sites nationwide are proving the spectrum of EGS potential, in and near existing hydrothermal operations, with infrastructure, and in the longer-term greenfield settings, where no previous geothermal development is operating.

  10. A man-made enhanced geothermal system (EGS) can extract the abundant heat resour

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    man-made enhanced geothermal system (EGS) can extract the abundant heat resource tens of thousands of feet below the surface and put it to good use. This would require: With an enhanced geothermal reservoir, you can generate power anywhere with hot rocks at depth! What makes EGS? + + Small pathways to conduct fluid through the hot rocks Fluid to carry heat from the rocks Abundant heat found in rocks at depth Abundant heat found in rocks at depth Limited pathways to conduct fluid Insufficient

  11. Egs Exploration Methodology Project Using the Dixie Valley Geothermal...

    Open Energy Info (EERE)

    Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

  12. Desert Peak East EGS Project; 2010 Geothermal Technology Program...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    East EGS Project; 2010 Geothermal Technology Program Peer Review Report Desert Peak East EGS Project; 2010 Geothermal Technology Program Peer Review Report DOE 2010 Geothermal...

  13. A man-made enhanced geothermal system (EGS) can extract the abundant...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Technologies Office + + An abundant, previously-stranded, heat source Permeable pathways enhanced by injected fluids Fluid injected from the surface Using 1 Gallon of ...

  14. Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code...

    Office of Scientific and Technical Information (OSTI)

    of an EGS Reservoir - Geothermal Code Comparison Study Citation Details In-Document Search Title: Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code Comparison Study ...

  15. Enhanced Geothermal Systems Demonstration Projects

    SciTech Connect (OSTI)

    Geothermal Technologies Office

    2013-08-06

    Several Enhanced Geothermal Systems (EGS) demonstration projects are highlighted on this Geothermal Technologies Office Web page.

  16. Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS)

    Broader source: Energy.gov [DOE]

    Project objectives: identify tracers with sorption properties favorable for EGS applications; apply reversibly sorbing tracers to determine the fracture-matrix interface area available for heat transfer; and; explore the feasibility of obtaining fracture-matrix interface area from non-isothermal; single-well injection-withdrawal (SWIW) tests.

  17. Development and Validation of an Advanced Stimulation Prediction Model for Enhanced Geothermal Systems (EGS)

    Broader source: Energy.gov [DOE]

    Project objectives: Develop a true 3D hydro-thermal fracturing and proppant flow/transport simulator that is particularly suited for EGS reservoir creation. Perform laboratory scale model tests of hydraulic fracturing and proppant flow/transport using a polyaxial loading device, and use the laboratory results to test and validate the 3D simulator.

  18. Well Monitoring System for EGS

    Broader source: Energy.gov [DOE]

    EGS well monitoring tools offer a unique set of solutions which will lower costs and increase confidence in future geothermal projects.

  19. Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code...

    Office of Scientific and Technical Information (OSTI)

    Conference: Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code Comparison Study Citation Details In-Document Search Title: Flow and Thermal Behavior of an EGS ...

  20. EERE Success Story-Oregon: DOE Advances Game-Changing EGS Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Technology at the Newberry Volcano | Department of Energy Oregon: DOE Advances Game-Changing EGS Geothermal Technology at the Newberry Volcano EERE Success Story-Oregon: DOE Advances Game-Changing EGS Geothermal Technology at the Newberry Volcano April 9, 2013 - 12:00am Addthis The AltaRock Enhanced Geothermal Systems (EGS) demonstration project, at Newberry Volcano near Bend, Oregon, represents a key step in geothermal energy development, demonstrating that an engineered geothermal

  1. Newberry Volcano EGS Demonstration Geothermal Project | Open...

    Open Energy Info (EERE)

    Known Geothermal Resource Area ("Newberry"). Four deep, high temperature, very low permeability, production-size wells have been completed at Newberry, including two currently...

  2. Water Use in Enhanced Geothermal Systems (EGS): Geology of U.S. Stimulation Projects, Water Costs, and Alternative Water Use Policies

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    2014-12-16

    According to the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE), geothermal energy generation in the United States is projected to more than triple by 2040 (EIA 2013). This addition, which translates to more than 5 GW of generation capacity, is anticipated because of technological advances and an increase in available sources through the continued development of enhanced geothermal systems (EGSs) and low-temperature resources (EIA 2013). Studies have shown that air emissions, water consumption, and land use for geothermal electricity generation have less of an impact than traditional fossil fuel?based electricity generation; however, the long-term sustainability of geothermal power plants can be affected by insufficient replacement of aboveground or belowground operational fluid losses resulting from normal operations (Schroeder et al. 2014). Thus, access to water is therefore critical for increased deployment of EGS technologies and, therefore, growth of the geothermal sector. This paper examines water issues relating to EGS development from a variety of perspectives. It starts by exploring the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects. It then examines the relative costs of different potential traditional and alternative water sources for EGS. Finally it summarizes specific state policies relevant to the use of alternative water sources for EGS, and finally explores the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects.

  3. Water Use in Enhanced Geothermal Systems (EGS): Geology of U.S. Stimulation Projects, Water Costs, and Alternative Water Use Policies

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    According to the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE), geothermal energy generation in the United States is projected to more than triple by 2040 (EIA 2013). This addition, which translates to more than 5 GW of generation capacity, is anticipated because of technological advances and an increase in available sources through the continued development of enhanced geothermal systems (EGSs) and low-temperature resources (EIA 2013). Studies have shown that air emissions, water consumption, and land use for geothermal electricity generation have less of an impact than traditional fossil fuel?based electricity generation; however, the long-term sustainability of geothermal power plants can be affected by insufficient replacement of aboveground or belowground operational fluid losses resulting from normal operations (Schroeder et al. 2014). Thus, access to water is therefore critical for increased deployment of EGS technologies and, therefore, growth of the geothermal sector. This paper examines water issues relating to EGS development from a variety of perspectives. It starts by exploring the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects. It then examines the relative costs of different potential traditional and alternative water sources for EGS. Finally it summarizes specific state policies relevant to the use of alternative water sources for EGS, and finally explores the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects.

  4. Life Cycle Water Consumption and Water Resource Assessment for Utility-Scale Geothermal Systems: An In-Depth Analysis of Historical and Forthcoming EGS Projects

    SciTech Connect (OSTI)

    Clark, Corrie E.; Harto, Christopher B.; Schroeder, Jenna N.; Martino, Louis E.; Horner, Robert M.

    2013-11-05

    This report is the third in a series of reports sponsored by the U.S. Department of Energy Geothermal Technologies Program in which a range of water-related issues surrounding geothermal power production are evaluated. The first report made an initial attempt at quantifying the life cycle fresh water requirements of geothermal power-generating systems and explored operational and environmental concerns related to the geochemical composition of geothermal fluids. The initial analysis of life cycle fresh water consumption of geothermal power-generating systems identified that operational water requirements consumed the vast majority of water across the life cycle. However, it relied upon limited operational water consumption data and did not account for belowground operational losses for enhanced geothermal systems (EGSs). A second report presented an initial assessment of fresh water demand for future growth in utility-scale geothermal power generation. The current analysis builds upon this work to improve life cycle fresh water consumption estimates and incorporates regional water availability into the resource assessment to improve the identification of areas where future growth in geothermal electricity generation may encounter water challenges. This report is divided into nine chapters. Chapter 1 gives the background of the project and its purpose, which is to assess the water consumption of geothermal technologies and identify areas where water availability may present a challenge to utility-scale geothermal development. Water consumption refers to the water that is withdrawn from a resource such as a river, lake, or nongeothermal aquifer that is not returned to that resource. The geothermal electricity generation technologies evaluated in this study include conventional hydrothermal flash and binary systems, as well as EGSs that rely on engineering a productive reservoir where heat exists, but where water availability or permeability may be limited. Chapter 2 describes the approach and methods for this work and identifies the four power plant scenarios evaluated: a 20-MW EGS binary plant, a 50-MW EGS binary plant, a 10-MW hydrothermal binary plant, and a 50-MW hydrothermal flash plant. The methods focus on (1) the collection of data to improve estimation of EGS stimulation volumes, aboveground operational consumption for all geothermal technologies, and belowground operational consumption for EGS; and (2) the mapping of the geothermal and water resources of the western United States to assist in the identification of potential water challenges to geothermal growth. Chapters 3 and 4 present the water requirements for the power plant life cycle. Chapter 3 presents the results of the current data collection effort, and Chapter 4 presents the normalized volume of fresh water consumed at each life cycle stage per lifetime energy output for the power plant scenarios evaluated. Over the life cycle of a geothermal power plant, from construction through 30 years of operation, the majority of water is consumed by plant operations. For the EGS binary scenarios, where dry cooling was assumed, belowground operational water loss is the greatest contributor depending upon the physical and operational conditions of the reservoir. Total life cycle water consumption requirements for air-cooled EGS binary scenarios vary between 0.22 and 1.85 gal/kWh, depending upon the extent of belowground operational water consumption. The air-cooled hydrothermal binary and flash plants experience far less fresh water consumption over the life cycle, at 0.04 gal/kWh. Fresh water requirements associated with air- cooled binary operations are primarily from aboveground water needs, including dust control, maintenance, and domestic use. Although wet-cooled hydrothermal flash systems require water for cooling, these plants generally rely upon the geofluid, fluid from the geothermal reservoir, which typically has high salinity and total dissolved solids concentration and is much warmer than normal groundwater sources, for their cooling water needs; thus, while there is considerable geofluid loss at 2.7 gal/kWh, fresh water consumption during operations is similar to that of aircooled binary systems. Chapter 5 presents the assessment of water demand for future growth in deployment of utility-scale geothermal power generation. The approach combines the life cycle analysis of geothermal water consumption with a geothermal supply curve according to resource type, levelized cost of electricity (LCOE), and potential growth scenarios. A total of 17 growth scenarios were evaluated. In general, the scenarios that assumed lower costs for EGSs as a result of learning and technological improvements resulted in greater geothermal potential, but also significantly greater water demand due to the higher water consumption by EGSs. It was shown, however, that this effect could be largely mitigated if nonpotable water sources were used for belowground operational water demands. The geographical areas that showed the highest water demand for most growth scenarios were southern and northern California, as well as most of Nevada. In addition to water demand by geothermal power production, Chapter 5 includes data on water availability for geothermal development areas. A qualitative analysis is included that identifies some of the basins where the limited availability of water is most likely to affect the development of geothermal resources. The data indicate that water availability is fairly limited, especially under drought conditions, in most of the areas with significant near- and medium-term geothermal potential. Southern California was found to have the greatest potential for water-related challenges with its combination of high geothermal potential and limited water availability. The results of this work are summarized in Chapter 6. Overall, this work highlights the importance of utilizing dry cooling systems for binary and EGS systems and minimizing fresh water consumption throughout the life cycle of geothermal power development. The large resource base for EGSs represents a major opportunity for the geothermal industry; however, depending upon geology, these systems can require large quantities of makeup water due to belowground reservoir losses. Identifying potential sources of compatible degraded or low-quality water for use for makeup injection for EGS and flash systems represents an important opportunity to reduce the impacts of geothermal development on fresh water resources. The importance of identifying alternative water sources for geothermal systems is heightened by the fact that a large fraction of the geothermal resource is located in areas already experiencing water stress. Chapter 7 is a glossary of the technical terms used in the report, and Chapters 8 and 9 provide references and a bibliography, respectively.

  5. Laboratory and Field Experimental Studies of CO2 as Heat Transmission Fluid in Enhanced Geothermal Systems (EGS)

    Broader source: Energy.gov [DOE]

    Project objectives: obtain basic information on the performance of CO2-based EGS; and enhance and calibrate modeling capabilities for such systems.

  6. Habanero EGS Geothermal Facility | Open Energy Information

    Open Energy Info (EERE)

    Austrailia Plant Information Facility Type EGS Owner Geodynamics Developer Geodynamics Energy Purchaser Siemens Commercial Online Date 2013 Power Plant Data Type of Plant Number...

  7. Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS Gigawatts of Geothermal: JASON Study Highlights Huge Potential for EGS February 21, 2014 - 3:46pm Addthis JASON study members take in the landscape at Sugarloaf, an 86,000-year-old rhyolite dome in eastern California, and among the youngest dated volcanoes in the field. Andy Sabin (right), director of the Navy Geothermal Program Office, led the field trip to the Coso geothermal field, where the Navy

  8. User's guide of TOUGH2-EGS-MP: A Massively Parallel Simulator with Coupled Geomechanics for Fluid and Heat Flow in Enhanced Geothermal Systems VERSION 1.0

    SciTech Connect (OSTI)

    Xiong, Yi; Fakcharoenphol, Perapon; Wang, Shihao; Winterfeld, Philip H.; Zhang, Keni; Wu, Yu-Shu

    2013-12-01

    TOUGH2-EGS-MP is a parallel numerical simulation program coupling geomechanics with fluid and heat flow in fractured and porous media, and is applicable for simulation of enhanced geothermal systems (EGS). TOUGH2-EGS-MP is based on the TOUGH2-MP code, the massively parallel version of TOUGH2. In TOUGH2-EGS-MP, the fully-coupled flow-geomechanics model is developed from linear elastic theory for thermo-poro-elastic systems and is formulated in terms of mean normal stress as well as pore pressure and temperature. Reservoir rock properties such as porosity and permeability depend on rock deformation, and the relationships between these two, obtained from poro-elasticity theories and empirical correlations, are incorporated into the simulation. This report provides the user with detailed information on the TOUGH2-EGS-MP mathematical model and instructions for using it for Thermal-Hydrological-Mechanical (THM) simulations. The mathematical model includes the fluid and heat flow equations, geomechanical equation, and discretization of those equations. In addition, the parallel aspects of the code, such as domain partitioning and communication between processors, are also included. Although TOUGH2-EGS-MP has the capability for simulating fluid and heat flows coupled with geomechanical effects, it is up to the user to select the specific coupling process, such as THM or only TH, in a simulation. There are several example problems illustrating applications of this program. These example problems are described in detail and their input data are presented. Their results demonstrate that this program can be used for field-scale geothermal reservoir simulation in porous and fractured media with fluid and heat flow coupled with geomechanical effects.

  9. Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code

    Office of Scientific and Technical Information (OSTI)

    Comparison Study (Conference) | SciTech Connect Conference: Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code Comparison Study Citation Details In-Document Search Title: Flow and Thermal Behavior of an EGS Reservoir - Geothermal Code Comparison Study Authors: Kelkar, Sharad M. [1] ; Mclure, Mark [2] ; Ghassemi, Ahmad [3] + Show Author Affiliations Los Alamos National Laboratory University of Texas Austin University of Oklahoma Publication Date: 2015-01-26 OSTI Identifier:

  10. Feasibility of EGS Well Control Systems

    SciTech Connect (OSTI)

    Norann, Randy A; Darlow, Richard

    2015-02-03

    This report covers the 8th major objective listed in Grant DE-FG36-08GO18185. This objective takes the information and experience gained from the development of 300°C well monitoring system and applies them to concepts envisioned for future geothermal well control systems supporting EGS power production. This report covers a large number of instrumentation and control system engineering issues for EGS wells while also providing a window into existing technology to address those issues.

  11. Well Monitoring Systems for EGS

    Broader source: Energy.gov [DOE]

    Well Monitoring Systems for EGS presentation at the April 2013 peer review meeting held in Denver, Colorado.

  12. User's Guide of TOUGH2-EGS. A Coupled Geomechanical and Reactive Geochemical Simulator for Fluid and Heat Flow in Enhanced Geothermal Systems Version 1.0

    SciTech Connect (OSTI)

    Fakcharoenphol, Perapon; Xiong, Yi; Hu, Litang; Winterfeld, Philip H.; Xu, Tianfu; Wu, Yu-Shu

    2013-05-01

    TOUGH2-EGS is a numerical simulation program coupling geomechanics and chemical reactions for fluid and heat flows in porous media and fractured reservoirs of enhanced geothermal systems. The simulator includes the fully-coupled geomechanical (THM) module, the fully-coupled geochemical (THC) module, and the sequentially coupled reactive geochemistry (THMC) module. The fully-coupled flow-geomechanics model is developed from the linear elastic theory for the thermo-poro-elastic system and is formulated with the mean normal stress as well as pore pressure and temperature. The chemical reaction is sequentially coupled after solution of flow equations, which provides the flow velocity and phase saturation for the solute transport calculation at each time step. In addition, reservoir rock properties, such as porosity and permeability, are subjected to change due to rock deformation and chemical reactions. The relationships between rock properties and geomechanical and chemical effects from poro-elasticity theories and empirical correlations are incorporated into the simulator. This report provides the user with detailed information on both mathematical models and instructions for using TOUGH2-EGS for THM, THC or THMC simulations. The mathematical models include the fluid and heat flow equations, geomechanical equation, reactive geochemistry equations, and discretization methods. Although TOUGH2-EGS has the capability for simulating fluid and heat flows coupled with both geomechanical and chemical effects, it is up to the users to select the specific coupling process, such as THM, THC, or THMC in a simulation. There are several example problems illustrating the applications of this program. These example problems are described in details and their input data are presented. The results demonstrate that this program can be used for field-scale geothermal reservoir simulation with fluid and heat flow, geomechanical effect, and chemical reaction in porous and fractured media.

  13. Life Cycle Water Consumption and Water Resource Assessment for Utility-Scale Geothermal Systems: An In-Depth Analysis of Historical and Forthcoming EGS Projects

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    2013-08-31

    This report is the third in a series of reports sponsored by the U.S. Department of Energy Geothermal Technologies Program in which a range of water-related issues surrounding geothermal power production are evaluated. The first report made an initial attempt at quantifying the life cycle fresh water requirements of geothermal power-generating systems and explored operational and environmental concerns related to the geochemical composition of geothermal fluids. The initial analysis of life cycle fresh water consumption of geothermal power-generating systems identified that operational water requirements consumed the vast majority of water across the life cycle. However, it relied upon limited operational water consumption data and did not account for belowground operational losses for enhanced geothermal systems (EGSs). A second report presented an initial assessment of fresh water demand for future growth in utility-scale geothermal power generation. The current analysis builds upon this work to improve life cycle fresh water consumption estimates and incorporates regional water availability into the resource assessment to improve the identification of areas where future growth in geothermal electricity generation may encounter water challenges.

  14. Life Cycle Water Consumption and Water Resource Assessment for Utility-Scale Geothermal Systems: An In-Depth Analysis of Historical and Forthcoming EGS Projects

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    This report is the third in a series of reports sponsored by the U.S. Department of Energy Geothermal Technologies Program in which a range of water-related issues surrounding geothermal power production are evaluated. The first report made an initial attempt at quantifying the life cycle fresh water requirements of geothermal power-generating systems and explored operational and environmental concerns related to the geochemical composition of geothermal fluids. The initial analysis of life cycle fresh water consumption of geothermal power-generating systems identified that operational water requirements consumed the vast majority of water across the life cycle. However, it relied upon limited operational water consumption data and did not account for belowground operational losses for enhanced geothermal systems (EGSs). A second report presented an initial assessment of fresh water demand for future growth in utility-scale geothermal power generation. The current analysis builds upon this work to improve life cycle fresh water consumption estimates and incorporates regional water availability into the resource assessment to improve the identification of areas where future growth in geothermal electricity generation may encounter water challenges.

  15. EGS Infographic | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California Enhanced Geothermal System (EGS) Infographic FORGE Infographic Geothermal Energy: A Geothermal Teacher ...

  16. Geothermal Technologies Program: Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Not Available

    2004-08-01

    This general publication describes enhanced geothermal systems (EGS) and the principles of operation. It also describes the DOE program R&D efforts in this area, and summarizes several projects using EGS technology.

  17. Oregon: DOE Advances Game-Changing EGS Geothermal Technology...

    Energy Savers [EERE]

    demonstration project, at Newberry Volcano near Bend, Oregon, represents a key step in geothermal energy development, demonstrating that an engineered geothermal reservoir can...

  18. Enhanced Geothermal Systems Roadmap Workshops | Department of...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Roadmap Workshops Enhanced Geothermal Systems Roadmap Workshops June 21, 2011 - 2:50pm Addthis Enhanced Geothermal Systems (EGS) are engineered or enhanced reservoirs created to...

  19. EERE Success Story-Oregon: DOE Advances Game-Changing EGS Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Oregon: DOE Advances Game-Changing EGS Geothermal Technology at the Newberry Volcano EERE Success Story-Oregon: DOE Advances Game-Changing EGS Geothermal Technology at the Newberry ...

  20. Advanced Drilling Systems for EGS

    Broader source: Energy.gov [DOE]

    Project objectives: Apply Novateks Stinger® and JackBit® technology in the development of an innovative; durable fixed bladed bit and improved roller cone bit that will increase ROP by three times in drilling hard rock formations normally encountered in developing EGS resources.

  1. CASCADED USES OF GEOTHERMAL ENERGY Paul Brophy EGS, Inc. & GRC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    - Increased net efficiency - Improved economics * Thermodynamics of geothermal plants - ... power plants improve: - Efficiency and economics of the project * Cascading from the ...

  2. Enhanced Geothermal Systems | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    About the Geothermal Technologies Office » Enhanced Geothermal Systems Enhanced Geothermal Systems EGS R&D Projects EGS R&D Projects The AltaRock Energy EGS demonstration project at Newberry Volcano, Oregon, leverages DOE funds to demonstrate engineered geothermal systems in a green field setting. Image Source: Elisabet Metcalfe Read more EGS Program Highlight EGS Program Highlight Armed with a wealth of data and new data analysis and integration techniques, images of the subsurface

  3. Funding Opportunity: Geothermal Technologies Program Seeks Technologies to Reduce Levelized Cost of Electricity for Hydrothermal Development and EGS

    Broader source: Energy.gov [DOE]

    The Geothermal Technologies Program seeks non-prime mover technologies that have the potential to contribute to reducing the levelized cost of electricity from new hydrothermal development to 6¢/ kWh by 2020 and Enhanced Geothermal Systems (EGS) to 6¢/ kWh by 2030.

  4. EGS Projects

    Broader source: Energy.gov [DOE]

    EGS projects span research, development, and demonstration. Unlike traditional hydrothermal systems, EGS capture heat from areas that traditional geothermal energy cannot—where fluid and/or...

  5. Enhanced Geothermal System Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal » Enhanced Geothermal System Basics Enhanced Geothermal System Basics A naturally occurring geothermal system, known as Enhanced Geothermal Systems (EGS), is another form of renewable energy. It is defined by three key elements: heat, fluid, and permeability at depth. Essentially, these are engineered reservoirs that produce energy from geothermal resources in areas that are not usually considered economically viable due to a lack of water and/or the ability of that water to pass

  6. Geothermal Data Systems

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) Geothermal Technologies Office (GTO) has designed and tested a comprehensive, federated information system that will make geothermal data widely available. This new National Geothermal Data System (NGDS) will provide access to all types of geothermal data to enable geothermal analysis and widespread public use, thereby reducing the risk of geothermal energy development.

  7. Enhanced Geothermal Systems Demonstration Projects | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    About the Geothermal Technologies Office » Enhanced Geothermal Systems » Enhanced Geothermal Systems Demonstration Projects Enhanced Geothermal Systems Demonstration Projects A significant long-term opportunity for widespread power production from new geothermal sources lies in Enhanced Geothermal Systems (EGS), where innovative technology development and deployment could facilitate access to 100+ GW of energy, exponentially more than today's current geothermal capacity. With EGS, we can tap

  8. How an Enhanced Geothermal System Works | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    an Enhanced Geothermal System Works How an Enhanced Geothermal System Works The Potential Enhanced Geothermal Systems (EGS), also sometimes called engineered geothermal systems, offer great potential for dramatically expanding the use of geothermal energy. Present geothermal power generation comes from hydrothermal reservoirs, and is somewhat limited in geographic application to specific ideal places in the western U.S. This represents the 'low-hanging fruit' of geothermal energy potential. EGS

  9. Enhanced Geothermal Systems Webinar | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Enhanced Geothermal Systems Webinar Enhanced Geothermal Systems Webinar The following presentations are from a Webinar conducted on July 15, 2009, that was hosted by the Geothermal Resources Council (GRC) and sponsored by the American Public Power Association, National Rural Electric Cooperative Associate, Western Area Power Administration, and U.S. Department of Energy Geothermal Technologies Office. The Webinar covered topics including federal enhanced geothermal systems (EGS) activities and

  10. An Evaluation of Enhanced Geothermal Systems Technology

    SciTech Connect (OSTI)

    Jelacic, Allan; Fortuna, Raymond; LaSala, Raymond; Nathwani, Jay; Nix, Gerald; Visser, Charles; Green, Bruce; Renner, Joel; Blankenship, Douglas; Kennedy, Mack; Bruton, Carol

    2008-04-01

    This 2008 document presents the results of an eight-month study by the Department of Energy (DOE) and its support staff at the national laboratories concerning the technological requirements to commercialize a new geothermal technology, Enhanced Geothermal Systems (EGS).

  11. DOE and Partners Test Enhanced Geothermal Systems Technologies

    Broader source: Energy.gov [DOE]

    DOE has embarked on a project with a number of partners to test Enhanced Geothermal Systems (EGS) technologies at a commercial geothermal power facility near Reno, Nevada.

  12. Enhanced Geothermal Systems Subprogram Overview | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Enhanced Geothermal System (EGS) Fact Sheet Enhanced Geothermal Systems (EGS) are engineered reservoirs created to produce energy from geothermal resources that are otherwise not economical due to lack of water and/or permeability. EGS technology has the potential for accessing the earth's vast resources of heat located at depth to help meet the energy needs of the United States. Learn more about EGS from the Enhanced Geothermal Systems Fact Sheet below. PDF icon Enhanced Geothermal Systems Fact

  13. Technology Development and Field Trials of EGS Drilling Systems

    Broader source: Energy.gov [DOE]

    Project objective: Development of drilling systems based upon rock penetration technologies not commonly employed in the geothermal industry.

  14. Enhanced Geothermal Systems Technologies

    Broader source: Energy.gov [DOE]

    Geothermal Energy an​d the Enhanced Geothermal Systems Concept The Navy 1 geothermal power plant near Coso Hot Springs, California, is applying EGS technology. Heat is naturally present everywhere in the earth. For all intents and purposes, heat from the earth is inexhaustible. Water is not nearly as ubiquitous in the earth as heat. Most aqueous fluids are derived from surface waters that have percolated into the earth along permeable pathways such as faults. Permeability is a measure of the ease of fluid flow through rock. The permeability of rock results from pores, fractures, joints, faults, and other openings which allow fluids to move. High permeability implies that fluids can flow rapidly through the rock. Permeability and, subsequently, the amount of fluids tend to decrease with depth as openings in the rocks compress from the weight of the overburden.

  15. Enhanced Geothermal Systems | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    The AltaRock Energy EGS demonstration project at Newberry Volcano, Oregon, leverages DOE funds to demonstrate engineered geothermal systems in a green field setting. Source:...

  16. EGS Data Library | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Sheets EGS Fact Sheet EGS Infographic FORGE Informational Flier Reports A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems Geothermal Energy...

  17. Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Below are the project presentations and respective peer review results for Engineered Geothermal Systems, Low Temperature and Exploration Demonstration Projects.

  18. Energy Returned On Investment of Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objective: Determine the Energy Returned on Investment (EROI) for electric power production of Engineered Geothermal Systems (EGS).

  19. Recovery act. Characterizing structural controls of EGS-candidate and conventional geothermal reservoirs in the Great Basin. Developing successful exploration strategies in extended terranes

    SciTech Connect (OSTI)

    Faulds, James

    2015-06-25

    We conducted a comprehensive analysis of the structural controls of geothermal systems within the Great Basin and adjacent regions. Our main objectives were to: 1) Produce a catalogue of favorable structural environments and models for geothermal systems. 2) Improve site-specific targeting of geothermal resources through detailed studies of representative sites, which included innovative techniques of slip tendency analysis of faults and 3D modeling. 3) Compare and contrast the structural controls and models in different tectonic settings. 4) Synthesize data and develop methodologies for enhancement of exploration strategies for conventional and EGS systems, reduction in the risk of drilling non-productive wells, and selecting the best EGS sites.

  20. Blind Geothermal System | Open Energy Information

    Open Energy Info (EERE)

    Blind Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Blind Geothermal System Dictionary.png Blind Geothermal System: An area with a...

  1. Technology Development and Field Trials of EGS Drilling Systems...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Technology Development and Field Trials of EGS Drilling Systems Technology Development and Field Trials of EGS Drilling Systems Technology Development and Field Trials of EGS ...

  2. EGS Success Stories | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    February 20, 2008 DOE and Partners Test Enhanced Geothermal Systems Technologies DOE has embarked on a project with a number of partners to test Enhanced Geothermal Systems (EGS)...

  3. Demonstration of an Enhanced Geothermal System at the Northwest Geysers

    Broader source: Energy.gov (indexed) [DOE]

    Geothermal Resources | Department of Energy Project objectives: Demonstrate a 1 megawatt Variable Phase Turbine and Variable Phase Cycle with low temperature brine. PDF icon low_hays_variable_phase_turbine.pdf More Documents & Publications track 1: Low Temp | geothermal 2015 peer review track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review Optimization of hybrid-water/air-cooled condenser in an enhanced turbine geothermal ORC system Geothermal Field, California |

  4. National Geothermal Data System (NGDS) Geothermal Data Domain...

    Open Energy Info (EERE)

    Geothermal Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

  5. Enhanced Geothermal Systems | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Enhanced Geothermal Systems Enhanced Geothermal Systems EGS-2-pager8-1 1.17.28 PM.jpg Steps to Develop Power Production at an EGS Site Step 1: Identify/Characterize a Site Develop a geologic model of a potential site via surface, geologic, geophysical, and remote sensing exploration. Assess the temperature gradient, permeability, in-situ stress directions of the resource, rock mechanical properties, and whether fluid is present. Determine if the necessary characteristics to create an EGS

  6. Modeling of geothermal systems

    SciTech Connect (OSTI)

    Bodvarsson, G.S.; Pruess, K.; Lippmann, M.J.

    1985-03-01

    During the last decade the use of numerical modeling for geothermal resource evaluation has grown significantly, and new modeling approaches have been developed. In this paper we present a summary of the present status in numerical modeling of geothermal systems, emphasizing recent developments. Different modeling approaches are described and their applicability discussed. The various modeling tasks, including natural-state, exploitation, injection, multi-component and subsidence modeling, are illustrated with geothermal field examples. 99 refs., 14 figs.

  7. High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objective: Advance the technology for well fluids lifting systems to meet the foreseeable pressure; temperature; and longevity needs of the Enhanced Geothermal Systems (EGS) industry.

  8. Neutron imaging for geothermal energy systems

    SciTech Connect (OSTI)

    Bingham, Philip R; Anovitz, Lawrence {Larry} M; Polsky, Yarom

    2013-01-01

    Geothermal systems extract heat energy from the interior of the earth using a working fluid, typically water. Three components are required for a commercially viable geothermal system: heat, fluid, and permeability. Current commercial electricity production using geothermal energy occurs where the three main components exist naturally. These are called hydrothermal systems. In the US, there is an estimated 30 GW of base load electrical power potential for hydrothermal sites. Next generation geothermal systems, named Enhanced Geothermal Systems (EGS), have an estimated potential of 4500 GW. EGSs lack in-situ fluid, permeability or both. As such, the heat exchange system must be developed or engineered within the rock. The envisioned method for producing permeability in the EGS reservoir is hydraulic fracturing, which is rarely practiced in the geothermal industry, and not well understood for the rocks typically present in geothermal reservoirs. High costs associated with trial and error learning in the field have led to an effort to characterize fluid flow and fracturing mechanisms in the laboratory to better understand how to design and manage EGS reservoirs. Neutron radiography has been investigated for potential use in this characterization. An environmental chamber has been developed that is suitable for reproduction of EGS pressures and temperatures and has been tested for both flow and precipitations studies with success for air/liquid interface imaging and 3D reconstruction of precipitation within the core.

  9. National Geothermal Data System (NGDS) Initiative | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Data System (NGDS) Initiative National Geothermal Data System (NGDS) Initiative Geothermal energy in the subsurface is better understood through data visualization, as ...

  10. Experience with the Development of Advanced Materials for Geothermal Systems

    SciTech Connect (OSTI)

    Sugama, T.; Butcher, T.; Ecker, L.

    2011-01-01

    This chapter contains the following sections: Introduction, Advanced Cements, Materials Research and Development in Enhanced Geothermal Systems (EGS), Advanced Coatings, and Conclusions.

  11. Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Jeanloz, R.; Stone, H.

    2013-12-31

    DOE, through the Geothermal Technologies Office (GTO) within the Office of Energy Efficiency and Renewable Energy, requested this study, identifying a focus on: i) assessment of technologies and approaches for subsurface imaging and characterization so as to be able to validate EGS opportunities, and ii) assessment of approaches toward creating sites for EGS, including science and engineering to enhance permeability and increase the recovery factor. Two days of briefings provided in-depth discussion of a wide range of themes and challenges in EGS, and represented perspectives from industry, government laboratories and university researchers. JASON also contacted colleagues from universities, government labs and industry in further conversations to learn the state of the field and potential technologies relevant to EGS.

