Project: Mapping and Assessment of Geothermal Plays in Deep Carbonate Rocks – Cross-domain Implications and Impacts

Acronym Hotlime (Reference Number: GeoE.171.007)
Duration 01/07/2018 - 30/06/2021
Project Topic Hydrothermal systems in deep carbonate bedrock are among the most promising low-enthalpy geothermal plays across Europe. Apart from a few areas where viability of hydrothermal heat and power generation has been proved, most deep carbonate bedrock has received relatively little attention, because such rocks are perceived as ‘tight’. Exploration and development of the deep subsurface is an acknowledged high-risk investment, particularly in low-enthalpy systems, where tapping suitable temperatures for geothermal energy commonly requires drilling to depths of more than 3 km. In order to de-risk these challenging geothermal plays, it is crucial to improve our understanding of geological conditions that determine the distribution and technical recoverability of their potential resources. The efficacy of carbonate-bedrock geothermal plays is crucially dependent on groundwater yield controlled by fracture conduits and karstification. This project will identify the generic structural controls in deep carbonate formations, through a comparison of geological situations and their structural inventory, as well as collation of deep borehole data and their petro- and hydro-physical characteristics. A consistent assessment and the sharing of knowledge – bringing all partners to a common high level – will result in uniformly applicable best practice workflows for estimation, comparison and prospectranking of hydrothermal resources in deep carbonate bedrock. Applied in specific target areas by means of 2D or 3D mapping and characterization, these spatial assessments will help in de-risking the setup or maturation of regional plays, will reveal possible cross-domain implications, and will support sustainable subsurface management.
Project Results
(after finalisation)
- Spatial resource assessments (2D, 3D) of areas in focus. - Report on best practice workflows & guidelines for characterization & mapping deep carbonate hydrothermal plays. - Web-based classification system for plays and prospects. - Assessment tool for doublet performance and the resources. - Common knowledge base grounded on the Linked Open Data Semantic Web (methodology; glossary of technical terms; user manual geared towards subsurface planning and management).
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Network GeoERA
Call GeoERA Cofund Call

Project partner

Number Name Role Country
1 Bayerisches Landesamt für Umwelt c Germany
2 Geological Survey Ireland Partner Ireland
3 Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek Partner Netherlands
4 Vlaams Instituut voor Technologisch Onderzoek. Partner Belgium
5 Geologische Bundesanstalt Partner Austria
6 Regierungspräsidium Freiburg Partner Germany
7 Istituto Superiore per la Protezione e la Ricerca Ambientale Partner Italy
8 Geološki zavod Slovenije Partner Slovenia
9 Servizio Geologico, Sismico e dei Suoli della Regione Emilia-Romagna Partner Italy
10 Hrvatski Geološki Institut – Croatian Geological Survey Partner Croatia
11 Office of the Prime Minister Partner Malta
12 Agenzia Regionale per la Protezione Ambientale del Piemonte Partner Italy
13 State Research and Development Enterprise – State Information Geological Fund of Ukraine Partner Ukraine
14 Ceska Geologicka Sluzba – Czech Geological Survey Partner Czech Republic
15 Regione Umbria Partner Italy
16 Institut Cartogràfic i Geològic de Catalunya Partner Spain