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Overcoming Challenges in the Classification of Deep Geothermal Potential : Volume 3, Issue 1 (07/04/2015)

By Breede, K.

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Book Id: WPLBN0004009982
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: Overcoming Challenges in the Classification of Deep Geothermal Potential : Volume 3, Issue 1 (07/04/2015)  
Author: Breede, K.
Volume: Vol. 3, Issue 1
Language: English
Subject: Science, Geothermal, Energy
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Falcone, G., Dzebisashvili, K., & Breede, K. (2015). Overcoming Challenges in the Classification of Deep Geothermal Potential : Volume 3, Issue 1 (07/04/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Dept. of Geothermal Engineering and Integrated Energy Systems, Institute of Petroleum Engineering, Clausthal University of Technology, Clausthal, Germany. The geothermal community lacks a universal definition of deep geothermal systems. A minimum depth of 400 m is often assumed, with a further sub-classification into middle-deep geothermal systems for reservoirs found between 400 and 1000 m. Yet, the simplistic use of a depth cut-off is insufficient to uniquely determine the type of resource and its associated potential. Different definitions and criteria have been proposed in the past to frame deep geothermal systems. However, although they have valid assumptions, these frameworks lack systematic integration of correlated factors. To further complicate matters, new definitions such as hot dry rock (HDR), enhanced or engineered geothermal systems (EGSs) or deep heat mining have been introduced over the years. A clear and transparent approach is needed to estimate the potential of deep geothermal systems and be capable of distinguishing between resources of a different nature. In order to overcome the ambiguity associated with some past definitions such as EGS, this paper proposes the return to a more rigorous petrothermal versus hydrothermal classification. This would be superimposed with numerical criteria for the following: depth and temperature; predominance of conduction, convection or advection; formation type; rock properties; heat source type; requirement for formation stimulation and corresponding efficiency; requirement to provide the carrier fluid; well productivity (or injectivity); production (or circulation) flow rate; and heat recharge mode. Using the results from data mining of past and present deep geothermal projects worldwide, a classification of the same, according to the aforementioned criteria is proposed.

Summary
Overcoming challenges in the classification of deep geothermal potential

Excerpt
AGRCC: Australian Geothermal Reporting Code Committee: Geothermal lexicon for resources and reserves definition and reporting, 2nd edn. Australian Geothermal Reporting Code Committee, Adelaide, p. 67, 2010.; Atkins Ltd: Deep Geothermal Review Study, Version 5.0, 21 October 2013.; Baria, R., Bennett, T., Macpherson-Grant, G., Baumgaertner, J., and Jupe, A.: Cornish Rocks – Hotting Up? European Geothermal Congress (EGC) 2013, Pisa, Italy, 3–7 June 2013.; Barnet, P.: Large scale hot sedimentary aquifer (HSA) geothermal projects, Presentation to Victoria Energy Conference, Melbourne, 27 August 2009.; Beardsmore, G. and Matthews, C.: Parachilna Geothermal Play, Statement of Inferred Geothermal Resources, Torrens Energy Limited, 15 August 2008.; Baumgärtner, J.: Insheim and Landau – recent experiences with EGS technology in the Upper Rhine Graben, oral presentation presented at ICEGS 2012, Freiburg, 25 May 2012.; Bendall, B., Hogarth, R., Holl, H., McMahon, A., Larking A., and Reid, P.: Australian Experiences in EGS Permeability Enhancement – A Review of 3 Case Studies. PROCEEDINGS, Thirty-Ninth Workshop on Geothermal Reservoir Engineering, SGP-TR-202, Stanford University, Stanford, California, 24–26 February 2014.; BGR (2014a): GeneSys Horstberg, http://www.genesys-hannover.de/Genesys/EN/Horstberg/horstberg_ node_en.html, last access: 2 June 2014.; BGR (2014b): Milestones of the Genesys project, http://www.bgr.bund.de/Genesys/EN/Meilensteine/meilensteine_ inhalt_en.html, last access: 2 June 2014.; BGR (2014c): GeneSys, http://www.genesys-hannover.de/Genesys/DE/Home/genesys_node.html, last access: 10 June 2014; BINE (2012): Korrosion in geothermischen Anlagen. http://www.bine.info/service/bestellen/download-print/publikation/korrosion-in-geothermischen-anlagen/korrosion-und-materialqualifizierung/, last access: 2 June 2014.; Blöcher, G., Zimmermann, G., Moeck, I., and Huenges, E.: Groß-Schönebeck (D) – the development of the learning curve: experience from the projects of recent years. Oral presentation presented at ICEGS 2012, Freiburg, 25 May 2012.; Bloomquist, R.: Integrating small power plants into agricultural projects, pangea.stanford.edu/ERE/pdf/IGAstandard/EGC/szeged/I-8-01.pdf, last access: 3 June 2014.; Dumas, P.: NER300: what for geothermal? Oral presentation held at second EGEC TP geoelec meeting, Brussels, 24 March 2010.; EGEC: EGEC Market report 2013/2014, third edition, December 2013.; BMU: Tiefe Geothermie – Nutzungsmöglichkeiten in Deutschland, Beltz Bad Langensalza GmbH, BT Weimar, Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit, Referat Öffentlichkeitsarbeit, Berlin, 2011.; Bracke, R.: Geothermal energy – low enthalpy technologies. Oral presentation presented at Congreso Nacional de Energia 2012, CICR, San Jose/Costa Rica, 15–16 February 2012.; Breede, K., Dzebisashvili, K., Liu, X., and Falcone, G.: A systematic review of enhanced (or engineered) geothermal systems: past, present and future, Geotherm Energ., 1, doi:10.1186/2195-9706-1-4, 2013.; Bridgland, D.: United Downs Deep Geothermal Project, Progress Summary of Geothermal Engineering Ltd., 17 November 2011.; Bromley, C. J. and Mongillo, M. A.: Geothermal energy from fractured reservoirs – dealing with induced seismicity. In: IEA OPEN Energy Technology Bulletin, Issue No. 48, IEA, h

 

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