  12. National Geothermal Data System - DOE Geothermal Data Repository...

    Broader source: Energy.gov (indexed) [DOE]

    National Geothermal Data System (NGDS) and DOE's node on the NGDS. ngdsgdrgeneralpresentation.pdf More Documents & Publications How to Utilize the National Geothermal Data...

  13. Technology Development and Field Trials of EGS Drilling Systems

    Broader source: Energy.gov [DOE]

    Technology Development and Field Trials of EGS Drilling Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  14. Geographic Information System At International Geothermal Area...

    Open Energy Info (EERE)

    search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At International Geothermal Area, Indonesia (Nash, Et Al., 2002) Exploration Activity...

  15. Full Reviews: Enhanced Geothermal Systems | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Enhanced Geothermal Systems. Bradys EGS Project Zvi Krieger, Ormat Nevada Inc. Project Presentation | Peer Reviewer Comments Concept Testing and Development at the Raft River Geothermal Field, Idaho Joseph Moore, University of Utah Project Presentation | Peer Reviewer Comments Desert Peak EGS Project Ezra Zemach, Ormat Nevada Inc. Project Presentation | Peer Reviewer Comments Creation of an Engineered Geothermal System through Hydraulic and Thermal Stimulation Peter Rose, University of Utah

  16. OIT geothermal system improvements

    SciTech Connect (OSTI)

    Lienau, P.J.

    1996-08-01

    Three geothermal wells drilled during the original campus construction vary from 396 m (1,300 ft) to 550 m (1,800 ft). These wells supply all of the heating and part of the cooling needs of the 11-building, 62,200 m{sup 2} (670,000 ft{sup 2}) campus. The combined capacity of the well pumps is 62 L/s(980 gpm) of 89{degrees}C (192{degrees}F) geothermal fluids. Swimming pool and domestic hot water heating impose a small but nearly constant year-round flow requirement. In addition to heating, a portion of the campus is also cooled using the geothermal resource. This is accomplished through the use of an absorption chiller. The chiller, which operates on the same principle as a gas refrigerator, requires a flow of 38 L/s (600 gpm) of geothermal fluid and produces 541 kW (154 tons) of cooling capacity (Rafferty, 1989). The annual operating costs for the system is about $35,000 including maintenance salary, equipment replacement and cost of pumping. This amounts to about $0.05 per square foot per year.

  17. Seismic monitoring of EGS tests at the Coso Geothermal area, California, using accurate MEQ locations and full moment tensors

    SciTech Connect (OSTI)

    Foulger, G.R.; B.R. Julian, B.R.; F. Monastero

    2008-04-01

    We studied high-resolution relative locations and full moment tensors of microearthquakes (MEQs) occurring before, during and following Enhanced Geothermal Systems (EGS) experiments in two wells at the Coso geothermal area, California. The objective was to map new fractures, determine the mode and sense of failure, and characterize the stress cycle associated with injection. New software developed for this work combines waveform crosscorrelation measurement of arrival times with relative relocation methods, and assesses confidence regions for moment tensors derived using linearprogramming methods. For moment tensor determination we also developed a convenient Graphical User Interface (GUI), to streamline the work. We used data from the U.S. Navy’s permanent network of three-component digital borehole seismometers and from 14 portable three-component digital instruments. The latter supplemented the permanent network during injection experiments in well 34A-9 in 2004 and well 34-9RD2 in 2005. In the experiment in well 34A-9, the co-injection earthquakes were more numerous, smaller, more explosive and had more horizontal motion, compared with the pre-injection earthquakes. In the experiment in well 34-9RD2 the relocated hypocenters reveal a well-defined planar structure, 700 m long and 600 m high in the depth range 0.8 to 1.4 km below sea level, striking N 20° E and dipping at 75° to the WNW. The moment tensors show that it corresponds to a mode I (opening) crack. For both wells, the perturbed stress state near the bottom of the well persisted for at least two months following the injection.

  18. Tonopah Test Range EGS graphics tracking display system: HP370

    SciTech Connect (OSTI)

    Meyer, R.H.; Bauhs, K.C.

    1994-08-01

    This report describes the HP370 component of the Enhanced Graphics System (EGS) used at Tonopah Test Range (TTR). Selected Radar data is fed into the computer systems and the resulting tracking symbols are displayed on high-resolution video monitors in real time. These tracking symbols overlay background maps and are used for monitoring/controlling various flight vehicles. This report discusses both the operational aspects and the internal configuration of the HP370 Workstation portion of the EGS system.

  19. EGS Energy | Open Energy Information

    Open Energy Info (EERE)

    EGS Energy is a UK based company seeking to develop Enhanced Geothermal Systems (EGS) for electricity generation in Cornwall UK. The company is led by Roy Baria, who has experience...

  20. Newberry EGS Demonstration | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Newberry EGS Demonstration Newberry EGS Demonstration Newberry EGS Demonstration presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon newberry_demo_peer2013.pdf More Documents & Publications track 4: enhanced geothermal systems (EGS) | geothermal 2015 peer review Coupled Thermal-Hydrological-Mechanical-Chemical Model And Experiments For Optimization Of Enhanced Geothermal System Development And Production: Evaluation of Stimulation at the Newberry Volcano EGS

  1. National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a DOE-funded distributed network of databases and data sites. Much of the risk of geothermal energy development is associated with exploring for, confirming and characterizing the available geothermal resources. The overriding purpose of the NGDS is to help mitigate this up-front risk by serving as a central gateway for geothermal and relevant related data as well as a link to distributed data sources. Assessing and categorizing the nation's geothermal resources and consolidating all geothermal data through a publicly accessible data system will support research, stimulate public interest, promote market acceptance and investment, and, in turn, the growth of the geothermal industry. Major participants in the NGDS to date include universities, laboratories, the Arizona Geological Survey and Association of American State Geologists (Arizona Geological Survey, lead), the Geothermal Resources Council, and the U.S. Geological Survey. The Geothermal Energy Association is collaborating with the NGDS to insure that it meets the needs of the geothermal industry.

  2. A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Ziagos, John; Phillips, Benjamin R.; Boyd, Lauren; Jelacic, Allan; Stillman, Greg; Hass, Eric

    2013-02-13

    Realization of EGS development would make geothermal a significant contender in the renewable energy portfolio, on the order of 100+ GWe in the United States alone. While up to 90% of the geothermal power resource in the United States is thought to reside in Enhanced Geothermal Systems (EGS), hurdles to commercial development still remain. The Geothermal Technologies Office, U.S. Department of Energy (DOE), began in 2011 to outline opportunities for advancing EGS technologies on five- to 20-year timescales, with community input on the underlying technology needs that will guide research and ultimately determine commercial success for EGS. This report traces DOE's research investments, past and present, and ties them to these technology needs, forming the basis for an EGS Technology Roadmap to help guide future DOE research. This roadmap is currently open for public comment. Send your comments to geothermal@ee.doe.gov.

  3. Induced seismicity associated with enhanced geothermal system

    SciTech Connect (OSTI)

    Majer, Ernest; Majer, Ernest L.; Baria, Roy; Stark, Mitch; Oates, Stephen; Bommer, Julian; Smith, Bill; Asanuma, Hiroshi

    2006-09-26

    Enhanced Geothermal Systems (EGS) offer the potential to significantly add to the world energy inventory. As with any development of new technology, some aspects of the technology has been accepted by the general public, but some have not yet been accepted and await further clarification before such acceptance is possible. One of the issues associated with EGS is the role of microseismicity during the creation of the underground reservoir and the subsequent extraction of the energy. The primary objectives of this white paper are to present an up-to-date review of the state of knowledge about induced seismicity during the creation and operation of enhanced geothermal systems, and to point out the gaps in knowledge that if addressed will allow an improved understanding of the mechanisms generating the events as well as serve as a basis to develop successful protocols for monitoring and addressing community issues associated with such induced seismicity. The information was collected though literature searches as well as convening three workshops to gather information from a wide audience. Although microseismicity has been associated with the development of production and injection operations in a variety of geothermal regions, there have been no or few adverse physical effects on the operations or on surrounding communities. Still, there is public concern over the possible amount and magnitude of the seismicity associated with current and future EGS operations. It is pointed out that microseismicity has been successfully dealt with in a variety of non-geothermal as well as geothermal environments. Several case histories are also presented to illustrate a variety of technical and public acceptance issues. It is concluded that EGS Induced seismicity need not pose any threat to the development of geothermal resources if community issues are properly handled. In fact, induced seismicity provides benefits because it can be used as a monitoring tool to understand the effectiveness of the EGS operations and shed light on the mechanics of the reservoir.

  4. American Geothermal Systems | Open Energy Information

    Open Energy Info (EERE)

    Systems Place: Austin, Texas Sector: Geothermal energy Product: Installer of geothermal heating and cooling technologies, also has a patented water to air heat pump system....

  5. National Geothermal Data System - DOE Geothermal Data Repository...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" Guidelines for Provision and Interchange of Geothermal ...

  6. Integrated Chemical Geothermometry System for Geothermal Exploration

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Develop practical and reliable system to predict geothermal reservoir temperatures from integrated chemical analyses of spring and well fluids.

  7. Microearthquake Technology for EGS Fracture Characterization...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Engineered Geothermal System through Hydraulic and Thermal Stimulation Integration of Noise and Coda Correlation Data into Kinematic and Waveform Inversions Newberry EGS...

  8. Engineered Geothermal Systems Energy Return On Energy Investment

    Office of Scientific and Technical Information (OSTI)

    EGS EROI - 1 Engineered Geothermal Systems Energy Return On Energy Investment A.J. Mansure, Geothermal Consultant, ajm@q.com Albuquerque, NM 12/10/2012 Key Words: energy, EROI, EGS, efficiency, energy investment, energy return, input energy, energy payback, and net energy. Abstract Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. Too often comparisons of energy systems use "efficiency" when EROI would be more

  9. Monitoring and Modeling Fluid Flow in a Developing Enhanced Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Enhanced Geothermal System (EGS) Reservoir; 2010 Geothermal Technology Program Peer Review Report Monitoring and Modeling Fluid Flow in a Developing Enhanced Geothermal System ...

  10. Monitoring EGS Stimulation and Reservoir Dynamics with InSAR...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EGS Stimulation and Reservoir Dynamics with InSAR and MEQ Monitoring EGS Stimulation and ... and Productivity in Enhanced Geothermal Systems GBCGE Resarch, Education and Outreach ...

  11. Newberry Volcano EGS Demonstration

    Broader source: Energy.gov [DOE]

    Engineered Geothermal Systems, Low Temp, Exploration Demonstration Projects. Project objective: To demonstrate the development and operation of an Engineered Geothermal System.

  12. Development of a Hydrothermal Spallation Drilling System for EGS

    Broader source: Energy.gov [DOE]

    Project objective: Build and demonstrate a working prototype hydrothermal spallation drilling unit that will accelerate commercial deployment of EGS as a domestic energy resource.

  13. Category:Geothermal Technologies | Open Energy Information

    Open Energy Info (EERE)

    out of 7 total. C Co-Produced Geothermal Systems E Enhanced Geothermal Systems (EGS) G Geothermal Direct Use G cont. GeothermalExploration Ground Source Heat Pumps H...

  14. Demonstration of an Enhanced Geothermal System at the Northwest...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    California; 2010 Geothermal Technology Program Peer Review Report Demonstration of an Enhanced Geothermal System at the Northwest Geysers Geothermal Field, California; 2010...

  15. Geographic Information Systems- Tools For Geotherm Exploration...

    Open Energy Info (EERE)

    Information Systems- Tools For Geotherm Exploration, Tracers Data Analysis, And Enhanced Data Distribution, Visualization, And Management Abstract Geographic information...

  16. Microearthquake Technology for EGS Fracture Characterization | Department

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of Energy Microearthquake Technology for EGS Fracture Characterization Microearthquake Technology for EGS Fracture Characterization Project objectives: To understand how EGS fracture networks develop; To develop technology to determine accurate absolute three-dimensional positions of EGS fracture networks. PDF icon seismic_foulger_microearthquake.pdf More Documents & Publications Creation of an Engineered Geothermal System through Hydraulic and Thermal Stimulation Newberry EGS

  17. Numerical Modeling Of Basin And Range Geothermal Systems | Open...

    Open Energy Info (EERE)

    for extensional geothermal systems that include structure, heat input, and permeability distribution have been established using numerical models. Extensional geothermal...

  18. Geographic Information System At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At Lightning Dock Geothermal Area (Getman, 2014) Exploration Activity...

  19. Boise geothermal district heating system

    SciTech Connect (OSTI)

    Hanson, P.J.

    1985-10-01

    This document describes the Boise geothermal district heating project from preliminary feasibility studies completed in 1979 to a fully operational system by 1983. The report includes information about the two local governments that participated in the project - the City of Boise, Idaho and the Boise Warm Springs Water District. It also discusses the federal funding sources; the financial studies; the feasibility studies conducted; the general system planning and design; design of detailed system components; the legal issues involved in production; geological analysis of the resource area; distribution and disposal; the program to market system services; and the methods of retrofitting buildings to use geothermal hot water for space heating. Technically this report describes the Boise City district heating system based on 170/sup 0/F water, a 4000 gpm production system, a 41,000 foot pipeline system, and system economies. Comparable data are also provided for the Boise Warm Springs Water District. 62 figs., 31 tabs.

  20. National Geothermal Data System Architecture Design, Testing...

    Broader source: Energy.gov (indexed) [DOE]

    To create the National Geothermal Data System (NGDS) comprised of a core and distributed network of databases and data sites that will comprise a federated system for acquisition,...

  1. Conceptual Models of Geothermal Systems - Introduction | Open...

    Open Energy Info (EERE)

    of any type of geothermal system is a clear definition and understanding of the nature and characteristics of the system in question. This is best achieved through the...

  2. Geothermal Data from the National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a distributed data system providing access to information resources related to geothermal energy from a network of data providers. Data are contributed by academic researchers, private industry, and state and federal agencies. Built on a scalable and open platform through the U.S. Geoscience Information Network (USGIN), NGDS respects data provenance while promoting shared resources.Since NGDS is built using a set of open protocols and standards, relying on the Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO), members of the community may access the data in a variety of proprietary and open-source applications and software. In addition, developers can add functionality to the system by creating new applications based on the open protocols and standards of the NGDS. The NGDS, supported by the U.S. Department of Energys Geothermal Technology Program, is intended to provide access to all types of geothermal data to enable geothermal analysis and widespread public use in an effort to reduce the risk of geothermal energy development [copied from http://www.geothermaldata.org/page/about]. See the long list of data contributors at http://geothermaldata.org/page/data-types-and-contributors#data-contributors.

  3. Geothermal Data from the National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a distributed data system providing access to information resources related to geothermal energy from a network of data providers. Data are contributed by academic researchers, private industry, and state and federal agencies. Built on a scalable and open platform through the U.S. Geoscience Information Network (USGIN), NGDS respects data provenance while promoting shared resources.Since NGDS is built using a set of open protocols and standards, relying on the Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO), members of the community may access the data in a variety of proprietary and open-source applications and software. In addition, developers can add functionality to the system by creating new applications based on the open protocols and standards of the NGDS. The NGDS, supported by the U.S. Department of Energy’s Geothermal Technology Program, is intended to provide access to all types of geothermal data to enable geothermal analysis and widespread public use in an effort to reduce the risk of geothermal energy development [copied from http://www.geothermaldata.org/page/about]. See the long list of data contributors at http://geothermaldata.org/page/data-types-and-contributors#data-contributors.

  4. NATIONAL GEOTHERMAL DATA SYSTEM (NGDS) GEOTHERMAL DATA DOMAIN: ASSESSMENT OF GEOTHERMAL COMMUNITY DATA NEEDS

    SciTech Connect (OSTI)

    Anderson, Arlene; Blackwell, David; Chickering, Cathy; Boyd, Toni; Horne, Roland; MacKenzie, Matthew; Moore, Joseph; Nickull, Duane; Richard, Stephen; Shevenell, Lisa A.

    2013-01-01

    To satisfy the critical need for geothermal data to ad- vance geothermal energy as a viable renewable ener- gy contender, the U.S. Department of Energy is in- vesting in the development of the National Geother- mal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to sup- ply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are dis- cussed. In particular, this paper addresses the various types of data required to effectively assess geother- mal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS in- cludes a work plan that addresses data assets and re- sources of interest to users, a survey of data provid- ers, data content models, and how data will be ex- changed and promoted, as well as lessons learned within the geothermal community.

  5. Estimating Well Costs for Enhanced Geothermal System Applications

    SciTech Connect (OSTI)

    K. K. Bloomfield; P. T. Laney

    2005-08-01

    The objective of the work reported was to investigate the costs of drilling and completing wells and to relate those costs to the economic viability of enhanced geothermal systems (EGS). This is part of a larger parametric study of major cost components in an EGS. The possibility of improving the economics of EGS can be determined by analyzing the major cost components of the system, which include well drilling and completion. Determining what costs in developing an EGS are most sensitive will determine the areas of research to reduce those costs. The results of the well cost analysis will help determine the cost of a well for EGS development.

  6. track 1: systems analysis | geothermal 2015 peer review | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy 1: systems analysis | geothermal 2015 peer review track 1: systems analysis | geothermal 2015 peer review At the 2015 Peer Review in May, the Energy Department's Geothermal Technologies Office (GTO) introduced nine Energy Department-funded Systems Analysis projects for review. Research teams pursue and evaluate vital geothermal technical data that can help to locate geothermal reservoirs, target drilling, and tap geothermal systems for energy production. Innovative geothermal tools

  7. Technology Development and Field Trials of EGS Drilling Systems at Chocolate Mountain

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Steven Knudsen

    2012-01-01

    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 Department has recently completed a field demonstration of the applicability of advanced synthetic diamond drill bits for production geothermal drilling. Two commercially-available PDC bits were tested in a geothermal drilling program in the Chocolate Mountains in Southern California. These bits drilled the granitic formations with significantly better Rate of Penetration (ROP) and bit life than the roller cone bit they are compared with. Drilling records and bit performance data along with associated drilling cost savings are presented herein. The drilling trials have demonstrated PDC bit drilling technology has matured for applicability and improvements to geothermal drilling. This will be especially beneficial for development of Enhanced Geothermal Systems whereby resources can be accessed anywhere within the continental US by drilling to deep, hot resources in hard, basement rock formations.

  8. Towards Developing a Calibrated EGS Exploration Methodology Using...

    Open Energy Info (EERE)

    Towards Developing a Calibrated EGS Exploration Methodology Using the Dixie Valley Geothermal System, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  9. National Geothermal Resource Assessment and Classification

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    of the National Geothermal Data System. The results of this work will enable lower riskcost deployment of conventional and EGS geothermal power. USGS is also supporting GTP...

  10. International Partnership for Geothermal Technology - 2012 Peer...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Validation of an Advanced Stimulation Prediction Model for Enhanced Geothermal Systems (EGS) Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization

  11. Bradys EGS Project

    Broader source: Energy.gov [DOE]

    Geothermal Technologies Program 2010 Peer Review Bradys Engineered Geothermal Systems Project for Engineered Geothermal Systems Demonstration Projects Track and Innovative Exploration Technologies. Objective to stimulate permeability in tight well 15-12 and improve connection to rest of the field, improve overall productivity or injectivity.

  12. National Geothermal Data System (NGDS) Fact Sheet | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    National Geothermal Data System (NGDS) Fact Sheet National Geothermal Data System (NGDS) Fact Sheet Industry has named one of the largest barriers to widespread adoption of ...

  13. Numerical Modelling of Geothermal Systems a Short Introduction...

    Open Energy Info (EERE)

    Modelling of Geothermal Systems a Short Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Numerical Modelling of Geothermal Systems a Short...

  14. Active Geothermal Systems And Associated Gold Deposits In The...

    Open Energy Info (EERE)

    Geothermal Systems And Associated Gold Deposits In The Great Basin Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Active Geothermal Systems...

  15. Iowa: Geothermal System Creates Jobs, Reduces Emissions in Rural...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    geothermal wells in order to install a closed-loop geothermal heating and cooling system. ... The district geothermal system is designed to be scalable, so that more buildings can be ...

  16. EERE Success Story-Iowa: Geothermal System Creates Jobs, Reduces...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    geothermal wells in order to install a closed-loop geothermal heating and cooling system. ... The district geothermal system is designed to be scalable, so that more buildings can be ...

  17. National Geothermal Data System: A Geothermal Data System for Exploration and Development

    SciTech Connect (OSTI)

    Allison, Lee; Richard, Stephen; Patten, Kim; Love, Diane; Coleman, Celia; Chen, Genhan

    2012-09-30

    Geothermal-relevant geosciences data from all 50 states (www.stategeothermaldata.org), federal agencies, national labs, and academic centers are being digitized and linked in a distributed online network funded by the U.S. Department of Energy Geothermal Data System (GDS) to foster geothermal energy exploration and development through use of interactive online ‘mashups,’data integration, and applications. Emphasis is first to make as much information as possible accessible online, with a long range goal to make data interoperable through standardized services and interchange formats. A growing set of more than thirty geoscience data content models is in use or under development to define standardized interchange formats for: aqueous chemistry, borehole temperature data, direct use feature, drill stem test, seismic event hypocenter, fault feature, geologic contact feature, geologic unit feature, thermal/hot spring description, metadata, quaternary fault, volcanic vent description, well header feature, borehole lithology log, crustal stress, gravity, heat flow/temperature gradient, permeability, and feature description data like developed geothermal systems, geologic unit geothermal characterization, permeability, production data, rock alteration description, rock chemistry, and thermal conductivity. Map services are also being developed for isopach maps, aquifer temperature maps, and several states are working on geothermal resource overview maps. Content models are developed based on existing community datasets to encourage widespread adoption and promulgate content quality standards. Geoscience data and maps from other GDS participating institutions, or “nodes” (e.g., U.S. Geological Survey, Southern Methodist University, Oregon Institute of Technology, Stanford University, the University of Utah) are being supplemented with extensive land management and land use resources from the Western Regional Partnership (15 federal agencies and 5 Western states) to provide access to a comprehensive, holistic set of data critical to geothermal energy development. As of May 2012 , we have nearly 37,000 records registered in the system catalog, and 550,075 data resources online, along with hundreds of Web services to deliver integrated data to the desktop for free downloading or online use. The data exchange mechanism is built on the U.S. Geoscience Information Network (USGIN, http://usgin.org and http://lab.usgin.org) protocols and standards developed as a partnership of the Association of American State Geologists (AASG) and U.S. Geological Survey (USGS). Keywords Data

  18. Energy Department Announces National Geothermal Data System to Accelerate

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy Development | Department of Energy National Geothermal Data System to Accelerate Geothermal Energy Development Energy Department Announces National Geothermal Data System to Accelerate Geothermal Energy Development May 28, 2014 - 3:32pm Addthis In support of the Obama Administration's Open Data Policy to make data more accessible to the public and entrepreneurs, the Energy Department today officially launched the National Geothermal Data System (NGDS), an online open-source

  19. DOE Funds 21 Research, Development and Demonstration Projects for up to $78 Million to Promote Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Today at the National Geothermal Conference in Reno, Nev., Deputy Assistant Secretary for Renewable Energy Steve Chalk announced the U.S. Department of Energy's (DOE) awards under a Funding Opportunity Announcement (FOA) for research, development and demonstration of Enhanced Geothermal Systems (EGS) for next-generation geothermal energy technologies.

  20. Geographic Information System At Dixie Valley Geothermal Area...

    Open Energy Info (EERE)

    Nash & D., 1997) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At Dixie Valley Geothermal Area (Nash & D., 1997)...

  1. Development of a plan to implement enhanced geothermal system...

    Open Energy Info (EERE)

    Enhanced Geothermal Systems was proposed. This embraces the idea that the amount of permeability and fluid in geothermal resources varies across a spectrum, with HDR at one end,...

  2. Geology and alteration of the Raft River geothermal system, Idaho...

    Open Energy Info (EERE)

    Raft River geothermal system, Idaho Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Geology and alteration of the Raft River geothermal...

  3. Fracture Characterization in Enhanced Geothermal Systems by Wellbore...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis; 2010 Geothermal Technology Program Peer Review Report Fracture Characterization in Enhanced ...

  4. Classification of Geothermal Systems: A Possible Scheme | Open...

    Open Energy Info (EERE)

    of Geothermal Systems: A Possible Scheme Abstract Abstract unavailable. Author Subir K. Sanyal Conference Thirtieth Workshop on Geothermal Reservoir Engineering; Stanford,...

  5. Microearthquake Technology for EGS Fracture Characterization...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Microearthquake Technology for EGS Fracture Characterization; 2010 Geothermal Technology Program Peer Review Report Microearthquake Technology for EGS Fracture Characterization; ...

  6. Tracers for Characterizing Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Karen Wright; George Redden; Carl D. Palmer; Harry Rollins; Mark Stone; Mason Harrup; Laurence C. Hull

    2010-02-01

    Information about the times of thermal breakthrough and subsequent rates of thermal drawdown in enhanced geothermal systems (EGS) is necessary for reservoir management, designing fracture stimulation and well drilling programs, and forecasting economic return. Thermal breakthrough in heterogeneous porous media can be estimated using conservative tracers and assumptions about heat transfer rates; however, tracers that undergo temperature-dependent changes can provide more detailed information about the thermal profile along the flow path through the reservoir. To be effectively applied, the thermal reaction rates of such temperature sensitive traces must be well characterized for the range of conditions that exist in geothermal systems. Reactive tracers proposed in the literature include benzoic and carboxylic acids (Adams) and organic esters and amides (Robinson et al.); however, the practical temperature range over which these tracers can be applied (100-275C) is somewhat limited. Further, for organic esters and amides, little is known about their sorption to the reservoir matrix and how such reactions impact data interpretation. Another approach involves tracers where the reference condition is internal to the tracer itself. Two examples are: 1) racemization of polymeric amino acids, and 2) mineral thermoluminescence. In these cases internal ratios of states are measured rather than extents of degradation and mass loss. Racemization of poly-L-lactic acid (for example) is temperature sensitive and therefore can be used as a temperature-recording tracer depending on the rates of racemization and stability of the amino acids. Heat-induced quenching of thermoluminescence of pre-irradiated LiF can also be used. To protect the tracers from alterations (extraneous reactions, dissolution) in geothermal environments we are encapsulating the tracers in core-shell colloidal structures that will subsequently be tested for their ability to be transported and to protect the tracers from incidental reactions. We review the criteria for practical reactive tracers, which serves as the basis for experimental testing and characterization and can be used to identify other potential candidate tracers. We will also discuss the information obtainable from individual tracers, which has implications for using multiple tracers to obtain information about the thermal history of a reservoir. We will provide an update on our progress for conducting proof-of-principle tests for reactive tracers in the Raft River geothermal system.

  7. JASON Study Highlights Huge Potential for EGS | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    JASON Study Highlights Huge Potential for EGS JASON Study Highlights Huge Potential for EGS February 26, 2014 - 12:00am Addthis A new study commissioned by the Energy Department's Geothermal Technologies Office (GTO) highlights the vast potential for enhanced geothermal systems (EGS) to provide clean, reliable, and sustainable energy to American homes and businesses.The conclusions of the JASON study support GTO's long-term strategic trajectory for EGS development, which includes using EGS at

  8. Small geothermal electric systems for remote powering

    SciTech Connect (OSTI)

    Entingh, Daniel J.; Easwaran, Eyob.; McLarty, Lynn

    1994-08-08

    This report describes conditions and costs at which quite small (100 to 1,000 kilowatt) geothermal systems could be used for off-grid powering at remote locations. This is a first step in a larger process of determining locations and conditions at which markets for such systems could be developed. The results suggest that small geothermal systems offer substantial economic and environmental advantages for powering off-grid towns and villages. Geothermal power is most likely to be economic if the system size is 300 kW or greater, down to reservoir temperatures of 100{degree}C. For system sizes smaller than 300 kW, the economics can be favorable if the reservoir temperature is about 120{degree}C or above. Important markets include sites remote from grids in many developing and developed countries. Estimates of geothermal resources in many developing countries are shown.

  9. Fluid Imaging of Enhanced Geothermal Systems through Joint 3D...

    Open Energy Info (EERE)

    reservoirs that have been created to extract economical amounts of heat from low permeability andor porosity geothermal resources. Critical to the success of EGS is the...

  10. Metal Organic Heat Carriers for Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Program Peer Review 2010 - Presentation. This project addresses Energy Conversion Barrier N -Inability to lower the temperature conditions under which EGS power generation is commercially viable.

  11. Towards the Understanding of Induced Seismicity in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Gritto, Roland; Dreger, Douglas; Heidbach, Oliver

    2014-08-29

    This DOE funded project was a collaborative effort between Array Information Technology (AIT), the University of California at Berkeley (UCB), the Helmholtz Centre Potsdam - German Research Center for Geosciences (GFZ) and the Lawrence Berkeley National Laboratory (LBNL). It was also part of the European research project “GEISER”, an international collaboration with 11 European partners from six countries including universities, research centers and industry, with the goal to address and mitigate the problems associated with induced seismicity in Enhanced Geothermal Systems (EGS). The goal of the current project was to develop a combination of techniques, which evaluate the relationship between enhanced geothermal operations and the induced stress changes and associated earthquakes throughout the reservoir and the surrounding country rock. The project addressed the following questions: how enhanced geothermal activity changes the local and regional stress field; whether these activities can induce medium sized seismicity M > 3; (if so) how these events are correlated to geothermal activity in space and time; what is the largest possible event and strongest ground motion, and hence the potential hazard associated with these activities. The development of appropriate technology to thoroughly investigate and address these questions required a number of datasets to provide the different physical measurements distributed in space and time. Because such a dataset did not yet exist for an EGS system in the United State, we used current and past data from The Geysers geothermal field in northern California, which has been in operation since the 1960s. The research addressed the need to understand the causal mechanisms of induced seismicity, and demonstrated the advantage of imaging the physical properties and temporal changes of the reservoir. The work helped to model the relationship between injection and production and medium sized magnitude events that have jeopardized, and in some cases suspended, the generation of energy from EGS systems worldwide.

  12. FORGE is an EGS laboratory

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    FORGE is an EGS laboratory where the subsurface scientific community can test and improve new technologies and techniques for creating and sustaining next-generation geothermal ...

  13. U.S. and Australian Advanced Geothermal Projects Face Setbacks

    Broader source: Energy.gov [DOE]

    Efforts to develop and commercialize a new type of geothermal energy, called Enhanced Geothermal Systems (EGS), are facing technical setbacks in both the United States and Australia.

  14. Concept Testing and Development at the Raft River Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DOE 2010 Geothermal Technologies Program Peer Review PDF icon egs007moore.pdf More Documents & Publications Demonstration of an Enhanced Geothermal System at the Northwest ...

  15. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    2013-05-15

    The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

  16. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

  17. Water Resource Assessment of Geothermal Resources and Water Use in Geopressured Geothermal Systems

    SciTech Connect (OSTI)

    Clark, C. E.; Harto, C. B.; Troppe, W. A.

    2011-09-01

    This technical report from Argonne National Laboratory presents an assessment of fresh water demand for future growth in utility-scale geothermal power generation and an analysis of fresh water use in low-temperature geopressured geothermal power generation systems.

  18. Life-Cycle Analysis Results of Geothermal Systems in Comparison...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems A ...

  19. Creation of an Engineered Geothermal System through Hydraulic and Thermal

    Broader source: Energy.gov (indexed) [DOE]

    Stimulation | Department of Energy Project objectives: To create an Enhanced Geothermal System on the margin of the Cosofield through the hydraulic, thermal, and/or chemical stimulation of one or more tight injection wells; To increase the productivity of the Cosofield by 10 MWe; To develop and calibrate geomechanical, geochemical, and fluid flow models in order to extend the Coso/EGS concepts to wherever appropriate tectonic and thermal conditions apply. PDF icon

  20. Town of Pagosa Springs geothermal heating system

    SciTech Connect (OSTI)

    Garcia, M.B.

    1997-08-01

    The Town of Pagosa Springs has owned and operated a geothermal heating system since December 1982 to provide geothermal heating during the fall, winter and spring to customers in this small mountain town. Pagosa Springs is located in Archuleta County, Colorado in the southwestern corner of the State. The Town, nestled in majestic mountains, including the Continental Divide to the north and east, has an elevation of 7,150 feet. The use of geothermal water in the immediate area, however, dates back to the 1800`s, with the use of Ute Bands and the Navajo Nation and later by the U.S. Calvery in the 1880`s (Lieutenant McCauley, 1878). The Pagosa area geothermal water has been reported to have healing and therapeutic qualities.

