| Title | Successful Exploration of a Fracture Dominated Geothermal System at Thelamˆrk, North-Iceland |
|---|---|
| Authors | Olafur G. FlÛvenz, GrÌmur Bjˆrnsson, Gudni Axelsson, Jens TÛmasson, Gudr?n SverrisdÛttir, Hilmar Sigvaldason and Biljana M |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | geophysics, exploration, drilling, injection test, direct use, economics |
| Abstract | The town of Akureyri in N-Iceland has been heated by geothermal energy since 1979 which is exploited at four geothermalfields, located 2-13 km south and west from Akureyri. Due an increasing energy demand, detailed exploration was carried during 1983-1993 at the geothermal field, located 13 km north of Akureyri. The exploration involved a ground survey to map near vertical dykes, head on resistivity prof ling to map conducting vertical fractures, drilling of shallow exploration wells, and modelling of the temperature distribution. The exploration was concluded by successful well which intersected a fracture producing 90?C hot water. A full scale production test was carried over aperiod of months including a 3 month reinjection test. The results showed that it was economically feasible to use the Thelamdrk field for space heating in Akureyri. |