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New Mexico Southwest Regional Geothermal Development Operations Research Project. Appendix 9 of regional operations research program for development of geothermal energy in the Southwest United States. Final technical report, June 1977--August 1978

Description: This final report describes the findings and conclusions of the New Mexico Team during the first project year of the Southwest Regional Geothermal Development Operations Research Project. The purpose of this project is to help realize a goal of the USDOE , Division of Geothermal Energy (DOE/DGE), to accelerate the actual commercial utilization of geothermal energy. This was done by: (1) identifying the potential for development of geothermal energy in the five-state regions of Arizona, Colorado, New Mexico, Nevada and Utah; and (2) identifying the actions needed to accomplish that development.
Date: January 1, 1979
Creator: Ortiz, Thomas A. & Fedor, Dennis
Partner: UNT Libraries Government Documents Department

Refraction shooting near Roosevelt Hot Springs: Data. Final report, Volume 77-4

Description: Under a contract dated April 6, 1977, with the University of Utah, MicroGeophysics Corporation has completed a large-scale refraction program over the geothermal anomaly at Roosevelt Hot Springs in north-central Utah. This report contains the data as required by that contract and is submitted to fulfill the obligations of that contract.
Date: December 1, 1977
Partner: UNT Libraries Government Documents Department

Long-term seismic monitoring of the Roosevelt - Cove Fort KGRA's

Description: Earthquake monitoring of the Roosevelt-Cove Fort Hot Springs KGRA's was implemented by installation of three RF telemetered, vertical component, seismograph stations: CFU, MNU and RHU. These station sites were selected on the basis of proximity to the KGRA's, with respect to known earthquake activity determined in the microearthquake surveys. The three permanent stations form the basic long-term monitoring capability of the Roosevelt-Cove Fort KGRA's. The signals are FM transmitted to a collecting site near Milford then they are telephone-transmitted to the University of Utah campus for recording. The limitations of only three-stations precludes accurate hypocenter determinations but allows detection to a minimum threshold of about M-0.5 for close-in events. Locations can be determined for earthquakes of about M-0.7 or greater. Regional coverage of the south-central Utah KGRA's is supplemented by the use of other existing University of Utah stations to the east: MSU, PUU, and RFU. Together the six stations allow long-term detection of this geothermally active region.
Date: December 1, 1977
Creator: Smith, Robert B.
Partner: UNT Libraries Government Documents Department

Report on Geothermal Power Plant Cost and Comparative Cost of Geothermal and Coal Fired Steam Power Plants

Description: This report is to be used by Utah Power and Light Company (UP and L) in making studies of geothermal power plants. The dollars per kilowatt comparison between a geothermal plant and a UP and L coal-fired plant is to be developed. Geothermal gathering system costs and return to owner are to be developed for information.
Date: July 1, 1977
Partner: UNT Libraries Government Documents Department

Geothermal reconnaissance of a portion of the Escalante Valley, Utah

Description: The exploration techniques employed during the study included: (1) Temperature survey of selected wells and springs; (2) Chemical analysis of fluids from selected wells and springs; and (3) Temperature-depth measurements of selected holes of opportunity.
Date: July 1, 1982
Creator: Klauk, R.H.; Foreman, M.B. & Gourley, C.
Partner: UNT Libraries Government Documents Department

Monroe, Utah, Hydrothermal System: Results from Drilling of Test Wells MC1 and MC2

Description: Following detailed geological (Parry et al., 1976; Miller, 1976) and geophysical (Mase, Chapman, and Ward, 1978; Kilty, Mase, and Chapman, 1978) studies of the Monroe, Utah hydrothermal system, a program of drilling two intermediate depth test wells was undertaken. The objectives of the test well drilling were three-fold: (1) to obtain structural information bearing on the poorly known dip of the Sevier Fault, (2) to obtain temperature information below the shallow depths (approximately 300 ft.) sampled in the first phase of exploration, and (3) to provide cased wells which could act as monitor wells during the production phase of the project. The test well drilling was seen to be vital to the selection of a site for a production well. This report describes the results from the drilling of the two test wells, designated MC1 and MC2, and offers interpretation of the hydrothermal system which may be used as a basis for selecting production wells.
Date: October 1, 1978
Creator: Chapman, D.S. & Harrison, Roger
Partner: UNT Libraries Government Documents Department

