This node provides geothermal resources from the Energy & Geoscience Institute (EGI) at the University of Utah, home to leading experts in the fields of geology, geophysics, geochemistry, and engineering. It is the world’s largest University based industry cost-shared upstream E&P research program of its kind, with 65+ Corporate Associate members representing 20 countries.
The SMU Geothermal Lab is an active research facility with a variety of ongoing geothermal resource projects which strive to broaden the understanding and use of geothermal energy, from the simplest form - geothermal heat pumps for buildings, to the large-scale deployment of geothermal power plants providing energy for our cities while also exploring opportunities to integrate renewable geothermal projects in an oil & gas setting.
The US Geoscience Information Network Geothermal Catalog provides resources from various data partners including the AASG State Geothermal Data Repository, the Canadian Geothermal Energy Association, and the Stanford Geothermal Workshop proceedings.
Bibliography of information on Alaska volcanoes. Please see the Alaska Department of Natural Resources publication sales page for information on ordering data on DVD at http://www.dggs.alaska.gov/publications/publication-sales.php.
Fugro Gravity and Magnetics Services (Houston) with Fugro Electro Magnetics Italy Srl carried out a full tensor, broadband magnetotelluric survey of 59 soundings under contract from University of Alaska. Two MT field teams deployed up to 3 MT systems each (ADU-07e Metronix receivers and sensors) for overnight recording, thus producing up to 6 MT soundings per day. Fieldwork was completed between August 13 and August 28, 2012. Inversion for 3D resistivity structure was performed using the Fugro RLM-3D MT code. Full tensor complex impedances were inverted in the frequency range from 0.032 Hz to 5.62 kHz, using 4 frequencies per decade, on a 384 core cluster. Both unconstrained (blind) and constrained inversions were carried out. For the constrained inversion, the starting and a priori model in 3D inversions included shallow structure from resistivity-depth maps obtained from the Resolve airborne EM survey, conducted by Fugro Airborne Surveys Corp., Mississauga, Canada. Report 78 pages, Append. A-D. 50 Figures, 8 Tables.
This resource is a metadata compilation of bibliographic references related to Alaskan geothermal research activity. This compilation includes 37 documents delivered to the US DOE Office of Scientific and Technical Information as OSTI scanned documents, as well as to the AASG Geothermal Data Project. Document topics include geochemistry, geothermal potential, energy alternatives, thermal studies, and faults and other structures for the state of Alaska. The Excel workbook contains 6 worksheets, including information about the template, notes related to revisions of the template, Resource provider information, the data, a field list (data mapping view) and vocabularies for use in populating the data worksheet (data valid terms). This resource was compiled by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.
This information represents a digital version of the polygon units shown on "Bedrock Geologic Map of Wisconsin," originally published in 1982 at a scale of 1:1,000,000. The bedrock geology shown is a lithostratigraphic interpretation of the consolidated (rock) units present at the land surface or, in most areas, the first consolidated (rock) unit encountered beneath variable thicknesses of unconsolidated glacial sediment. The data include not only the distribution of the various bedrock units, but also a general description of the lithologic character and nomenclatural identification. This dataset provides users with a digital representation of the distribution of the bedrock units in Wisconsin and should not be used for site-specific geologic assessment.
This resource is an ArcMap Package of Features in Alaska: Thermal Springs, Direct Use Sites, Geothermal Wells, Other wells, Bottom hole Temperatures, Aqueous Geochemistry, Free Gas, Isotopes, Earthquakes near Hot Springs, Volcanic Vents Holocene, Quaternary Faults, Pre Quaternary Faults, Volcanic Rocks, Geology, Late Tertiary and Quaternary Sedimentary Basins, cities, DOT Road System, major rivers, Depth to Permafrost, State_waters_line NS, Census areas boroughs, akneds, Cultural, Alaska Place Names POINT, Basemap. A total of 8505 data points are listed, not including the basemap and road layers, etc., listed at the end of the data types. This resource was provided by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.
This resource is a compilation of a specific suite of aqueous chemistry for Alaska thermal groundwater, tailored for use in the geothermometry model formulated by Powell and Cumming, 2010. Analytes reported can be directly input into their model, which displays ternary diagrams to interpret potential source and temperatures of thermal waters based on chemistry and other parameters. Citation: Powell, Tom and Cumming, William 2010. Spreadsheets for Geothermal Water and Gas Geochemistry. Thirty-Fifth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 1-3, 2010. SGP-TR-188 (http://repository.stategeothermaldata.org/repository/resource/9e15e1a59b768b330d029e86dc023a37/). The data are available in the following formats: web feature service, web map service, ESRI MapServer, and an Excel workbook for download. The workbook contains 4 worksheets, including information about the template with notes related to revisions of the template, resource provider information, the data and a field list (to assist data mapping). This resource was provided by the Alaska Division of Geological and Geophysical Surveys and made available for distribution through the National Geothermal Data System.
