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The geothermal exploration well SH2 is located in Monti Sabatini research lease, 2,5 km north of Vicarello (north shore of the Lago di Bracciano). The objectives of the well were to define the stratigraphic sequence and temperature trends at depth, to ascertain whether any fluids exist within permeable horizons in this geothermal area, and if so determine their physico-chemical characteristics. The drilling reached a total depth of 2499 m, where an extrapolated bottom hole temperature of 290 degrees C was determined. The well appeared to be unproductive. Well SH2 provided contradictory evidence with regard to the existence of a geothermal field in the areas north of Bracciano Lake. For example, it confirmed the presence of an impermeable, flysch-type cover below the volcanites, the possible existence of a carbonate substratum at relatively shallow depth and, in particular, the existence of high temperatures and heat flow. On the other hand, it revealed a total lack of permeability, resulting from the thermal and metasomatic metamorphism affecting the terrains crossed by the well, and from the intense mineralization sealing the fractures. The intense nature of these phenomena suggests that they are probably not confined to the immediate vicinity of this well only, but spread over a much wider area.

Additional information

Bibliographic Reference: EUR 9324 EN (1984) MF, 48 P., BFR 120, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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