Utah State Prison Space Heating with Geothermal Heat First Semi-Annual Report for the Period 14 March 1979 - 14 June 1980

Description: Reported herein is a summary of the work conducted during the first year of the contract under a project to develop the Crystal Hot Springs geothermal resource to provide space and hot water heating for the Minimum Security Building portion of the Utah State Prison. Efforts during the project to date have been directed towards resource assessment. progress includes completion of the environmental impact report, conclusion of resource geophysical surveys (gravity and magnetic), and preliminary modeling of the subsurface structural configuration in the vicinity of the resource based upon the results of the geophysical surveys.
Date: July 1, 1980
Creator: Blair, C.K.
Partner: UNT Libraries Government Documents Department

Well cost estimates in various geothermal regions

Description: A project to estimate well costs in regions of current geothermal activity has been initiated. Costs associated with commonly encountered drilling problems will be included. Activity-based costing techniques will be employed to allow the identification of cost drivers and the evaluation of the economic effects of new technologies and operational procedures on well costs. The sensitivity of well costs to a number of parameters such as rate-of-penetration and daily operating costs will be examined. Additional sensitivity analyses and trade-off studies will evaluate the efficiency of various operational practices and preventive, as well as remedial, actions. These efforts should help provide an understanding of the consumption of resources in geothermal drilling.
Date: June 1, 1997
Creator: Pierce, K.G.; Bomber, T.M. & Livesay, B.J.
Partner: UNT Libraries Government Documents Department

Final Report, Volume 77-5

Description: This report covers the following Tasks: Task 76.1.21--Color photos: Stereo color aerial photographs were made available to industry for copying at industry's expense on November 28, 1977 at 11:00 a.m. This final report on this task merely records that fact. Task 77.1.14--Proposal Review (MOD A002)--All activities under this task have been completed. No tangible deliverables were required. Task 76.1.14--Simultaneous modeling of multiple data sets: A technique for simultaneous inversion of MT and Schlumberger data was developed and tested on some available deep crustal data from South Africa. The publication resulting and included herewith is: 'Ridge Regression Inversion Applied to Crustal Resistivity Sounding Data from South Africa', Geophysics, Volume 42, No.5, pages 995-1005. Joint inversion of Schlumberger and electromagnetic sounding data was developed and applied to geothermal data from Roosevelt Hot Springs KGRA. The publication resulting and included herewith is: 'Electromagnetic and Schlumberger Resistivity Sounding in the Roosevelt Hot Springs KGRA', Geophysics, in press. To utilize multiple inversion schemes at a convective hydrothermal system in the Eastern Great Basin will require applications of three-dimensional forward algorithms now available for gravity, magnetics, and AMT/MT. Unfortunately the pertinent data sets available for Roosevelt Hot Springs KGRA (or Monroe Hot Springs KGRA, for that matter) are not compatible since the physical property distributions giving rise to the gravity field is not coincident with that giving rise to the magnetic field, and so on. Thus, they have turned to interpreting each data set independently and then drawing a schematic model of the subsurface which accepts all data sets. An example of this procedure is contained in 'Geophysics of the Roosevelt Hot Springs Thermal Area, Utah', submitted to Geology and included in Final Report Volume 77-2. Task 76.1.11--Drill and Log 10 Heat Flow Holes: All thermal gradients and heat flows appear in Technical Report 77-3. The ...
Date: December 1, 1977
Creator: Ward, S.H. & Whelan, J.A. (and others)
Partner: UNT Libraries Government Documents Department

A thermal resistance method for computing surface heat flow and subsurface temperatures with application to the Uinta Basin of northeastern Utah

