Deep electrical resistivity tomography for the prospection of low- to medium-enthalpy geothermal resources
Geophysical Journal International
| 2019-09 | Journal article | DOI: 10.1093/gji/ggz411
We acquired a 4.5-km-long 2-D geoelectrical survey in an industrial area to investigate the subsurface structure of a sedimentary sequence that was the target of a ∼700 m geothermal exploration well in the Greater Geneva Basin, Western Switzerland. We compared the resistivity model against reflection seismic and gravimetric data and well logs. The processed resistivity model is consistent with the interpretation of the active-seismic data and density variations computed from the inversion of the residual Bouguer anomaly. The combination of the resistivity and gravity models suggest the presence of a low resistivity and low density body crossing Mesozoic geological units up to Palaeogene–Neogene units that can be used for medium-enthalpy geothermal exploitation.
Credits
University of Geneva, Geostudi Astier srl