Fluid Flow Vectors And Water Mass Balance In Kakkonda And Its Surrounding Geothermal Area, Northeast Japan

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Conference Paper: Fluid Flow Vectors And Water Mass Balance In Kakkonda And Its Surrounding Geothermal Area, Northeast Japan

Abstract
Subsurface temperature and fluid flow vectors have been calculated on the basis of borehole temperature logging data. These data are useful for assessment of exploitable resources. Subsurface temperature contour maps are described for Kakkonda and its surrounding areas, based on the calculation of the relaxation method, and indicate where the high temperature zone (HTZ) is located. The total area over 250°C at -2 km as1 reaches 390 km2. The deep drill hole, WD-1, recorded temperatures exceeding 500°C in the Quaternary granite at -3 km as1 at Kakkonda, and proved the vast heat potential for the present geothermal system. Meanwhile the vector map of subsurface fluid flow indicates rapid fluid flow in Tertiary formations, while slow fluid flow in pre-Tertiary formations. Water mass balance is roughly estimated by comparison between infiltrated rain precipitation and production water mass from the Kakkonda power station. The result suggests that fluid supply to the geothermal system from the surrounding catchment area, is not sufficient for further exploitation in Kakkonda. An efficient water recycling system should be designed

Author 
Shiro Tamanyu








Published 
GRC, 2001





DOI 
Not Provided
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Citation

Shiro Tamanyu. 2001. Fluid Flow Vectors And Water Mass Balance In Kakkonda And Its Surrounding Geothermal Area, Northeast Japan. In: (!) ; (!) ; (!) . (!) : GRC; p. (!)