Low-temperature geothermal resource and stratigraphy of portions of Yakima County, Washington

Technical Report · Fri Jul 30 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/5659019· OSTI ID:5659019

Biggane, J

The low-temperature geothermal resource of portions of Yakima County, south-central Washington, is defined by several least squares linear regression analyses of bottom-hole temperature and depth data. Intra-borehole flow prevents the use of borehole temperature gradients for geothermal resource assessment. Bottom-hole temperature and depth data were separated into fourteen well data groups based on geographic proximity, land slope azimuth, and position within the regional ground-water flow system. The regression analyses of these well data groups indicate that the projected land-surface temperature and geothermal gradient range from 10.6 to 14.0/sup 0/C and from 24.9 to 52.2/sup 0/C/km, respectively. The depth to the 20/sup 0/C isotherm ranges from 142 to 346m. The average projected land-surface temperature and geothermal gradient are approximately 11.3/sup 0/C and 43.0/sup 0/C/km, respectively. The average depth to the 20/sup 0/C isoterm is approximately 202m. The projected land-surface temperature appears to decrease and the depth to the 20/sup 0/C isotherm appears to increase as the land-surface elevation of the well dat group increases. Stratigraphic correlation diagrams developed from borehole geophysical and lithologic logs are given for localities within the lower Yakima, Black Rock, Moxee, Ahtanum, Cowiche, and Naches valleys. These correlation diagrams are combined with their respective borehole temperatue logs and well data group predicted temperature curves to assess the validity of the regression analyses and to determine aquifer locations, temperatures, and directions of intra-borehole flow.

• Research Organization: Washington State Univ., Pullman (USA). Geological Engineering Section
• DOE Contract Number: AC07-79ET27014
• OSTI ID: 5659019
• Report Number(s): DOE/ET/27014-T5; ON: DE84004870
• Resource Relation: Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
WASHINGTON
GEOTHERMAL RESOURCES
AQUIFERS
BOREHOLES
FLOW MODELS
GEOLOGIC STRUCTURES
GEOLOGY
GEOTHERMAL GRADIENTS
GROUND WATER
LITHOLOGY
REGRESSION ANALYSIS
STRATIGRAPHY
WELL LOGGING
WELL TEMPERATURE
CAVITIES
FEDERAL REGION X
HYDROGEN COMPOUNDS
MATHEMATICAL MODELS
MATHEMATICS
NORTH AMERICA
OXYGEN COMPOUNDS
RESERVOIR TEMPERATURE
RESOURCES
STATISTICS
TEMPERATURE GRADIENTS
USA
WATER
Geothermal Legacy
150201* - Geology & Hydrology of Geothermal Systems- USA- (-1989)
150301 - Geothermal Exploration & Exploration Technology- Geophysical Techniques & Surveys