{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T08:59:00Z","timestamp":1776329940794,"version":"3.50.1"},"reference-count":53,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T00:00:00Z","timestamp":1757548800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Norway Grants 2014\u20132021 via the National Centre for Research and Development","award":["NOR\/POLNOR\/EnerGizerS\/0036\/2019"],"award-info":[{"award-number":["NOR\/POLNOR\/EnerGizerS\/0036\/2019"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Energies"],"abstract":"<jats:p>This article presents the results of numerical modeling for a hypothetical CO2-EGS system in the volcanic rocks of the Gorz\u00f3w Block, Poland. Modeling was carried out in the following stages: in phase 0, modeling of the fracturing process was performed, as a result of which the permeability distribution for the newly created fractured zone was obtained. Next, the process of saturating the EGS reservoir with CO2 was modeled until pure CO2 could enter the production well (phase 1). Then, a multi-variant simulation of heat production was performed (phase 2). The obtained results allowed for drawing interesting conclusions: (1) the duration of phase 1 may take several years unless a sufficiently high injection rate of CO2 is supplied, (2) the higher the injection rate of CO2, the lower the cumulative storage ratio of CO2, and (3) most of the CO2 storage in the formation takes place in phase 1, while even 92% of the CO2 injected in phase 2 can be recovered via the production well. Despite the environmental benefits connected with structural trapping of CO2, the Gorz\u00f3w Block has probably too low formation temperature (145 \u00b0C) and too low stimulated volume (~0.1 km3) to deliver satisfactory and stable thermal output.<\/jats:p>","DOI":"10.3390\/en18184825","type":"journal-article","created":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T10:50:04Z","timestamp":1757587804000},"page":"4825","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Numerical Modeling of Potential CO2-Fed Enhanced Geothermal System (CO2-EGS) in the Gorz\u00f3w Block, Poland"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6655-9814","authenticated-orcid":false,"given":"Maciej","family":"Miecznik","sequence":"first","affiliation":[{"name":"Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A, 31-261 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Magdalena","family":"Tyszer","sequence":"additional","affiliation":[{"name":"Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A, 31-261 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1384-3763","authenticated-orcid":false,"given":"Anna","family":"Sowi\u017cd\u017ca\u0142","sequence":"additional","affiliation":[{"name":"Faculty of Geology, Geophysics and Environmental Protection, AGH University, Mickiewicza 30 Avenue, 30-059 Krakow, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-4976-7922","authenticated-orcid":false,"given":"Karol","family":"Pierzcha\u0142a","sequence":"additional","affiliation":[{"name":"Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Wybickiego 7A, 31-261 Krak\u00f3w, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6341-9218","authenticated-orcid":false,"given":"Leszek","family":"Paj\u0105k","sequence":"additional","affiliation":[{"name":"Faculty of Geology, Geophysics and Environmental Protection, AGH University, Mickiewicza 30 Avenue, 30-059 Krakow, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0219-6580","authenticated-orcid":false,"given":"Pawe\u0142","family":"G\u0142adysz","sequence":"additional","affiliation":[{"name":"Faculty of Energy and Fuels, AGH University, Mickiewicza 30 Avenue, 30-059 Krakow, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Wetzel, M., Otto, C., Chen, M., Masum, S., Thomas, H., Urych, T., Bezak, B., and Kempka, T. (2023). Hydromechanical Impacts of CO2 Storage in Coal Seams of the Upper Silesian Coal Basin (Poland). Energies, 16.","DOI":"10.3390\/en16073279"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"G\u0142adysz, P., Paj\u0105k, L., Andresen, T., Strojny, M., and Sowi\u017cd\u017ca\u0142, A. (2024). Process Modeling and Optimization of Supercritical Carbon Dioxide-Enhanced Geothermal Systems in Poland. Energies, 17.","DOI":"10.3390\/en17153769"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"140968","DOI":"10.1016\/j.cej.2022.140968","article-title":"Geomechanical challenges during geological CO2 storage: A review","volume":"456","author":"Song","year":"2023","journal-title":"Chem. Eng. J."