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Title: Low-Temperature Hydrothermal Resource Potential

Abstract

Compilation of data (spreadsheet and shapefiles) for several low-temperature resource types, including isolated springs and wells, delineated area convection systems, sedimentary basins and coastal plains sedimentary systems. For each system, we include estimates of the accessible resource base, mean extractable resource and beneficial heat. Data compiled from USGS and other sources. The paper (submitted to GRC 2016) describing the methodology and analysis is also included.

Authors:
Publication Date:
Research Org.:
DOE Geothermal Data Repository; National Renewable Energy Laboratory
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
OSTI Identifier:
1261906
Report Number(s):
830
DOE Contract Number:
FY16 AOP 4.6.8.3
Resource Type:
Data
Data Type:
Specialized Mix
Country of Publication:
United States
Availability:
GDRHelp@EE.Doe.Gov
Language:
English
Subject:
15 Geothermal Energy; geothermal; low-temperature; direct use; hydrothermal; springs; wells; delineated area; sedimentary basin; coastal plains; accessible resource base; mean extractable resource; beneficial heat; USGS; resource potential; depth; temperature; volume; resource estimate; potential; accessible resource

Citation Formats

Katherine Young. Low-Temperature Hydrothermal Resource Potential. United States: N. p., 2016. Web. doi:10.15121/1261906.
Katherine Young. Low-Temperature Hydrothermal Resource Potential. United States. doi:10.15121/1261906.
Katherine Young. 2016. "Low-Temperature Hydrothermal Resource Potential". United States. doi:10.15121/1261906. https://www.osti.gov/servlets/purl/1261906.
@article{osti_1261906,
title = {Low-Temperature Hydrothermal Resource Potential},
author = {Katherine Young},
abstractNote = {Compilation of data (spreadsheet and shapefiles) for several low-temperature resource types, including isolated springs and wells, delineated area convection systems, sedimentary basins and coastal plains sedimentary systems. For each system, we include estimates of the accessible resource base, mean extractable resource and beneficial heat. Data compiled from USGS and other sources. The paper (submitted to GRC 2016) describing the methodology and analysis is also included.},
doi = {10.15121/1261906},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 6
}

Dataset:

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  • Compilation of data (spreadsheet and shapefiles) for several low-temperature resource types, including isolated springs and wells, delineated area convection systems, sedimentary basins and coastal plains sedimentary systems. For each system, we include estimates of the accessible resource base, mean extractable resource and beneficial heat. Data compiled from USGS and other sources. The paper (submitted to GRC 2016) describing the methodology and analysis is also included.
  • Shapefile of shallow, low-temperature EGS resources for the United States, and accompanying paper (submitted to GRC 2016) describing the methodology and analysis. These data are part of a very rough estimate created for use in the U.S. Department of Energy Geothermal Technology Office's Vision Study. They are not a robust estimate of low-temperature EGS resources in the U.S, and should be used accordingly.
  • The Eastern Snake River Plain (ESRP) in southern Idaho is a region of high heat flow. Sustained volcanic activities in the wake of the passage of the Yellowstone Hotspot have turned this region into an area with great potential for geothermal resources as evidenced by numerous hot springs scattered along the margins of the plain and several hot-water producing wells and hot springs within the plain. Despite these thermal expressions, it is hypothesized that the pervasive presence of an overlying groundwater aquifer in the region effectively masks thermal signatures of deep-seated geothermal resources. The dilution of deeper thermal water andmore » re-equilibration at lower temperature are significant challenges for the evaluation of potential resource areas in the ESRP. Over the past several years, we collected approximately 100 water samples from springs/wells for chemical analysis as well as assembled existing water chemistry data from literature. We applied several geothermometric and geochemical modeling tools to these chemical compositions of ESRP water samples. Geothermometric calculations based on principles of multicomponent equilibrium geothermometry with inverse geochemical modeling capability (e.g., Reservoir Temperature Estimator, RTEst) have been useful for the evaluation of reservoir temperatures. RTEst geothermometric calculations of ESRP thermal water samples indicated numerous potential geothermal areas with elevated reservoir temperatures. Specifically, areas around southern/southwestern side of the Bennett Hills and within the Camas Prairies in the western-northwestern regions of the ESRP and its margins suggest temperatures in the range of 140-200°C. In the northeastern portions of the ESRP, Lidy Hot Springs, Ashton, Newdale, and areas east of Idaho Falls have expected reservoir temperature =140 °C. In the southern ERSP, areas near Buhl and Twin Falls are found to have elevated temperatures as high as 160 °C. These areas are likely to host potentially economic geothermal resources; however, further detailed study is warranted to each site to evaluate hydrothermal suitability for economic use.« less
  • A hydrogeologic development strategy is presented for the development of low-temperature hydrothermal energy based on an in depth study of low-temperature case histories and other select geothermal developments. The strategy is in the form of decision trees for site selection and exploration, drilling, and testing of fault-controlled systems. The strategy also addressed problems specific to low-temperature hydrothermal development and present differences in equipment and techniques used in other industries. The site selection and exploration strategies are based on balanced mixture of geologic, geochemical, geophysical, hydrological, and drilling practices and techniques. Exploration of a specific site is based on the understandingmore » of geologic structures. The approach proposed in this study involves the formulation of target models and the constant updating of these models during exploration. The drilling strategy is based on athe use of drilling techniques currently acceptable in other industries. The scheme involves the formulation of preliminary drilling plans and the continual updating of these plans as the drilling proceeds. Methods of well construction, the importance of well development, and types of drill fluids are examined in this report. The testing and analysis strategy is based on the use of techniques currently acceptable in other industries. The scheme involves the formulation of preliminary drilling plans and the continual updating of these plans as the drilling proceeds. Methods of well construction, the importance of well development, and types of drill fluids are examined in this report. The testing and analysis strategy is based on the use of techniques currently acceptable in other industries.« less
  • The objectives of testing low-temperature hydrothermal wells are to characterize well response to production (injection), determine resource characteristics and project reservoir longevity. Testing procedures and analysis techniques differ in some respects from proven procedures in the oil and gas and ground water fields. Some basic definitions and standard techniques necessary for the evaluation of a fluid resource in an intergranular permeable reservoir are presented. Problems particular to a non-ideal thermal resource are outlined and some analytical techniques are discussed.