  1. Laser-Mechanical Drilling for Geothermal Energy: Low-Contact Drilling Technology to Enable Economical EGS Wells

    SciTech Connect (OSTI)

    2010-01-15

    Broad Funding Opportunity Announcement Project: Foro Energy is developing a unique capability and hardware system to transmit high power lasers over long distances via fiber optic cables. This laser power is integrated with a mechanical drilling bit to enable rapid and sustained penetration of hard rock formations too costly to drill with mechanical drilling bits alone. The laser energy that is directed at the rock basically softens the rock, allowing the mechanical bit to more easily remove it. Foro Energy’s laser-assisted drill bits have the potential to be up to 10 times more economical than conventional hard-rock drilling technologies, making them an effective way to access the U.S. energy resources currently locked under hard rock formations.

  2. Engineered Geothermal Systems Energy Return On Energy Investment

    SciTech Connect (OSTI)

    Mansure, A J

    2012-12-10

    Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. Too often comparisons of energy systems use “efficiency” when EROI would be more appropriate. For geothermal electric power generation, EROI is determined by the electricity delivered to the consumer compared to the energy consumed to construct, operate, and decommission the facility. Critical factors in determining the EROI of Engineered Geothermal Systems (EGS) are examined in this work. These include the input energy embodied into the system. Embodied energy includes the energy contained in the materials, as well as, that consumed in each stage of manufacturing from mining the raw materials to assembling the finished system. Also critical are the system boundaries and value of the energy – heat is not as valuable as electrical energy. The EROI of an EGS depends upon a number of factors that are currently unknown, for example what will be typical EGS well productivity, as well as, reservoir depth, temperature, and temperature decline rate. Thus the approach developed is to consider these factors as parameters determining EROI as a function of number of wells needed. Since the energy needed to construct a geothermal well is a function of depth, results are provided as a function of well depth. Parametric determination of EGS EROI is calculated using existing information on EGS and US Department of Energy (DOE) targets and is compared to the “minimum” EROI an energy production system should have to be an asset rather than a liability.

  3. DOE and Partners Demonstrate Mobile Geothermal Power System at 2009 Geothermal Energy Expo

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO), along with Pratt & Whitney Power Systems, and Chena Power LLC demonstrated the PureCycle® mobile geothermal power generation unit at the 2009 Geothermal Energy Expo in Reno, Nevada.

  4. EGS Success Stories | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EGS Success Stories EGS Success Stories November 18, 2015 Geothermal Well Head, Utah Road Tripping through the Geothermal Frontier And they're off! After more than a year since the announcement of available funding, the project teams selected for our Frontier Observatory for Research in Geothermal Energy (FORGE) each hosted our geothermal experts at their candidate sites this fall. We're calling it our road trip through the geothermal frontier. June 9, 2015 EGS Success Stories Energy Department

  5. National Geothermal Data System (NGDS) Geothermal Data: Community Requirements and Information Engineering

    SciTech Connect (OSTI)

    Anderson, Arlene; Blackwell, David; Chickering, Cathy; Boyd, Toni; Horne, Roland; MacKenzie, Matthew; Moore, Joseph; Nickull, Duane; Richard, Stephen; Shevenell, Lisa A.

    2013-10-01

    To satisfy the critical need for geothermal data to advance geothermal energy as a viable renewable energy contender, the U.S. Department of Energy is investing in the development of the National Geothermal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to supply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are discussed. In particular, this paper addresses the various types of data required to effectively assess geothermal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS includes a work plan that addresses data assets and resources of interest to users, a survey of data providers, data content models, and how data will be exchanged and promoted, as well as lessons learned within the geothermal community.

  6. Geothermal reservoirs in hydrothermal convection systems

    SciTech Connect (OSTI)

    Sorey, M.L.

    1982-01-01

    Geothermal reservoirs commonly exist in hydrothermal convection systems involving fluid circulation downward in areas of recharge and upwards in areas of discharge. Because such reservoirs are not isolated from their surroundings, the nature of thermal and hydrologic connections with the rest of the system may have significant effects on the natural state of the reservoir and on its response to development. Conditions observed at numerous developed and undeveloped geothermal fields are discussed with respect to a basic model of the discharge portion of an active hydrothermal convection system. Effects of reservoir development on surficial discharge of thermal fluid are also delineated.

  7. National Geothermal Data System Architecture Design, Testing and Maintenance

    Broader source: Energy.gov [DOE]

    Project objective: To create the National Geothermal Data System (NGDS) comprised of a core and distributed network of databases and data sites that will comprise a federated system for acquisition, management, maintenance, and dissemination of geothermal and related data.

  8. GTP Adds Meeting on the National Geothermal Data System Project...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Adds Meeting on the National Geothermal Data System Project to Peer Review GTP Adds Meeting on the National Geothermal Data System Project to Peer Review May 10, 2010 - 2:41pm...

  9. National Geothermal Data System Deployed to Serve Industry | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy National Geothermal Data System Deployed to Serve Industry National Geothermal Data System Deployed to Serve Industry May 28, 2014 - 9:08am Addthis The National Geothermal Data System deploys free, open-source online scientific information, a mammoth resource of geoscience data. In the data visualization shown here, Schlumberger utilized bottom hole temperatures from the National Geothermal Data Systems (NDGS) on-line platform to supplement subscription data temperatures used to

  10. EERE Success Story-Iowa: Geothermal System Creates Jobs, Reduces

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Emissions in Rural Community | Department of Energy Geothermal System Creates Jobs, Reduces Emissions in Rural Community EERE Success Story-Iowa: Geothermal System Creates Jobs, Reduces Emissions in Rural Community November 6, 2013 - 12:00am Addthis Utilizing funding from EERE and cost shares from other federal agencies, the City of West Union, Iowa, drilled geothermal wells in order to install a closed-loop geothermal heating and cooling system. The system is designed to serve 330,000

  11. Ball State building massive geothermal system

    Broader source: Energy.gov [DOE]

    Ball State University is building America’s largest ground source district geothermal heating and cooling system. The new operation will save the school millions of dollars, slash greenhouse gases and create jobs. The project will also “expand how America will define the use of geothermal technology on a district-wide scale,” and provide health benefits such as reducing asthma rates for Indiana residents, says Philip Sachtleben, Ball State’s associate vice president of governmental relations. The system will cool and heat nearly 50 buildings on Ball State’s Muncie, Ind., campus, replace four coal-burning boilers and span more than 600 acres. The switch to geothermal will save the university $2.2 million in fuel costs and cut its carbon footprint in half.

  12. DOE-Backed Project Will Demonstrate Innovative Geothermal Technology

    Broader source: Energy.gov [DOE]

    As part of DOE's Geothermal Technologies Program, two geothermal companies, AltaRock Energy and Davenport Newberry, announced plans on June 8 to conduct a demonstration of Enhanced Geothermal Systems (EGS) technology at a site located near Bend, Oregon.

  13. Geothermal Energy Association Recognizes the National Geothermal Data System

    Broader source: Energy.gov [DOE]

    The Geothermal Energy Association (GEA) announced today the winners of their 2014 GEA Honors, which recognizes companies, projects, and individuals who have demonstrated outstanding achievement in...

  14. The Krafla Geothermal System. A Review of Geothermal Research...

    Open Energy Info (EERE)

    A Review of Geothermal Research and Revision of the Conceptual Model Authors Mortensen A.K., Gudmundsson ., Steingrmsson B., Sigmundsson F., Axelsson G., rmannsson H.,...

  15. Characterizing Structural Controls of EGS Candidate and Conventional...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Structural Controls of EGS Candidate and Conventional Geothermal Reservoirs in the Great ... Characterizing Structural Controls of EGS Candidate and Conventional Geothermal Reservoirs ...

  16. What is the National Geothermal Data System (NGDS)? Fact Sheet

    SciTech Connect (OSTI)

    U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy

    2012-09-03

    Overview of the National Geothermal Data System, a distributed, interoperable network of data repositories and state geological service providers from across the U.S. and the nation's leading academic geothermal centers.

  17. Electronic Submersible Pump (ESP) Technology and Limitations with Respect to Geothermal Systems (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    The current state of geothermal technology has limitations that hinder the expansion of utility scale power. One limitation that has been discussed by the current industry is the limitation of Electric Submersible Pump (ESP) technology. With the exception of a few geothermal fields artificial lift technology is dominated by line shaft pump (LSP) technology. LSP's utilize a pump near or below reservoir depth, which is attached to a power shaft that is attached to a motor above ground. The primary difference between an LSP and an ESP is that an ESP motor is attached directly to the pump which eliminates the power shaft. This configuration requires that the motor is submersed in the geothermal resource. ESP technology is widely used in oil production. However, the operating conditions in an oil field vary significantly from a geothermal system. One of the most notable differences when discussing artificial lift is that geothermal systems operate at significantly higher flow rates and with the potential addition of Enhanced Geothermal Systems (EGS) even greater depths. The depths and flow rates associated with geothermal systems require extreme horsepower ratings. Geothermal systems also operate in a variety of conditions including but not limited to; high temperature, high salinity, high concentrations of total dissolved solids (TDS), and non-condensable gases.

  18. National Geothermal Data System & Online Tools Presentation (IEA-GIA event)

    SciTech Connect (OSTI)

    Jay Nathwani

    2011-09-30

    Geothermal Technologies Program presentation by Jay Nathwani on the National Geothermal Data System, 9-30-2011.

  19. National Geothermal Data System Deployed | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Deployed National Geothermal Data System Deployed In support of the Obama Administration's Open Data Policy, on May 28, 2014, the United States Department of Energy (DOE) announced deployment of the National Geothermal Data System (NGDS), an online, open-source platform that facilitates discovery and use of subsurface geothermal data for research and energy production. This open source platform responds to one of industry's greatest barriers to geothermal development and deployment: the

  20. Geothermal Energy Association Recognizes the National Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy Association Recognizes the National Geothermal Data System Geothermal Energy Association Recognizes the National Geothermal Data System July 29, 2014 - 8:20am...

  1. Appendix F - GPRA06 geothermal technologies program documentation

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The primary goal of the Geothermal Technologies Program is to reduce the cost of geothermal generation technologies, including both conventional and enhanced geothermal systems (EGS). EGS are defined as geothermal systems where the reservoir requires substantial engineering manipulation to make using the reservoir economically feasible.

  2. Materials selection guidelines for geothermal energy utilization systems

    SciTech Connect (OSTI)

    Ellis, P.F. II; Conover, M.F.

    1981-01-01

    This manual includes geothermal fluid chemistry, corrosion test data, and materials operating experience. Systems using geothermal energy in El Salvador, Iceland, Italy, Japan, Mexico, New Zealand, and the United States are described. The manual provides materials selection guidelines for surface equipment of future geothermal energy systems. The key chemical species that are significant in determining corrosiveness of geothermal fluids are identified. The utilization modes of geothermal energy are defined as well as the various physical fluid parameters that affect corrosiveness. Both detailed and summarized results of materials performance tests and applicable operating experiences from forty sites throughout the world are presented. The application of various non-metal materials in geothermal environments are discussed. Included in appendices are: corrosion behavior of specific alloy classes in geothermal fluids, corrosion in seawater desalination plants, worldwide geothermal power production, DOE-sponsored utilization projects, plant availability, relative costs of alloys, and composition of alloys. (MHR)

  3. GRC Workshop: The Power of the National Geothermal Data System

    Office of Energy Efficiency and Renewable Energy (EERE)

    Drilling Down: How Legacy and New Research Data Can Advance Geothermal DevelopmentThe Power of the National Geothermal Data System (NGDS) A workshop at the Geothermal Resources Council Annual Meeting in Las Vegas, Nevada Abstract: The National Geothermal Data System's (NGDS) launch in 2014 will provide open access to millions of datasets, sharing technical geothermal-relevant data across the geosciences to propel geothermal development and production forward. By aggregating findings from the Energy Department's RD&D projects and consistent, reliable geological and geothermal information from all 50 states, this free, interactive tool can shorten project development timelines and facilitate scientific discovery and best practices. Stop by our workshop for an overview of how your company can benefit from implementing, and participating in this open-source based, distributed network. To register for the GRC Annual Meeting, visit the GRC Annual Meeting and GEA Geothermal Energy Expo event website.

  4. The EGS4 Code System: Solution of Gamma-ray and Electron Transport Problems

    DOE R&D Accomplishments [OSTI]

    Nelson, W. R.; Namito, Yoshihito

    1990-03-01

    In this paper we present an overview of the EGS4 Code System -- a general purpose package for the Monte Carlo simulation of the transport of electrons and photons. During the last 10-15 years EGS has been widely used to design accelerators and detectors for high-energy physics. More recently the code has been found to be of tremendous use in medical radiation physics and dosimetry. The problem-solving capabilities of EGS4 will be demonstrated by means of a variety of practical examples. To facilitate this review, we will take advantage of a new add-on package, called SHOWGRAF, to display particle trajectories in complicated geometries. These are shown as 2-D laser pictures in the written paper and as photographic slides of a 3-D high-resolution color monitor during the oral presentation. 11 refs., 15 figs.

  5. Geothermal Energy at the U.S. Department of Energy | Department...

    Energy Savers [EERE]

    be able to develop, test, and accelerate breakthroughs in enhanced geothermal system (EGS) technologies and techniques. Read more Geothermal Data Repository hits important...

  6. NREL: Dynamic Maps, GIS Data, and Analysis Tools - Geothermal Prospector

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Geothermal Prospector Start exploring U.S. geothermal resources with an easy-to-use map by selecting data layers that are NGDS compatible. Bookmark and Share Geothermal Prospector The Geothermal Prospector mapping tool provides an excellent data resource for visual exploration of geothermal resources using the tools and datasets required to produce and disseminate both exploration gap analysis and Enhanced Geothermal System (EGS) planning and analysis. In 2010, NREL developed Geothermal

  7. NREL: Renewable Resource Data Center - Geothermal Resource Data

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resource Data The following geothermal resource data collections can be found in the Renewable Resource Data Center (RReDC). Geothermal Resource Data The datasets on this page offer a qualitative assessment of geothermal potential for the U.S. using Enhanced Geothermal Systems (EGS) and based on the levelized cost of electricity, and the Texas Geopressured Geothermal Resource Estimate. Geothermal data sites Data related to geothermal technology and energy

  8. Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    This Protocol is a living guidance document for geothermal developers, public officials, regulators and the general public that provides a set of general guidelines detailing useful steps to evaluate and manage the effects of induced seismicity related to EGS projects.

  9. Quantum Dot Tracers for Use in Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: To develop and demonstrate a new class of tracers„semiconductor nanoparticles(quantum dots)„that offer great promise for use in characterizing fracture networks in EGS reservoirs.

  10. Enhanced Geothermal Systems Documents for Public Comment- Now Closed

    Broader source: Energy.gov [DOE]

    The DOE Geothermal Technologies Program invited the public's input on the technology improvement areas identified at the EGS Technology Roadmapping Information Exchange meeting held in San Francisco, California on August 3-4, 2011.

  11. Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Majer, Ernie; Nelson, James; Robertson-Tait, Ann; Savy, Jean; Wong, Ivan

    2012-01-01

    This Protocol is a living guidance document for geothermal developers, public officials, regulators and the general public that provides a set of general guidelines detailing useful steps to evaluate and manage the effects of induced seismicity related to EGS projects.

  12. Sedimentary Geothermal Systems | Open Energy Information

    Open Energy Info (EERE)

    Heat Pumps Sedimentary Geothermal Links Related documents and websites Estimate of the Geothermal Energy Resource in the Major Sedimentary Basins in the United States...

  13. Residential Geothermal Systems Credit | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Residential Low Income Residential Savings Category Geothermal Heat Pumps Geothermal Direct-Use Maximum Rebate 1,500 Program Info Sector Name State Administrator Montana...

  14. Characterizing Structural Controls of EGS Candidate and Conventional Geothermal Reservoirs in the Great Basin: Developing Successful Exploration Strategies in Extended Terranes

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Develop catalogue of favorable structural environments and models; improve site-specific targeting of resources through detailed studies of representative sites; and compare structural controls and models in different tectonic settings.

  15. Geothermal Heating and Cooling Systems Featured on NBC Nightly...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York. Demand for these systems is growing; nationally, shipments of geothermal...

  16. Blind Geothermal System Exploration in Active Volcanic Environments...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Blind Geothermal System Exploration in Active Volcanic Environments; Multi-phase Geophysical and Geochemical Surveys in Overt & Subtle Volcanic Systems, Hawaii & Maui Blind...

  17. National Geothermal Data Systems Data Acquisition and Access...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Systems Data Acquisition and Access National Geothermal Data Systems Data Acquisition and Access Project objective: To support the acquisition of new and legacy data from...

  18. Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Vermeul, Vincent R.; Reimus, P. W.; Newell, D.; Watson, Tom B.

    2010-06-01

    A recent report found that power and heat produced from engineered (or enhanced) geothermal systems (EGSs) could have a major impact on the United States while incurring minimal environmental impacts. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distributions, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for commercial development of geothermal energy. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. Modeling capabilities are being developed as part of this project to support laboratory and field testing to characterize engineered geothermal systems in single- and multi-well tests using tracers. The objective of this report is to describe the simulation plan and the status of model development for simulating tracer tests for characterizing EGS.

  19. Temporary Cementitious Sealers in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Sugama T.; Pyatina, T.; Butcher, T.; Brothers, L.; Bour, D.

    2011-12-31

    Unlike conventional hydrothennal geothermal technology that utilizes hot water as the energy conversion resources tapped from natural hydrothermal reservoir located at {approx}10 km below the ground surface, Enhanced Geothermal System (EGS) must create a hydrothermal reservoir in a hot rock stratum at temperatures {ge}200 C, present in {approx}5 km deep underground by employing hydraulic fracturing. This is the process of initiating and propagating a fracture as well as opening pre-existing fractures in a rock layer. In this operation, a considerable attention is paid to the pre-existing fractures and pressure-generated ones made in the underground foundation during drilling and logging. These fractures in terms of lost circulation zones often cause the wastage of a substantial amount of the circulated water-based drilling fluid or mud. Thus, such lost circulation zones must be plugged by sealing materials, so that the drilling operation can resume and continue. Next, one important consideration is the fact that the sealers must be disintegrated by highly pressured water to reopen the plugged fractures and to promote the propagation of reopened fractures. In response to this need, the objective of this phase I project in FYs 2009-2011 was to develop temporary cementitious fracture sealing materials possessing self-degradable properties generating when {ge} 200 C-heated scalers came in contact with water. At BNL, we formulated two types of non-Portland cementitious systems using inexpensive industrial by-products with pozzolanic properties, such as granulated blast-furnace slag from the steel industries, and fly ashes from coal-combustion power plants. These byproducts were activated by sodium silicate to initiate their pozzolanic reactions, and to create a cemetitious structure. One developed system was sodium silicate alkali-activated slag/Class C fly ash (AASC); the other was sodium silicate alkali-activated slag/Class F fly ash (AASF) as the binder of temper-try sealers. Two specific additives without sodium silicate as alkaline additive were developed in this project: One additive was the sodium carboxymethyl cellulose (CMC) as self-degradation promoting additive; the other was the hard-burned magnesium oxide (MgO) made from calcinating at 1,000-1,500 C as an expansive additive. The AASC and AASF cementitious sealers made by incorporating an appropriate amount of these additives met the following six criteria: 1) One dry mix component product; 2) plastic viscosity, 20 to 70 cp at 300 rpm; 3) maintenance of pumpability for at least 1 hour at 85 C; 4) compressive strength >2000 psi; 5) self-degradable by injection with water at a certain pressure; and 6) expandable and swelling properties; {ge}0.5% of total volume of the sealer.

  20. Systems for Electrical Power from Coproduced and Low Temperature Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Resources | Department of Energy Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources Presentation about Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources includes background, results and discussion, future plans and conclusion. PDF icon systems_for_electrical_power_from_coproduced_and_low_final.pdf More Documents & Publications AAPG

  1. Energy Return On Investment of Engineered Geothermal Systems Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Mansure, Chip

    EROI is a ratio of the energy delivered to the consumer to the energy consumed to build, operate, and decommission the facility. EROI is important in assessing the viability of energy alternatives. Currently EROI analyses of geothermal energy are either out-of-date, of uncertain methodology, or presented online with little supporting documentation. This data set is a collection of files documenting data used to calculate the Energy Return On Investment (EROI) of Engineered Geothermal Systems (EGS) and erratum to publications prior to the final report. Final report is available from the OSTI web site (http://www.osti.gov/geothermal/). Data in this collections includes the well designs used, input parameters for GETEM, a discussion of the energy needed to haul materials to the drill site, the baseline mud program, and a summary of the energy needed to drill each of the well designs. EROI is the ratio of the energy delivered to the customer to the energy consumed to construct, operate, and decommission the facility. Whereas efficiency is the ratio of the energy delivered to the customer to the energy extracted from the reservoir.

  2. Energy Return On Investment of Engineered Geothermal Systems Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Mansure, Chip

    2012-01-01

    EROI is a ratio of the energy delivered to the consumer to the energy consumed to build, operate, and decommission the facility. EROI is important in assessing the viability of energy alternatives. Currently EROI analyses of geothermal energy are either out-of-date, of uncertain methodology, or presented online with little supporting documentation. This data set is a collection of files documenting data used to calculate the Energy Return On Investment (EROI) of Engineered Geothermal Systems (EGS) and erratum to publications prior to the final report. Final report is available from the OSTI web site (http://www.osti.gov/geothermal/). Data in this collections includes the well designs used, input parameters for GETEM, a discussion of the energy needed to haul materials to the drill site, the baseline mud program, and a summary of the energy needed to drill each of the well designs. EROI is the ratio of the energy delivered to the customer to the energy consumed to construct, operate, and decommission the facility. Whereas efficiency is the ratio of the energy delivered to the customer to the energy extracted from the reservoir.

  3. Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems (EGS)

    Broader source: Energy.gov [DOE]

    This document is intended to assist industry and regulators identify important issues and parameters that may be necessary for the evaluation and mitigation of adverse effects of induced seismicity.

  4. Integrated EGS R&D FOA Selections | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Integrated EGS R&D FOA Selections Integrated EGS R&D FOA Selections Integrated EGS R&D FOA Selections The Geothermal Technologies Office announced selections for up to $10 million for Integrated EGS R&D to twelve collaborative enhanced geothermal systems (EGS) research and development projects that will use novel techniques to increase the precision and accuracy of measuring critical underground reservoir properties over time. Project teams will focus on the integration of a

  5. National Geothermal Data System Design and Testing | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    National Geothermal Data System Design and Testing presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon ngds_peer2013.pdf More Documents & Publications AASG State Geological Survey How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" National Geothermal Data Systems Data Acquisition and Access

  6. Structure of The Dixie Valley Geothermal System, a "Typical"...

    Open Energy Info (EERE)

    geothermal system have been debated for some time. The primary structural model ahs been a single fault with 54 dip. New data including a detailed gravity survey,...

  7. A Brief Classification of Geothermal Systems | Open Energy Information

    Open Energy Info (EERE)

    LibraryAdd to library General: A Brief Classification of Geothermal Systems Author Paul Brophy Published GRC Annual Meeting, 2007 DOI Not Provided Check for DOI availability:...

  8. Geographic Information System At Chena Geothermal Area (Holdmann...

    Open Energy Info (EERE)

    Details Location Chena Geothermal Area Exploration Technique Geographic Information System Activity Date 2005 - 2007 Usefulness useful DOE-funding Unknown Exploration Basis...

  9. Understanding The Chena Hot Springs, Alaska, Geothermal System...

    Open Energy Info (EERE)

    The Chena Hot Springs, Alaska, Geothermal System Using Temperature And Pressure Data From Exploration Boreholes Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  10. Final Report: Enhanced Geothermal Systems Technology Phase II...

    Open Energy Info (EERE)

    Systems Technology Phase II: Animas Valley, New Mexico Authors R.A. Cunniff and R.L. Bowers Published Lightning Dock Geothermal, Inc. Technical Report, 2003 DOI Not...

  11. Long Valley Caldera Geothermal and Magmatic Systems | Open Energy...

    Open Energy Info (EERE)

    Magmatic Systems Abstract Long Valley Caldera in eastern California has been explored for geothermal resources since the 1960s. Early shallow exploration wells (<300m) were located...

  12. Large Scale Geothermal Exchange System for Residential, Office...

    Open Energy Info (EERE)

    cool the project. To develop the geothermal exchange system, engineers at Madison-based Sustainable Engineering Group (SEG), collaborated with architects at Milwaukee-based...

  13. Reconnaissance geophysical studies of the geothermal system in...

    Open Energy Info (EERE)

    Reconnaissance geophysical studies of the geothermal system in southern Raft River Valley, Idaho Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  14. Helium isotopes in geothermal systems- Iceland, The Geysers,...

    Open Energy Info (EERE)

    isotopes in geothermal systems- Iceland, The Geysers, Raft River and Steamboat Springs Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Helium...

  15. High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  16. Creation of an Engineered Geothermal System through Hydraulic...

    Broader source: Energy.gov (indexed) [DOE]

    Project objectives: To create an Enhanced Geothermal System on the margin of the Cosofield through the hydraulic, thermal, andor chemical stimulation of one or more tight ...

  17. Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade

    Broader source: Energy.gov [DOE]

    Project Will Take Advantage of Abundant Water in Shallow Aquifer. Demonstrate Low Temperature GSHP System Design. Provides a Baseline for Local Industrial Geothermal Project Costs and Benefits.

  18. Towards the Understanding of Induced Seismicity in Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Towards the Understanding of Induced Seismicity in Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado

  19. Blind Geothermal System Exploration in Active Volcanic Environments...

    Open Energy Info (EERE)

    Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Blind Geothermal System Exploration in Active Volcanic Environments; Multi-phase Geophysical...

  20. Identification of a New Blind Geothermal System with Hyperspectral...

    Open Energy Info (EERE)

    a New Blind Geothermal System with Hyperspectral Remote Sensing and Shallow Temperature Measurements at Columbus Salt Marsh, Esmeralda County, Nevada Jump to: navigation, search...

  1. Enthalpy restoration in geothermal energy processing system

    DOE Patents [OSTI]

    Matthews, Hugh B.

    1983-01-01

    A geothermal deep well energy extraction system is provided of the general type in which solute-bearing hot water is pumped to the earth's surface from a relatively low temperature geothermal source by transferring thermal energy from the hot water to a working fluid for driving a primary turbine-motor and a primary electrical generator at the earth's surface. The superheated expanded exhaust from the primary turbine motor is conducted to a bubble tank where it bubbles through a layer of sub-cooled working fluid that has been condensed. The superheat and latent heat from the expanded exhaust of the turbine transfers thermal energy to the sub-cooled condensate. The desuperheated exhaust is then conducted to the condenser where it is condensed and sub-cooled, whereupon it is conducted back to the bubble tank via a barometric storage tank. The novel condensing process of this invention makes it possible to exploit geothermal sources which might otherwise be non-exploitable.

  2. National Geothermal Data System: Transforming the Discovery, Access, and Analytics of Data for Geothermal Exploration

    SciTech Connect (OSTI)

    Patten, Kim

    2013-05-01

    Compendium of Papers from the 38th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California February 11-13, 2013 The National Geothermal Data System (NGDS) is a distributed, interoperable network of data collected from state geological surveys across all fifty states and the nations leading academic geothermal centers. The system serves as a platform for sharing consistent, reliable, geothermal-relevant technical data with users of all types, while supplying tools relevant for their work. As aggregated data supports new scientific findings, this content-rich linked data ultimately broadens the pool of knowledge available to promote discovery and development of commercial-scale geothermal energy production. Most of the up-front risks associated with geothermal development stem from exploration and characterization of subsurface resources. Wider access to distributed data will, therefore, result in lower costs for geothermal development. NGDS is on track to become fully operational by 2014 and will provide a platform for custom applications for accessing geothermal relevant data in the U.S. and abroad. It is being built on the U.S. Geoscience Information Network (USGIN) data integration framework to promote interoperability across the Earth sciences community. The basic structure of the NGDS employs state-of-the art informatics to advance geothermal knowledge. The following four papers comprising this Open-File Report are a compendium of presentations, from the 38th Annual Workshop on Geothermal Reservoir Engineering, taking place February 11-13, 2013 at Stanford University, Stanford, California. NGDS Geothermal Data Domain: Assessment of Geothermal Community Data Needs, outlines the efforts of a set of nationwide data providers to supply data for the NGDS. In particular, data acquisition, delivery, and methodology are discussed. The paper addresses the various types of data and metadata required and why simple links to existing data are insufficient for promoting geothermal exploration. Authors of this paper are Arlene Anderson, US DOE Geothermal Technologies Office, David Blackwell, Southern Methodist University (SMU), Cathy Chickering (SMU), Toni Boyd, Oregon Institute of Technologys GeoHeat Center, Roland Horne, Stanford University, Matthew MacKenzie, Uberity, Joe Moore, University of Utah, Duane Nickull, Uberity, Stephen Richard, Arizona Geological Survey, and Lisa Shevenell, University of Nevada, Reno. NGDS User Centered Design: Meeting the Needs of the Geothermal Community, discusses the user- centered design approach taken in the development of a user interface solution for the NGDS. The development process is research based, highly collaborative, and incorporates state-of-the-art practices to ensure a quality user interface for the widest and greatest utility. Authors of this paper are Harold Blackman, Boise State University, Suzanne Boyd, Anthro-Tech, Kim Patten, Arizona Geological Survey, and Sam Zheng, Siemens Corporate Research. Fueling Innovation and Adoption by Sharing Data on the DOE Geothermal Data Repository Node on the National Geothermal Data System, describes the motivation behind the development of the Geothermal Data Repository (GDR) and its role in the NGDS. This includes the benefits of using the GDR to share geothermal data of all types and DOEs data submission process. Authors of this paper are Jon Weers, National Renewable Energy Laboratory and Arlene Anderson, US DOE Geothermal Technologies Office. Finally, Developing the NGDS Adoption of CKAN for Domestic & International Data Deployment, provides an overview of the Node-In-A-Box software package designed to provide data consumers with a highly functional interface to access the system, and to ease the burden on data providers who wish to publish data in the system. It is important to note that this software package constitutes a reference implementation and that the NGDS architecture is based on open standards, which means other server software can make resources available, and other client applications can utilize NGDS data. Authors of this paper are Ryan Clark, Arizona Geological Survey (AZGS), Christoph Kuhmuench, Siemens Corporate Research, and Stephen Richard, AZGS.

  3. IEA-GIA ExCo - National Geothermal Data System and Online Tools...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    IEA-GIA ExCo - National Geothermal Data System and Online Tools IEA-GIA ExCo - National Geothermal Data System and Online Tools National Geothermal Data System presentation by Jay ...

  4. IEA-GIA ExCo - National Geothermal Data System and Online Tools...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    IEA-GIA ExCo - National Geothermal Data System and Online Tools IEA-GIA ExCo - National Geothermal Data System and Online Tools National Geothermal Data System presentation by Jay...

  5. Geothermal energy control system and method

    DOE Patents [OSTI]

    Matthews, Hugh B.

    1977-01-01

    A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven pump at the well bottom for pumping the hot solute-bearing water at high pressure and in liquid state to the earth's surface, where it is used by transfer of its heat to a closed-loop boiler-turbine-alternator combination for the generation of electrical or other power. Residual concentrated solute-bearing water is pumped back into the earth. The clean cooled water is regenerated at the surface-located system and is returned to the deep well pumping system also for lubrication of a novel bearing arrangement supporting the turbine-driven pump system. The bearing system employs liquid lubricated thrust and radial bearings with all bearing surfaces bathed in clean water serving as a lubricant and maintained under pressure to prevent entry into the bearings of contaminated geothermal fluid, an auxiliary thrust ball bearing arrangement comes into operation when starting or stopping the pumping system.

  6. AASG State Geothermal Data Repository for the National Geothermal Data System.

    Energy Science and Technology Software Center (OSTI)

    2012-01-01

    This Drupal metadata and documents capture and management system is a repository, used for maintenance of metadata which describe resources contributed to the AASG State Geothermal Data System. The repository also provides an archive for files that are not hosted by the agency contributing the resource. Data from all 50 state geological surveys is represented here, and is contributed in turn to the National Geothermal Data System.

  7. Energy Department Announces $10 Million to Speed Enhanced Geothermal Systems into the Market

    Broader source: Energy.gov [DOE]

    In support President Obama’s all-of-the-above energy strategy, the Energy Department today announced $10 million to improve subsurface characterization for enhanced geothermal systems (EGS) by developing state-of-the-art methods that quantify critical underground reservoir properties as they change over time.

  8. An evaluation of enhanced geothermal systems technology

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    A review of the assumptions and conclusions of the DOE-sponsored 2006 MIT study on "The Future of Geothermal Energy" and an evaluation of relevant technology from the commercial geothermal industry.

  9. A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PROCEEDINGS, Thirty-Eighth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 11-13, 2013 SGP-TR-198 A TECHNOLOGY ROADMAP FOR STRATEGIC DEVELOPMENT OF ENHANCED GEOTHERMAL SYSTEMS John Ziagos 1 , Benjamin R. Phillips 2,3 , Lauren Boyd 3 , Allan Jelacic 2 , Greg Stillman 3 , and Eric Hass 4 1 Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550 2 SRA International, Inc. 3 Geothermal Technologies Office, U.S. DOE, 1000

  10. New Geothermal Data System Could Open Up Clean-Energy Reserves...

    Energy Savers [EERE]

    New Geothermal Data System Could Open Up Clean-Energy Reserves New Geothermal Data System Could Open Up Clean-Energy Reserves February 25, 2013 - 2:28pm Addthis New geothermal data...

