Abstract
Sasso 22 well was programmed in the Larderello field (Italy)with the objective of verifying whether geothermal fluids could be recovered from the deep horizons underlying those producing at present; other objectives were to obtain better estimates of deep energy reserves and gather information on their exploitation potential. Furthermore, data from this deep well should improve the phenomenological model of the field. Further information has been obtained on the stratigraphy of the deep layers of the crystalline basement; below 2500 m the well penetrated gneiss and amphibolite, with a gradually increasing metamorphism. In-hole logs revealed the presence of many fractured horizons within the basement down to well-bottom and increasing temperature values to around 380°C at 3970 m. Study of the parageneses indicates the existence of an initial hydrothermal phase at temperatures well above those measured at present and also of fluid circulations in unexploited sections of the basement as deep as 3–4 km.
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References
G. Bagnoli, G. Gianelli, M. Puxeddu, A. Rau, P. Squarci and M. Tongiorgi (1979) A tentative stratigraphic reconstruction of the Tuscan Paleozoic basement. Mem.Soc.geol. it., in press.
P. Di Simplicio, G. Ferrara, C. Ghezzo, G. Guasparri, R. Pellizer, C.A. Ricci, F. Rita and G. Sabatini (1975) I1 metamorfismo ed il magmatismo paleozoico nella Sardegna. Rend.Soc.it.Min.Petr. 30, 979–1068.
L. Amodio-Morelli, G. Bonardi, V. Colonna, D. Dietrich, G. Giunta, F. Ippolito, V. Liguori, F. Lorenzoni, A. Paglionico, V. Perrone, G. Piccarreta, M. Russo, P. Scandone, E. Zanettin-Lorenzoni, A. Zuppetta (1976) L’arco calabro-peloritano nell’orogene appenninico-maghrebide. Mem.Soc.geol.it. 17, 1–60.
M. Frey, J.C. Hunziker, W. Frank, J. Bocquet, G.V. Dal Piaz, E. Jäger and E. Niggli (1974) Alpine metamorphism of the Alps: a review. Schweizerische Mineralogische und Petrographische Mitteilungen 54, 247–290.
M. Seyler and M. Boucarut (1978) Données nouvelles sur la lithostratigraphie du massif des Maures le long d’une transversale Réal Martin-Grimaud. Bull.BRGM 2 ème série, section 1,no.1,3–18.
G. Gianelli, M. Puxeddu and P. Squarci (1978) Structural setting of the Larderello-Travale geothermal region. Proc.69th Congress Italian Geological Society, Perugia, in press.
G. Gianelli, M. Puxeddu and P. Squarci (1979) Studio dellfassetto strut-turale della regione geotermica di Larderello-Travale. Proc. lst Informative Seminar of the Geothermal Energy Sub-Project, Finalized Energy Program, 224–235.
H.G.F. Winkler (1976) Petrogenesis of Metamorphic Rocks.4th Ed.,Springer-Verlag, Berlin, pp.334.
H.J. Greenwood (1976) Metamorphism at moderate temperatures and pressures. In: (D.K. Bailey and R. McDonald,eds.)The Evolution of the Crystalline Rocks. Academic Press, London, 187–259.
M. Puxeddu, P. Squarci, A. Rau, M. Tongiorgi and P.D. Burgassi (1977) Stratigraphic and tectonic study of Larderello-Travale basement rocks and its geothermal implications. Geothermics 6, 1/2, 87–93.
F. Batini, P.D. Burgassi, G.M. Cameli, R. Nicolich and P. Squarci (1978) Contribution to the study of the deep lithospheric profiles: ‘deep’ reflecting horizons in Larderello-Travale geothermal field. Proc. 69th Congress Italian Geological Society, Perugia, in press.
G. Cavarretta, G. Gianelli and M. Puxeddu (1980) Hydrothermal metamorphism in the Larderello-Travale geothermal field. Geothermics 9-3/4, in press.
F. D’Amore, G. Gianelli and M. Puxeddu (1980) An attempt at reconstructing a hydrothermal alteration process of the basement rocks of the Larderello geothermal system. Geothermics, in press.
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Bertini, G., Giovannoni, A., Stefani, G.C., Gianelli, G., Puxeddu, M., Squarci, P. (1980). Deep Exploration in Larderello Field: Sasso 22 Drilling Venture. In: Strub, A.S., Ungemach, P. (eds) Advances in European Geothermal Research. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9059-3_26
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DOI: https://doi.org/10.1007/978-94-009-9059-3_26
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