Recent progress of NEDO`s {open_quotes}deep-seated geothermal resources survey{close_quotes} project
- New Energy and Industrial Technology Development Organization (NEDO), Tokyo (Japan); and others
A deep geothermal resources survey using a borehole named WD-1 has been conducted in the Kakkonda geothermal field, Japan by NEDO since 1992 with the aim of establishing a desirable direction for the development of deep geothermal resources. In July 1995, WD-1 reached a depth of 3,729 m (T.D.), enabling the collection of highly valuable information as follows. The Kakkonda Quaternary granite underlying reservoirs maintain temperatures above 500 {degrees}C and are considered to be a possible heat source of the Kakkonda geothermal system. The recovered temperature profile drastically changes from hydrothermally convective to conductive at a depth interval between 3,100 m and 3,200 m, which indicates the existence of the bottom of hydrothermal convection. Highly saline hydrothermal fluids were collected near the bottom of the well after a temperature recovery measurement. Achievement and analysis of this valuable data will be useful in delineating the characteristics of deep geothermal reservoirs with regard to deep and hot intrusions.
- OSTI ID:
- 494416
- Report Number(s):
- CONF-960913-; TRN: 97:002642-0093
- Resource Relation:
- Conference: Annual meeting of the Geothermal Resources Council, Portland, OR (United States), 29 Sep - 2 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Geothermal development in the Pacific rim. Transactions, Volume 20; PB: 886 p.
- Country of Publication:
- United States
- Language:
- English
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