Description: The thermal resistance method has been modified to test the utility of oil and gas well bottom-hole temperature data in determining heat flow and subsurface temperature patterns. Thermal resistance, defined as the quotient of a depth parameter '{Delta}{sub z}' and thermal conductivity 'k'', governs subsurface temperatures as follows: T{sub B} = T{sub 0} + q{sub 0} B {summation} z=0 ({Delta}z/k){sub i} where T{sub B} is the temperature at depth z = B, T{sub 0} is the surface temperature, q{sub 0} is surface heat flow and the thermal resistance ({Delta}z/k) is summed for all lithological units between the surface and depth B. In practice, bottom-hole temperatures are combined with a measured or estimated thermal conductivity profile to determine the surface heat flow q{sub 0}, which in turn is used for all consequent subsurface temperature computations. The method has been tested in the Tertiary Uinta Basin of northeastern Utah, a region of intermediate geologic complexity (structurally simple yet lithologically complex) where numerous oil and gas well data are available. Thermal conductivity values, determined for 852 samples from five representative wells varying in depth from 670 to 5180 meters, were used to assign average conductivities to geologic formations and to investigate the effect of facies changes on intra-formation conductivities. In situ conductivities were corrected for porosity and temperature effects. Formation thicknesses needed for the thermal resistance summation were obtained by utilizing approximately 2000 wells in the WEXPRO Petroleum Information file, the computations being expedited by describing all formation contacts as fourth order polynomial surfaces. Bottom-hole temperatures were used from 97 selected wells where multiple well logs permitted correcting temperatures for drilling effects.
Date: September 1, 1982
Creator: Chapman, David S. & Keho, Tim
Partner: UNT Libraries Government Documents Department

Utah State Prison Space Heating with Geothermal Heat - Resource Assessment Report Crystal Hot Springs Geothermal Area

Description: Reported herein is a summary of work conducted under the Resource Assessment Program-Task 2, for the Utah State Prison Geothermal Space Heating Project at Crystal Hot Springs, Draper, Utah. Assessment of the geothermal resource in and around the Utah State Prison property began in october of 1979 with an aeromagnetic and gravity survey. These tasks were designed to provide detailed subsurface structural information in the vicinity of the thermal springs so that an informed decision as to the locations of test and production holes could be made. The geophysical reconnaissance program provided the structural details needed to focus the test drilling program on the most promising production targets available to the State Prison. The subsequent drilling and well testing program was conducted to provide information to aid fin the siting and design of a production well and preliminary design activities. As part of the resource assessment portion of the Utah State Prison Geothermal Project, a program for periodic geophysical monitoring of the Crystal Hot Springs resource was developed. The program was designed to enable determination of baseline thermal, hydraulic, and chemical characteristics in the vicinity of Crystal Hot Springs prior to production and to provide a history of these characteristics during resource development.
Date: December 1, 1981
Partner: UNT Libraries Government Documents Department

Geothermal ground noise measurements at Roosevelt Hot Springs and Cove Fort, Utah. Final report

Description: The present study was basically aimed at determining the type of noise found around a geothermal reservoir. Six element arrays were used to determine the structure of the noise field and the types of waves present. Arrays were used at both the Roosevelt Hot Springs and Cove Fort areas. The arrays consisted of six seismometers, one in the center and the others evenly spaced on a circle. The interelement array spacing varied from 50 m to 300 m depending on the experiment. The instrumentation and the arrays are discussed in some detail. The theory required to gain an understanding of the results is briefly discussed. (MHR)
Date: September 1, 1978
Creator: Laster, S.J. & Douze, E.J.
Partner: UNT Libraries Government Documents Department

Initial investigation of soil mercury geochemistry as an aid to drill site selection in geothermal systems

Description: A mercury-in-soil survey was conducted at the Roosevelt Hot Springs Known Geothermal Resource Area (KGRA), Utah, to evaluate mercury soil geochemistry as a method of selecting exploration well sites in a hot-water geothermal system. Samples of -80 mesh soil were collected at 30.5 m intervals along traverses crossing known structures, surficial geothermal alteration, and exploration well sites, and were analyzed using a Gold Film Mercury Detector. Strong mercury anomalies occur at locations along known structures in close proximity to subsurface thermal activity; examples include areas over hot spring deposits and near a shallow producing well. In contrast, background mercury concentrations are present in nearby locations with little or no indication of subsurface thermal activity, such as areas around deep marginal producing wells and dry wells, and areas lacking hot spring deposits. These results indicate that mercury geochemical surveys can be useful for identifying and mapping structures controlling fluid flow in geothermal systems and for delineating areas overlying near-surface thermal activity. Soil mercury geochemistry thus provides information which may aid in the cost-effective selection of exploratory well sites.
Date: December 1, 1978
Creator: Capuano, R. M. & Bamford, R. W.
Partner: UNT Libraries Government Documents Department

