GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 3.1 GNGTS 2024 Sustainable geothermal energy for two Southern Italy regions: geophysical resource evaluaton and public awareness O. Amoroso 1 , V. Giampaolo 2 , M. Balasco 2 , M. Blasone 1 , D. Bubbico 3 , P. Capuano 1 , G. De Martno 2 , M.V. Gargiulo 1 , F. Napolitano 1 , A. Perrone 2 , S. Panebianco 2 , R. Russo 1 , V. Serlenga 2 , T.A. Stabile 2 1 Università degli Studi di Salerno, Dipartmento di Fisica “E.R. Caianiello” 2 Consiglio Nazionale delle Ricerche, Isttuto di metodologie per l'analisi ambientale (IMAA) 3 Università degli Studi di Salerno, Dipartmento di Studi Politci e Sociali/DISPS The deployment and sustainable use of Italy's geothermal resources could represent a key asset to increase renewable energy producton and reduce greenhouse gas emissions in the coming years. The primary benefts of geothermal energy generaton and geothermal heatng and cooling are that the sources are local, adaptable, and resistant to the price volatlity that impacts fossil fuels. Furthermore, they are renewable energy sources that allow for energy mix diversifcaton, resultng in less energy dependency and higher supply security. As a result, geothermal energy is a realistc choice and an urgent cure for reducing Italy's reliance on the import of fossil energy resources and improving energy efciency in building air conditoning and the executon of numerous industrial operatons. Finally, recent studies have shown that high- to low-enthalpy fuids could represent an unconventonal source of lithium, a critcal material for the energy transiton (Dini et al., 2022). In this setng, there is an obvious need for programs to improve subsurface geothermal resource extracton while maintaining environmental sustainability. These designs need knowledge of the subsurface, which, owing to its complexity, renders traditonal diagnostcs inefectve. Assessing the potental exploitaton requires knowing the type of geothermal system, the likely temperature and characteristcs of the reservoir rocks and fuids. The volumetric or stored heat method (White and Williams, 1975) and its revised versions are the most widely used tools for quantfying geothermal resource capacity. However, these methods sufer from several major uncertaintes depending on reservoir temperature, porosity, saturaton, and resource size (volume) (Ciriaco et al., 2020). To reduce these uncertaintes, it is possible to estmate these parameters by adoptng geophysical methods. Electrical and electromagnetc ones, such as Magnetotelluric (MT) and deep electrical resistvity tomography (DERT), have been proven to be powerful tools for investgatng and characterising geothermal reservoirs on a wide range of depths and at diferent scales, since measured electrical resistvity depend on temperature, porosity, percentage of fuid saturaton, and permeatng fuid type (Manzella et al., 1999; Tamburiello et al., 2008; Rizzo et al., 2022). Local