  11. Geothermal

    Office of Scientific and Technical Information (OSTI)

    Geothermal Geothermal Legacy Collection Search the Geothermal Legacy Collection Search For Terms: Find + Advanced Search × Advanced Search All Fields: Title: Full Text: Bibliographic Data: Creator / Author: Name Name ORCID Search Authors Subject: Identifier Numbers: Research Org: Sponsoring Org: Publication Date: to Update Date: to Sort: Relevance (highest to lowest) Publication Date (newest first) Publication Date (oldest first) Legacy/Non-Legacy: All Legacy Non-Legacy Close Clear All Find

  12. Geothermal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Geothermal Geothermal Legacy Collection Search the Geothermal Legacy Collection Search For Terms: Find + Advanced Search × Advanced Search All Fields: Title: Full Text: Bibliographic Data: Creator / Author: Name Name ORCID Search Authors Subject: Identifier Numbers: Research Org: Sponsoring Org: Publication Date: to Update Date: to Sort: Relevance (highest to lowest) Publication Date (newest first) Publication Date (oldest first) Legacy/Non-Legacy: All Legacy Non-Legacy Close Clear All Find

  13. Geothermal energy control system and method

    DOE Patents [OSTI]

    Matthews, Hugh B.

    1976-01-01

    A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven pump at the well bottom for pumping the hot solute-bearing water at high pressure and in liquid state to the earth's surface, where it is used by transfer of its heat to a closed-loop boiler-turbine-alternator combination for the generation of electrical or other power. Residual concentrated solute-bearing water is pumped back into the earth. The clean cooled water is regenerated at the surface-located system and is returned to the deep well pumping system also for lubrication of a novel bearing arrangement supporting the turbine-driven pump system.

  14. Development of Models to Simulate Tracer Tests for Characterization of Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Williams, Mark D.; Reimus, Paul; Vermeul, Vincent R.; Rose, Peter; Dean, Cynthia A.; Watson, Tom B.; Newell, D.; Leecaster, Kevin; Brauser, Eric

    2013-05-01

    A recent report found that power and heat produced from enhanced (or engineered) geothermal systems (EGSs) could have a major impact on the U.S energy production capability while having a minimal impact on the environment. EGS resources differ from high-grade hydrothermal resources in that they lack sufficient temperature distribution, permeability/porosity, fluid saturation, or recharge of reservoir fluids. Therefore, quantitative characterization of temperature distributions and the surface area available for heat transfer in EGS is necessary for the design and commercial development of the geothermal energy of a potential EGS site. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate this characterization. This project was initially focused on tracer development with the application of perfluorinated tracer (PFT) compounds, non-reactive tracers used in numerous applications from atmospheric transport to underground leak detection, to geothermal systems, and evaluation of encapsulated PFTs that would release tracers at targeted reservoir temperatures. After the 2011 midyear review and subsequent discussions with the U.S. Department of Energy Geothermal Technology Program (GTP), emphasis was shifted to interpretive tool development, testing, and validation. Subsurface modeling capabilities are an important component of this project for both the design of suitable tracers and the interpretation of data from in situ tracer tests, be they single- or multi-well tests. The purpose of this report is to describe the results of the tracer and model development for simulating and conducting tracer tests for characterizing EGS parameters.

  15. Newberry Volcano EGS Demonstration - Phase I Results

    SciTech Connect (OSTI)

    William L. Osborn, Susan Petty, Trenton T. Cladouhos, Joe Iovenitti, Laura Nofziger, Owen Callahan, Douglas S. Perry and Paul L. Stern

    2011-10-23

    Phase I of the Newberry Volcano Enhanced Geothermal System (EGS) Demonstration included permitting, community outreach, seismic hazards analysis, initial microseismic array deployment and calibration, final MSA design, site characterization, and stimulation planning. The multi-disciplinary Phase I site characterization supports stimulation planning and regulatory permitting, as well as addressing public concerns including water usage and induced seismicity. A review of the project'™s water usage plan by an independent hydrology consultant found no expected impacts to local stakeholders, and recommended additional monitoring procedures. The IEA Protocol for Induced Seismicity Associated with Enhanced Geothermal Systems was applied to assess site conditions, properly inform stakeholders, and develop a comprehensive mitigation plan. Analysis of precision LiDAR elevation maps has concluded that there is no evidence of recent faulting near the target well. A borehole televiewer image log of the well bore revealed over three hundred fractures and predicted stress orientations. No natural, background seismicity has been identified in a review of historic data, or in more than seven months of seismic data recorded on an array of seven seismometers operating around the target well. A seismic hazards and induced seismicity risk assessment by an independent consultant concluded that the Demonstration would contribute no additional risk to residents of the nearest town of La Pine, Oregon. In Phase II of the demonstration, an existing deep hot well, NWG 55-29, will be stimulated using hydroshearing techniques to create an EGS reservoir. The Newberry Volcano EGS Demonstration is allowing geothermal industry and academic experts to develop, validate and enhance geoscience and engineering techniques, and other procedures essential to the expansion of EGS throughout the country. Successful development will demonstrate to the American public that EGS can play a significant role in reducing foreign energy dependence, and provide clean, renewable, baseload geothermal power generation in the State of Oregon.

  16. State Geological Survey Contributions to the National Geothermal Data System

    Broader source: Energy.gov [DOE]

    Project objectives: Deploy and populate the National Geothermal Data System (NGDS) with state-specific data by creating a national, sustainable, distributed, interoperable network of state geological survey-based data providers that will develop, collect, serve, and maintain geothermal-relevant data that operates as an integral compliant component of NGDS.

  17. Overview of the National Geothermal Data System (NGDS) and DOEs...

    Broader source: Energy.gov (indexed) [DOE]

    RAM Power Courtesy NREL Courtesy GRC 1 Arlene F. Anderson Technology Manager Geothermal Technologies Office Overview of the National Geothermal Data System (NGDS) &...

  18. Magnetotellurics At Dixie Valley Geothermal Area (Iovenitti,...

    Open Energy Info (EERE)

    H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Phil...

  19. National Geothermal Data System (NGDS) Initiative | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Determine geothermal potential * Guide exploration and development * Make data-driven ... In addition, all DOE-funded projects are required to register their data in the NGDS, ...

  20. National Geothermal Data System Architecture Design, Testing...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    related information. * Partners - GeoHeat Center (Oregon Institute of Technology); Stanford Geothermal Program (Stanford Univ.); U.S. Geological Survey, Great Basin Center for...

  1. Chemical Energy Carriers (CEC) for the Utilization of Geothermal Energy

    Office of Energy Efficiency and Renewable Energy (EERE)

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: Develop chemical energy carrier (CEC) systems to recover thermal energy from enhanced geothermal systems (EGS) in the form of chemical energy, in addition to sensible and latent energy.

  2. Geothermal system saving money at fire station | Department of...

    Broader source: Energy.gov (indexed) [DOE]

    A geothermal heating and cooling system has enabled the substation to save taxpayers 15,000 annually when compared to a traditional system. The high temperature of the treatment...

  3. Life-Cycle Analysis Results of Geothermal Systems in Comparison...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne ...

  4. Energy Department Announces Project Selections for Enhanced Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Systems (EGS) Subsurface Laboratory | Department of Energy Energy Department Announces Project Selections for Enhanced Geothermal Systems (EGS) Subsurface Laboratory Energy Department Announces Project Selections for Enhanced Geothermal Systems (EGS) Subsurface Laboratory April 28, 2015 - 9:43am Addthis Energy Department Announces Project Selections for Enhanced Geothermal Systems (EGS) Subsurface Laboratory WASHINGTON, DC - As part of the Obama Administration's all-of-the-above energy

  5. Development of an Improved Cement for Geothermal Wells | Department of

    Broader source: Energy.gov (indexed) [DOE]

    Energy Development of an Improved Cement for Geothermal Wells presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon cement_wells_trabits_peer2013.pdf More Documents & Publications Development of an Improved Cement for Geothermal Wells Geopolymer Sealing Materials track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review

  6. Design, construction and evaluation of a simulated geothermal flow system

    SciTech Connect (OSTI)

    Mackanic, J.C.

    1980-07-28

    A system was designed and built to simulate the flow from a geothermal well. The simulated flow will be used to power a Lysholm engine, the performance of which will then be evaluated for different simulated geothermal flows. Two main subjects are covered: 1) the design, construction and evaluation of the behavior of the system that simulates the geothermal flow; included in that topic is a discussion of the probable behavior of the Lysholm engine when it is put into operation, and 2) the investigation of the use of dynamic modeling techniques to determine whether they can provide a suitable means for predicting the behavior of the system.

  7. High-Temperature Circuit Boards for use in Geothermal Well Monitoring...

    Open Energy Info (EERE)

    these deep wells to create geothermal reservoirs is referred to as Enhanced Geothermal System (EGS). An important near-term need for the EGS community is data-logging tools that...

  8. Characterization of a geothermal system in the Upper Arkansas...

    Open Energy Info (EERE)

    of a geothermal system in the Upper Arkansas Valley Authors T. Blum, K. van Wijk, L. Liberty, M. Batzle, R. Krahenbuhl, A. Revil and R. Reynolds Conference Society of...

  9. Geochemical characterization of geothermal systems in the Great...

    Open Energy Info (EERE)

    Basin. Development of this database is one of the first steps in understanding the nature of geothermal systems in the Great Basin. Of particular importance in the Great Basin...

  10. How to Utilize the National Geothermal Data System (NGDS) and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Network with "Node-In-A-Box" How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" PDF icon ...

  11. Geothermal Heating and Cooling Systems Featured on NBC Nightly News

    Broader source: Energy.gov [DOE]

    NBC Nightly News recently featured a story on geothermal heating and cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York.

  12. Geothermal System Saves Dollars, Makes Sense for Maryland Family

    Broader source: Energy.gov [DOE]

    Derwood, Maryland resident Chris Gearon shares how he used a tax credit from the Recovery Act to help upgrade the heating and cooling system in his home to a geothermal one helping him save money and energy.

  13. Evolution of a Mineralized Geothermal System, Valles Caldera...

    Open Energy Info (EERE)

    Journal Article: Evolution of a Mineralized Geothermal System, Valles Caldera, New Mexico Abstract The 20-km-diam Valles caldera formed at 1.13 Ma and had continuous...

  14. Co-Produced Geothermal Systems | Open Energy Information

    Open Energy Info (EERE)

    Geothermal System: Co-Produced water is the water that is produced as a by-product during oil and gas production. If there is enough water produced at a high enough temperature...

  15. Reservoir Investigations on the Hot Dry Rock Geothermal System...

    Open Energy Info (EERE)

    Investigations on the Hot Dry Rock Geothermal System, Fenton Hill, New Mexico- Tracer Test Results Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

  16. Geothermal Energy: A Glance Back and a Leap Forward | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy: A Glance Back and a Leap Forward Geothermal Energy: A Glance Back and a Leap Forward October 23, 2013 - 1:31pm Addthis This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department Lauren Boyd Lauren Boyd Program Manager, Enhanced Geothermal Systems (EGS) HOW EGS WORKS Imagine taking an elevator down 900 stories-over two and a half miles

  17. A Technology Roadmap for Strategic Development of Enhanced Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Systems | Department of Energy A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems DOE Project Partner AltaRock Energy drills for geothermal energy at the Newberry Volcano EGS Demonstration site, near Bend, Oregon. DOE Project Partner AltaRock Energy drills for geothermal energy at the Newberry Volcano EGS Demonstration site, near Bend, Oregon. This technical paper outlines opportunities

  18. Further Developments on the Geothermal System Scoping Model: Preprint

    SciTech Connect (OSTI)

    Antkowiak, M.; Sargent, R.; Geiger, J. W.

    2010-07-01

    This paper discusses further developments and refinements for the uses of the Geothermal System Scoping Model in an effort to provide a means for performing a variety of trade-off analyses of surface and subsurface parameters, sensitivity analyses, and other systems engineering studies in order to better inform R&D direction and investment for the development of geothermal power into a major contributor to the U.S. energy supply.

  19. Tectonic & Structural Controls of Great Basin Geothermal Systems:

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Developing Successful Exploration Strategies | Department of Energy Tectonic & Structural Controls of Great Basin Geothermal Systems: Developing Successful Exploration Strategies Tectonic & Structural Controls of Great Basin Geothermal Systems: Developing Successful Exploration Strategies Keeping Nevada in Hot Water presentation by James Faulds of University of Nevada, Reno at the 2013 Annual Peer Review meeting in Colorado. PDF icon nevada_hotwater_peerreview2013.pdf More Documents

  20. Heat pump assisted geothermal heating system for Felix Spa, Romania

    SciTech Connect (OSTI)

    Rosca, Marcel; Maghiar, Teodor

    1996-01-24

    The paper presents a pre-feasibility type study of a proposed heat pump assisted geothermal heating system for an average hotel in Felix Spa, Romania. After a brief presentation of the geothermal reservoir, the paper gives the methodology and the results of the technical and economical calculations. The technical and economical viability of the proposed system is discussed in detail in the final part of the paper.

  1. EA-1893: Canby Cascaded Geothermal Development System, Canby, California

    Broader source: Energy.gov [DOE]

    This EA will evaluate the environmental impacts of a proposal by Modoc Contracting Company to use DOE grant funds to fulfill its plan to expand its reliance on geothermal resources by producing more hot water and using it to produce power as well as thermal energy. The goal of the project is to complete a cascaded geothermal system that generates green power for the local community, provides thermal energy to support greenhouse and aquaculture operation, provide sustainable thermal energy for residential units, and eliminate the existing geothermal discharge to a local river. NOTE: This EA has been cancelled.

  2. DOE 2009 Geothermal Risk Analysis: Methodology and Results (Presentation)

    SciTech Connect (OSTI)

    Young, K. R.; Augustine, C.; Anderson, A.

    2010-02-01

    This presentation summarizes the methodology and results for a probabilistic risk analysis of research, development, and demonstration work-primarily for enhanced geothermal systems (EGS)-sponsored by the U.S. Department of Energy Geothermal Technologies Program.

  3. National Geothermal Data System: Interactive Assessment of Geothermal Energy Potential in the U.S.

    SciTech Connect (OSTI)

    Allison, Lee; Richard, Stephen; Clark, Ryan; Patten, Kim; Love, Diane; Coleman, Celia; Chen, Genhan; Matti, Jordan; Pape, Estelle; Musil, Leah

    2012-01-30

    Geothermal-relevant geosciences data from all 50 states (www.stategeothermaldata.org), federal agencies, national labs, and academic centers are being digitized and linked in a distributed online network via the U.S. Department of Energy-funded National Geothermal Data System (NGDS) to foster geothermal energy exploration and development through use of interactive online ‘mashups,’data integration, and applications. Emphasis is first to make as much information as possible accessible online, with a long range goal to make data interoperable through standardized services and interchange formats. An initial set of thirty geoscience data content models is in use or under development to define a standardized interchange format: aqueous chemistry, borehole temperature data, direct use feature, drill stem test, earthquake hypocenter, fault feature, geologic contact feature, geologic unit feature, thermal/hot spring description, metadata, quaternary fault, volcanic vent description, well header feature, borehole lithology log, crustal stress, gravity, heat flow/temperature gradient, permeability, and feature descriptions data like developed geothermal systems, geologic unit geothermal properties, permeability, production data, rock alteration description, rock chemistry, and thermal conductivity. Map services are also being developed for isopach maps, aquifer temperature maps, and several states are working on geothermal resource overview maps. Content models are developed preferentially from existing community use in order to encourage widespread adoption and promulgate minimum metadata quality standards. Geoscience data and maps from other NGDS participating institutions, or “nodes” (USGS, Southern Methodist University, Boise State University Geothermal Data Coalition) are being supplemented with extensive land management and land use resources from the Western Regional Partnership (15 federal agencies and 5 Western states) to provide access to a comprehensive, holistic set of data critical to geothermal energy development. As of September 2011, we have over 34,000 records registered in the system catalog, and 234,942 data resources online, along with scores of Web services to deliver integrated data to the desktop for free downloading or online use. The data exchange mechanism is built on the U.S. Geoscience Information Network (USGIN, http://usgin.org and http://lab.usgin.org) protocols and standards developed as a partnership of the Association of American State Geologists (AASG) and U.S. Geological Survey.

  4. Development of a Geological and GeomechanicalFramework for the Analysis of MEQ in EGS Experiments

    Broader source: Energy.gov [DOE]

    Project objective: to develop a framework for investigating processes that contribute to the occurrence of seismicity in enhanced geothermal systems with particular reference to the Newberry demonstration experiment and the potential Geysers EGS demonstration experiment.

  5. Improved Microseismicity Detection During Newberry EGS Stimulations

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Templeton, Dennise

    Effective enhanced geothermal systems (EGS) require optimal fracture networks for efficient heat transfer between hot rock and fluid. Microseismic mapping is a key tool used to infer the subsurface fracture geometry. Traditional earthquake detection and location techniques are often employed to identify microearthquakes in geothermal regions. However, most commonly used algorithms may miss events if the seismic signal of an earthquake is small relative to the background noise level or if a microearthquake occurs within the coda of a larger event. Consequently, we have developed a set of algorithms that provide improved microearthquake detection. Our objective is to investigate the microseismicity at the DOE Newberry EGS site to better image the active regions of the underground fracture network during and immediately after the EGS stimulation. Detection of more microearthquakes during EGS stimulations will allow for better seismic delineation of the active regions of the underground fracture system. This improved knowledge of the reservoir network will improve our understanding of subsurface conditions, and allow improvement of the stimulation strategy that will optimize heat extraction and maximize economic return.

  6. Improved Microseismicity Detection During Newberry EGS Stimulations

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Templeton, Dennise

    2013-10-01

    Effective enhanced geothermal systems (EGS) require optimal fracture networks for efficient heat transfer between hot rock and fluid. Microseismic mapping is a key tool used to infer the subsurface fracture geometry. Traditional earthquake detection and location techniques are often employed to identify microearthquakes in geothermal regions. However, most commonly used algorithms may miss events if the seismic signal of an earthquake is small relative to the background noise level or if a microearthquake occurs within the coda of a larger event. Consequently, we have developed a set of algorithms that provide improved microearthquake detection. Our objective is to investigate the microseismicity at the DOE Newberry EGS site to better image the active regions of the underground fracture network during and immediately after the EGS stimulation. Detection of more microearthquakes during EGS stimulations will allow for better seismic delineation of the active regions of the underground fracture system. This improved knowledge of the reservoir network will improve our understanding of subsurface conditions, and allow improvement of the stimulation strategy that will optimize heat extraction and maximize economic return.

  7. Improved Microseismicity Detection During Newberry EGS Stimulations

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Templeton, Dennise

    2013-11-01

    Effective enhanced geothermal systems (EGS) require optimal fracture networks for efficient heat transfer between hot rock and fluid. Microseismic mapping is a key tool used to infer the subsurface fracture geometry. Traditional earthquake detection and location techniques are often employed to identify microearthquakes in geothermal regions. However, most commonly used algorithms may miss events if the seismic signal of an earthquake is small relative to the background noise level or if a microearthquake occurs within the coda of a larger event. Consequently, we have developed a set of algorithms that provide improved microearthquake detection. Our objective is to investigate the microseismicity at the DOE Newberry EGS site to better image the active regions of the underground fracture network during and immediately after the EGS stimulation. Detection of more microearthquakes during EGS stimulations will allow for better seismic delineation of the active regions of the underground fracture system. This improved knowledge of the reservoir network will improve our understanding of subsurface conditions, and allow improvement of the stimulation strategy that will optimize heat extraction and maximize economic return.

  8. Development of an Advanced Stimulation / Production Predictive Simulator for Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Pritchett, John W.

    2015-04-15

    There are several well-known obstacles to the successful deployment of EGS projects on a commercial scale, of course. EGS projects are expected to be deeper, on the average, than conventional “natural” geothermal reservoirs, and drilling costs are already a formidable barrier to conventional geothermal projects. Unlike conventional resources (which frequently announce their presence with natural manifestations such as geysers, hot springs and fumaroles), EGS prospects are likely to appear fairly undistinguished from the earth surface. And, of course, the probable necessity of fabricating a subterranean fluid circulation network to mine the heat from the rock (instead of simply relying on natural, pre-existing permeable fractures) adds a significant degree of uncertainty to the prospects for success. Accordingly, the basic motivation for the work presented herein was to try to develop a new set of tools that would be more suitable for this purpose. Several years ago, the Department of Energy’s Geothermal Technologies Office recognized this need and funded a cost-shared grant to our company (then SAIC, now Leidos) to partner with Geowatt AG of Zurich, Switzerland and undertake the development of a new reservoir simulator that would be more suitable for EGS forecasting than the existing tools. That project has now been completed and a new numerical geothermal reservoir simulator has been developed. It is named “HeatEx” (for “Heat Extraction”) and is almost completely new, although its methodology owes a great deal to other previous geothermal software development efforts, including Geowatt’s “HEX-S” code, the STAR and SPFRAC simulators developed here at SAIC/Leidos, the MINC approach originally developed at LBNL, and tracer analysis software originally formulated at INEL. Furthermore, the development effort was led by engineers with many years of experience in using reservoir simulation software to make meaningful forecasts for real geothermal projects, not just software designers. It is hoped that, as a result, HeatEx will prove useful during the early stages of the development of EGS technology. The basic objective was to design a tool that could use field data that are likely to become available during the early phases of an EGS project (that is, during initial reconnaissance and fracture stimulation operations) to guide forecasts of the longer-term behavior of the system during production and heat-mining.

  9. 2015 Annual Report, Geothermal Technologies Office | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Annual Report, Geothermal Technologies Office 2015 Annual Report, Geothermal Technologies Office 2015 Annual Report, Geothermal Technologies Office The Energy Department's 2015 Geothermal Technologies Office (GTO) Annual Report recognizes advances in transformative, high-risk/high-reward science and engineering from the Energy Department's geothermal portfolio. This issue highlights project successes in all of our program areas - EGS, Hydrothermal, Low-Temperature, and Systems Analysis - which

  10. Simulation of Enhanced Geothermal Systems: A Benchmarking and Code Intercomparison Study

    SciTech Connect (OSTI)

    Scheibe, Timothy D.; White, Mark D.; White, Signe K.; Sivaramakrishnan, Chandrika; Purohit, Sumit; Black, Gary D.; Podgorney, Robert; Boyd, Lauren W.; Phillips, Benjamin R.

    2013-06-30

    Numerical simulation codes have become critical tools for understanding complex geologic processes, as applied to technology assessment, system design, monitoring, and operational guidance. Recently the need for quantitatively evaluating coupled Thermodynamic, Hydrologic, geoMechanical, and geoChemical (THMC) processes has grown, driven by new applications such as geologic sequestration of greenhouse gases and development of unconventional energy sources. Here we focus on Enhanced Geothermal Systems (EGS), which are man-made geothermal reservoirs created where hot rock exists but there is insufficient natural permeability and/or pore fluids to allow efficient energy extraction. In an EGS, carefully controlled subsurface fluid injection is performed to enhance the permeability of pre-existing fractures, which facilitates fluid circulation and heat transport. EGS technologies are relatively new, and pose significant simulation challenges. To become a trusted analytical tool for EGS, numerical simulation codes must be tested to demonstrate that they adequately represent the coupled THMC processes of concern. This presentation describes the approach and status of a benchmarking and code intercomparison effort currently underway, supported by the U. S. Department of Energys Geothermal Technologies Program. This study is being closely coordinated with a parallel international effort sponsored by the International Partnership for Geothermal Technology (IPGT). We have defined an extensive suite of benchmark problems, test cases, and challenge problems, ranging in complexity and difficulty, and a number of modeling teams are applying various simulation tools to these problems. The descriptions of the problems and modeling results are being compiled using the Velo framework, a scientific workflow and data management environment accessible through a simple web-based interface.

  11. EERE Success Story-California: Next-Generation Geothermal Demonstration

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Launched | Department of Energy Next-Generation Geothermal Demonstration Launched EERE Success Story-California: Next-Generation Geothermal Demonstration Launched August 21, 2013 - 12:00am Addthis At the outer edges of the largest operating geothermal field in the world, the Energy Department and project partner Calpine Corporation achieved the nation's first sustained enhanced geothermal system (EGS) demonstration success in 2012. The Geysers EGS Demonstration project successfully created a

  12. High Temperature, High Pressure Devices for Zonal Isolation in Geothermal

    Broader source: Energy.gov (indexed) [DOE]

    Wells | Department of Energy High Temperature, High Pressure Devices for Zonal Isolation in Geothermal Wells PDF icon fabian_ctd_ zonal_isolation_peer2013.pdf More Documents & Publications High Temperature, High Pressure Devices for Zonal Isolation in Geothermal Wells track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review Complete Fiber/Copper Cable Solution for Long-Term Temperature and Pressure Measurement in Supercritical Reservoirs and EGS Wells

  13. Calc-silicate mineralization in active geothermal systems

    SciTech Connect (OSTI)

    Bird, D.K.; Schiffman, P.; Elders, W.A.; Williams, A.E.; McDowell, S.D.

    1983-01-01

    The detailed study of calc-silicate mineral zones and coexisting phase relations in the Cerro Prieto geothermal system were used as examples for thermodynamic evaluation of phase relations among minerals of variable composition and to calculate the chemical characteristics of hydrothermal solutions compatible with the observed calc-silicate assemblages. In general there is a close correlation between calculated and observed fluid compositions. Calculated fugacities of O{sub 2} at about 320{degrees}C in the Cerro Prieto geothermal system are about five orders of magnitude less than that at the nearby Salton Sea geothermal system. This observation is consistent with the occurrence of Fe{sup 3+} rich epidotes in the latter system and the presence of prehnite at Cerro Prieto.

  14. Fluid Imaging of Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objectives: Attempting to Image EGS Fracture & Fluid Networks; Employing joint Geophysical Imaging Technologies.

  15. Newberry EGS Demonstration

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... geophones * 7 surface geophones * Real-time telemetry Strong motion sensor * near Paulina Lake Visitor Center (NNVM) 8 | US DOE Geothermal Office eere.energy.gov MSA ...

  16. Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Power Systems | Department of Energy Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's GREET model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies. PDF icon

  17. Residential Vertical Geothermal Heat Pump System Models: Calibration to Data:

    SciTech Connect (OSTI)

    Thornton, Jeff W.; McDowell, T. P.; Shonder, John A; Hughes, Patrick; Pahud, D.; Hellstrom, G.

    1997-06-01

    A detailed component-based simulation model of a geothermal heat pump system has been calibrated to monitored data taken from a family housing unit located at Fort Polk, Louisiana. The simulation model represents the housing unit, geothermal heat pump, ground heat exchanger, thermostat, blower, and ground-loop pump. Each of these component models was 'tuned' to better match the measured data from the site. These tuned models were then interconnect to form the system model. The system model was then exercised in order to demonatrate its capabilities.

  18. Residential vertical geothermal heat pump system models: Calibration to data

    SciTech Connect (OSTI)

    Thornton, J.W.; McDowell, T.P.; Shonder, J.A.; Hughes, P.J.; Pahud, D.; Hellstroem, G.A.J.

    1997-12-31

    A detailed component-based simulation model of a geothermal heat pump system has been calibrated to monitored data taken from a family housing unit located at Fort Polk, Louisiana. The simulation model represents the housing unit, geothermal heat pump, ground heat exchanger, thermostat, blower, and ground-loop pump. Each of these component models was tuned to better match the measured data from the site. These tuned models were then interconnected to form the system model. The system model was then exercised in order to demonstrate its capabilities.

  19. Teleseismic-Seismic Monitoring At Dixie Valley Geothermal Area...

    Open Energy Info (EERE)

    H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Ileana M....

  20. Numerical Modeling At Dixie Valley Geothermal Area (Iovenitti...

    Open Energy Info (EERE)

    H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Christoph...

  1. Gas Flux Sampling At Dixie Valley Geothermal Area (Iovenitti...

    Open Energy Info (EERE)

    H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Additional...

  2. Ground Magnetics At Dixie Valley Geothermal Area (Iovenitti,...

    Open Energy Info (EERE)

    H. Ibser, Jennifer Lewicki, B. Mack. Kennedy, Michael Swyer (2013) Egs Exploration Methodology Project Using the Dixie Valley Geothermal System, Nevada, Status Update Additional...

  3. Energy Returned On Investment of Engineered Geothermal Systems Annual Report FY2011

    SciTech Connect (OSTI)

    Mansure, A.J.

    2011-12-31

    Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. For geothermal electric power generation, EROI is determined by the electricity delivered to the consumer compared to the energy consumed to construct, operate, and decommission the facility. Critical factors in determining the EROI of Engineered Geothermal Systems (EGS) are examined in this work. These include the input energy embodied into the system. The embodied energy includes the energy contained in the materials, as well as, that consumed in each stage of manufacturing from mining the raw materials to assembling the finished plant. Also critical are the system boundaries and value of the energy - heat is not as valuable as electrical energy.

  4. Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This objective of this project is to develop an innovative approach to estimate fracture surface area and spacing through interpretation of signals of natural chemical and isotopic tracers.

  5. State Geological Survey Contributions to the National Geothermal Data System- Final Technical Report

    SciTech Connect (OSTI)

    Allison, M. Lee; Richard, Stephen M.

    2015-03-13

    The State Geological Survey Contributions to the National Geothermal Data System project is built on the work of the project managed by Boise State University to design and build the National Geothermal Data System, by deploying it nationwide and populating it with data principally from State Geological Surveys through collaboration with the Association of American State Geologists (AASG). This project subsequently incorporated the results of the design-build and other DOE-funded projects in support of the NGDS. The NGDS (www.geothermaldata.org) provides free open access to millions of data records, images, maps, and reports, sharing relevant geoscience, production, and land use data in 30+ categories to propel geothermal development and production in the U.S. NGDS currently serves information gathered from hundreds of the U.S. Department of Energy sponsored development and research projects and geologic data feeds from 60+ data providers throughout all 50 states. These data are relevant to geothermal energy exploration and development, but also have broad applicability in other areas including natural resources (e.g., energy, minerals, water), natural hazards, and land use and management.

  6. Multiparameter Fiber Optic Sensing System for Monitoring Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objectives: Demonstrate reliability of fiber and distributed temperature; strain and vibration sensing sub-systems for EGS at 374ºC and 220 bar in the presence of hydrogen. Develop a high accuracy point pressure gauge and distributed pressure sensor to meet EGS requirements.

  7. Mathematical modeling of the behavior of geothermal systems under exploitation

    SciTech Connect (OSTI)

    Bodvarsson, G.S.

    1982-01-01

    Analytical and numerical methods have been used in this investigation to model the behavior of geothermal systems under exploitation. The work is divided into three parts: (1) development of a numerical code, (2) theoretical studies of geothermal systems, and (3) field applications. A new single-phase three-dimensional simulator, capable of solving heat and mass flow problems in a saturated, heterogeneous porous or fractured medium has been developed. The simulator uses the integrated finite difference method for formulating the governing equations and an efficient sparse solver for the solution of the linearized equations. In the theoretical studies, various reservoir engineering problems have been examined. These include (a) well-test analysis, (b) exploitation strategies, (c) injection into fractured rocks, and (d) fault-charged geothermal reservoirs.

  8. National Geothermal Data System Demo 01-28-14 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Demo 01-28-14 National Geothermal Data System Demo 01-28-14 PDF icon ngds-webinar-azgs.pdf More Documents & Publications How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" State Geological Survey Contributions to the National Geothermal Data System AASG State Geological Survey

  9. IEA-GIA ExCo - National Geothermal Data System and Online Tools |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy IEA-GIA ExCo - National Geothermal Data System and Online Tools IEA-GIA ExCo - National Geothermal Data System and Online Tools National Geothermal Data System presentation by Jay Nathwani at the September 30, 2011 IEA-GIA ExCo conference in London. PDF icon gtp_iea-gia_presentation_nathwani_9-30-11.pdf More Documents & Publications International Partnership for Geothermal Technology - 2012 Peer Review Presentation Innovative Exploration Technologies Subprogram

  10. GTP Adds Meeting on the National Geothermal Data System Project to Peer Review

    Office of Energy Efficiency and Renewable Energy (EERE)

    The design of the National Geothermal Data System (NGDS) was initiated in early fiscal year 2010 to address capturing and providing geothermal data to users -- researchers, industry, state and federal agencies, and the public.