The Rotary Separator Turbine (RST) is a concept of Biphase Energy Systems that has been developed for geothermal applications by Biphae and the Electric Power Research Institute (EPRI). The RST can provide an efficient method for extracting energy from geopressured brines. In this application the RST would develop shaft power from the thermal and pressure energy of the brine and would recovery chemical energy as methane available for distribution. A comparative analysis of conceptual designs for an RST system and a two stage flash system indicates that ht RST system could deliver electricity at a cost about seven percent lower than a two stage flash system. Use of the Biphase Rotary Separator may result in more complete recovery of methane e than is possible with gravity gas liquid separators.
Petrologic data has been used to determine the stratigraphical changes, mineral zoning, thermal history and permeability in Berlin geothermal field. Petrographic and mineralogical analyses showed that the caprock at wells TR-17 and TR-18 is found at higher elevation (500 masl to sea level), composed of altered fine tuff and ignimbritic deposits, confirming the vertical displacement of the Berlin caldera.Past and present thermal regimes were identified using microthermometry of fluid inclusions in different crystals. Measurement at depths indicated a temperature reversal of 256 258C in wells TR-17 and TR-18, where temperature of homogenization (Th) obtained a maximum temperature of 346C.Geochemical data was plotted in variation diagrams to see the trend of the major oxides and relate to the hydrothermal alteration processes.This paper will focus on the five production wells (TR-17, TR-17A, TR-17B, TR-18 and TR-18A) at the southern part of the field.
Low-enthalpy geothermal resources have not been utilized to their potential in the past. However, since vast tracts of low-enthalpy geothermal resources exist as energy in the form of differential temperatures, the reserves are estimated to be enormous. As a result, there is growing interest in using this untapped energy in order to reduce carbon dioxide emissions which are the main cause for global warming, one of todays most serious issues as addressed by the U.S. Department of Energy and Environmental Protection Agency documents.
A 1:62,500-scale, full-color Geologic Map of the Mount Rose 15-Minute Quadrangle in Washoe County, Nevada, with description of 29 units.To show a 1:62,500-scale, full-color Geologic Map of the Mount Rose 15-Minute Quadrangle in Washoe County, Nevada, with description of 29 units. The GIS work was in support of the U. S. Geological Survey COGEOMAP program. The Geodatabase specifies feature datasets and feature classes, together with feature attributes, subtypes and domains, suitable for the printed geologic map. In addition to basic geology (lithology, contacts and faults, etc.), the maps may include metamorphic overprints, cross-sections, and explanatory legend-graphics such as correlation charts, used to supplement columnar legends.
This paper examines electrical planning required for successful geothermal electrical power generation projects. The importance of examining the impact of a proposed new generator connection on the operational performance of the existing electrical power system is outlined. Also discussed are electrical engineering design problems that can be encountered and solutions that have been used to enable operation in a geothermal environment.
Today, geothermal energy is known as one of the most reliable alternative renewable energy source and has been proved to be technically and economically feasible. Geothermal electricity is generated from geothermal energy. Several modes of technology are used to convert the geothermal energy into electricity but the paper will focus on wellhead generation technology. Kenya has been focusing on the generation of power to meet its acute power shortage and ever rising demand. Traditionally KenGen has used conventional power plants which involve months of well drilling and years of central power plant construction. The wellhead technology seeks to take advantage the idle time between completion of drilling and the start and finish of the central power plant construction. It yields an overlapping concept that harvests the capped steam as soon as it is available for immediate power and revenue generation prior to the central power plant completion. KenGen being the countryis leading power producer has embraced the use of wellhead generators in geothermal thus realizing early power generation. Wellhead Technology has a modular approach which connects wells with outputs of up to 15MW. The modular approach allows for a combination of wells using short streamlines instead of the traditional long lines which are very costly and take much longer to construct. The modules form clusters which generate power through the convectional mode of steam running turbines. The power is then directly fed into the grid. As a result, wellhead technology has enabled KenGen gain an edge over the following challenges: Immediate power supply to address its rising demand. Due to its low capital cost and immediate utilization the company has been able to borrow capital and repay almost immediately unlike the traditional mode that takes close to a year before the repayment plan kicks off. This minimizes interest gains on loan. Reduced cost of power generation i.e. steam fields. Power plant portability which taps into isolated and remote areas. Higher revenue collection from the attractive wellhead feed-in tariff as compared to the conventional PPAs. Modular approach enhances access to small value loans thus appealing to small and medium scale investors. This paper seeks to address the wellhead (early generation) concept and KenGen experience in deploying this revolutionary technology.