Model study of the regional hydrogeologic regime, Roosevelt Hot Springs, Utah

Description: A regional hydrogeologic model is used to investigate the potential for water recharging in the Tushar Mountains to move at depth beneath the Mineral Mountains to discharge in Milford Valley. Simulations carried out over a range of water table positions and assumed depths to a lower impermeable boundary suggest it is unlikely that the topographic configuration alone could drive such a flow system. Specific geologic conditions are necessary if interbasin flow is to occur. However, simulations based on a simplified hydrologic model of the regional geology suggest this is not the case. A regional hydraulic anisotropy greater than 10:1 (Kx/Kz) leads to interflow if the granitic Mineral Mountain pluton and the volcanics in the Tushar Mountains have similar hydraulic conductivities. If either of these units is more nearly isotropic or if the granitic rocks have a greater vertical than horizontal hydraulic conductivity, no interbasin flow is observed. On the basis of available geologic evidence, this latter case seems to be the most likely.
Date: May 1, 1980
Creator: Smith, L.
Partner: UNT Libraries Government Documents Department

Geothermal research, Roosevelt Hot Springs area. Quarterly progress report, November 1, 1976-January 31, 1977

Description: Research results in geophysics, geochemistry, petrology, geologic mapping, drilling, hydrology, and modeling are reviewed briefly. Management details are mentioned. (MHR)
Date: January 1, 1977
Creator: Bowman, J.R.; Brown, F.H.; Cook, K.L.; Nash, W.P.; Parry, W.T.; Sill, W.R. et al.
Partner: UNT Libraries Government Documents Department

Hot dry rock venture risks investigation:

Description: This study assesses a promising resource in central Utah as the potential site of a future commerical hot dry rock (HDR) facility for generating electricity. The results indicate that, if the HDR reservoir productivity equals expectations based on preliminary results from research projects to date, a 50 MWe HDR power facility at Roosevelt Hot Springs could generate power at cost competitive with coal-fired plants. However, it is imperative that the assumed productivity be demonstrated before funds are committed for a commercial facility. 72 refs., 39 figs., 38 tabs.
Date: January 1, 1988
Partner: UNT Libraries Government Documents Department

Hydrothermal alteration at the Roosevelt Hot Springs Thermal Area, Utah: modal mineralogy, and geochemistry of sericite, chlorite, and feldspar from altered rocks, Thermal Power Company well Utah State 14-2

Description: Sericites, chlorites, feldspars, biotite and hornblende from hydrothermally altered rocks at several depths in Thermal Power Company well Utah State 14-2, Roosevelt Hot Springs Thermal Area, Utah, have been analyzed using the electron microprobe. Sericites and ferromagnesian minerals have been analyzed for 12 major elements, and feldspars for 3. The results have been used, along with whole rock chemical analyses, to computer calculate modal mineralogy for samples from the drillhole. Calculated modes for hydrothermal minerals are in reasonable agreement with observations from thin sections.
Date: November 1, 1978
Creator: Ballantyne, J.M.
Partner: UNT Libraries Government Documents Department

Radon emanometry as a geothermal exploration technique; theory and an example from Roosevelt Hot Springs KGRA, Utah

Description: Four radon survey lines were established over the geothermal field of Roosevelt Hot Springs KGRA. The radon flux was determined using the Westinghouse Alpha 2 system which measures the flux at each station over a period of 30 days using an alpha-sensitive dosimeter. The method was very successful in locating mapped fault systems that communicate with the structurally controlled geothermal reservoir. It is concluded that this method, coupled with a structural analysis, can be useful as a site-specific exploration tool, particularly in locating exploration holes in known geothermal areas.
Date: December 1, 1978
Creator: Nielson, D. L.
Partner: UNT Libraries Government Documents Department

