Ogachi Project with Multi-Layer Fracturing Method for HDR Geothermal Power-Outline and Future Plan
- Key words
- HDR, multiple reservoirs, fracturing, flow testing, Ogachi
- Location
- Ogachi, Japan
- Conference
- World Geothermal Congress
- Year
- 1995
- Session
- SECTION 12 - Advanced Technologies (HDR - Magma - Geopressur
- Language
- English
- Paper number
- 4-Hori
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Abstract
A 22 day water circulation test from a 1,000m deep injection well to a production well through two hydraulically fractured zones at about 720 m and 1000 m, was performed in the fall of 1993 at the Ogachi Hot Dry Rock (HDR) site, northern Japan. During the test, the injection flow rate increased from 400 to 1, 200 liter/min at almost constant pressure of 20 Mla. Unfortunately the recovered water from the production well was as small as 4% of the injected water. According to AE (microearthquake) observation results. The production well is not connected to an estimated main flow path. We still conduct a fracturing test in the production well to get good water connection to the main flow path.
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