Recent progress of NEDO`s {open_quotes}deep-seated geothermal resources survey{close_quotes} project

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:494416

Uchida, Toshihiro; Akaku, Kohei; Sasaki, Munetake ^[1]

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1. 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--
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
DATA COMPILATION
GEOTHERMAL RESOURCES
GEOTHERMAL WELLS
HYDROTHERMAL SYSTEMS
JAPAN
KAKKONDA GEOTHERMAL FIELD
RESOURCE DEVELOPMENT
TEMPERATURE SURVEYS
WELL DRILLING