},{"key":"ref_4","unstructured":"Brown, D. (2000, January 24\u201326). A hot dry rock geothermal energy concept utilizing supercritical CO2 instead of water. Proceedings of the Twenty-Fifth Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA, USA."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1446","DOI":"10.1016\/j.enconman.2007.12.029","article-title":"On production behavior of enhanced geothermal systems with CO2 as working fluid","volume":"49","author":"Pruess","year":"2008","journal-title":"Energy Convers. Manag."},{"key":"ref_6","first-page":"100547","article-title":"The use of super-critical carbon dioxide as the working fluid in enhances geothermal systems (EGSs): A review study","volume":"36","author":"Ranjith","year":"2019","journal-title":"Sustain. Energy Technol. Assess."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1186\/s40517-020-00173-w","article-title":"The potential of coupled carbon storage and geothermal extraction in a CO2-enhanced geothermal system: A review","volume":"8","author":"Wu","year":"2020","journal-title":"Geotherm. Energy"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"236","DOI":"10.1016\/j.applthermaleng.2013.08.007","article-title":"System thermodynamic performance comparison of CO2-EGS and water-EGS systems","volume":"61","author":"Zhang","year":"2013","journal-title":"Appl. Therm. Eng."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Zhao, W., Yuan, Y., Jing, T., Zhong, C., Wei, S., Yin, Y., Zhao, D., Yuan, H., Zheng, J., and Wang, S. (2023). Heat Production Performance from an Enhanced Geothermal System (EGS) Using CO2 as the Working Fluid. Energies, 16.","DOI":"10.3390\/en16207202"},{"key":"ref_10","unstructured":"Potter, R., Robinson, E., and Smith, M. (1974). Method of Extracting Heat from Dry Geothermal Reservoirs. (No. 3,786,858), US Patent."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1186\/2195-9706-1-4","article-title":"A systematic review of enhanced (or engineered) geothermal systems: Past, present and future","volume":"1","author":"Breede","year":"2013","journal-title":"Geotherm. Energy"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1186\/s40517-023-00248-4","article-title":"Optimized geothermal energy extraction from hot dry rocks using a horizontal well with different exploitation schemes","volume":"11","author":"Huang","year":"2024","journal-title":"Geotherm. Energy"},{"key":"ref_13","unstructured":"Duchane, D. (1998, January 28\u201330). The history of HDR research and development. Proceedings of the Draft Proceedings of the 4th International HDR Forum, Strasbourg, France."},{"key":"ref_14","first-page":"706","article-title":"New directions of research in the Polish part of the Sudetic area in the aspect of HDR and EGS technologies","volume":"61","author":"Bujakowski","year":"2013","journal-title":"Przegl. Geol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1186\/s40517-017-0066-z","article-title":"Assessment of the resource base for engineered geothermal systems in Great Britain","volume":"5","author":"Busby","year":"2017","journal-title":"Geotherm. Energy"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"637","DOI":"10.1016\/S0375-6505(99)00034-6","article-title":"Present status of the Ogachi HDR project, Japan, and future plans","volume":"28","author":"Hori","year":"1999","journal-title":"Geothermics"},{"key":"ref_17","unstructured":"Kitano, K., Hori, Y., and Kaieda, H. (June, January 28). Outrline of the Ogachi HDR Project and character of the reservoirs. Proceedings of the World Geothermal Congress 2000, Tohoku, Japan."},{"key":"ref_18","first-page":"220","article-title":"CO2 sequestration into hydrothermal system at Ogachi HDR site","volume":"38","author":"Ueda","year":"2009","journal-title":"Jpn. Mag. Mineral. Petrol. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Sowi\u017cd\u017ca\u0142, A., Starczewska, M., and Papiernik, B. (2022). Future Technology Mix\u2014Enhanced Geothermal System (EGS) and Carbon Capture, Utilization, and Storage (CCUS)\u2014An Overview of Selected Projects as an Example for Future Investments in Poland. Energies, 15.","DOI":"10.3390\/en15103505"},{"key":"ref_20","first-page":"199","article-title":"Planowane wiercenie badawcze w Karkonoszach dla potrzeb modelowania termicznego system\u00f3w gor\u0105cych suchych ska\u0142 (HDR)","volume":"60","author":"Bujakowski","year":"2012","journal-title":"Przegl. Geol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"124822","DOI":"10.1016\/j.jclepro.2020.124822","article-title":"Criteria for selecting sites for integrated CO2 storage and geothermal energy recovery","volume":"285","year":"2021","journal-title":"J. Clear. Prod."