Sowiżdżał, AnnaSemyrka, Roman2016-08-302016-08-302016-08Geologos, 2016, 22, 2,pp.149-163ISBN 978-83-232187-4-6ISSN 1426-8981http://hdl.handle.net/10593/14879Petrophysical investigations are fundamental to natural resource exploration. In order to recognise the geothermal potential of sedimentary rocks in central Poland, 259 samples were collected from prospective deep-lying geothermal reservoirs. Parameters measured include bulk density, skeletal density, effective porosity, permeability, average pore diameter and specific surface. Results indicate that at great depths (mostly > 3,000 m below surface) sedimentary rocks show low values of porosity (mainly less than 5%) and permeability (only sporadically in excess of 1 md). These values call for a petrothermal use of reservoirs, for which an Enhanced Geothermal System (EGS) was developed. Reser- voirs suited for the EGS are Carboniferous and Lower Triassic sandstones in the central part of Poland (Mogilno-Łódź Trough region and a small part of the Kujawy Swell and Fore-Sudetic regions). In addition, Carboniferous limestones in this area are potentially prospective.enginfo:eu-repo/semantics/openAccesspetrophysical parametersgeothermal energyEnhanced Geothermal Systemscentral EuropeArtykułhttps://doi.org/10.1515/logos-2016-0015