Low-temperature Geothermal Resources of Washington PDF Download

Author: J. Eric Schuster
Publisher:
ISBN:
Category : Geothermal resources
Languages : en
Pages : 53

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Category :
Languages : en
Pages :

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Author: Michael A. Korosec
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ISBN:
Category : Geothermal resources
Languages : en
Pages : 20

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Author: Washington (State). Division of Geology & Earth Resources
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ISBN:
Category : Geothermal resources
Languages : en
Pages : 37

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Author: John Biggane
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Category : Geology
Languages : en
Pages : 128

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Author: Scott Edward Widness
Publisher:
ISBN:
Category : Geothermal resources
Languages : en
Pages : 714

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Author: Scott Widness
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Category : Connell (Wash.)
Languages : en
Pages : 27

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Category :
Languages : en
Pages :

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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°C and from 24.9 to 52.2°C/km, respectively. The depth to the 20°C isotherm ranges from 142 to 346m. The average projected land-surface temperature and geothermal gradient are approximately 11.3°C and 43.0°C/km, respectively. The average depth to the 20°C isoterm is approximately 202m. The projected land-surface temperature appears to decrease and the depth to the 20°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.

Author:
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Category :
Languages : en
Pages :

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The study area is located in portions of Adams, Grant, Lincoln, and Franklin counties of eastern Washington. The area is representative of a complex stratigraphic and geohydrologic system within the basalt flows of the Columbia River Basalt Group. Fluid temperature data were collected by three different agencies. The Geological Engineering Section (WSU) at Washington State University, runs a continuous fluid temperature (FT) log as part of a complete suite of geophysical logs. The US Geological Survey (USGS) runs a continuous fluid FT log in conjunction with caliper and natural-gamma logs. Southern Methodist University (SMU) and the Washington State Department of Natural Resources, Division of Geology and Earth Resources (DNR), have cooperated in gathering FT data. The DNR-SMU data were collected by taking temperature measurements at 5 m intervals. Bottom-hole temperatures (BHT) and bottom-hole depths (BHD) of selected wells in the study area are given. A technique developed by Biggane (1982) was used to determine the geothermal gradients within the area. A least squares linear regression analysis of the relationship between the BHT and BHD was used to determine the geothermal gradient of a given well data group (WDG).

Author: Kim Lyons
Publisher:
ISBN:
Category : Environmental permits
Languages : en
Pages : 18

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