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"351","DOI":"10.1016\/j.geothermics.2006.08.002","article-title":"Enhanced geothermal systems (EGS) using CO2 as working fluid\u2014A novel approach for generating renewable energy with simultaneous sequestration of carbon","volume":"35","author":"Pruess","year":"2006","journal-title":"Geothermics"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1186\/s40517-016-0044-x","article-title":"Modeling coupled convection and carbon dioxide injection for improved heat harvesting in geopressured geothermal reservoirs","volume":"4","author":"Plaksina","year":"2016","journal-title":"Geotherm. Energy"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"15","DOI":"10.2516\/ogst\/2020005","article-title":"Numerical modelling of the cooling effect in geothermal reservoirs induced by injection of CO2 and cooled geothermal water","volume":"75","author":"Liu","year":"2020","journal-title":"Oil Gas Sci. Technol. Rev. D\u2019ifp Energ. Nouv."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"175","DOI":"10.7494\/geol.2024.50.2.175","article-title":"Numerical modeling of the potential CO2-supplied enhanced geothermal system (CO2-EGS) in the \u00c5sgard field, Norway","volume":"50","author":"Miecznik","year":"2024","journal-title":"Geol. Geophys. Environ."},{"key":"ref_26","unstructured":"W\u00f3jcicki, A., Sowi\u017cd\u017ca\u0142, A., and Bujakowski, W. (2013). Ocena Potencja\u0142u, Bilansu Cieplnego i Perspektywicznych Struktur Geologicznych dla Potrzeb Zamkni\u0119tych System\u00f3w Geotermicznych (Hot Dry Rocks) w Polsce, Ministry of Environment."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"441","DOI":"10.1016\/j.renene.2015.02.018","article-title":"Modelling geothermal and operating parameters of EGS installations in the lower triassic sedimentary formations of the central Poland area","volume":"80","author":"Bujakowski","year":"2015","journal-title":"Renew. Energy"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1189","DOI":"10.1016\/j.jclepro.2019.05.036","article-title":"Prospects for the use of carbon dioxide in enhanced geothermal systems in Poland","volume":"229","author":"Tarkowski","year":"2019","journal-title":"J. Clean. Prod."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1863","DOI":"10.1007\/s10098-024-03081-w","article-title":"Life cycle assessment of enhanced geothermal systems with CO2 as a working fluid\u2014Polish case study","volume":"27","author":"Starczewska","year":"2025","journal-title":"Clean Technol. Environ. Policy"},{"key":"ref_30","first-page":"149","article-title":"Types of local tectonic structures in the Zechstein-Mesozoic complex of northwestern Poland","volume":"274","author":"Dadlez","year":"1974","journal-title":"Biul. Inst. Geol."},{"key":"ref_31","first-page":"391","article-title":"Geologiczna regionalizacja Polski\u2014Zasady og\u00f3lne i schemat podzia\u0142u w planie podkenozoicznym i podpermskim","volume":"56","author":"Narkiewicz","year":"2008","journal-title":"Przegl. Geol."},{"key":"ref_32","first-page":"895","article-title":"Regionalizacja tektoniczna Polski\u2014Ni\u017c Polsk","volume":"56","author":"Karnkowski","year":"2008","journal-title":"Przegl. Geol."},{"key":"ref_33","first-page":"680","article-title":"Geology, origin and evolution of the Gorz\u00f3w Block (NW Poland)","volume":"56","author":"Karnkowski","year":"2010","journal-title":"Przegl. Geol."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Moska, R., Labus, K., Kasza, P., and Moska, A. (2023). Geothermal potential of the Hot Dry Rock in south-east Baltic Basin countries\u2014A review. Energies, 16.","DOI":"10.3390\/en16041662"},{"key":"ref_35","first-page":"134768","article-title":"Petrophysical evaluation of the Lower Permian formation as a potential reservoir for CO2-EGS\u2014Case study from NW Poland","volume":"373","author":"Machowski","year":"2022","journal-title":"J. Clean. Prod."},{"key":"ref_36","first-page":"125","article-title":"Terrestrial heat flow density in Poland\u2014A new approach","volume":"53","author":"Szewczyk","year":"2009","journal-title":"Geol. Q."},{"key":"ref_37","unstructured":"Plewa, S. (1994). Rozk\u0142ad Parametr\u00f3w Geotermalnych na Obszarze Polski, CPPGSMiE PAN."