  11. Characterization of EGS Fracture Network Lifecycles

    SciTech Connect (OSTI)

    Gillian R. Foulger

    2008-03-31

    Geothermal energy is relatively clean, and is an important non-hydrocarbon source of energy. It can potentially reduce our dependence on fossil fuels and contribute to reduction in carbon emissions. High-temperature geothermal areas can be used for electricity generation if they contain permeable reservoirs of hot water or steam that can be extracted. The biggest challenge to achieving the full potential of the nations resources of this kind is maintaining and creating the fracture networks required for the circulation, heating, and extraction of hot fluids. The fundamental objective of the present research was to understand how fracture networks are created in hydraulic borehole injection experiments, and how they subsequently evolve. When high-pressure fluids are injected into boreholes in geothermal areas, they flow into hot rock at depth inducing thermal cracking and activating critically stressed pre-existing faults. This causes earthquake activity which, if monitored, can provide information on the locations of the cracks formed, their time-development and the type of cracking underway, e.g., whether shear movement on faults occurred or whether cracks opened up. Ultimately it may be possible to monitor the critical earthquake parameters in near-real-time so the information can be used to guide the hydraulic injection while it is in progress, e.g., how to adjust factors such as injectate pressure, volume and temperature. In order to achieve this, it is necessary to mature analysis techniques and software that were, at the start of this project, in an embryonic developmental state. Task 1 of the present project was to develop state-of-the-art techniques and software for calculating highly accurate earthquake locations, earthquake source mechanisms (moment tensors) and temporal changes in reservoir structure. Task 2 was to apply the new techniques to hydrofracturing (Enhanced Geothermal Systems, or EGS) experiments performed at the Coso geothermal field, in order to enhance productivity there. Task 3 was to interpret the results jointly with other geological information in order to provide a consistent physical model. All of the original goals of the project have been achieved. An existing program for calculating accurate relative earthquake locations has been enhanced by a technique to improve the accuracy of earthquake arrival-time measurements using waveform cross-correlation. Error analysis has been added to pre-existing moment tensor software. New seismic tomography software has been written to calculate changes in structure that could be due, for example, to reservoir depletion. Data processing procedures have been streamlined and web tools developed for rapid dissemination of the results, e.g., to on-site operations staff. Application of the new analysis tools to the Coso geothermal field has demonstrated the effective use of the techniques and provided important case histories to guide the style of future applications. Changes in reservoir structure with time are imaged throughout the upper 3 km, identifying the areas where large volumes of fluid are being extracted. EGS hydrofracturing experiments in two wells stimulated a nearby fault to the south that ruptured from south to north. The position of this fault could be precisely mapped and its existence was confirmed by surface mapping and data from a borehole televiewer log. No earthquakes occurred far north of the injection wells, suggesting that the wells lie near the northern boundary of the region of critically stressed faults. Minor en-echelon faults were also activated. Significant across-strike fluid flow occurred. The faults activated had significant crack-opening components, indicating that the hydraulic fracturing created open cavities at depth. The fluid injection changed the local stress field orientation and thus the mode of failure was different from the normal background. Initial indications are that the injections modulated stress release, seismicity and natural fracture system evolution for periods of up to months. The research demon

  12. Southwest Alaska Regional Geothermal Energy Project | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Southwest Alaska Regional Geothermal Energy Project Southwest Alaska Regional Geothermal Energy Project Engineered Geothermal Systems Demonstration Projects. Project objectives: ...

  13. Developing a 300C Analog Tool for EGS

    SciTech Connect (OSTI)

    Normann, Randy

    2015-03-23

    This paper covers the development of a 300°C geothermal well monitoring tool for supporting future EGS (enhanced geothermal systems) power production. This is the first of 3 tools planed. This is an analog tool designed for monitoring well pressure and temperature. There is discussion on 3 different circuit topologies and the development of the supporting surface electronics and software. There is information on testing electronic circuits and component. One of the major components is the cable used to connect the analog tool to the surface.

  14. Decision Analysis for EGS

    Broader source: Energy.gov [DOE]

    Project objectives: DEVELOPMENT OF ANALYSIS TOOLS TO ASSESS: Uncertainties associated with exploration for EGS; Uncertainties associated with development of EGS; Uncertainties associated with operation of EGS.

  15. Michrohole Arrays Drilled with Advanced Abrasive Slurry Jet Technology to Efficiently Exploit Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Oglesby, Kenneth; Finsterle, Stefan; Zhang, Yingqi; Pan, Lehua; Dobson, Parick; Mohan, Ram; Shoham, Ovadia; Felber, Betty; Rychel, Dwight

    2014-03-12

    This project had two major areas of research for Engineered/ Enhanced Geothermal System (EGS) development - 1) study the potential benefits from using microholes (i.e., bores with diameters less than 10.16 centimeters/ 4 inches) and 2) study FLASH ASJ to drill/ install those microbores between a well and a fracture system. This included the methods and benefits of drilling vertical microholes for exploring the EGS reservoir and for installing multiple (forming an array of) laterals/ directional microholes for creating the in-reservoir heat exchange flow paths. Significant benefit was found in utilizing small microbore sized connecting bores for EGS efficiency and project life. FLASH ASJ was deemed too complicated to optimally work in such deep reservoirs at this time.

  16. Geographic Information System At Northern Basin & Range Region...

    Open Energy Info (EERE)

    conventional and EGS capable geothermal systems by analyzing regional data in a GIS. Digital geothermal data will be made available to industry and researchers on a web site....

  17. Geographic Information System At Central Nevada Seismic Zone...

    Open Energy Info (EERE)

    conventional and EGS capable geothermal systems by analyzing regional data in a GIS. Digital geothermal data will be made available to industry and researchers on a web site....

  18. Geographic Information System At Nw Basin & Range Region (Laney...

    Open Energy Info (EERE)

    conventional and EGS capable geothermal systems by analyzing regional data in a GIS. Digital geothermal data will be made available to industry and researchers on a web site....

  19. EGS Success Stories | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    University under the direction of Dr. Roland Horne is advancing the application of nanotechnology in determining fluid flow through enhanced geothermal system reservoirs at depth....

  20. Appendix F: GPRA05 Geothermal Technologies Program documentation

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The primary goal of the Geothermal Technologies Program is to reduce the cost of geothermal generation technologies, including both conventional and enhanced geothermal systems (EGS). Estimating the GPRA benefits involves projecting the market share for these technologies based on their economic and environmental characteristics.

  1. Structural Orientations Adjacent to Some Colorado Geothermal Systems

    SciTech Connect (OSTI)

    Richard,

    2012-02-01

    Citation Information: Originator: Geothermal Development Associates, Reno, Nevada Publication Date: 2012 Title: Structural Data Edition: First Publication Information: Publication Place: Reno Nevada Publisher: Geothermal Development Associates, Reno, Nevada Description: Structural orientations (fractures, joints, faults, lineaments, bedding orientations, etc.) were collected with a standard Brunton compass during routine field examinations of geothermal phenomena in Colorado. Often multiple orientations were taken from one outcrop. Care was taken to ensure outcrops were "in place". Point data was collected with a hand-held GPS unit. The structural data is presented both as standard quadrant measurements and in format suitable for ESRI symbology Spatial Domain: Extent: Top: 4491528.924999 m Left: 207137.983196 m Right: 432462.310324 m Bottom: 4117211.772001 m Contact Information: Contact Organization: Geothermal Development Associates, Reno, Nevada Contact Person: Richard Rick Zehner Address: 3740 Barron Way City: Reno State: NV Postal Code: 89511 Country: USA Contact Telephone: 775-737-7806 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System 1984 (WGS 1984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

  2. High Temperature, High Pressure Devices for Zonal Isolation in Geothermal Wells

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Design, demonstrate, and qualify high-temperature high pressure zonal isolation devices compatible with the high temperature downhole Enhanced Geothermal Systems (EGS) environment.

  3. Multiparameter fiber optic sensing system for monitoring enhanced geothermal systems

    SciTech Connect (OSTI)

    William A. Challener

    2014-12-04

    The goal of this project was to design, fabricate and test an optical fiber cable which supports multiple sensing modalities for measurements in the harsh environment of enhanced geothermal systems. To accomplish this task, optical fiber was tested at both high temperatures and strains for mechanical integrity, and in the presence of hydrogen for resistance to darkening. Both single mode (SM) and multimode (MM) commercially available optical fiber were identified and selected for the cable based on the results of these tests. The cable was designed and fabricated using a tube-within-tube construction containing two MM fibers and one SM fiber, and without supporting gel that is not suitable for high temperature environments. Commercial fiber optic sensing instruments using Raman DTS (distributed temperature sensing), Brillouin DTSS (distributed temperature and strain sensing), and Raleigh COTDR (coherent optical time domain reflectometry) were selected for field testing. A microelectromechanical systems (MEMS) pressure sensor was designed, fabricated, packaged, and calibrated for high pressure measurements at high temperatures and spliced to the cable. A fiber Bragg grating (FBG) temperature sensor was also spliced to the cable. A geothermal well was selected and its temperature and pressure were logged. The cable was then deployed in the well in two separate field tests and measurements were made on these different sensing modalities. Raman DTS measurements were found to be accurate to ±5°C, even with some residual hydrogen darkening. Brillouin DTSS measurements were in good agreement with the Raman results. The Rayleigh COTDR instrument was able to detect some acoustic signatures, but was generally disappointing. The FBG sensor was used to determine the effects of hydrogen darkening, but drift over time made it unreliable as a temperature or pressure sensor. The MEMS sensor was found to be highly stable and accurate to better than its 0.1% calibration.

  4. New Geothermal Data System Could Open Up Clean-Energy Reserves

    Broader source: Energy.gov [DOE]

    New geothermal data could open up clean energy reserves nationwide. Scientific American reported that the National Geothermal Data System is helping to isolate geothermal prospects, with the goal of fully profiling geologic and geophysical aspects of these deep energy reserves, which will reduce costly investment by better targeting wells.

  5. Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2004-12-15

    ''Hidden'' geothermal systems are those systems above which hydrothermal surface features (e.g., hot springs, fumaroles, elevated ground temperatures, hydrothermal alteration) are lacking. Emissions of moderate to low solubility gases (e.g., CO2, CH4, He) may be one of the primary near-surface signals from these systems. Detection of anomalous gas emissions related to hidden geothermal systems may therefore be an important tool to discover new geothermal resources. This study investigates the potential for CO2 detection and monitoring in the subsurface and above ground in the near-surface environment to serve as a tool to discover hidden geothermal systems. We focus the investigation on CO2 due to (1) its abundance in geothermal systems, (2) its moderate solubility in water, and (3) the wide range of technologies available to monitor CO2 in the near-surface environment. However, monitoring in the near-surface environment for CO2 derived from hidden geothermal reservoirs is complicated by the large variation in CO2 fluxes and concentrations arising from natural biological and hydrologic processes. In the near-surface environment, the flow and transport of CO2 at high concentrations will be controlled by its high density, low viscosity, and high solubility in water relative to air. Numerical simulations of CO2 migration show that CO2 concentrations can reach very high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, surface winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are primarily controlled by CO2 uptake by photosynthesis, production by root respiration, and microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include (1) the infrared gas analyzer (IRGA) for measurement of concentrations at point locations, (2) the accumulation chamber (AC) method for measuring soil CO2 fluxes at point locations, (3) the eddy covariance (EC) method for measuring net CO2 flux over a given area, (4) hyperspectral imaging of vegetative stress resulting from elevated CO2 concentrations, and (5) light detection and ranging (LIDAR) that can measure CO2 concentrations over an integrated path. Technologies currently in developmental stages that have the potential to be used for CO2 monitoring include tunable lasers for long distance integrated concentration measurements and micro-electronic mechanical systems (MEMS) that can make widespread point measurements. To address the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring methodologies with statistical analysis and modeling strategies. Within the area targeted for geothermal exploration, point measurements of soil CO2 fluxes and concentrations using the AC method and a portable IRGA, respectively, and measurements of net surface flux using EC should be made. Also, the natural spatial and temporal variability of surface CO2 fluxes and subsurface CO2 concentrations should be quantified within a background area with similar geologic, climatic, and ecosystem characteristics to the area targeted for geothermal exploration. Statistical analyses of data collected from both areas should be used to guide sampling strategy, discern spatial patterns that may be indicative of geothermal CO2 emissions, and assess the presence (or absence) of geothermal CO2 within the natural background variability with a desired confidence level. Once measured CO2 concentrations and fluxes have been determined to be of anomalous geothermal origin with high confidence, more expensive vertical subsurface gas sampling and chemical and isotopic analyses can be undertaken. Integrated analysis of all measurements will determine definitively if CO2 derived from a deep geothermal source is present, and if so, the spatial extent of the anomaly. The appropriateness of further geophysical measurements, installation of deep wells, and geochemical analyses of deep fluids can then be decided based on the results of the near surface CO2 monitoring program.

  6. Community Geothermal Technology Program: Bottom heating system using geothermal power for propagation. Final report, Phases 1 and 2

    SciTech Connect (OSTI)

    Downing, J.C.

    1990-01-01

    The objective is to develop and study a bottom-heating system in a greenhouse utilizing geothermal energy to aid germination and speed growth of palms. Source of heat was geothermal brine from HGP-A well. The project was successful; the heat made a dramatic difference with certain varieties, such as Areca catechu (betelnut) with 82% germination with heat, zero without. For other varieties, germination rates were much closer. Quality of seed is important. Tabs, figs.

  7. Overview Of The Lake City, California Geothermal System | Open...

    Open Energy Info (EERE)

    : GRC; p. () Related Geothermal Exploration Activities Activities (1) Geothermal Literature Review At Lake City Hot Springs Area (Benoit, Et Al., 2004) Areas (1) Lake City Hot...

  8. Tectonic & Structural Controls of Great Basin Geothermal Systems...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Terranes track 2: hydrothermal | geothermal 2015 peer review Finding Large Aperture Fractures in Geothermal Resource Areas Using a Three-Component Long-Offset Surface Seismic ...

  9. Geophysical Characterization of a Geothermal System Neal Hot...

    Open Energy Info (EERE)

    (Colwell, Et Al., 2012) Micro-Earthquake At Neal Hot Springs Geothermal Area (Nichols & Cole, 2010) Paleomagnetic Measurements At Neal Hot Springs Geothermal Area (London, 2011)...

  10. Low-Temperature Enhanced Geothermal System using Carbon Dioxide as the Heat-Transfer Fluid

    SciTech Connect (OSTI)

    Eastman, Alan D.

    2014-07-24

    This report describes work toward a supercritical CO2-based EGS system at the St. Johns Dome in Eastern Arizona, including a comprehensive literature search on CO2-based geothermal technologies, background seismic study, geological information, and a study of the possible use of metal oxide heat carriers to enhance the heat capacity of sCO2. It also includes cost estimates for the project, and the reasons why the project would probably not be cost effective at the proposed location.

  11. Geothermal Reservoir Dynamics - TOUGHREACT

    SciTech Connect (OSTI)

    Pruess, Karsten; Xu, Tianfu; Shan, Chao; Zhang, Yingqi; Wu,Yu-Shu; Sonnenthal, Eric; Spycher, Nicolas; Rutqvist, Jonny; Zhang,Guoxiang; Kennedy, Mack

    2005-03-15

    This project has been active for several years and has focused on developing, enhancing and applying mathematical modeling capabilities for fractured geothermal systems. The emphasis of our work has recently shifted towards enhanced geothermal systems (EGS) and hot dry rock (HDR), and FY05 is the first year that the DOE-AOP actually lists this project under Enhanced Geothermal Systems. Our overall purpose is to develop new engineering tools and a better understanding of the coupling between fluid flow, heat transfer, chemical reactions, and rock-mechanical deformation, to demonstrate new EGS technology through field applications, and to make technical information and computer programs available for field applications. The objectives of this project are to: (1) Improve fundamental understanding and engineering methods for geothermal systems, primarily focusing on EGS and HDR systems and on critical issues in geothermal systems that are difficult to produce. (2) Improve techniques for characterizing reservoir conditions and processes through new modeling and monitoring techniques based on ''active'' tracers and coupled processes. (3) Improve techniques for targeting injection towards specific engineering objectives, including maintaining and controlling injectivity, controlling non-condensable and corrosive gases, avoiding scale formation, and optimizing energy recovery. Seek opportunities for field testing and applying new technologies, and work with industrial partners and other research organizations.

  12. EERE Success Story-Optimizing Geothermal with Geo-Solar Hybrid Systems |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Optimizing Geothermal with Geo-Solar Hybrid Systems EERE Success Story-Optimizing Geothermal with Geo-Solar Hybrid Systems May 6, 2015 - 9:10am Addthis The Stillwater geothermal plant is the first hybrid solar geo facility in the nation. In 2014 Enel Green Power added 2 MW of concentrating solar power to the existing geothermal plant and solar photovoltaic field, for a total installed capacity of ~60 MW. Source: Enel Green Power North America The Stillwater geothermal

  13. EA-1897: AltaRock's Newberry Volcano EGS Demonstration near Bend, Oregon

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts of a proposal to create an Enhanced Geothermal Systems (EGS) Demonstration Project involving new technology, techniques, and advanced monitoring protocols for the purpose of testing the feasibility and viability of EGS for renewable energy production.

  14. Insights From Laboratory Experiments On Simulated Faults With Application To Fracture Evolution In Geothermal Systems

    SciTech Connect (OSTI)

    Stephen L. Karner, Ph.D

    2006-06-01

    Laboratory experiments provide a wealth of information related to mechanics of fracture initiation, fracture propagation processes, factors influencing fault strength, and spatio-temporal evolution of fracture properties. Much of the existing literature reports on laboratory studies involving a coupling of thermal, hydraulic, mechanical, and/or chemical processes. As these processes operate within subsurface environments exploited for their energy resource, laboratory results provide insights into factors influencing the mechanical and hydraulic properties of geothermal systems. I report on laboratory observations of strength and fluid transport properties during deformation of simulated faults. The results show systematic trends that vary with stress state, deformation rate, thermal conditions, fluid content, and rock composition. When related to geophysical and geologic measurements obtained from engineered geothermal systems (e.g. microseismicity, wellbore studies, tracer analysis), laboratory results provide a means by which the evolving thermal reservoir can be interpreted in terms of physico-chemical processes. For example, estimates of energy release and microearthquake locations from seismic moment tensor analysis can be related to strength variations observed from friction experiments. Such correlations between laboratory and field data allow for better interpretations about the evolving mechanical and fluid transport properties in the geothermal reservoir ultimately leading to improvements in managing the resource.

  15. Thermally conductive cementitious grout for geothermal heat pump systems

    DOE Patents [OSTI]

    Allan, Marita

    2001-01-01

    A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

  16. Economic Impact Analysis for EGS | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Project objective: To conduct an economic impact study for EGS and to develop a Geothermal Economics Calculator (GEC) tool to quantify (in economic terms) the potential job, energy and environmental impacts associated with electric power production from geothermal resources. PDF icon analysis_low_t_resources_peer2013.pdf More Documents & Publications Analysis of Low-Temperature Utilization of Geothermal Resources Canby Cascaded Geothermal Project Phase 1 Feasibility Novel Energy Conversion

  17. Geothermal br Resource br Area Geothermal br Resource br Area...

    Open Energy Info (EERE)

    Aluto Langano Geothermal Area Aluto Langano Geothermal Area East African Rift System Ethiopian Rift Valley Major Normal Fault Basalt MW K Amatitlan Geothermal Area Amatitlan...

  18. Desert Peak EGS Project

    Broader source: Energy.gov [DOE]

    Desert Peak EGS Project presentation at the April 2013 peer review meeting held in Denver, Colorado.

  19. SMU Geothermal Conference 2011 - Geothermal Technologies Program

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... Quality Geothermal Data Sets * Technology Assessment of Logging Techniques Systems ... Heat Recovery FOA Energy Efficiency & Renewable Energy eere.energy.gov Geothermal ...

  20. Switchgrass cultivar EG1102

    DOE Patents [OSTI]

    Bouton, Joseph H; Wood, Donald T

    2012-11-20

    A switchgrass cultivar designated EG1102 is disclosed. The invention relates to the seeds of switchgrass cultivar EG1102, to the plants of switchgrass EG1102, to plant parts of switchgrass cultivar EG1102 and to methods for producing a switchgrass plant produced by crossing switchgrass cultivar EG1102 with itself or with another switchgrass variety. The invention also relates to methods for producing a switchgrass plant containing in its genetic material one or more transgenes and to the transgenic switchgrass plants and plant parts produced by those methods. This invention also relates to switchgrass cultivars or breeding cultivars and plant parts derived from switchgrass variety EG1102, to methods for producing other switchgrass cultivars, lines or plant parts derived from switchgrass cultivar EG1102 and to the switchgrass plants, varieties, and their parts derived from use of those methods. The invention further relates to hybrid switchgrass seeds, plants and plant parts produced by crossing the cultivar EG1102 with another switchgrass cultivar.

  1. Switchgrass cultivar EG1101

    DOE Patents [OSTI]

    Bouton, Joseph H; Wood, Donald T

    2012-11-27

    A switchgrass cultivar designated EG1101 is disclosed. Also disclosed are seeds of switchgrass cultivar EG1101, plants of switchgrass EG1101, plant parts of switchgrass cultivar EG1101 and methods for producing a switchgrass plant produced by crossing switchgrass cultivar EG1101 with itself or with another switchgrass variety. Methods are also described for producing a switchgrass plant containing in its genetic material one or more transgenes and to the transgenic switchgrass plants and plant parts produced by those methods. Switchgrass cultivars or breeding cultivars and plant parts derived from switchgrass variety EG1101, methods for producing other switchgrass cultivars, lines or plant parts derived from switchgrass cultivar EG1101 and the switchgrass plants, varieties, and their parts derived from use of those methods are described herein. Hybrid switchgrass seeds, plants and plant parts produced by crossing the cultivar EG1101 with another switchgrass cultivar are also described.

  2. Optimizing parameters for predicting the geochemical behavior and performance of discrete fracture networks in geothermal systems

    Broader source: Energy.gov [DOE]

    Optimizing parameters for predicting the geochemical behavior and performance of discrete fracture networks in geothermal systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  3. Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems

    Broader source: Energy.gov [DOE]

    Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  4. National Geothermal Data System State Submissions by Date (Appendix A-1-a)

    SciTech Connect (OSTI)

    Love, Diane

    2015-12-20

    This multipaged spreadsheet tracks submissions of all data records to the State Geological Survey Contributions to the National Geothermal Data System by state and by type.

  5. Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural Analysis to Identify Hidden, High Enthalpy, Extensional Geothermal Systems

    Broader source: Energy.gov [DOE]

    Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural Analysis to Identify Hidden, High Enthalpy, Extensional Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  6. Reservoir-Stimulation Optimization with Operational Monitoring for Creation of Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Reservoir-Stimulation Optimization with Operational Monitoring for Creation of Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  7. Fracture Propagation and Permeability Change under Poro-thermoelastic Loads & Silica Reactivity in Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Ahmad Ghassemi

    2009-10-01

    Geothermal energy is recovered by circulating water through heat exchange areas within a hot rock mass. Geothermal reservoir rock masses generally consist of igneous and metamorphic rocks that have low matrix permeability. Therefore, cracks and fractures play a significant role in extraction of geothermal energy by providing the major pathways for fluid flow and heat exchange. Therefore, knowledge of the conditions leading to formation of fractures and fracture networks is of paramount importance. Furthermore, in the absence of natural fractures or adequate connectivity, artificial fractures are created in the reservoir using hydraulic fracturing. Multiple fractures are preferred because of the large size necessary when using only a single fracture. Although the basic idea is rather simple, hydraulic fracturing is a complex process involving interactions of high pressure fluid injections with a stressed hot rock mass, mechanical interaction of induced fractures with existing natural fractures, and the spatial and temporal variations of in-situ stress. As a result, it is necessary to develop tools that can be used to study these interactions as an integral part of a comprehensive approach to geothermal reservoir development, particularly enhanced geothermal systems. In response to this need we have developed advanced poro-thermo-chemo-mechanical fracture models for rock fracture research in support of EGS design. The fracture propagation models are based on a regular displacement discontinuity formulation. The fracture propagation studies include modeling interaction of induced fractures. In addition to the fracture propagation studies, two-dimensional solution algorithms have been developed and used to estimate the impact of pro-thermo-chemical processes on fracture permeability and reservoir pressure. Fracture permeability variation is studied using a coupled thermo-chemical model with quartz reaction kinetics. The model is applied to study quartz precipitation/dissolution, as well as the variation in fracture aperture and pressure. Also, a three-dimensional model of injection/extraction has been developed to consider the impact poro- and thermoelastic stresses on fracture slip and injection pressure. These investigations shed light on the processes involved in the observed phenomenon of injection pressure variation (e.g., in Coso), and allow the assessment of the potential of thermal and chemical stimulation strategies.

  8. Hybrid Cooling Systems for Low-Temperature Geothermal Power Production

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Hybrid Cooling Systems for Low-Temperature Geothermal Power Production Andrea Ashwood and Desikan Bharathan Technical Report NREL/TP-5500-48765 March 2011 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Hybrid Cooling Systems for

  9. Environmentally Friendly, Rheoreversible, Hydraulic-fracturing Fluids for Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Shao, Hongbo; Kabilan, Senthil; Stephens, Sean A.; Suresh, Niraj; Beck, Anthon NR; Varga, Tamas; Martin, Paul F.; Kuprat, Andrew P.; Jung, Hun Bok; Um, Wooyong; Bonneville, Alain; Heldebrant, David J.; Carroll, KC; Moore, Joseph; Fernandez, Carlos A.

    2015-07-01

    Cost-effective creation of high-permeability reservoirs inside deep crystalline bedrock is the primary challenge for the feasibility of enhanced geothermal systems (EGS). Current reservoir stimulation entails adverse environmental impacts and substantial economic costs due to the utilization of large volumes of water “doped” with chemicals including rheology modifiers, scale and corrosion inhibitors, biocides, friction reducers among others where, typically, little or no information of composition and toxicity is disclosed. An environmentally benign, CO2-activated, rheoreversible fracturing fluid has recently been developed that significantly enhances rock permeability at effective stress significantly lower than current technology. We evaluate the potential of this novel fracturing fluid for application on geothermal sites under different chemical and geomechanical conditions, by performing laboratory-scale fracturing experiments with different rock sources under different confining pressures, temperatures, and pH environments. The results demonstrate that CO2-reactive aqueous solutions of environmentally amenable Polyallylamine (PAA) represent a highly versatile fracturing fluid technology. This fracturing fluid creates/propagates fracture networks through highly impermeable crystalline rock at significantly lower effective stress as compared to control experiments where no PAA was present, and permeability enhancement was significantly increased for PAA compared to conventional hydraulic fracturing controls. This was evident in all experiments, including variable rock source/type, operation pressure and temperature (over the entire range for EGS applications), as well as over a wide range of formation-water pH values. This versatile novel fracturing fluid technology represents a great alternative to industrially available fracturing fluids for cost-effective and competitive geothermal energy production.

  10. Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation

    SciTech Connect (OSTI)

    Rose, Peter Eugene

    2013-04-15

    This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydraulic stimulation experiment. Phase 1 ended prematurely when the drill bit intersected a very permeable fault zone during the redrilling of target stimulation well 34-9RD2. A hydraulic stimulation was inadvertently achieved, however, since the flow of drill mud from the well into the formation created an earthquake swarm near the wellbore that was recorded, located, analyzed and interpreted by project seismologists. Upon completion of Phase 1, the project shifted focus to a new target well, which was located within the southwest compartment of the Coso geothermal field. Volume 2 describes the Phase 2 studies on the geomechanical, geophysical, hydraulic, and geochemical aspects of the reservoir in and around target-stimulation well 46A-19RD, which is the deepest and hottest well ever drilled at Coso. Its total measured depth exceeding 12,000 ft. It spite of its great depth, this well is largely impermeable below a depth of about 9,000 ft, thus providing an excellent target for stimulation. In order to prepare 46A-19RD for stimulation, however, it was necessary to pull the slotted liner. This proved to be unachievable under the budget allocated by the Coso Operating Company partners, and this aspect of the project was abandoned, ending the program at Coso. The program then shifted to the EGS project at Desert Peak, which had a goal similar to the one at Coso of creating an EGS on the periphery of an existing geothermal reservoir. Volume 3 describes the activities that the Coso team contributed to the Desert Peak project, focusing largely on a geomechanical investigation of the Desert Peak reservoir, tracer testing between injectors 21-2 and 22-22 and the field’s main producers, and the chemical stimulation of target well 27-15.

  11. Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation

    SciTech Connect (OSTI)

    Rose, Peter Eugene

    2013-04-15

    This report describes a 10-year DOE-funded project to design, characterize and create an Engineered Geothermal System (EGS) through a combination of hydraulic, thermal and chemical stimulation techniques. Volume 1 describes a four-year Phase 1 campaign, which focused on the east compartment of the Coso geothermal field. It includes a description of the geomechanical, geophysical, hydraulic, and geochemical studies that were conducted to characterize the reservoir in anticipation of the hydraulic stimulation experiment. Phase 1 ended prematurely when the drill bit intersected a very permeable fault zone during the redrilling of target stimulation well 34-9RD2. A hydraulic stimulation was inadvertently achieved, however, since the flow of drill mud from the well into the formation created an earthquake swarm near the wellbore that was recorded, located, analyzed and interpreted by project seismologists. Upon completion of Phase 1, the project shifted focus to a new target well, which was located within the southwest compartment of the Coso geothermal field. Volume 2 describes the Phase 2 studies on the geomechanical, geophysical, hydraulic, and geochemical aspects of the reservoir in and around target-stimulation well 46A-19RD, which is the deepest and hottest well ever drilled at Coso. Its total measured depth exceeding 12,000 ft. It spite of its great depth, this well is largely impermeable below a depth of about 9,000 ft, thus providing an excellent target for stimulation. In order to prepare 46A-19RD for stimulation, however, it was necessary to pull the slotted liner. This proved to be unachievable under the budget allocated by the Coso Operating Company partners, and this aspect of the project was abandoned, ending the program at Coso. The program then shifted to the EGS project at Desert Peak, which had a goal similar to the one at Coso of creating an EGS on the periphery of an existing geothermal reservoir. Volume 3 describes the activities that the Coso team contributed to the Desert Peak project, focusing largely on a geomechanical investigation of the Desert Peak reservoir, tracer testing between injectors 21-2 and 22-22 and the field’s main producers, and the chemical stimulation of target well 27-15.

  12. Recovery Act. Development and Validation of an Advanced Stimulation Prediction Model for Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Gutierrez, Marte

    2013-12-31

    This research project aims to develop and validate an advanced computer model that can be used in the planning and design of stimulation techniques to create engineered reservoirs for Enhanced Geothermal Systems. The specific objectives of the proposal are to; Develop a true three-dimensional hydro-thermal fracturing simulator that is particularly suited for EGS reservoir creation; Perform laboratory scale model tests of hydraulic fracturing and proppant flow/transport using a polyaxial loading device, and use the laboratory results to test and validate the 3D simulator; Perform discrete element/particulate modeling of proppant transport in hydraulic fractures, and use the results to improve understand of proppant flow and transport; Test and validate the 3D hydro-thermal fracturing simulator against case histories of EGS energy production; and Develop a plan to commercialize the 3D fracturing and proppant flow/transport simulator. The project is expected to yield several specific results and benefits. Major technical products from the proposal include; A true-3D hydro-thermal fracturing computer code that is particularly suited to EGS; Documented results of scale model tests on hydro-thermal fracturing and fracture propping in an analogue crystalline rock; Documented procedures and results of discrete element/particulate modeling of flow and transport of proppants for EGS applications; and Database of monitoring data, with focus of Acoustic Emissions (AE) from lab scale modeling and field case histories of EGS reservoir creation.

  13. Estimation and Analysis of Life Cycle Costs of Baseline EGS

    Broader source: Energy.gov [DOE]

    Project objective: To create the National Geothermal Data System (NGDS) comprised of a core and distributed network of databases and data sites that will comprise a federated system for acquisition, management, maintenance, and dissemination of geothermal and related data.

  14. Pinpointing America's Geothermal Resources with Open Source Data

    Broader source: Energy.gov [DOE]

    National Geothermal Data System addresses barriers to geothermal deployment by aggregating millions of geoscience datapoints and legacy geothermal research into a nationwide system that serves the geothermal community.

  15. Prediction of reinjection effects on the Cerro Prieto geothermal system

    SciTech Connect (OSTI)

    Tsang, C.F.; Mangold, D.C.; Doughty, C.; Lippmann, M.J.

    1982-08-10

    The response of the Cerro Prieto geothermal field to different reinjection schemes is predicted using a two-dimensional vertical reservoir model with single- or two-phase flow. The advance of cold fronts and pressure changes in the system associated with the inection operations are computed, taking into consideration the geologic characteristics of the field. The effects of well location, depth, and rates of injection are analyzed. Results indicate that significant pressure maintenance effects may be realized in a carefully designed reinjection operation.

  16. Geothermal pump down-hole energy regeneration system

    DOE Patents [OSTI]

    Matthews, Hugh B.

    1982-01-01

    Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a turbine motor for driving an electrical power generator at the earth 3 s surface, the solute bearing water being returned into the earth by a reinjection well. Efficiency of operation of the total system is increased by an arrangement of coaxial conduits for greatly reducing the flow of heat from the rising brine into the rising exhaust of the down-well turbine motor.

