REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10
The Thelamörk low-temperature geothermal system in N-Iceland has for the last nine years been a source of hot water for the Akureyri District Heating Service. The main production well in the Thelamörk field, LÞN-11, was drilled in 1992 intersecting a productive fracture at 450 m depth yielding 17 l/...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.487.1999 2023-05-15T13:08:33+02:00 REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 Arnar Hjartarson Gudni Axelsson Steinunn Hauksdottir The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.1999 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.1999 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/2002/Hjartars.pdf text ftciteseerx 2016-01-08T08:15:35Z The Thelamörk low-temperature geothermal system in N-Iceland has for the last nine years been a source of hot water for the Akureyri District Heating Service. The main production well in the Thelamörk field, LÞN-11, was drilled in 1992 intersecting a productive fracture at 450 m depth yielding 17 l/s of 91°C water. Geochemical data indicated deep reservoir temperatures around 100°C and drilling experience in the region shows that the best feed-zones are usually at depths between 1000 to 1500 m. Instead of drilling a new well to hit this target an old 900 m deep well, LÞN-10, was deepened and deviated towards the main fracture-zone of the system. The well intersected a good feed-zone at 1700 m depth with a temperature about 103°C. A five-month production test was performed with careful monitoring of production rates, water level changes and water temperature for well LÞN-10 as well as five other wells in the field. Observed water level changes were simulated with lumped parameter models. The simulation results indicate that the Thelamörk reservoir has a volume of about 1 km3 and an average permeability of 1 Dm. Predicted water level changes during long-term production indicate that the geothermal system will sustain a production between 20 and 21 l/s of 103°C water for the next 8 years, with a draw-down less than 245 m. The deepening of well LÞN-10 has resulted in an increase in the energy production potential of the Thelamörk geothermal system from 4.4 MWt to 6.4 MWt. Text Akureyri Akureyri Akureyri Iceland Unknown Akureyri |
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English |
description |
The Thelamörk low-temperature geothermal system in N-Iceland has for the last nine years been a source of hot water for the Akureyri District Heating Service. The main production well in the Thelamörk field, LÞN-11, was drilled in 1992 intersecting a productive fracture at 450 m depth yielding 17 l/s of 91°C water. Geochemical data indicated deep reservoir temperatures around 100°C and drilling experience in the region shows that the best feed-zones are usually at depths between 1000 to 1500 m. Instead of drilling a new well to hit this target an old 900 m deep well, LÞN-10, was deepened and deviated towards the main fracture-zone of the system. The well intersected a good feed-zone at 1700 m depth with a temperature about 103°C. A five-month production test was performed with careful monitoring of production rates, water level changes and water temperature for well LÞN-10 as well as five other wells in the field. Observed water level changes were simulated with lumped parameter models. The simulation results indicate that the Thelamörk reservoir has a volume of about 1 km3 and an average permeability of 1 Dm. Predicted water level changes during long-term production indicate that the geothermal system will sustain a production between 20 and 21 l/s of 103°C water for the next 8 years, with a draw-down less than 245 m. The deepening of well LÞN-10 has resulted in an increase in the energy production potential of the Thelamörk geothermal system from 4.4 MWt to 6.4 MWt. |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
author |
Arnar Hjartarson Gudni Axelsson Steinunn Hauksdottir |
spellingShingle |
Arnar Hjartarson Gudni Axelsson Steinunn Hauksdottir REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
author_facet |
Arnar Hjartarson Gudni Axelsson Steinunn Hauksdottir |
author_sort |
Arnar Hjartarson |
title |
REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
title_short |
REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
title_full |
REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
title_fullStr |
REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
title_full_unstemmed |
REASSESSMENT OF THE THELAMÖRK LOW TEMPERATURE GEOTHERMAL SYSTEM IN N-ICELAND FOLLOWING SUCCESSFUL DEEPENING OF WELL LÞN-10 |
title_sort |
reassessment of the thelamörk low temperature geothermal system in n-iceland following successful deepening of well lþn-10 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.1999 |
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Akureyri |
geographic_facet |
Akureyri |
genre |
Akureyri Akureyri Akureyri Iceland |
genre_facet |
Akureyri Akureyri Akureyri Iceland |
op_source |
https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/2002/Hjartars.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.487.1999 |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766097787251851264 |