Imaging high-temperature geothermal reservoirs with ambient seismic noise 
tomography, a case study of the Hengill geothermal field, SW Iceland

Sánchez-Pastor, P.; Obermann, A.; Reinsch, Thomas; Ágústsdóttir, T.; Gunnarsson, G.; Tómasdóttir, S.; Hjörleifsdóttir, V.; Hersir, G.P.; Ágústsson, K.; Wiemer, S.

doi:10.1016/j.geothermics.2021.102207

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Imaging high-temperature geothermal reservoirs with ambient seismic noise tomography, a case study of the Hengill geothermal field, SW Iceland

Authors

Sánchez-Pastor, P.
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Obermann, A.
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Reinsch, Thomas
2.2 Geophysical Imaging of the Subsurface, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Ágústsdóttir, T.
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Gunnarsson, G.
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Tómasdóttir, S.
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Hjörleifsdóttir, V.
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Hersir, G.P.
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Ágústsson, K.
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Wiemer, S.
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Citation

Sánchez-Pastor, P., Obermann, A., Reinsch, T., Ágústsdóttir, T., Gunnarsson, G., Tómasdóttir, S., Hjörleifsdóttir, V., Hersir, G., Ágústsson, K., Wiemer, S. (2021): Imaging high-temperature geothermal reservoirs with ambient seismic noise tomography, a case study of the Hengill geothermal field, SW Iceland. - Geothermics, 96, 102207.
https://doi.org/10.1016/j.geothermics.2021.102207

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5007381

Abstract

The Hengill volcanic system is located in the Reykjanes Peninsula (Iceland) and hosts two large geothermal power plants: Nesjavellir and Hellisheiði. This area is the next target for the Iceland Deep Drilling Project (IDDP) to search for super-critical fluids. Here, we investigate the potential for ambient seismic noise tomography to be used as a geothermal exploration tool. The results are compared with different geophysical observables, of which resistivity modeling shows an excellent correlation with our results. We also observe a prominent seismic velocity reduction to the south of Hverahlíð, where the most powerful boreholes in the region are located.