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"881","DOI":"10.1007\/s00531-010-0526-1","article-title":"New terrestrial heat flow map of Europe after regional paleoclimatic correction application","volume":"100","author":"Majorowicz","year":"2011","journal-title":"Int. J. Earth Sci."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"649","DOI":"10.1007\/s00531-018-01673-8","article-title":"Thermal properties of the crust and the lithosphere\u2013asthenosphere boundary in the area of Poland from the heat flow variability and seismic data","volume":"108","author":"Majorowicz","year":"2019","journal-title":"Int. J. Earth Sci."},{"key":"ref_40","first-page":"11","article-title":"Differences Between Recent Heat Flow Maps of Poland and Deep Thermo-Seismic and Tectonic Age Constraints","volume":"3","author":"Majorowicz","year":"2020","journal-title":"Int. J. Terr. Heat Flow Appl."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"102864","DOI":"10.1016\/j.geothermics.2023.102864","article-title":"Technique and results of determination of vertical variations in rock thermal properties, temperature gradient and heat flow","volume":"116","author":"Popov","year":"2024","journal-title":"Geothermics"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.cageo.2016.09.009","article-title":"TOUGH3: A new efficient version of the TOUGH suite of multiphase flow and transport simulators","volume":"108","author":"Jung","year":"2017","journal-title":"Comput. Geosci."},{"key":"ref_43","doi-asserted-by":"crossref","unstructured":"Jung, Y., Pau, G.S.H., Finsterle, S., and Doughty, C. (2018). TOUGH3 User\u2019s Guid, Version 1.0, Lawrence Berkeley National Laboratory, University of California. Report no. LBNL-2001093.","DOI":"10.2172\/1461175"},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Pan, L., Spycher, N., Doughty, C., and Pruess, K. (2015). ECO2N V2.0: A TOUGH2 Fluid Property Module for Mixtures of Water, NaCl, and CO2, Lawrence Berkeley National Laboratory, University of California. Report no. LBNL-6930E.","DOI":"10.2172\/1170605"},{"key":"ref_45","unstructured":"Croucher, A. (2011, January 21\u201323). PyTOUGH: A Python scripting library for automating TOUGH2 simulations. Proceedings of the 33rd New Zealand Geothermal Workshop, Auckland, New Zealand."},{"key":"ref_46","unstructured":"Croucher, A. (2025). PyTOUGH User\u2019s Guide, Version 1.6.5, University of Auckland."},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Wojnarowski, P., and Janiga, D. Study of the Effectiveness of the EGS\/HDR Fracturing Process with the Application of a 3d Planar Fracture Propagation Model. SSRN, 2024. preprint.","DOI":"10.2139\/ssrn.4707654"},{"key":"ref_48","unstructured":"Ahmed, T. (2019). Reservoir Engineering Handbook, Gulf Professional Publishing. [5th ed.]."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"265","DOI":"10.1016\/S0378-3812(03)00041-4","article-title":"Solubility of CO2 in water from \u22121.5 to 100 \u00b0C and from 0.1 to 100 MPa: Evaluation of literature data and thermodynamic modelling","volume":"208","author":"Diamond","year":"2003","journal-title":"Fluid Phase Equilibria"},{"key":"ref_50","unstructured":"Steyn, M., Oglesby, J., Turan, G., Zapantis, A., and Gebremedhin, R. (2022). Global status of CCS 2022, Global CCS Institute."},{"key":"ref_51","unstructured":"(2025, January 24). CoolProp Thermophysical Fluid Properties Library, Ver. 6.1.1. Available online: http:\/\/www.coolprop.org."},{"key":"ref_52","unstructured":"Carslaw, H.S., and Jaeger, J.C. (1956). Conduction of Heat in Solids, Clarendon Press. [2nd ed.]."},{"key":"ref_53","unstructured":"Recknagel, H., Sprenger, E., and Schramek, E.H. (2008). Heating, Air-Conditioning, Hot Water, Cooling\u2014Hand Book (Polish: Ogrzewanie, Klimatyzacja, Ciep\u0142a Woda, Ch\u0142odnictwo\u2014Poradnik), OMNI SCALA."}],"container-title":["Energies"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1073\/18\/18\/4825\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T18:43:46Z","timestamp":1760035426000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1073\/18\/18\/4825"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,9,11]]},"references-count":53,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2025,9]]}},"alternative-id":["en18184825"],"URL":"https:\/\/doi.org\/10.3390\/en18184825","relation":{},"ISSN":["1996-1073"],"issn-type":[{"value":"1996-1073","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,9,11]]}}}