  17. Ball State University Completes Nation's Largest Ground-Source Geothermal System with Support from Recovery Act

    Broader source: Energy.gov [DOE]

    As part of the Obama Administration's all-of-the-above approach to American energy, the Energy Department today congratulated Ball State University for its campus-wide ground-source geothermal system, the nation's largest geothermal heating and cooling system.

  18. Ball State Completes Largest U.S. Ground-Source Geothermal System

    Broader source: Energy.gov [DOE]

    Ball State University has completed its campus-wide ground-source geothermal system, the nation's largest geothermal heating and cooling system, DOE announced on March 20. DOE played a part in the project by providing a $5 million grant through the American Recovery and Reinvestment Act.

  19. National Geothermal Data System Hub Deployment Timeline (Appendix E-1-d)

    SciTech Connect (OSTI)

    Caudill, Christy

    2015-12-20

    Excel spreadsheet describing activity, spending, and development for the four data hubs (Arizona Geoloical Survey, Kentucky Geological Survey, Illinois Geological Survey, and Nevada Bureau of Mines and Geology) serving data for the National Geothermal Data System under the State Contributions to the National Geothermal Data System Project.

  20. Parametric Analysis of the Factors Controlling the Costs of Sedimentary Geothermal Systems - Preliminary Results (Poster)

    SciTech Connect (OSTI)

    Augustine, C.

    2013-10-01

    Parametric analysis of the factors controlling the costs of sedimentary geothermal systems was carried out using a modified version of the Geothermal Electricity Technology Evaluation Model (GETEM). The sedimentary system modeled assumed production from and injection into a single sedimentary formation.

  1. Federal Geothermal Research Program Update - Fiscal Year 2004

    SciTech Connect (OSTI)

    Patrick Laney

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently possible or economical.

  2. Federal Geothermal Research Program Update Fiscal Year 2004

    SciTech Connect (OSTI)

    Not Available

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently possible or economical.

  3. Stanford Geothermal Workshop

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Timothy Reinhardt Acting Program Manager Systems Analysis and Low Temperature (SALT) Geothermal Technologies Office Geothermal Vision Study May 11th, 2015 Courtesy GRC Courtesy E ...

  4. Marketing the Klamath Falls Geothermal District Heating system

    SciTech Connect (OSTI)

    Rafferty, K.

    1993-06-01

    The new marketing strategy for the Klamath Falls system has concentrated on offering the customer an attractive and easy to understand rate structure, reduced retrofit cost and complexity for his building along with an attractive package of financing and tax credits. Initial retrofit costs and life-cycle cost analysis have been conducted on 22 buildings to date. For some, the retrofit costs are simply too high for the conversion to make sense at current geothermal rates. For many, however, the prospects are good. At this writing, two new customers are now connected and operating with 5 to 8 more buildings committed to connect this construction season after line extensions are completed. This represents nearly a 60% increase in the number of buildings connected to the system and a 40% increase in system revenue.

  5. El Centro/Superstition Hills Geothermal Project (2) | Open Energy...

    Open Energy Info (EERE)

    County, NV Geothermal Area Geothermal Region Geothermal Project Profile Developer Navy Geothermal Program Project Type Hydrothermal Systems GEA Development Phase Phase II -...

  6. Optimization of hybrid-water/air-cooled condenser in an enhanced turbine geothermal ORC system

    Broader source: Energy.gov [DOE]

    DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: To improve the efficiency and output variability of geothermal-based ORC power production systems with minimal water consumption by deploying: 1) a hybrid-water/air cooled condenser with low water consumption and 2) an enhanced turbine with high efficiency.

  7. Research Initiative Will Demonstrate Low Temperature Geothermal Electrical Power Generation Systems Using Oilfield Fluids

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO) is announcing a new collaboration with the Office of Fossil Energy (FE) to demonstrate the versatility, reliability, and deployment capabilities of low-temperature geothermal electrical power generation systems using co-produced water from oilfield operations at the Rocky Mountain Oilfield Testing Center (RMOTC) in Wyoming.

  8. Real-time fracture monitoring in Engineered Geothermal Systems with seismic waves

    SciTech Connect (OSTI)

    Jose A. Rial; Jonathan Lees

    2009-03-31

    As proposed, the main effort in this project is the development of software capable of performing real-time monitoring of micro-seismic activity recorded by an array of sensors deployed around an EGS. The main milestones are defined by the development of software to perform the following tasks: • Real-time micro-earthquake detection and location • Real-time detection of shear-wave splitting • Delayed-time inversion of shear-wave splitting These algorithms, which are discussed in detail in this report, make possible the automatic and real-time monitoring of subsurface fracture systems in geothermal fields from data collected by an array of seismic sensors. Shear wave splitting (SWS) is parameterized in terms of the polarization of the fast shear wave and the time delay between the fast and slow shear waves, which are automatically measured and stored. The measured parameters are then combined with previously measured SWS parameters at the same station and used to invert for the orientation (strike and dip) and intensity of cracks under that station. In addition, this grant allowed the collection of seismic data from several geothermal regions in the US (Coso) and Iceland (Hengill) to use in the development and testing of the software.

  9. Colorado Firm Develops Innovative Materials for Geothermal Systems...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    The company developed materials designed to create and conserve geothermal reservoirs in harsh down-hole environments to produce energy. Composite used an innovative polymer ...

  10. DOE and Partners Demonstrate Mobile Geothermal Power System at...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and gas sites to reduce costs for geothermal exploration, drilling, and infrastructure. ... Learn more about the PureCycle technology and about GTO's other projects. Addthis Related ...

  11. Mapping Fractures In The Medicine Lake Geothermal System | Open...

    Open Energy Info (EERE)

    geothermal resources in the Cascades Authors Steven Clausen, Michal Nemcok, Joseph Moore, Jeffrey Hulen and John Bartley Published GRC, 2006 DOI Not Provided Check for DOI...

  12. Geologic History of the Coso Geothermal System | Open Energy...

    Open Energy Info (EERE)

    presumably due to lower recharge rates. Authors Michael C. Adams, Joseph N. Moore, Steven Bjornstad and David I. Norman Conference World Geothermal Congress;...

  13. Strategies To Detect Hidden Geothermal Systems Based On Monitoring...

    Open Energy Info (EERE)

    techniques with statisticalanalysis and modeling. Authors Jennifer L. Lewicki and Curtis M. Oldenburg Published Journal Geothermal Technologies Legacy Collection, 2005 DOI Not...

  14. Optimizing Geothermal with Geo-Solar Hybrid Systems | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    geothermal plant and solar photovoltaic field, for a total installed capacity of 60 MW. Source: Enel Green Power North America DOE is exploring the potential of using hybrid ...

  15. A Geothermal District-Heating System and Alternative Energy Research...

    Open Energy Info (EERE)

    2 Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Project Type Topic 3 Low Temperature...

  16. Chemical Geothermometers And Mixing Models For Geothermal Systems...

    Open Energy Info (EERE)

    to outline favorable places to explore for geothermal energy. Some of the qualitative methods, such as the delineation of mercury and helium anomalies in soil gases, do not...

  17. Exploration Guides For Active High-Temperature Geothermal Systems...

    Open Energy Info (EERE)

    field (or ore deposit), iv) hydrothermal fluids and their surface expression, and v) geothermal reservoirs as against epithermal orebodies, have enabled us to formulate...

  18. Temporary Bridging Agents for Use in Drilling and Completions of EGS

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Develop materials or systems that bridge to seal or divert flow from fractures existing while drilling EGS wells or in injection formation and that eventually decompose thereby leaving the fractures unsealed and undamaged.

  19. DOE Announces Investment of up to $84 Million in Geothermal Energy |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Investment of up to $84 Million in Geothermal Energy DOE Announces Investment of up to $84 Million in Geothermal Energy March 4, 2009 - 12:00am Addthis WASHINGTON - U.S. Department of Energy Secretary Steven Chu today announced the release of two Funding Opportunity Announcements (FOAs) for up to $84 million to support the development of Enhanced Geothermal Systems (EGS). Geothermal energy technologies use energy from the earth to heat buildings and generate electricity.

  20. Life-cycle analysis results of geothermal systems in comparison to other power systems.

    SciTech Connect (OSTI)

    Sullivan, J. L.; Clark, C. E.; Han, J.; Wang, M.; Energy Systems

    2010-10-11

    A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's expanded Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies. As a basis of comparison, a similar analysis has been conducted for other power-generating systems, including coal, natural gas combined cycle, nuclear, hydroelectric, wind, photovoltaic, and biomass by expanding the GREET model to include power plant construction for these latter systems with literature data. In this way, the GREET model has been expanded to include plant construction, as well as the usual fuel production and consumption stages of power plant life cycles. For the plant construction phase, on a per-megawatt (MW) output basis, conventional power plants in general are found to require less steel and concrete than renewable power systems. With the exception of the concrete requirements for gravity dam hydroelectric, enhanced geothermal and hydrothermal binary used more of these materials per MW than other renewable power-generation systems. Energy and greenhouse gas (GHG) ratios for the infrastructure and other life-cycle stages have also been developed in this study per kilowatt-hour (kWh) of electricity output by taking into account both plant capacity and plant lifetime. Generally, energy burdens per energy output associated with plant infrastructure are higher for renewable systems than conventional ones. GHG emissions per kWh of electricity output for plant construction follow a similar trend. Although some of the renewable systems have GHG emissions during plant operation, they are much smaller than those emitted by fossil fuel thermoelectric systems. Binary geothermal systems have virtually insignificant GHG emissions compared to fossil systems. Taking into account plant construction and operation, the GREET model shows that fossil thermal plants have fossil energy use and GHG emissions per kWh of electricity output about one order of magnitude higher than renewable power systems, including geothermal power.

  1. Geothermal Technologies Office 2015 Peer Review

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    | US DOE Geothermal Office eere.energy.gov Geothermal Technologies Office 2015 Peer Review Sustainability of Shear-Induced Permeability for EGS Reservoirs - A Laboratory...

  2. Geothermal Energy News | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    November 18, 2008 International Partnership for Geothermal Technology Launches Website Geothermal energy, with EGS, has the potential to be the world's only renewable baseload...

  3. 2013 Annual Report -- Geothermal Technologies Office | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Raft River Geothermal Plant in Idaho represents both a conventional hydrothermal setting and an EGS demonstration project. Raft River Geothermal Plant in Idaho represents both a...

  4. DOE Announces Notice of Intent for EGS Observatory | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    data dissemination effort to capture and share in real-time a higher-fidelity picture of EGS creation and evolution processes than any prior geothermal demonstration in the world. ...

  5. Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This project will provide the first ever formal evaluation of fracture and fracture flow evolution in an EGS reservoir following a hydraulic stimulation.

  6. Geothermal Power and Interconnection: The Economics of Getting to Market

    SciTech Connect (OSTI)

    Hurlbut, D.

    2012-04-01

    This report provides a baseline description of the transmission issues affecting geothermal technologies. The report begins with a comprehensive overview of the grid, how it is planned, how it is used, and how it is paid for. The report then overlays onto this 'big picture' three types of geothermal technologies: conventional hydrothermal systems; emerging technologies such as enhanced engineered geothermal systems (EGS) and geopressured geothermal; and geothermal co-production with existing oil and gas wells. Each category of geothermal technology has its own set of interconnection issues, and these are examined separately for each. The report draws conclusions about each technology's market affinities as defined by factors related to transmission and distribution infrastructure. It finishes with an assessment of selected markets with known geothermal potential, identifying those that offer the best prospects for near-term commercial development and for demonstration projects.

  7. Geothermal Permeability Enhancement - Final Report

    SciTech Connect (OSTI)

    Joe Beall; Mark Walters

    2009-06-30

    The overall objective is to apply known permeability enhancement techniques to reduce the number of wells needed and demonstrate the applicability of the techniques to other undeveloped or under-developed fields. The Enhanced Geothermal System (EGS) concept presented in this project enhances energy extraction from reduced permeability zones in the super-heated, vapor-dominated Aidlin Field of the The Geysers geothermal reservoir. Numerous geothermal reservoirs worldwide, over a wide temperature range, contain zones of low permeability which limit the development potential and the efficient recovery of heat from these reservoirs. Low permeability results from poorly connected fractures or the lack of fractures. The Enhanced Geothermal System concept presented here expands these technologies by applying and evaluating them in a systematic, integrated program.

  8. Development of Exploration Methods for Engineered Geothermal System through Integrated Geoscience Interpretation

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This project will deploy, test and calibrate Non-invasive EGS Exploration Methodology integrating geoscience data to predict temperature and rock type at a scale of 5km x 5km at depths of 1-5km.

  9. State Geothermal Resource Assessment and Data Collection Efforts

    Broader source: Energy.gov [DOE]

    HawaiiNational Geothermal Data System Aids in Discovering Hawaii's Geothermal Resource (November 20, 2012)

  10. White Mountain Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    Location County Geothermal Area Geothermal Region Geothermal Project Profile Developer Eureka Green Systems Project Type Hydrothermal GEA Development Phase Phase II - Resource...

  11. Geothermal Literature Review | Open Energy Information

    Open Energy Info (EERE)

    Geothermal Literature Review (Smith, 1983) Unspecified A History Of Hot Dry Rock Geothermal Energy Systems Geothermal Literature Review (Wisian, Et Al., 2001) Unspecified...

  12. National Geothermal Resource Assessment and Classification |...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    National Geothermal Resource Assessment and Classification track 2: hydrothermal | geothermal 2015 peer review National Geothermal Data System Architecture Design, Testing and ...

  13. Updated U.S. Geothermal Supply Curve

    SciTech Connect (OSTI)

    Augustine, C.; Young, K. R.; Anderson, A.

    2010-02-01

    This paper documents the approach used to update the U.S. geothermal supply curve. The analysis undertaken in this study estimates the supply of electricity generation potential from geothermal resources in the United States and the levelized cost of electricity (LCOE), capital costs, and operating and maintenance costs associated with developing these geothermal resources. Supply curves were developed for four categories of geothermal resources: identified hydrothermal (6.4 GWe), undiscovered hydrothermal (30.0 GWe), near-hydrothermal field enhanced geothermal systems (EGS) (7.0 GWe) and deep EGS (15,900 GWe). Two cases were considered: a base case and a target case. Supply curves were generated for each of the four geothermal resource categories for both cases. For both cases, hydrothermal resources dominate the lower cost range of the combined geothermal supply curve. The supply curves indicate that the reservoir performance improvements assumed in the target case could significantly lower EGS costs and greatly increase EGS deployment over the base case.

  14. Enhanced Geothermal Systems Research and Development: Models of Subsurface Chemical Processes Affecting Fluid Flow

    SciTech Connect (OSTI)

    Moller, Nancy; Weare J. H.

    2008-05-29

    Successful exploitation of the vast amount of heat stored beneath the earth’s surface in hydrothermal and fluid-limited, low permeability geothermal resources would greatly expand the Nation’s domestic energy inventory and thereby promote a more secure energy supply, a stronger economy and a cleaner environment. However, a major factor limiting the expanded development of current hydrothermal resources as well as the production of enhanced geothermal systems (EGS) is insufficient knowledge about the chemical processes controlling subsurface fluid flow. With funding from past grants from the DOE geothermal program and other agencies, we successfully developed advanced equation of state (EOS) and simulation technologies that accurately describe the chemistry of geothermal reservoirs and energy production processes via their free energies for wide XTP ranges. Using the specific interaction equations of Pitzer, we showed that our TEQUIL chemical models can correctly simulate behavior (e.g., mineral scaling and saturation ratios, gas break out, brine mixing effects, down hole temperatures and fluid chemical composition, spent brine incompatibilities) within the compositional range (Na-K-Ca-Cl-SO4-CO3-H2O-SiO2-CO2(g)) and temperature range (T < 350°C) associated with many current geothermal energy production sites that produce brines with temperatures below the critical point of water. The goal of research carried out under DOE grant DE-FG36-04GO14300 (10/1/2004-12/31/2007) was to expand the compositional range of our Pitzer-based TEQUIL fluid/rock interaction models to include the important aluminum and silica interactions (T < 350°C). Aluminum is the third most abundant element in the earth’s crust; and, as a constituent of aluminosilicate minerals, it is found in two thirds of the minerals in the earth’s crust. The ability to accurately characterize effects of temperature, fluid mixing and interactions between major rock-forming minerals and hydrothermal and/or injected fluids is critical to predict important chemical behaviors affecting fluid flow, such as mineral precipitation/dissolution reactions. We successfully achieved the project goal and objectives by demonstrating the ability of our modeling technology to correctly predict the complex pH dependent solution chemistry of the Al3+ cation and its hydrolysis species: Al(OH)2+, Al(OH)2+, Al(OH)30, and Al(OH)4- as well as the solubility of common aluminum hydroxide and aluminosilicate minerals in aqueous brines containing components (Na, K, Cl) commonly dominating hydrothermal fluids. In the sodium chloride system, where experimental data for model parameterization are most plentiful, the model extends to 300°C. Determining the stability fields of aluminum species that control the solubility of aluminum-containing minerals as a function of temperature and composition has been a major objective of research in hydrothermal chemistry.

  15. 300°C Capable Electronics Platform and Temperature Sensor System For Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objectives: Enable geothermal wellbore monitoring through the development of SiC based electronics and ceramic packaging capable of sustained operation at temperatures up to 300˚C and 10 km depth. Demonstrate the technology with a temperature sensor system.

  16. Characterizing Structural Controls of EGS-Candidate and Conventional...

    Open Energy Info (EERE)

    systems in the Great Basin and adjacent regions. Phase I (Year 1) involves a broad inventory of structural settings of geothermal systems in the Great Basin, Walker Lane,...

  17. Geothermal Systems are a Breath of Fresh Air for Illinois School District |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Systems are a Breath of Fresh Air for Illinois School District Geothermal Systems are a Breath of Fresh Air for Illinois School District May 24, 2010 - 11:01am Addthis Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don’t produce excess noise. | Photo Courtesy of Sterling Public Schools Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don't produce excess

  18. How to Utilize the National Geothermal Data System (NGDS) and Create Your

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Own Federated Data Network with "Node-In-A-Box" | Department of Energy How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" PDF icon ngds-niab-webinar.pdf More Documents & Publications CanGEA Fifth Annual Geothermal Conference Presentation - Mapping & Database

  19. National Geothermal Data System: Case Studies on Exploration and Development of Potential Geothermal Sites Through Distributed Data Sharing

    SciTech Connect (OSTI)

    Anderson, Arlene; Allison, Lee; Richard, Steve; Caudill-Daugherty, Christy; Patten, Kim

    2014-09-29

    The NGDS released version 1 of the system on April 30, 2014 using the US Geoscience Information Network (USGIN) as its data integration platform. NGDS supports the 2013 Open Data Policy, and as such, the launch was featured at the 2014 Energy Datapalooza. Currently, the NGDS features a comprehensive user interface for searching and accessing nearly 41,000 documents and more than 9 million data points shared by scores of data providers across the U.S. The NGDS supports distributed data sharing, permitting the data owners to maintain the raw data that is made available to the consumer. Researchers and industry have been utilizing the NGDS as a mechanism for promoting geothermal development across the country, from hydrothermal to ground source heat pump applications. Case studies in geothermal research and exploration from across the country are highlighted.

  20. Evaluation of Emerging Technology for Geothermal Drilling and Logging

    Broader source: Energy.gov (indexed) [DOE]

    Applications | Department of Energy Evaluation of Emerging Technology for Geothermal Drilling and Logging Applications presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon sandia_evaluation_drilling_tech_peer2013.pdf More Documents & Publications Evaluation of Emerging Technology for Geothermal Drilling and Logging Applications Technology Development and Field Trials of EGS Drilling Systems GEA Geothermal Summit Presentation … Lauren Boyd

  1. Experiment-Based Model for the Chemical Interactions between Geothermal

    Broader source: Energy.gov (indexed) [DOE]

    Rocks, Supercritical Carbon Dioxide and Water | Department of Energy Experiment-Based Model for the Chemical Interactions between Geothermal Rocks, Supercritical Carbon Dioxide and Water presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon palto_alto_research_center_peer2013.pdf More Documents & Publications Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission Fluid Chemical Impact of Elevated CO2on Geothermal Energy Production R & D

  2. Detection and Characterization of Natural and Induced Fractures for the Development of Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objectives: Combine geophysical methods for reservoir and fracture characterization with rock physics measurements made under in-situ conditions (up to 350⁰C) for development of geothermal systems.

  3. IEA-GIA ExCo - National Geothermal Data System and Online Tools

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    IEA-GIA ExCo National Geothermal Data System & Online Tools Jay Nathwani Enel Salt Wells - ... Capacity Increases 2005-2010 5 In 2010 only 15 MW came online in the United States. ...

  4. A Transient Model of the Geothermal System of the Long Valley...

    Open Energy Info (EERE)

    flow of hot water in a confined aquifer. The results give information on the transient nature of the geothermal system operating in the Long Valley caldera and on the application...

  5. National Geothermal Data System State Contributions by Data Type (Appendix A1-b)

    SciTech Connect (OSTI)

    Love, Diane

    2015-12-20

    Multipaged spreadsheet listing an inventory of data submissions to the State contributions to the National Geothermal Data System project by services, by state, by metadata compilations, metadata, and map count, including a summary of information.

  6. Method for inhibiting silica precipitation and scaling in geothermal flow systems

    DOE Patents [OSTI]

    Harrar, J.E.; Lorensen, L.E.; Locke, F.E.

    1980-06-13

    A method for inhibiting silica scaling and precipitation in geothermal flow systems by on-line injection of low concentrations of cationic nitrogen-containing compounds, particularly polymeric imines, polymeric amines, and quaternary ammonium compounds is described.

  7. Method for inhibiting silica precipitation and scaling in geothermal flow systems

    DOE Patents [OSTI]

    Harrar, Jackson E.; Lorensen, Lyman E.; Locke, Frank E.

    1982-01-01

    A method for inhibiting silica scaling and precipitation in geothermal flow systems by on-line injection of low concentrations of cationic nitrogen-containing compounds, particularly polymeric imines, polymeric amines, and quaternary ammonium compounds.

  8. Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field...

    Open Energy Info (EERE)

    Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  9. A New Gold Pan For The West- Discovering Blind Geothermal Systems...

    Open Energy Info (EERE)

    Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: A...

  10. The Latera geothermal system (Italy); Chemical composition of the geothermal fluid and hypotheses on its origin

    SciTech Connect (OSTI)

    Gianelli, G. ); Scandiffio, G. )

    1989-01-01

    The chemistry of the fluid produced in the Latera geothermal field and the petrology of the hydrothermal minerals found in drill cores and cuttings suggest mixing of a hot Na-Cl fluid with fluids circulating in carbonate units. Evidence exists of a deep fluid of a possible magmatic origin. The very high temperature (above 400{sup 0}C) measured in a deep drill hole indicates the presence of a geothermal fluid, decarbonation and dehydration of sedimentary rocks and there may even be at depth a fluid that still has magmatic characteristics. However, this fluid is certainly mixed with Ca-So/sub 4/-HCO/sub 3/ waters coming from the Mesozoic carbonate rocks below the volcanic cover.

  11. Navy's Geothermal Program Office: Overview of Recovery Act (ARRA...

    Open Energy Info (EERE)

    to medium-sized (e.g. 5-50 MWe), conventional geothermal systems exist in the western U.S. Most of these may ultimately be classified as 'blind' discoveries because of their...

  12. Hybrid Cooling Systems for Low-Temperature Geothermal Power Production

    SciTech Connect (OSTI)

    Ashwood, A.; Bharathan, D.

    2011-03-01

    This paper describes the identification and evaluation of methods by which the net power output of an air-cooled geothermal power plant can be enhanced during hot ambient conditions with a minimal amount of water use.

  13. 36Cl/Cl ratios in geothermal systems- preliminary measurements...

    Open Energy Info (EERE)

    in deep groundwaters of the Mono Basin north of the Coso field. Authors Nimz, G. J.; Moore, J. N.; Kasameyer and P. W. Published Geothermal Resource Council Transactions 1997,...

  14. Geothermal Technologies Office April

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Annual Report Geothermal Technologies Office April 2016 1 2015 Annual Report | Geothermal Technologies Office Director's Message Geothermal Technologies Office FY 2016 Budget at a Glance Enhanced Geothermal Systems Hydrothermal Program Low-Temperature and Coproduced Resources Systems Analysis Events and Highlights People Acronyms Resources Table of Contents 2 2 3 7 13 17 19 23 26 28 2015 Achievements Geothermal Technologies Office Steam, West Flank of Coso, NV The 2015 Annual Report of the

  15. Updating the Classification of Geothermal Resources

    Broader source: Energy.gov [DOE]

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  16. Updating the Classification of Geothermal Resources- Presentation

    Broader source: Energy.gov [DOE]

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  17. Seismic Fracture Characterization Methods for Enhanced Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Seismic Fracture Characterization Methods for Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Seismic Fracture Characterization Methods for ...

  18. SILICA GEL BEHAVIOR UNDER DIFFERENT EGS CHEMICAL AND THERMAL CONDITIONS: AN EXPERIMENTAL STUDY

    SciTech Connect (OSTI)

    Hunt, J D; Ezzedine, S M; Bourcier, W; Roberts, S

    2012-01-19

    Fractures and fracture networks are the principal pathways for migration of water and contaminants in groundwater systems, fluids in enhanced geothermal systems (EGS), oil and gas in petroleum reservoirs, carbon dioxide leakage from geological carbon sequestration, and radioactive and toxic industrial wastes from underground storage repositories. When dealing with EGS fracture networks, there are several major issues to consider, e.g., the minimization of hydraulic short circuits and losses of injected geothermal fluid to the surrounding formation, which in turn maximize heat extraction and economic production. Gel deployments to direct and control fluid flow have been extensively and successfully used in the oil industry for enhanced oil recovery. However, to the best of our knowledge, gels have not been applied to EGS to enhance heat extraction. In-situ gelling systems can either be organic or inorganic. Organic polymer gels are generally not thermostable to the typical temperatures of EGS systems. Inorganic gels, such as colloidal silica gels, however, may be ideal blocking agents for EGS systems if suitable gelation times can be achieved. In the current study, we explore colloidal silica gelation times and rheology as a function of SiO{sub 2} concentration, pH, salt concentration, and temperature, with preliminary results in the two-phase field above 100 C. Results at 25 C show that it may be possible to choose formulations that will gel in a reasonable and predictable amount of time at the temperatures of EGS systems.

  19. Energy Returned On Investment of Engineered Geothermal Systems Annual Report FY2010

    SciTech Connect (OSTI)

    Mansure, A.J.

    2010-12-31

    Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. EROI analyses of geothermal energy are either out of date or presented online with little supporting documentation. Often comparisons of energy systems inappropriately use 'efficiency' when EROI would be more appropriate. For geothermal electric power generation, EROI is determined by the electric energy delivered to the consumer compared to the energy consumed to build, operate, and decommission the facility.

  20. Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    System | Department of Energy Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System April 12, 2013 - 12:00pm Addthis WASHINGTON -- As part of the Obama Administration's all-of-the-above energy strategy, the Energy Department today recognized the nation's first commercial enhanced geothermal system (EGS) project to supply electricity to the grid. Based in Churchill County, Nevada, Ormat

  1. Advanced Horizontal Well Recirculation Systems for Geothermal Energy Recovery in Sedimentary and Crystalline Formations

    SciTech Connect (OSTI)

    Bruno, Mike S.; Detwiler, Russell L.; Lao, Kang; Serajian, Vahid; Elkhoury, Jean; Diessl, Julia; White, Nicky

    2012-12-13

    There is increased recognition that geothermal energy resources are more widespread than previously thought, with potential for providing a significant amount of sustainable clean energy worldwide. Recent advances in drilling, completion, and production technology from the oil and gas industry can now be applied to unlock vast new geothermal resources, with some estimates for potential electricity generation from geothermal energy now on the order of 2 million megawatts. The primary objectives of this DOE research effort are to develop and document optimum design configurations and operating practices to produce geothermal power from hot permeable sedimentary and crystalline formations using advanced horizontal well recirculation systems. During Phase I of this research project Terralog Technologies USA and The University of California, Irvine (UCI), have completed preliminary investigations and documentation of advanced design concepts for paired horizontal well recirculation systems, optimally configured for geothermal energy recovery in permeable sedimentary and crystalline formations of varying structure and material properties. We have also identified significant geologic resources appropriate for application of such technology. The main challenge for such recirculation systems is to optimize both the design configuration and the operating practices for cost-effective geothermal energy recovery. These will be strongly influenced by sedimentary formation properties, including thickness and dip, temperature, thermal conductivity, heat capacity, permeability, and porosity; and by working fluid properties.

  2. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    2014-01-02

    FSR Part I presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region. FSR Part II presents (1) 278 new gravity stations; (2) enhanced gravity-magnetic modeling; (3) 42 new ambient seismic noise survey stations; (4) an integration of the new seismic noise data with a regional seismic network; (5) a new methodology and approach to interpret this data; (5) a novel method to predict rock type and temperature based on the newly interpreted data; (6) 70 new magnetotelluric (MT) stations; (7) an integrated interpretation of the enhanced MT data set; (8) the results of a 308 station soil CO2 gas survey; (9) new conductive thermal modeling in the project area; (10) new convective modeling in the Calibration Area; (11) pseudo-convective modeling in the Calibration Area; (12) enhanced data implications and qualitative geoscience correlations at three scales (a) Regional, (b) Project, and (c) Calibration Area; (13) quantitative geostatistical exploratory data analysis; and (14) responses to nine questions posed in the proposal for this investigation. Enhanced favorability/trust maps were not generated because there was not a sufficient amount of new, fully-vetted (see below) rock type, temperature, and stress data. The enhanced seismic data did generate a new method to infer rock type and temperature. However, in the opinion of the Principal Investigator for this project, this new methodology needs to be tested and evaluated at other sites in the Basin and Range before it is used to generate the referenced maps. As in the baseline conceptual model, the enhanced findings can be applied to both the hydrothermal system and EGS in the Dixie Valley region.

  3. Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Iovenitti, Joe

    FSR Part I presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region. FSR Part II presents (1) 278 new gravity stations; (2) enhanced gravity-magnetic modeling; (3) 42 new ambient seismic noise survey stations; (4) an integration of the new seismic noise data with a regional seismic network; (5) a new methodology and approach to interpret this data; (5) a novel method to predict rock type and temperature based on the newly interpreted data; (6) 70 new magnetotelluric (MT) stations; (7) an integrated interpretation of the enhanced MT data set; (8) the results of a 308 station soil CO2 gas survey; (9) new conductive thermal modeling in the project area; (10) new convective modeling in the Calibration Area; (11) pseudo-convective modeling in the Calibration Area; (12) enhanced data implications and qualitative geoscience correlations at three scales (a) Regional, (b) Project, and (c) Calibration Area; (13) quantitative geostatistical exploratory data analysis; and (14) responses to nine questions posed in the proposal for this investigation. Enhanced favorability/trust maps were not generated because there was not a sufficient amount of new, fully-vetted (see below) rock type, temperature, and stress data. The enhanced seismic data did generate a new method to infer rock type and temperature. However, in the opinion of the Principal Investigator for this project, this new methodology needs to be tested and evaluated at other sites in the Basin and Range before it is used to generate the referenced maps. As in the baseline conceptual model, the enhanced findings can be applied to both the hydrothermal system and EGS in the Dixie Valley region.

  4. SMU Geothermal Conference 2011 - Geothermal Technologies Program...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    SMU Geothermal Conference 2011 - Geothermal Technologies Program SMU Geothermal Conference 2011 - Geothermal Technologies Program DOE Geothermal Technologies Program presentation ...

  5. Design of a Geothermal Downhole Magnetic Flowmeter

    SciTech Connect (OSTI)

    Glowka, Dave A.; Normann, Randy A.

    2015-06-15

    This paper covers the development of a 300°C geothermal solid-state magnetic flowmeter (or magmeter) to support in situ monitoring of future EGS (enhanced geothermal system) production wells. Existing flowmeters are simple mechanical spinner sensors. These mechanical sensors fail within as little as 10 hrs, while a solid-state magmeter has the potential for months/years of operation. The design and testing of a magnetic flow sensor for use with existing high-temperature electronics is presented.

  6. NREL: Geothermal Technologies - Capabilities

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Capabilities The NREL geothermal team leverages its capabilities in several different areas to enhance the visibility of geothermal technologies. These areas include low-temperature resources; enhanced geothermal systems; strategic planning, analysis, and modeling; and project assessment. Low-Temperature Geothermal Resources NREL works to develop and deploy innovative new technologies that will help the geothermal community achieve widespread adoption of under-utilized low-temperature resources

  7. NREL: Geothermal Technologies - Projects

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Projects The NREL geothermal team is involved in various projects to help accelerate the development and deployment of clean, renewable geothermal technologies, including low-temperature resources; enhanced geothermal systems; strategic planning, analysis, and modeling; and project assessment. Low-Temperature Geothermal Resources NREL supports the U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO) through various collaborations that evaluate the levelized cost of electricity

  8. Recovery Act: Geothermal Data Aggregation: Submission of Information into the National Geothermal Data System, Final Report DOE Project DE-EE0002852 June 24, 2014

    SciTech Connect (OSTI)

    Blackwell, David D.; Chickering Pace, Cathy; Richards, Maria C.

