In the years 2010-2013, anal y sis of rocks that build the sed i men tary cov ers in Po land was car ried out from the point of view of uti li za tion of en ergy ac cu mu lated in Hot Dry Rock -used in En hanced Geo ther mal Sys tems (EGS). As a re sult of a number of an a lyt i cal stud ies, the area sit u ated in the cen tral part of Po land was se lected as one of pro spec tive ar eas for lo ca tion of EGS in sed i men tary rocks. This area en com passes a ma jor part of the Mogilno-£ódŸ Trough, a part of the Kujawy Swell and a small frag ment of the Fore-Sudetic Monocline. The most fa vour able con di tions for de vel op ment of EGS oc cur in the Lower Tri as sic de pos its in the Krooeniewice-Kutno vi cin ity, where they are bur ied to depths greater than 5000 m b.s.l., their thick nesses ex ceeds 1500 m, po ros ity is about 3% and per me abil ity is about 0.02-0.1 mD. In the study area, ther mal char acter iza tion of the for ma tion was car ried out for lo ca tion of the EGS in sed i men tary rocks. The tem per a ture at the top of the Lower Tri as sic res er voir is mod elled in the range of 165-175°C. Char ac ter iza tion of petrophysical pa ram e ters was the ba sis for fur ther mod el ling of EGS uti li za tion in this area.
The principal source rocks in the Outer Carpathians are organic‐rich shales in the Oligocene to Lower Miocene Menilite Formation. The average total organic carbon (TOC) content in the Menilite Formation is 4–8 wt%; the maximum measured is 26 wt%. Organic matter (OM) is oil‐prone Type II kerogen derived mainly from algae and cyanobacteria which was deposited under euxinic conditions. The thermal maturity of the Menilite shales varies significantly within the Outer Carpathians, both vertically in relation to burial depth and laterally in different tectonic units, and increases from external to internal parts of the orogenic belt. Maturity in general ranges from immature to different phases of the “oil window” and up to the “gas window”.
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