Discovery and Development of the Low-Temperature Geothermal Field at Hjalteyri, Eyjafjˆrdur, in Northern Iceland. A Highly Productive System Apparently Lacking Surface Expression
- Key words
- geothermal prospecting, low T system, heat flow, Iceland
- Location
- Hjalteyri, Iceland
- Conference
- World Geothermal Congress
- Year
- 2005
- Session
- 9. Case Histories
- Language
- English
- Paper number
- 0927
Full text
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Abstract
Geothermal prospecting in the vicinity of Hjalteyri was initiated in 1999. During the following 3 years, it involved among other, the drilling of 16 shallow wells for temperature logging. A ground magnetic survey was carried out near the centre of the thermal anomaly, established by logging the shallow wells. The composition of thermal water from wells with artesian flow indicated system temperatures in excess of 70?C. Selected wells were subjected to wire-line logging, including logging by tele-viewer.
The results suggested a significant geothermal resource and drilling of well HJ-19 to 1450 m, yielded by far the most productive well in the Eyjafjˆrdur region. The Hjalteyri low temperature area is in fact among the most productive in Iceland, capable of yielding around 200 L/s of 90?C hot water at moderate drawdown rates over extended periods of time.
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