Controlled-source audiomagnetotellurics in geothermal exploration. Topical report

Description: Theoretical and field tests indicate that the controlled-source audiomagnetotelluric (CSAMT) method provides an efficient means of delineating the shallow resistivity pattern above a hydrothermal system. Utilizing a transmitter overcomes the main limitation of conventional AMT: variable and unreliable natural source fields. Reliable CSAMT measurements can be made with a simple scalar receiver. Calculations for a half-space show that the plane wave assumption is valid when the transmitter is more than 3 skin depths away in the broadside configuration and more than 5 skin depths away in the collinear configuration. Three dimensional numerical modeling results for a bipole source 5 skin depths away compare well with those for a plane wave source, showing that the method is valid. Comparisons between 2D and 3D model results show that a 2D MT program can be used to interpret CSAMT data. A CMAST survey at the Roosevelt Hot Springs KGRA produced apparent resistivity contour maps at four frequecies: 32, 98, 977, and 5208 Hz. These maps show the same features as a first-separation dipole-dipole resistivity map. Detailed CSAMT data was also collected at 10 frequencies on two profiles. Two-dimensional MT modeling (TM mode) of the resulting pseudosections yields models similar to those derived by modeling the dipole-dipole resistivity data. However, CSAMT resolved details not shown by the resistivity modeling.
Date: September 1, 1980
Creator: Sandberg, S.K. & Hohmann, G.W.
Partner: UNT Libraries Government Documents Department

Inversion modeling of multiple geophysical data sets for geothermal exploration: application to Roosevelt Hot Springs area. Final report

Description: The theoretical basis for modeling the arrival times of local earthquake P waves at a network of seismic stations is described. A technique for separating the dependence of network arrival times on velocity structure from the dependence on the earthquake location parameters is presented. Commented computer listings of the forward modeling algorithms developed in part under DOE support are given. The local arrival time and Bouguer gravity data sets acquired for the Roosevelt and Leach Hot Springs areas are described. The Leach data were found to be inadequate so the emphasis is on the editing and processing the Roosevelt Hot Springs data prior to inversion. The inversion model for the Roosevelt Hot Springs area obtained from a joint inversion of seismic and gravity data is described. The more robust features of the final model are discussed in light of the known geology and geophysics of the area and are compared to results obtained from related studies. (MHR)
Date: April 1, 1982
Creator: Savino, J.M.; Rodi, W.L. & Masso, J.F.
Partner: UNT Libraries Government Documents Department

Seismic baseline and induction studies: Roosevelt Hot Springs, Utah and Raft River, Idaho

Description: Local seismic networks were established at the Roosevelt Hot Springs geothermal area, utah and at Raft River geothermal area, Idaho to monitor the background seismicity prior to initiation of geothermal power production. The Raft River study area is currently seismically quiet down to the level of approximately magnitude one. The Roosevelt Hot Springs area has low-level seismic activity for M/sub L/ greater than about two; however, microearthquake (M/sub L/ less than or equal to 2) swarms appear to be relatively common. One swarm occurred adjacent to the Roosevelt geothermal area during the summer of 1981. From June 27 to August 28, 1044 microearthquakes (M/sub L/ less than or equal to 1.5) were recorded from which 686 earthquakes were located and analysed. The main cluster of microearthquakes was located about 2 km east of the production field at a depth of about 5 km. A few small events were located in the production field at shallow depths (< 2 km). Three of the four largest earthquakes in the swarm (M/sub L/ 1.5-2.0) were located 4 to 5 km further east along a n-NW trend beneath the flank of the adjacent Mineral Mountains. Focal mechanism solutions indicate primarily normal faulting due to the regional E-W extension which characterizes this portion of the eastern Basin and Range province. Hence, the Mineral Mountain swarm appears to be a natural release of tectonic stress in this area. Nevertheless, the occurrence of natural earthquake swarms indicates a potential for induced seismicity at Roosevelt Hot Springs after major production operations are initiated.
Date: May 1, 1982
Creator: Zandt, G.; McPherson, L.; Schaff, S. & Olsen, S.
Partner: UNT Libraries Government Documents Department