    2014-06-24

    The National Geothermal Data System (NGDS) is a Department of Energy funded effort to create a single cataloged source for a variety of geothermal information through a distributed network of databases made available via web services. The NGDS will help identify regions suitable for potential development and further scientific data collection and analysis of geothermal resources as a source for clean, renewable energy. A key NGDS repository or ‘node’ is located at Southern Methodist University developed by a consortium made up of: • SMU Geothermal Laboratory • Siemens Corporate Technology, a division of Siemens Corporation • Bureau of Economic Geology at the University of Texas at Austin • Cornell Energy Institute, Cornell University • Geothermal Resources Council • MLKay Technologies • Texas Tech University • University of North Dakota. The focus of resources and research encompass the United States with particular emphasis on the Gulf Coast (on and off shore), the Great Plains, and the Eastern U.S. The data collection includes the thermal, geological and geophysical characteristics of these area resources. Types of data include, but are not limited to, temperature, heat flow, thermal conductivity, radiogenic heat production, porosity, permeability, geological structure, core geophysical logs, well tests, estimated reservoir volume, in situ stress, oil and gas well fluid chemistry, oil and gas well information, and conventional and enhanced geothermal system related resources. Libraries of publications and reports are combined into a unified, accessible, catalog with links for downloading non-copyrighted items. Field notes, individual temperature logs, site maps and related resources are included to increase data collection knowledge. Additional research based on legacy data to improve quality increases our understanding of the local and regional geology and geothermal characteristics. The software to enable the integration, analysis, and dissemination of this team’s NGDS contributions was developed by Siemens Corporate Technology. The SMU Node interactive application is accessible at http://geothermal.smu.edu. Additionally, files may be downloaded from either http://geothermal.smu.edu:9000/geoserver/web/ or through http://geothermal.smu.edu/static/DownloadFilesButtonPage.htm. The Geothermal Resources Council Library is available at https://www.geothermal-library.org/.

  9. Geothermal Maps | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Information Resources » Geothermal Maps Geothermal Maps Map of the United States, with color bands indicating favorability of deep EGS and dots indicating identified hydrothermal sites. The Geothermal Technologies Office (GTO) carries out R&D and demonstration efforts to deploy 12 GWe of clean geothermal energy by 2020 and expand geothermal into new U.S. regions. Locating and developing resources is an important part of that mission. GTO works with national laboratories to develop maps and

  10. Geothermal Water Use: Life Cycle Water Consumption, Water Resource Assessment, and Water Policy Framework

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    2014-06-10

    This report examines life cycle water consumption for various geothermal technologies to better understand factors that affect water consumption across the life cycle (e.g., power plant cooling, belowground fluid losses) and to assess the potential water challenges that future geothermal power generation projects may face. Previous reports in this series quantified the life cycle freshwater requirements of geothermal power-generating systems, explored operational and environmental concerns related to the geochemical composition of geothermal fluids, and assessed future water demand by geothermal power plants according to growth projections for the industry. This report seeks to extend those analyses by including EGS flash, both as part of the life cycle analysis and water resource assessment. A regional water resource assessment based upon the life cycle results is also presented. Finally, the legal framework of water with respect to geothermal resources in the states with active geothermal development is also analyzed.

  11. Geothermal Water Use: Life Cycle Water Consumption, Water Resource Assessment, and Water Policy Framework

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    This report examines life cycle water consumption for various geothermal technologies to better understand factors that affect water consumption across the life cycle (e.g., power plant cooling, belowground fluid losses) and to assess the potential water challenges that future geothermal power generation projects may face. Previous reports in this series quantified the life cycle freshwater requirements of geothermal power-generating systems, explored operational and environmental concerns related to the geochemical composition of geothermal fluids, and assessed future water demand by geothermal power plants according to growth projections for the industry. This report seeks to extend those analyses by including EGS flash, both as part of the life cycle analysis and water resource assessment. A regional water resource assessment based upon the life cycle results is also presented. Finally, the legal framework of water with respect to geothermal resources in the states with active geothermal development is also analyzed.

  12. Geographic Information System At Dixie Valley Geothermal Area...

    Open Energy Info (EERE)

    Unknown Exploration Basis This project is being conducted to develop exploration methodology for EGS development. Dixie Valley is being used as a calibration site for the EGS...

  13. Final Progress Report for Project Entitled: Quantum Dot Tracers for Use in Engineered Geothermal Systems

    SciTech Connect (OSTI)

    Rose, Peter; Bartl, Michael; Reimus, Paul; Williams, Mark; Mella, Mike

    2015-09-12

    The objective of this project was to develop and demonstrate a new class of tracers that offer great promise for use in characterizing fracture networks in EGS reservoirs. From laboratory synthesis and testing through numerical modeling and field demonstrations, we have demonstrated the amazing versatility and applicability of quantum dot tracers. This report summarizes the results of four years of research into the design, synthesis, and characterization of semiconductor nanocrystals (quantum dots) for use as geothermal tracers.

  14. Generic Guide Specification for Geothermal Heat Pump Systems

    SciTech Connect (OSTI)

    Thomas, WKT

    2000-04-12

    The attached Geothermal (Ground-Source) Heat Pump (GHP) Guide Specifications have been developed by Oak Ridge National Laboratory (ORNL) with the intent to assist federal agency sites and engineers in the preparation of construction specifications for GHP projects. These specifications have been developed in the industry-standard Construction Specification Institute (CSI) format and cover several of the most popular members of the family of GHP systems. These guide specifications are applicable to projects whether the financing is with conventional appropriations, arranged by GHP specialty ESCOs under the U.S. Department of Energy's Technology-Specific GHP Super ESPCs, arranged by utilities under Utility Energy Service Contracts (UESCs) or arranged by generalist ESCOs under the various regional ESPCs. These specifications can provide several benefits to the end user that will help ensure successful GHP system installations. GHP guide specifications will help to streamline the specification development, review, and approval process because the architecture and engineering (AE) firm will be working from the familiar CSI format instead of developing the specifications from other sources. The guide specifications help to provide uniformity, standardization, and consistency in both the construction specifications and system installations across multiple federal sites. This standardization can provide future benefits to the federal sites in respect to both maintenance and operations. GHP guide specifications can help to ensure that the agency is getting its money's worth from the GHP system by preventing the use of marginal or inferior components and equipment. The agency and its AE do not have to start from scratch when developing specifications and can use the specification as a template and/or a checklist in developing both the design and the contract documents. The guide specifications can save project costs by reducing the engineering effort required during the design development phase. Use of this guide specification for any project is strictly optional and at the discretion of the responsible party in charge. If used as a construction specification master template for GHP systems, this guide specification must, in all cases, be edited to apply to the specific project in question and to reflect the site-specific conditions relevant to the project. There is no guarantee of accuracy or applicability with respect to any portion of this specification and the user assumes all risk associated with the application of the information contained in this document.

  15. Use of Tracers to Characterize Fractures in Engineered Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface areas adjacent to a single geothermal well using tracers and injection/backflow techniques; design, fabricate and test a downhole instrument for measuring fracture flow following a hydraulic stimulation experiment.

  16. Electrical resistivity and magnetic investigations of the geothermal systems in the Rotorua area, New Zealand

    SciTech Connect (OSTI)

    Bibby, H.M. ); Dawson, G.B.; Rayner, H.H.; Bennie, S.L.; Bromley, C.J. )

    1992-04-01

    This paper reports that electrical and magnetic data are used in an investigation of a 450 km{sup 2} region in order to delineate the Rotorua City Geothermal system and determine its relationship with other geothermal systems in the region. Three distinct regions of low ({lt}30 Omega m) apparent resistivity are delineated. The southern of these outlines the Rotorua City Geothermal System which has an area of about 18 km{sup 2}, with the northern third covered by Lake Rotorua. The boundary of the system is characterized by a rapid lateral change in apparent resistivity which can be modeled as a single, near vertical zone in which the distance between hot and cold water is very narrow. Magnetic properties also change in the vicinity of the discontinuity in some areas, consistent with hydrothermal alteration having destroyed the magnetite in the rocks of the geothermal system. Hot water is believed to be rising, driven by buoyancy forces across the whole of the low resistivity region. There is some indication, particularly in the south, that the boundary between hot and cold fluids dips away from the field. A second low resistivity zone (the East Lake Rotorua anomaly) with an area of about 8 km{sup 2}, is believed to outline a second independent geothermal system, with surface manifestations on Mokoia Island, and on the eastern shore of the lake. High heat flow in lake bottom sediments, and a reduction in magnetic signature over this region supports this conclusion. A third resistivity low under the west of Lake Rotorua has no associated thermal features and is believed to be a fossil hydrothermal system. There is no apparent relationship between the location of the geothermal systems and the Rotorua caldera. The aeromagnetic measurements have delineated several highly magnetic bodies which cannot be linked with surface geology. These are believed to be caused by buried rhyolite dome complexes at shallow depth.

  17. Development of a Hydrothermal Spallation Drilling System for...

    Open Energy Info (EERE)

    System for EGS Project Type Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and DevelopmentAnalysis Project Type Topic 2 Drilling Systems Project...

  18. Development of Chemical Model to Predict the Interactions between Supercritical CO2and Fluid, and Rocks in EGS Reservoirs

    Broader source: Energy.gov [DOE]

    This project will develop a chemical model, based on existing models and databases, that is capable of simulating chemical reactions between supercritical (SC) CO2 and Enhanced Geothermal System (EGS) reservoir rocks of various compositions in aqueous, non-aqueous and 2-phase environments.

  19. Life-cycle analysis results for geothermal systems in comparison to other power systems: Part II.

    SciTech Connect (OSTI)

    Sullivan, J.L.; Clark, C.E.; Yuan, L.; Han, J.; Wang, M.

    2012-02-08

    A study has been conducted on the material demand and life-cycle energy and emissions performance of power-generating technologies in addition to those reported in Part I of this series. The additional technologies included concentrated solar power, integrated gasification combined cycle, and a fossil/renewable (termed hybrid) geothermal technology, more specifically, co-produced gas and electric power plants from geo-pressured gas and electric (GPGE) sites. For the latter, two cases were considered: gas and electricity export and electricity-only export. Also modeled were cement, steel and diesel fuel requirements for drilling geothermal wells as a function of well depth. The impact of the construction activities in the building of plants was also estimated. The results of this study are consistent with previously reported trends found in Part I of this series. Among all the technologies considered, fossil combustion-based power plants have the lowest material demand for their construction and composition. On the other hand, conventional fossil-based power technologies have the highest greenhouse gas (GHG) emissions, followed by the hybrid and then two of the renewable power systems, namely hydrothermal flash power and biomass-based combustion power. GHG emissions from U.S. geothermal flash plants were also discussed, estimates provided, and data needs identified. Of the GPGE scenarios modeled, the all-electric scenario had the highest GHG emissions. Similar trends were found for other combustion emissions.

  20. DEVELOPING THE NATIONAL GEOTHERMAL DATA SYSTEM ADOPTION OF CKAN FOR DOMESTIC & INTERNATIONAL DATA DEPLOYMENT

    SciTech Connect (OSTI)

    Clark, Ryan J.; Kuhmuench, Christoph; Richard, Stephen M.

    2013-01-01

    The National Geothermal Data System (NGDS) De- sign and Testing Team is developing NGDS software currently referred to as the “NGDS Node-In-A-Box”. The software targets organizations or individuals who wish to host at least one of the following: • an online repository containing resources for the NGDS; • an online site for creating metadata to register re- sources with the NGDS • NDGS-conformant Web APIs that enable access to NGDS data (e.g., WMS, WFS, WCS); • NDGS-conformant Web APIs that support dis- covery of NGDS resources via catalog service (e.g. CSW) • a web site that supports discovery and under- standing of NGDS resources A number of different frameworks for development of this online application were reviewed. The NGDS Design and Testing Team determined to use CKAN (http://ckan.org/), because it provides the closest match between out of the box functionality and NGDS node-in-a-box requirements. To achieve the NGDS vision and goals, this software development project has been inititated to provide NGDS data consumers with a highly functional inter- face to access the system, and to ease the burden on data providers who wish to publish data in the sys- tem. It is important to note that this software package constitutes a reference implementation. The NGDS software is based on open standards, which means other server software can make resources available, and other client applications can utilize NGDS data. A number of international organizations have ex- pressed interest in the NGDS approach to data access. The CKAN node implementation can provide a sim- ple path for deploying this technology in other set- tings.

  1. Hydrology of the Greater Tongonan geothermal system, Philippines, as deduced from geochemical and isotopic data

    SciTech Connect (OSTI)

    Alvis-Isidro, R.R.; Solana, R.R.; D`amore, F.; Nuti, S.; Gonfiantini, R.

    1993-10-01

    Fluids in the Greater Tongonan geothermal system exhibit a large positive {sup 18}O shift from the Leyte meteoric water line. However, there is also a significant shift in {sup 2}H. The {delta}{sup 2}H-{delta}{sup 18}O plot shows that the geothermal fluids may be derived by the mixing of meteoric water with local magmatic water. The most enriched water in the Greater Tongonan system, in terms of {delta}{sup 18}O, {delta}{sup 2}H and Cl, is comprised of approximately 40% magmatic water. Baseline isotope results support a hydrogeochemical model in which there is increasing meteoric water dilution to the southeast, from Mahiao to Sambaloran and towards Malitbog. The Cl-{delta}{sup 18}O plot confirms that the geothermal fluid in Mahanagdong, further southeast, is distinct from that of the Mahiao-Sambaloran-Malitbog system.

  2. Microearthquake Technology for EGS Fracture Characterization

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    7 | US DOE Geothermal Program eere.energy.gov ScientificTechnical Approach * ... Peak, Nevada - A geothermal field in Indonesia - Long Valley caldera, California - the ...

  3. What can granular media teach us about deformation in geothermal systems

    SciTech Connect (OSTI)

    Stephen L. Karner

    2004-06-01

    Experiments on granular media have significantly improved our understanding of deformation processes in porous rocks. Laboratory results have lead to fundamental theoretical developments (such as poroelasticity, or rate and state-variable friction) that have found widespread application. This paper presents results from laboratory experiments that help constrain these theories. Data from triaxial deformation experiments on quartz sand aggregates are used to illustrate stress-dependent behavior of poroelastic parameters (e.g. the Biot-Willis and Skempton coefficients). Calculations for these coefficients show systematic variations as effective stress increases, in a manner consistent with measured compressibilities of the aggregate. Data from shear experiments show that frictional strength varies systematically with time and temperature. At temperatures below 450 oC, shear zones exhibit greater cohesive strengths as the time of stationary contact increases (hence, positive healing rates). For conditions exceeding 450 oC, shear zone strength is seen to decrease with contact time (negative healing rates). The results from both volumetric compaction and frictional shear experiments are well described by poroelasticity as well as rate and state-variable friction. The combination of these constitutive relations may provide a powerful tool that can be used in numerical models that couple thermal, mechanical, hydraulic, and temporal processes as occur in geothermal systems.

  4. Modeling of heat extraction from variably fractured porous media in Enhanced Geothermal Systems

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hadgu, Teklu; Kalinina, Elena Arkadievna; Lowry, Thomas Stephen

    2016-01-30

    Modeling of heat extraction in Enhanced Geothermal Systems is presented. The study builds on recent studies on the use of directional wells to improve heat transfer between doublet injection and production wells. The current study focuses on the influence of fracture orientation on production temperature in deep low permeability geothermal systems, and the effects of directional drilling and separation distance between boreholes on heat extraction. The modeling results indicate that fracture orientation with respect to the well-pair plane has significant influence on reservoir thermal drawdown. As a result, the vertical well doublet is impacted significantly more than the horizontal wellmore » doublet« less

  5. NATIONAL GEOTHERMAL DATA SYSTEM: AN EXEMPLAR OF OPEN ACCESS TO DATA

    SciTech Connect (OSTI)

    Blackman, Harold; Blackman, Harold M.; Blackman, Harold M.; Blackman, Harold; Blackman, Harold; Blackman, Harold

    2013-10-01

    The formal launch of National Geothermal Data System (NGDS www.geothermaldata.org) in 2014 will provide open access to technical geothermal-relevant data from all of the Department of Energy- sponsored geothermal development and research projects and geologic data from all 50 states. By making data easily discoverable and accessible this system will open new exploration opportunities and shorten project development. The prototype data system currently includes multiple data nodes, and nationwide data online and available to the public, indexed through a single catalog under construction at http://search.geothermaldata.org. Data from state geological surveys and partners includes more than 5 million records online, including 1.48 million well headers (oil and gas, water, geothermal), 732,000 well logs, and 314,000 borehole temperatures and is growing rapidly. There are over 250 Web services and another 138 WMS (Web Map Services) registered in the system as of August, 2013. Additional data record is being added by companion projects run by Boise State University, Southern Methodist University, and the USGS. The National Renewable Energy Laboratory is managing the Geothermal Data Repository, an NGDS node that will be a clearinghouse for data from hundreds of DOE-funded geothermal projects. NGDS is built on the US Geoscience Information Network (USGIN) data integration framework, which is a joint undertaking of the USGS and the Association of American State Geologists (AASG). NGDS is fully compliant with the White House Executive Order of May 2013, requiring all federal agencies to make their data holdings publicly accessible online in open source, interoperable formats with common core and extensible metadata. The National Geothermal Data System is being designed, built, deployed, and populated primarily with grants from the US Department of Energy, Geothermal Technologies Office. To keep this operational system sustainable after the original implementation will require four core elements: continued serving of data and applications by providers; maintenance of system operations; a governance structure; and an effective business model. Each of these presents a number of challenges currently under consideration.

  6. Near-Surface CO2 Monitoring And Analysis To Detect Hidden Geothermal Systems

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2005-01-19

    ''Hidden'' geothermal systems are systems devoid of obvious surface hydrothermal manifestations. Emissions of moderate-to-low solubility gases may be one of the primary near-surface signals from these systems. We investigate the potential for CO2 detection and monitoring below and above ground in the near-surface environment as an approach to exploration targeting hidden geothermal systems. We focus on CO2 because it is the dominant noncondensible gas species in most geothermal systems and has moderate solubility in water. We carried out numerical simulations of a CO2 migration scenario to calculate the magnitude of expected fluxes and concentrations. Our results show that CO2 concentrations can reach high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are predominantly controlled by CO2 uptake by photosynthesis, production by root respiration, microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include the infrared gas analyzer, the accumulation chamber method, the eddy covariance method, hyperspectral imaging, and light detection and ranging. To meet the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring techniques with statistical analysis and modeling strategies. The proposed monitoring plan initially focuses on rapid, economical, reliable measurements of CO2 subsurface concentrations and surface fluxes and statistical analysis of the collected data. Based on this analysis, are as with a high probability of containing geothermal CO2 anomalies can be further sampled and analyzed using more expensive chemical and isotopic methods. Integrated analysis of all measurements will determine definitively if CO2 derived from a deep geothermal source is present, and if so, the spatial extent of the anomaly. The suitability of further geophysical measurements, installation of deep wells, and geochemical analyses of deep fluids can then be determined based on the results of the near surface CO2 monitoring program.

  7. Selected data for low-temperature (less than 90{sup 0}C) geothermal systems in the United States: reference data for US Geological Survey Circular 892

    SciTech Connect (OSTI)

    Reed, M.J.; Mariner, R.H.; Brook, C.A.; Sorey, M.L.

    1983-12-15

    Supporting data are presented for the 1982 low-temperature geothermal resource assessment of the United States. Data are presented for 2072 geothermal sites which are representative of 1168 low-temperature geothermal systems identified in 26 States. The low-temperature geothermal systems consist of 978 isolated hydrothermal-convection systems, 148 delineated-area hydrothermal-convection systems, and 42 delineated-area conduction-dominated systems. The basic data and estimates of reservoir conditions are presented for each geothermal system, and energy estimates are given for the accessible resource base, resource, and beneficial heat for each isolated system.

  8. Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems

    Broader source: Energy.gov [DOE]

    A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's GREET model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies.

  9. EERE Success Story-California: Next-Generation Geothermal Demonstratio...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    EERE Success Story-Northern California: Innovative Exploration Technologies Yield Geothermal Potential EERE Success Story-Oregon: DOE Advances Game-Changing EGS Geothermal ...

  10. Property:Geothermal/Partner10 | Open Energy Information

    Open Energy Info (EERE)

    property "GeothermalPartner10" Showing 1 page using this property. N Newberry Volcano EGS Demonstration Geothermal Project + University of Utah + Retrieved from "http:...

  11. A Roadmap for Strategic Development of Geothermal Exploration...

    Broader source: Energy.gov (indexed) [DOE]

    an EGS demonstration project. 2013 Annual Report -- Geothermal Technologies Office Geothermal Technologies Office Annual Report 2012 2013 Peer Review Opening Plenary Presentation...

  12. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas: (1) data acquisition and entry, involving data entry via word processors and magnetic tape; (2) quality assurance, including the criteria and standards handbook and front-end data-screening programs; (3) operation, involving database backups and information extraction; and (4) user assistance, preparation of such items as application programs, and a quarterly newsletter. The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

  13. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    1983-01-01

    GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas: (1) data acquisition and entry, involving data entry via word processors and magnetic tape; (2) quality assurance, including the criteria and standards handbook and front-end data-screening programs; (3) operation, involving database backups and information extraction; and (4) user assistance, preparation of such items as application programs, and a quarterly newsletter. The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

  14. Newberry Volcano EGS Demonstration Stimulation Modeling

    SciTech Connect (OSTI)

    Trenton T. Cladouhos, Matthew Clyne, Maisie Nichols,; Susan Petty, William L. Osborn, Laura Nofziger

    2011-10-23

    As a part of Phase I of the Newberry Volcano EGS Demonstration project, several data sets were collected to characterize the rock volume around the well. Fracture, fault, stress, and seismicity data has been collected by borehole televiewer, LiDAR elevation maps, and microseismic monitoring. Well logs and cuttings from the target well (NWG 55-29) and core from a nearby core hole (USGS N-2) have been analyzed to develop geothermal, geochemical, mineralogical and strength models of the rock matrix, altered zones, and fracture fillings (see Osborn et al., this volume). These characterization data sets provide inputs to models used to plan and predict EGS reservoir creation and productivity. One model used is AltaStim, a stochastic fracture and flow software model developed by AltaRock. The software's purpose is to model and visualize EGS stimulation scenarios and provide guidance for final planning. The process of creating an AltaStim model requires synthesis of geologic observations at the well, the modeled stress conditions, and the stimulation plan. Any geomechanical model of an EGS stimulation will require many assumptions and unknowns; thus, the model developed here should not be considered a definitive prediction, but a plausible outcome given reasonable assumptions. AltaStim is a tool for understanding the effect of known constraints, assumptions, and conceptual models on plausible outcomes.

  15. Property:Geothermal/FundingOpportunityAnnouncemt | Open Energy...

    Open Energy Info (EERE)

    Co., NV Geothermal Project + DE-FOA-0000109 + A Demonstration System for Capturing Geothermal Energy from Mine Waters beneath Butte, MT Geothermal Project + DE-FOA-0000116 +...

  16. Alternative Geothermal Power Production Scenarios

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    The information given in this file pertains to Argonne LCAs of the plant cycle stage for a set of ten new geothermal scenario pairs, each comprised of a reference and improved case. These analyses were conducted to compare environmental performances among the scenarios and cases. The types of plants evaluated are hydrothermal binary and flash and Enhanced Geothermal Systems (EGS) binary and flash plants. Each scenario pair was developed by the LCOE group using GETEM as a way to identify plant operational and resource combinations that could reduce geothermal power plant LCOE values. Based on the specified plant and well field characteristics (plant type, capacity, capacity factor and lifetime, and well numbers and depths) for each case of each pair, Argonne generated a corresponding set of material to power ratios (MPRs) and greenhouse gas and fossil energy ratios.

  17. Alternative Geothermal Power Production Scenarios

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    2014-03-14

    The information given in this file pertains to Argonne LCAs of the plant cycle stage for a set of ten new geothermal scenario pairs, each comprised of a reference and improved case. These analyses were conducted to compare environmental performances among the scenarios and cases. The types of plants evaluated are hydrothermal binary and flash and Enhanced Geothermal Systems (EGS) binary and flash plants. Each scenario pair was developed by the LCOE group using GETEM as a way to identify plant operational and resource combinations that could reduce geothermal power plant LCOE values. Based on the specified plant and well field characteristics (plant type, capacity, capacity factor and lifetime, and well numbers and depths) for each case of each pair, Argonne generated a corresponding set of material to power ratios (MPRs) and greenhouse gas and fossil energy ratios.

  18. Geothermal Power and Interconnection: The Economics of Getting to Market

    SciTech Connect (OSTI)

    Hurlbut, David

    2012-04-23

    This report provides a baseline description of the transmission issues affecting geothermal technologies. It is intended for geothermal experts in either the private or public sector who are less familiar with how the electricity system operates beyond the geothermal plant. The report begins with a comprehensive overview of the grid, how it is planned, how it is used, and how it is paid for. The report then overlays onto this "big picture" three types of geothermal technologies: conventional hydrothermal systems; emerging technologies such as enhanced engineered geothermal systems (EGS) and geopressured geothermal; and geothermal co-production with existing oil and gas wells. Each category of geothermal technology has its own set of interconnection issues, and these are examined separately for each. The report draws conclusions about each technology’s market affinities as defined by factors related to transmission and distribution infrastructure. It finishes with an assessment of selected markets with known geothermal potential, identifying those that offer the best prospects for near-term commercial development and for demonstration projects.

  19. Towards the Understanding of Induced Seismicity in Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Project objectives: To develop a combination of techniques to evaluate the relationship between EGS operations and the induced stress changes throughout the reservoir and the surrounding country rock.

  20. Enhanced Geothermal Systems Documents for Public Comment - Now...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    in San Francisco, California on August 3-4, 2011. The meeting focused on the technology needs specific to EGS reservoir characterization, creation, and sustainabilityoperation....

  1. 36Cl/Cl ratios in geothermal systems: preliminary measurements from the Coso Field

    SciTech Connect (OSTI)

    Nimz, G.J.; Moore, J.N.; Kasameyer, P.W.

    1997-07-01

    The {sub 36}Cl/Cl isotopic composition of chlorine in geothermal systems can be a useful diagnostic tool in characterizing hydrologic structure, in determining the origins and age of waters within the systems, and in differentiating the sources of chlorine (and other solutes) in the thermal waters. The {sub 36}Cl/Cl values for several geothermal water samples and reservoir host rock samples from the Coso, California geothermal field have been measured for these purposes. The results indicate that most of the chlorine is not derived from the dominant granitoid that host the geothermal system. If the chlorine was originally input into the Coso subsurface through meteoric recharge, that input occurred at least 1-1.25 million years ago. The results suggest that the thermal waters could be connate waters derived from sedimentary formations, presumably underlying and adjacent top the granitic rocks, which have recently migrated into the host rocks. Alternatively, most of the chlorine but not the water, may have recently input into the system from magmatic sources. In either case, the results indicate that most of the chlorine in the thermal waters has existed within the granitoid host rocks for no more than about 100,00-200,00 years. this residence time for the chlorine is similar to residence times suggested by other researchers for chlorine in deep groundwaters of the Mono Basin north of the Coso field.

  2. Demonstration of a Variable Phase Turbine Power System for Low Temperature Geothermal Resources

    SciTech Connect (OSTI)

    Hays, Lance G

    2014-07-07

    A variable phase turbine assembly will be designed and manufactured having a turbine, operable with transcritical, two-phase or vapor flow, and a generator – on the same shaft supported by process lubricated bearings. The assembly will be hermetically sealed and the generator cooled by the refrigerant. A compact plate-fin heat exchanger or tube and shell heat exchanger will be used to transfer heat from the geothermal fluid to the refrigerant. The demonstration turbine will be operated separately with two-phase flow and with vapor flow to demonstrate performance and applicability to the entire range of low temperature geothermal resources. The vapor leaving the turbine is condensed in a plate-fin refrigerant condenser. The heat exchanger, variable phase turbine assembly and condenser are all mounted on single skids to enable factory assembly and checkout and minimize installation costs. The system will be demonstrated using low temperature (237F) well flow from an existing large geothermal field. The net power generated, 1 megawatt, will be fed into the existing power system at the demonstration site. The system will demonstrate reliable generation of inexpensive power from low temperature resources. The system will be designed for mass manufacturing and factory assembly and should cost less than $1,200/kWe installed, when manufactured in large quantities. The estimated cost of power for 300F resources is predicted to be less than 5 cents/kWh. This should enable a substantial increase in power generated from low temperature geothermal resources.

  3. Heat Transfer and Fluid Transport of Supercritical CO2 in Enhanced Geothermal System with Local Thermal Non-equilibrium Model

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Zhang, Le; Luo, Feng; Xu, Ruina; Jiang, Peixue; Liu, Huihai

    2014-12-31

    The heat transfer and fluid transport of supercritical CO2 in enhanced geothermal system (EGS) is studied numerically with local thermal non-equilibrium model, which accounts for the temperature difference between solid matrix and fluid components in porous media and uses two energy equations to describe heat transfer in the solid matrix and in the fluid, respectively. As compared with the previous results of our research group, the effect of local thermal non-equilibrium mainly depends on the volumetric heat transfer coefficient ah, which has a significant effect on the production temperature at reservoir outlet and thermal breakthrough time. The uniformity of volumetricmore » heat transfer coefficient ah has little influence on the thermal breakthrough time, but the temperature difference become more obvious with time after thermal breakthrough with this simulation model. The thermal breakthrough time reduces and the effect of local thermal non-equilibrium becomes significant with decreasing ah.« less

  4. Stanford Geothermal Workshop - Geothermal Technologies Office...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    - Geothermal Technologies Office Stanford Geothermal Workshop - Geothermal Technologies Office Presentation by Geothermal Technologies Director Doug Hollett at the Stanford ...

  5. Economic Impact Analysis for EGS Geothermal Project | Open Energy...

    Open Energy Info (EERE)

    overall energy portfolio thereby leading the United States one step closer to achieving energy sustainability and energy independence. Location of Project Salt Lake City, UT...

  6. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    5 Companies involved in geothermal heat pump activities by type, 2008 and 2009 Type of Activity 2008 2009 Geothermal Heat Pump or System Design 17 17 Prototype Geothermal Heat Pump Development 12 13 Prototype Systems Geothermal Development 5 7 Wholesale Distribution 15 18 Retail Distribution 3 3 Installation 4 3 Manufacture of System Components 3 4 Source: U.S. Energy Information Administration (EIA), Form EIA-902, "Annual Geothermal

  7. Newberry EGS Demonstration: Phase 2.2 Report

    SciTech Connect (OSTI)

    Cladouhos, Trenton T.; Petty, Susan; Swyer, Mike W.; Nordin, Yini; Garrison, Geoff; Uddenberg, Matt; Grasso, Kyla; Stern, Paul; Sonnenthal, Eric; Foulger, Gillian; Julian, Bruce

    2015-07-03

    The Newberry Volcano EGS Demonstration is a five year field project designed to demonstrate recent technological advances for engineered geothermal systems (EGS) development. Advances in reservoir stimulation, diverter, and monitoring are being tested in a hot (>300 ºC), dry well (NWG 55-29) drilled in 2008. In the fall of 2014, 9,500m3 (2.5 million gallons) of groundwater were injected at a maximum wellhead pressure of 195 bar (2850 psi) over 4 weeks of hydraulic stimulation. Injectivity changes, thermal profiles and seismicity indicate that fracture permeability in well NWG 55-29 was enhanced. The fifteen-station microseismic array (MSA) located 398 seismic events, ranging in magnitude from M 0 to M 2.26. The next step is to drill a production well into the EGS reservoir. Advanced analysis of the microseismic data including hand picking of first arrivals, moment tensors, relative relocations, and velocity model improvements have resulted new higher-quality microseismic catalogs. These catalogs have been combined by relative weighting and gridding of seismic densities, resulting in probability-based maps and cross-sections, which have been used to plan a production well trajectory. The microseismic locations and times were also used to develop a reservoir diffusivity model, which can be used to evaluate stimulation plans such as dual-well stimulation.

  8. The Occurrence of Pyrrhotite in the Ngawha Geothermal System, New Zealand

    SciTech Connect (OSTI)

    Cox, M.E.; Browne, P.R.L.

    1995-01-01

    The Ngawha geothermal system is low in all sulfide minerals, but in comparison to systems in the Taupo Volcanic Zone it contains more widely distributed pyrrhotite which is currently depositing, mainly in fractures. This reflects the high proportion of vapor in the Ngawha system. Pyrrhotite is most common in the upper part of the reservoir and lower part of the aquitard. The Ngawha pyrrhotite is of monoclinic and monoclinic + hexagonal structure.

