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Shallow Geothermal Energy System in Fractured Basalt; A Case Study From Kollafjørður, Faroe Islands, NE-Atlantic OceanGold Open Access

Author: O. Eidesgaard
Event name: EAGE/BVG/FKPE Joint Workshop on Borehole Geophysics and Geothermal Energy
Session: Session 1
Publication date: 22 November 2019
DOI: 10.3997/2214-4609.201903163
Organisations: EAGE
Language: English
Info: Abstract, PDF ( 224.46Kb )

A shallow (≈200 m) geothermal energy system is examined in the Faroe Islands, a 60-million-year-old volcanic archipelago in the Northeast Atlantic. The geothermal water has a heating capacity of approximately 150 individual households and consists of meteoric water approximately 3 years old. Water temperatures as high as 27°C in artesian wells are explained by a topography-driven vertical convection. The water flows into the boreholes from the north-northwest through fractures and flow tops and bases in the basalt exposed in surrounding high terrains. Of six influx zones, three are water carrying fractures that strike N – S and dip E.

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