  9. Application of a New Structural Model & Exploration Technologies to Define a Blind Geothermal System: A Viable Alternative to Grid Drilling for Geothermal Exploration: McCoy, Churchill County, NV

    Broader source: Energy.gov [DOE]

    DOE Geothermal Technologies Peer Review 2010 - Presentation. Relevance of research: Improve exploration technologies for range-hosted geothermal systems:Employ new concept models and apply existing methods in new ways; Breaking geothermal exploration tasks into new steps, segmenting the problem differently; Testing new models for dilatent structures; Utilizing shallow thermal aquifer model to focus exploration; Refining electrical interpretation methods to map shallow conductive featuresIdentifying key faults as fluid conduits; and Employ soil gas surveys to detect volatile elements and gases common to geothermal systems.

  10. Property:Geothermal/Impacts | Open Energy Information

    Open Energy Info (EERE)

    fluid pathways in fracture-dominated systems. A Demonstration System for Capturing Geothermal Energy from Mine Waters beneath Butte, MT Geothermal Project + Successful...

  11. DOE and Partners Test Enhanced Geothermal Systems Technologies...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DOE is providing 1.6 million to support the project. In addition to the current work on the sub-commercial well, the project participants are planning to use the EGS facilities at ...

  12. Geothermal Data Aggregation: Submission of Information into the

    Broader source: Energy.gov [DOE]

    Project objective: High quality information supporting geothermal research and development will be submitted to the National Geothermal Data System (NGDS).

  13. Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis

    SciTech Connect (OSTI)

    Horne, Roland N.; Li, Kewen; Alaskar, Mohammed; Ames, Morgan; Co, Carla; Juliusson, Egill; Magnusdottir, Lilja

    2012-06-30

    This report highlights the work that was done to characterize fractured geothermal reservoirs using production data. That includes methods that were developed to infer characteristic functions from production data and models that were designed to optimize reinjection scheduling into geothermal reservoirs, based on these characteristic functions. The characterization method provides a robust way of interpreting tracer and flow rate data from fractured reservoirs. The flow-rate data are used to infer the interwell connectivity, which describes how injected fluids are divided between producers in the reservoir. The tracer data are used to find the tracer kernel for each injector-producer connection. The tracer kernel describes the volume and dispersive properties of the interwell flow path. A combination of parametric and nonparametric regression methods were developed to estimate the tracer kernels for situations where data is collected at variable flow-rate or variable injected concentration conditions. The characteristic functions can be used to calibrate thermal transport models, which can in turn be used to predict the productivity of geothermal systems. This predictive model can be used to optimize injection scheduling in a geothermal reservoir, as is illustrated in this report.

  14. Advanced Horizontal Well Recirculation Systems for Geothermal Energy Recovery in Sedimentary Formations

    SciTech Connect (OSTI)

    Mike Bruno; Russell L. Detwiler; Kang Lao; Vahid Serajian; Jean Elkhoury; Julia Diessl; Nicky White

    2012-09-30

    There is increased recognition that geothermal energy resources are more widespread than previously thought, with potential for providing a significant amount of sustainable clean energy worldwide. Recent advances in drilling, completion, and production technology from the oil and gas industry can now be applied to unlock vast new geothermal resources, with some estimates for potential electricity generation from geothermal energy now on the order of 2 million megawatts. Terralog USA, in collaboration with the University of California, Irvine (UCI), are currently investigating advanced design concepts for paired horizontal well recirculation systems, optimally configured for geothermal energy recovery in permeable sedimentary and crystalline formations of varying structure and material properties. This two-year research project, funded by the US Department of Energy, includes combined efforts for: 1) Resource characterization; 2) Small and large scale laboratory investigations; 3) Numerical simulation at both the laboratory and field scale; and 4) Engineering feasibility studies and economic evaluations. The research project is currently in its early stages. This paper summarizes our technical approach and preliminary findings related to potential resources, small-scale laboratory simulation, and supporting numerical simulation efforts.

  15. Advanced Electric Submersible Pump Design Tool for Geothermal Applications

    SciTech Connect (OSTI)

    Xuele Qi; Norman Turnquist; Farshad Ghasripoor

    2012-05-31

    Electrical Submersible Pumps (ESPs) present higher efficiency, larger production rate, and can be operated in deeper wells than the other geothermal artificial lifting systems. Enhanced Geothermal Systems (EGS) applications recommend lifting 300 C geothermal water at 80kg/s flow rate in a maximum 10-5/8-inch diameter wellbore to improve the cost-effectiveness. In this paper, an advanced ESP design tool comprising a 1D theoretical model and a 3D CFD analysis has been developed to design ESPs for geothermal applications. Design of Experiments was also performed to optimize the geometry and performance. The designed mixed-flow type centrifugal impeller and diffuser exhibit high efficiency and head rise under simulated EGS conditions. The design tool has been validated by comparing the prediction to experimental data of an existing ESP product.

  16. Iceland Geothermal Conference 2013 - Geothermal Policies and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal ...

  17. Novel use of 4D Monitoring Techniques to Improve Reservoir Longevity and Productivity in Enhanced Geothermal Systems

    Broader source: Energy.gov [DOE]

    Novel use of 4D Monitoring Techniques to Improve Reservoir Longevity and Productivity in Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  18. The Viability of Sustainable, Self-Propping Shear Zones in Ehanced Geothermal Systems: Measurement of Reaction Rates at Elevated Temperatures

    Broader source: Energy.gov [DOE]

    The Viability of Sustainable, Self-Propping Shear Zones in Ehanced Geothermal Systems: Measurement of Reaction Rates at Elevated Temperatures presentation at the April 2013 peer review meeting held in Denver, Colorado.

  19. Geothermal rotary separator turbine: wellhead power system tests at Milford, Utah

    SciTech Connect (OSTI)

    Hughes, E.E.

    1983-08-01

    Through development of a separator/expander engine EPRI is improving the efficiency of single flash geothermal power systems. Under cost-shared contracts with Biphase Energy Systems and Utah Power and Light Company (UP and L), a wellhead power generating system has been built and tested. The wellhead unit has been operated for 4000 hours at Roosevelt Hot Springs near Milford, Utah. Phillips Petroleum Company operates the geothermal field at this site. The rotary separator turbine (RST) is a separating expander that increases the resource utilization efficiency by extracting power upstream of a steam turbine in either a 1-stage or 2-stage flash power system. The first power output was achieved October 28, 1981, six weeks after arrival of the RST at the site. The RST system produced 3270 MWh(e) gross and 2770 MWh(e) net to the UP and L grid. Total equivalent power produced by the wellhead RST (actual power output of the RST plus the power obtainable from the steam flow out of the RST) is 15 to 20 percent above the power that would be produced by an optimum 1-stage direct flash plant operated on the same geothermal well.

  20. A New Analytic-Adaptive Model for EGS Assessment, Development and Management Support

    SciTech Connect (OSTI)

    Danko, George L

    2014-05-29

    To increase understanding of the energy extraction capacity of Enhanced Geothermal System(s) (EGS), a numerical model development and application project is completed. The general objective of the project is to develop and apply a new, data-coupled Thermal-Hydrological-Mechanical-Chemical (T-H-M-C) model in which the four internal components can be freely selected from existing simulation software without merging and cross-combining a diverse set of computational codes. Eight tasks are completed during the project period. The results are reported in five publications, an MS thesis, twelve quarterly, and two annual reports to DOE. Two US patents have also been issued during the project period, with one patent application originated prior to the start of the project. The Multiphase Physical Transport Modeling Method and Modeling System (U.S. Patent 8,396,693 B2, 2013), a key element in the GHE sub-model solution, is successfully used for EGS studies. The Geothermal Energy Extraction System and Method" invention (U.S. Patent 8,430,166 B2, 2013) originates from the time of project performance, describing a new fluid flow control solution. The new, coupled T-H-M-C numerical model will help analyzing and designing new, efficient EGS systems.

  1. International Partnership for Geothermal Technology Launches Website |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy International Partnership for Geothermal Technology Launches Website International Partnership for Geothermal Technology Launches Website November 18, 2008 - 2:52pm Addthis Geothermal energy, with EGS, has the potential to be the world's only renewable baseload power source. It is clean, renewable and safe. The International Partnership for Geothermal Technology (IPGT) signifies the commitment of the world's geothermal energy leaders to advance the energy through the

  2. Beneficial effects of groundwater entry into liquid-dominated geothermal systems

    SciTech Connect (OSTI)

    Lippmann, M.J. ); Truesdell, A.H. )

    1990-04-01

    In all active liquid-dominated geothermal systems there is continuous circulation of mass and transfer of heat, otherwise they would slowly cool and fade away. In the natural state these systems are in dynamic equilibrium with the surrounding colder groundwater aquifers. The ascending geothermal fluids cool conductively, boil, or mix with groundwaters, and ultimately may discharge at the surface as fumaroles or hot springs. With the start of fluid production and the lowering of reservoir pressure, the natural equilibrium is disrupted and cooler groundwater tends to enter the reservoir. Improperly constructed or damaged wells, and wells located near the margins of the geothermal system, exhibit temperature reductions (and possibly scaling from mixing of chemically distinct fluids) as the cooler-water moves into the reservoir. These negative effects, especially in peripheral wells are, however, compensated by the maintenance of reservoir pressure and a reduction in reservoir boiling that might result in mineral precipitation in the formation pores and fractures. The positive effect of cold groundwater entry on the behavior of liquid-dominated system is illustrated by using simple reservoir models. The simulation results show that even though groundwater influx into the reservoir causes cooling of fluids produced from wells located near the cold-water recharge area, it also reduces pressure drawdown and boiling in the exploited zone, and sweeps the heat stored in the reservoir rocks toward production wells, thus increasing the productive life of the wells and field. 9 refs.

  3. National Geothermal Resource Assessment and Classification

    Broader source: Energy.gov [DOE]

    This work will enable lower risk/cost deployment of conventional and EGS geothermal power. USGS is also supporting GTP input to DOE National Energy Modeling by providing resource assessment data by geothermal region as input to GTP supply curves.

  4. Geothermal systems of the Mono Basin-Long Valley region, eastern California and western Nevada

    SciTech Connect (OSTI)

    Higgins, C.T.; Flynn, T.; Chapman, R.H.; Trexler, D.T.; Chase, G.R.; Bacon, C.F.; Ghusn, G. Jr.

    1985-01-01

    The region that includes Mono Basin, Long Valley, the Bridgeport-Bodie Hills area, and Aurora, in eastern California and western Nevada was studied to determine the possible causes and interactions of the geothermal anomalies in the Mono Basin-Long Valley region as a whole. A special goal of the study was to locate possible shallow bodies of magma and to determine their influence on the hydrothermal systems in the region. (ACR)

  5. Assessment of the Geothermal System Near Stanley, Idaho

    SciTech Connect (OSTI)

    Trent Armstrong; John Welhan; Mike McCurry

    2012-06-01

    The City of Stanley, Idaho (population 63) is situated in the Salmon River valley of the central Idaho highlands. Due to its location and elevation (6270 feet amsl) it is one of the coldest locales in the continental U.S., on average experiencing frost 290 days of the year as well as 60 days of below zero (oF) temperatures. Because of high snowfall (76 inches on average) and the fact that it is at the terminus of its rural grid, the city also frequently endures extended power outages during the winter. To evaluate its options for reducing heating costs and possible local power generation, the city obtained a rural development grant from the USDA and commissioned a feasibility study through author Roy Mink to determine whether a comprehensive site characterization and/or test drilling program was warranted. Geoscience students and faculty at Idaho State University (ISU), together with scientists from the Idaho Geological Survey (IGS) and Idaho National Laboratory (INL) conducted three field data collection campaigns between June, 2011 and November, 2012 with the assistance of author Beckwith who arranged for food, lodging and local property access throughout the field campaigns. Some of the information collected by ISU and the IGS were compiled by author Mink and Boise State University in a series of progress reports (Makovsky et al., 2011a, b, c, d). This communication summarizes all of the data collected by ISU including data that were compiled as part of the IGS’s effort for the National Geothermal Data System’s (NGDS) data compilation project funded by the Department of Energy and coordinated by the Arizona Geological Survey.

  6. Analysis of Low-Temperature Utilization of Geothermal Resources

    SciTech Connect (OSTI)

    Anderson, Brian

    2015-06-30

    Full realization of the potential of what might be considered “low-grade” geothermal resources will require that we examine many more uses for the heat than traditional electricity generation. To demonstrate that geothermal energy truly has the potential to be a national energy source we will be designing, assessing, and evaluating innovative uses for geothermal-produced water such as hybrid biomass-geothermal cogeneration of electricity and district heating and efficiency improvements to the use of cellulosic biomass in addition to utilization of geothermal in district heating for community redevelopment projects. The objectives of this project were: 1) to perform a techno-economic analysis of the integration and utilization potential of low-temperature geothermal sources. Innovative uses of low-enthalpy geothermal water were designed and examined for their ability to offset fossil fuels and decrease CO2 emissions. 2) To perform process optimizations and economic analyses of processes that can utilize low-temperature geothermal fluids. These processes included electricity generation using biomass and district heating systems. 3) To scale up and generalize the results of three case study locations to develop a regionalized model of the utilization of low-temperature geothermal resources. A national-level, GIS-based, low-temperature geothermal resource supply model was developed and used to develop a series of national supply curves. We performed an in-depth analysis of the low-temperature geothermal resources that dominate the eastern half of the United States. The final products of this study include 17 publications, an updated version of the cost estimation software GEOPHIRES, and direct-use supply curves for low-temperature utilization of geothermal resources. The supply curves for direct use geothermal include utilization from known hydrothermal, undiscovered hydrothermal, and near-hydrothermal EGS resources and presented these results at the Stanford Geothermal Workshop. We also have incorporated our wellbore model into TOUGH2-EGS and began coding TOUGH2-EGS with the wellbore model into GEOPHIRES as a reservoir thermal drawdown option. Additionally, case studies for the WVU and Cornell campuses were performed to assess the potential for district heating and cooling at these two eastern U.S. sites.

  7. Geothermal Direct Use Technology & Marketplace Workshop Summary

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... a closed loop geothermal system requires no new water. ... Technology and Engineering Research, Development, ... 10:45 a.m. - Geothermal Deep Direct Use Technology ...

  8. The Geothermal Technologies Office

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Technologies Office (GTO) funded and launched the NGDS and the DOE Geothermal Data Repository node to facilitate a seamless delivery of geotherm- al data for a variety of applications. NGDS is an interoperable networked system of distributed data repositories, accessed through federated catalog nodes and built upon an open architecture using open source software practices. The system provides access to geo- thermal data from providers across the U.S., including all 50 state geological

  9. Geothermal Energy Projects | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy ...

  10. Geothermal Heat Pump System for the New 500-bed 200,000 SF Student Housing Project at the University at Albanys Main Campus

    Broader source: Energy.gov [DOE]

    This project proposes to heat and cool planned 500-bed apartment-style student housing with closed loop vertical bore geothermal heat pump system installation.

  11. Geothermal Economics Calculator (GEC) - additional modifications to final report as per GTP's request.

    SciTech Connect (OSTI)

    Gowda, Varun; Hogue, Michael

    2015-07-17

    This report will discuss the methods and the results from economic impact analysis applied to the development of Enhanced Geothermal Systems (EGS), conventional hydrothermal, low temperature geothermal and coproduced fluid technologies resulting in electric power production. As part of this work, the Energy & Geoscience Institute (EGI) has developed a web-based Geothermal Economics Calculator (Geothermal Economics Calculator (GEC)) tool that is aimed at helping the industry perform geothermal systems analysis and study the associated impacts of specific geothermal investments or technological improvements on employment, energy and environment. It is well-known in the industry that geothermal power projects will generate positive economic impacts for their host regions. Our aim in the assessment of these impacts includes quantification of the increase in overall economic output due to geothermal projects and of the job creation associated with this increase. Such an estimate of economic impacts of geothermal investments on employment, energy and the environment will also help us understand the contributions that the geothermal industry will have in achieving a sustainable path towards energy production.

  12. Newberry EGS Seismic Velocity Model

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Templeton, Dennise

    2013-10-01

    We use ambient noise correlation (ANC) to create a detailed image of the subsurface seismic velocity at the Newberry EGS site down to 5 km. We collected continuous data for the 22 stations in the Newberry network, together with 12 additional stations from the nearby CC, UO and UW networks. The data were instrument corrected, whitened and converted to single bit traces before cross correlation according to the methodology in Benson (2007). There are 231 unique paths connecting the 22 stations of the Newberry network. The additional networks extended that to 402 unique paths crossing beneath the Newberry site.

  13. Enhanced Geothermal System Potential for Sites on the Eastern Snake River Plain, Idaho

    SciTech Connect (OSTI)

    Robert K Podgorney; Thomas R. Wood; Travis L McLing; Gregory Mines; Mitchell A Plummer; Michael McCurry; Ahmad Ghassemi; John Welhan; Joseph Moore; Jerry Fairley; Rachel Wood

    2013-09-01

    The Snake River volcanic province overlies a thermal anomaly that extends deep into the mantle and represents one of the highest heat flow provinces in North America (Blackwell and Richards, 2004). This makes the Snake River Plain (SRP) one of the most under-developed and potentially highest producing geothermal districts in the United States. Elevated heat flow is typically highest along the margins of the topographic SRP and lowest along the axis of the plain, where thermal gradients are suppressed by the Snake River aquifer. Beneath this aquifer, however, thermal gradients rise again and may tap even higher heat flows associated with the intrusion of mafic magmas into the mid-crustal sill complex (e.g., Blackwell, 1989).

  14. Hydrology of the Geothermal System in Long Valley Caldera, California...

    Open Energy Info (EERE)

    System in Long Valley Caldera, California Abstract Abstract unavailable. Author Michael L. Sorey Published Unpublished report for the Long Valley Hydrologic Advisory Committee,...

  15. Geothermal District Heating System City of Klamath Falls | Open...

    Open Energy Info (EERE)

    The system is not geologically homogeneous. Great variations in horizontal permeability and many vertical discontinuities exist because of stratigraphy and structure of...

  16. Conduction-Dominated Geothermal Systems | Open Energy Information

    Open Energy Info (EERE)

    systems are subdivided into three play types based on the natural porosity-permeability ratio within the potential reservoir rock, and the absence or presence of...

  17. Demonstration of an Enhanced Geothermal System at the Northwest...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Other objectives are to investigate how cold-water injection mechanically and chemically affects fractured high temperature rock systems; demonstrate the technology to monitor and ...

  18. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At International Geothermal Area, Iceland (Ranalli & Rybach, 2005)...

  19. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At International Geothermal Area, New Zealand (Ranalli & Rybach, 2005)...

  20. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At International Geothermal Area, Italy (Ranalli & Rybach, 2005) Exploration...

  1. Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade

    SciTech Connect (OSTI)

    Liu, Xiaobing

    2014-06-01

    High initial cost and lack of public awareness of ground source heat pump (GSHP) technology are the two major barriers preventing rapid deployment of this energy saving technology in the United States. Under the American Recovery and Reinvestment Act (ARRA), 26 GSHP projects have been competitively selected and carried out to demonstrate the benefits of GSHP systems and innovative technologies for cost reduction and/or performance improvement. This paper highlights findings of a case study of one of the ARRA-funded GSHP demonstration projects, which is a heating only central GSHP system using shallow aquifer as heat source and installed at a warehouse and truck bay at Kalispell, MT. This case study is based on the analysis of measured performance data, utility bills, and calculations of energy consumptions of conventional central heating systems for providing the same heat outputs as the central GSHP system did. The evaluated performance metrics include energy efficiency of the heat pump equipment and the overall GSHP system, pumping performance, energy savings, carbon emission reductions, and cost-effectiveness of GSHP system compared with conventional heating systems. This case study also identified areas for reducing uncertainties in performance evaluation, improving operational efficiency, and reducing installed cost of similar GSHP systems in the future. Publication of ASHRAE at the annual conference in Seattle.

  2. 2014 Annual Report, Geothermal Technologies Office | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4 Annual Report, Geothermal Technologies Office 2014 Annual Report, Geothermal Technologies Office A DOE-funded EGS demonstration at Newberry Volcano, Oregon could help unlock 100+GW of geothermal energy nationwide. source: Elisabet Metcalfe A DOE-funded EGS demonstration at Newberry Volcano, Oregon could help unlock 100+GW of geothermal energy nationwide. source: Elisabet Metcalfe The Energy Department's 2014 Geothermal Technologies Office (GTO) Annual Report-a product of the Office of Energy

  3. Characteristics of Basin and Range Geothermal Systems with Fluid...

    Open Energy Info (EERE)

    of 150-200C have been discovered in the northern Basin and Range Province of the USA. A comparison of these high and moderate temperature systems shows considerable overlap...

  4. Geothermal Technologies Program Multi-Year Research, Development and Demonstration Plan: Systems Integration

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Geothermal Technologies Program Multi-Year Research, Development and Demonstration Plan presents the status of geothermal energy technologies and details program plans from 2009 through 2015, with program activities through 2025.

  5. National Geothermal Resource Assessment and Classification |...

    Broader source: Energy.gov (indexed) [DOE]

    will enable lower riskcost deployment of conventional and EGS geothermal power. USGS is also supporting GTP input to DOE National Energy Modeling by providing resource assessment...

  6. Temporary Bridging Agents for use in Drilling and Completion of Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Watters, Larry; Watters, Jeff; Sutton, Joy; Combs, Kyle; Bour, Daniel; Petty, Susan; Rose, Peter; Mella, Michael

    2011-12-21

    CSI Technologies, in conjunction with Alta Rock Energy and the University of Utah have undergone a study investigating materials and mechanisms with potential for use in Enhanced Geothermal Systems wells as temporary diverters or lost circulation materials. Studies were also conducted with regards to particle size distribution and sealing effectiveness using a lab-scale slot testing apparatus to simulate fractures. From the slot testing a numerical correlation was developed to determine the optimal PSD for a given fracture size. Field trials conducted using materials from this study were also successful.

  7. Faults and gravity anomalies over the East Mesa hydrothermal-geothermal system

    SciTech Connect (OSTI)

    Goldstein, N.E.; Carle, S.

    1986-05-01

    Detailed interpretations of gravity anomalies over geothermal systems may be extremely useful for mapping the fracture or fault systems that control the circulation of the thermal waters. This approach seems to be particularly applicable in areas like the Salton Trough where reactions between the thermal waters and the porous sediments produce authigenic-hydrothermal minerals in sufficient quantity to cause distinct gravity anomalies at the surface. A 3-D inversion of the residual Bouguer gravity anomaly over the East Mesa geothermal field was made to examine the densified volume of rock. We show that the data not only resolve a north-south and an intersecting northwest structure, but that it may be possible to distinguish between the active present-day hydrothermal system and an older and cooler part of the system. The densified region is compared spatially to self-potential, thermal and seismic results and we find a good concordance between the different geophysical data sets. Our results agree with previous studies that have indicated that the main feeder fault recharging the East Mesa reservoir dips steeply to the west.

  8. Continuous on-line steam quality monitoring system of the Bacman Geothermal Production Field, Philippines

    SciTech Connect (OSTI)

    Solis, R.P.; Chavez, F.C.; Garcia, S.E.

    1997-12-31

    In any operating geothermal power plant, steam quality is one of the most important parameters being monitored. In the Bacon-Manito Geothermal Production Field (BGPF), an online steam quality monitoring system have been installed in two operating power plants which provides an accurate, efficient and continuous real-time data which is more responsive to the various requirements of the field operation. The system utilizes sodium as an indicator of steam purity. Sodium concentration is read by the flame photometer located at the interface after aspirating a sample of the condensed steam through a continuous condensate sampler. The condensate has been degassed through a condensate-NCG separator. The flame photometer analog signal is then converted by a voltage-to-current converter/transmitter and relayed to the processor which is located at the control center through electrical cable to give a digital sodium concentration read-out at the control panel. The system features a high and high-high sodium level alarm, a continuous strip-chart recorder and a central computer for data capture, retrieval, and processing for further interpretation. Safety devices, such as the flame-off indicator at the control center and the automatic fuel cut-off device along the fuel line, are incorporated in the system.

  9. Design and Implementation of Geothermal Energy Systems at West Chester University

    SciTech Connect (OSTI)

    Greg Cuprak

    2011-08-31

    West Chester University is launching a comprehensive transformation of its campus heating and cooling systems from traditional fossil fuels (coal, oil and natural gas) to geothermal. This change will significantly decrease the institution's carbon footprint and serve as a national model for green campus efforts. The institution is in the process of designing and implementing this project to build well fields, a pumping station and install connecting piping to provide the geothermal heat/cooling source for campus buildings. This project addresses the US Department of Energy Office of Energy Efficiency and Renewable Energy (EERE) goal to invest in clean energy technologies that strengthen the economy, protect the environment, and reduce dependence on foreign oil. In addition, this project advances EERE's efforts to establish geothermal energy as an economically competitive contributor to the US energy supply. For this grant, WCU will extend piping for its geo-exchange system. The work involves excavation of a trench approximately 8 feet wide and 10-12 feet deep located about 30 feet north of the curb along the north side of West Rosedale for a distance of approximately 1,300 feet. The trench will then turn north for the remaining distance (60 feet) to connect into the mechanical room in the basement of the Francis Harvey Green Library. This project will include crossing South Church Street near its intersection with West Rosedale, which will involve coordination with the Borough of West Chester. After installation of the piping, the trench will be backfilled and the surface restored to grass as it is now. Because the trench will run along a heavily-used portion of the campus, it will be accomplished in sections to minimize disruption to the campus as much as possible.

  10. Modelling Studies of the Evolution of Vapour-Dominated Geothermal Systems

    SciTech Connect (OSTI)

    Pestov, I.

    1995-01-01

    Numerical experiments, based on linear stability results, are invoked to model the evolution of two-phase vapor-dominated zones within geothermal systems. A reservoir model with all boundaries impermeable to fluid flow and a uniform heat flux at the bottom boundary is used. The results obtained show that different steady-states are accessible along different quasi-static paths from the same initial vapor-dominated steady-state. Thus, the realization of a steady-state with a two-phase vapor-dominated zone overlying a single-phase hot water region can indicate that the geothermal system undergoes a process of slow cooling. A steady-state with a two-phase vapor-dominated zone overlying a single-phase vapor region can be formed either as a result of slow heating or as a result of a reduction in permeability. A steady-state with an upper vapor-dominated part and a lower liquid-dominated part can occur if permeability of the system has been gradually increased.

  11. Accelerating Geothermal Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-05-01

    Geothermal research at the National Renewable Energy Laboratory (NREL) is advancing geothermal technologies to increase renewable power production. Continuous and not dependent on weather, the geothermal resource has the potential to jump to more than 500 gigawatts in electricity production, which is equivalent to roughly half of the current U.S. capacity. Enhanced geothermal systems have a broad regional distribution in the United States, allowing the potential for development in many locations across the country.

  12. Stragegies to Detect Hidden Geothermal Systems Based on Monitoringand Analysis of CO2 in the Near-Surface Environment

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2005-03-29

    We investigate the potential for CO2 monitoring in thenear-surface environment as an approach to exploration for hiddengeothermal systems. Numerical simulations of CO2 migration from a modelhidden geothermal system show that CO2 concentrations can reach highlevels in the shallow subsurface even for relatively low CO2 fluxes.Therefore, subsurface measurements offer an advantage over above-groundmeasurements which are affected by winds that rapidly disperse CO2. Tomeet the challenge of detecting geothermal CO2 emissions within thenatural background variability of CO2, we propose an approach thatintegrates available detection and monitoring techniques with statisticalanalysis and modeling.

  13. The Northwest Geysers EGS Demonstration Project, California. Pre-stimulation Modeling and Interpretation of the Stimulation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Rutqvist, Jonny; Dobson, Patrick F.; Garcia, Julio; Hartline, Craig; Jeanne, Pierre; Oldenburg, Curtis M.; Vasco, Donald W.; Walters, Mark

    2013-10-17

    The Northwest Geysers Enhanced Geothermal System (EGS) demonstration project aims to create an EGS by directly and systematically injecting cool water at relatively low pressure into a known High Temperature (280–400 °C) Zone (HTZ) located under the conventional (240 °C) geothermal steam reservoir at The Geysers geothermal field in California. Here we report that , the results of coupled thermal, hydraulic, and mechanical (THM) analyses made using a model developed as part of the pre-stimulation phase of the EGS demonstration project is presented. The model simulations were conducted in order to investigate injection strategies and the resulting effects of cold-watermore » injection upon the EGS system; in particular to predict the extent of the stimulation zone for a given injection schedule. The actual injection began on October 6, 2011, and in this paper a comparison of pre-stimulation model predictions with micro-earthquake (MEQ) monitoring data over the first few months of a one-year injection program is presented. The results show that, by using a calibrated THM model based on historic injection and MEQ data at a nearby well, the predicted extent of the stimulation zone (defined as a zone of high MEQ density around the injection well) compares well with observed seismicity. The modeling indicates that the MEQ events are related to shear reactivation of preexisting fractures, which is triggered by the combined effects of injection-induced cooling around the injection well and small changes in steam pressure as far as half a kilometer away from the injection well. Pressure-monitoring data at adjacent wells and satellite-based ground-surface deformation data were also used to validate and further calibrate reservoir-scale hydraulic and mechanical model properties. The pressure signature monitored from the start of the injection was particularly useful for a precise back-calculation of reservoir porosity. Ultimately, the first few months of reservoir pressure and surface deformation data were useful for estimating the reservoir-rock permeability and elastic modulus. Finally, although the extent of the calculated stimulation zone matches the field observations over the first few months of injection, the observed surface deformations and MEQ evolution showed more heterogeneous behavior as a result of more complex geology, including minor faults and fracture zones that are important for consideration in the analysis of energy production and the long-term evolution of the EGS system.« less

  14. Geothermal Regulatory Roadmap | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Regulatory Roadmap Geothermal Regulatory Roadmap Geothermal Regulatory Roadmap presentation at the April 2013 peer review meeting held in Denver, Colorado. PDF icon grr_peer2013.pdf More Documents & Publications track 1: systems analysis | geothermal 2015 peer review Geothermal Technologies Program Annual Peer Review Presentation By Doug Hollett Validation of Innovation Exploration Technologies for Newberry Volcano

  15. Geothermal Technologies Program Multi-Year Research, Development...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Systems Integration Geothermal Technologies Program Multi-Year Research, Development and Demonstration Plan: Systems Integration The Geothermal Technologies Program Multi-Year ...

  16. A Technology Roadmap for Strategic Development of Enhanced Geothermal...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems A Technology Roadmap for Strategic Development of Enhanced Geothermal Systems DOE Project Partner ...

  17. NREL: Renewable Resource Data Center - Geothermal Resource Related Links

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Related Links Comprehensive geothermal resource information is also available from the following sources: U.S. Department of Energy Geothermal Technologies Office. National Geothermal Data System A portal to geothermal data. Southern Methodist University Geothermal Laboratory The Laboratory supplies vital information on the renewable energy source tapped from the Earth's internal heat. Printable Version RReDC Home Biomass Resource Information Geothermal Resource Information Geothermal Data

  18. Predicting the spatial extent of injection-induced zones of enhanced permeability at the Northwest Geysers EGS Demonstration Project

    SciTech Connect (OSTI)

    Rutqvist, J.; Oldenburg, C.M.; Dobson, P.F.

    2010-02-01

    We present the results of coupled thermal, hydraulic, and mechanical (THM) modeling of a proposed stimulation injection associated with an Enhanced Geothermal System (EGS) demonstration project at the northwest part of The Geysers geothermal field, California. The project aims at creating an EGS by directly and systematically injecting cool water at relatively low pressure into a known High Temperature (about 280 to 350 C) Zone (HTZ) located under the conventional (240 C) steam reservoir at depths below 3 km. Accurate micro-earthquake monitoring from the start of the injection will be used as a tool for tracking the development of the EGS. We first analyzed historic injection and micro-earthquake data from an injection well (Aidlin 11), located about 3 miles to the west of the new EGS demonstration area. Thereafter, we used the same modeling approach to predict the likely extent of the zone of enhanced permeability for a proposed initial injection in two wells (Prati State 31 and Prati 32) at the new EGS demonstration area. Our modeling indicates that the proposed injection scheme will provide additional steam production in the area by creating a zone of permeability enhancement extending about 0.5 km from each injection well which will connect to the overlying conventional steam reservoir.

  19. Energy 101: Geothermal Energy | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Geothermal Energy Energy 101: Geothermal Energy

  20. Geothermal Energy Retrofit

    SciTech Connect (OSTI)

    Bachman, Gary

    2015-07-28

    The Cleary University Geothermal Energy Retrofit project involved: 1. A thermal conductivity test; 2. Assessment of alternative horizontal and vertical ground heat exchanger options; 3. System design; 4. Asphalt was stripped from adjacent parking areas and a vertical geothermal ground heat exchanger system installed; 5. the ground heat exchanger was connected to building; 6. a system including 18 heat pumps, control systems, a manifold and pumps, piping for fluid transfer and ductwork for conditioned air were installed throughout the building.