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  1. Fiber optic sensing has gained importance for wellbore monitoring and reservoir characterization in geothermal fields as it allows continuous, spatially highly resolved measurements. Distributed acoustic sensi...

    Authors: Felix Schölderle, Martin Lipus, Daniela Pfrang, Thomas Reinsch, Sven Haberer, Florian Einsiedl and Kai Zosseder
    Citation: Geothermal Energy 2021 9:21
  2. The 3.1- and 3.7-km-deep FFC-1 and DGE-1 geothermal explorations wells drilled into the Precambrian crystalline basement on the southern margin of the Fennoscandian Shield are evaluated regarding experiences f...

    Authors: Jan-Erik Rosberg and Mikael Erlström
    Citation: Geothermal Energy 2021 9:20
  3. Previous studies optimized the dimensions of coaxial heat exchangers using constant mass flow rates as a boundary condition. They show a thermal optimal circular ring width of nearly zero. Hydraulically optima...

    Authors: Tobias Blanke, Markus Hagenkamp, Bernd Döring, Joachim Göttsche, Vitali Reger and Markus Kuhnhenne
    Citation: Geothermal Energy 2021 9:19
  4. Geothermal scientists have used bottom-hole temperature data from extensive oil and gas well datasets to generate heat flow and temperature-at-depth maps to locate potential geothermally active regions. Consid...

    Authors: Arya Shahdi, Seho Lee, Anuj Karpatne and Bahareh Nojabaei
    Citation: Geothermal Energy 2021 9:18
  5. In this paper, we present an analysis using unsupervised machine learning (ML) to identify the key geologic factors that contribute to the geothermal production in Brady geothermal field. Brady is a hydrotherm...

    Authors: Drew L. Siler, Jeff D. Pepin, Velimir V. Vesselinov, Maruti K. Mudunuru and Bulbul Ahmmed
    Citation: Geothermal Energy 2021 9:17
  6. In geothermal reservoir systems, changes in pore pressure due to production (depletion), injection or temperature changes result in a displacement of the effective stresses acting on the rock matrix of the aqu...

    Authors: Daniel Bohnsack, Martin Potten, Simon Freitag, Florian Einsiedl and Kai Zosseder
    Citation: Geothermal Energy 2021 9:15
  7. Oil and gas operations in sedimentary basins have revealed the occurrence of significant temperature anomalies at depth, raising the possibility of major geothermal resource potential in the sedimentary sequen...

    Authors: Oladoyin Kolawole, Ion Ispas, Folarin Kolawole, Christophe Germay and John D. McLennan
    Citation: Geothermal Energy 2021 9:14
  8. Production data from the Los Humeros geothermal field in Mexico are used to develop a forecast method for operation of the field in the future. This method supports understanding the limitations of sustainably...

    Authors: Héctor González-García, Henning Francke, Ingo Sass and Ernst Huenges
    Citation: Geothermal Energy 2021 9:13
  9. The installed capacity of geothermal systems for direct use of heat is increasing worldwide. As their number and density is increasing, the their interaction with subsurface faults becomes more important as th...

    Authors: Caroline Zaal, Alexandros Daniilidis and Femke C. Vossepoel
    Citation: Geothermal Energy 2021 9:12
  10. A system of borehole heat exchangers (BHEs) combined with pumping–injection wells is established in areas where the groundwater is shallow and the seepage velocity is weak. The pumping and injection wells are ...

    Authors: Jiuchen Ma, Qian Jiang, Qiuli Zhang, Yacheng Xie, Yahui Wang and Feiyu Yi
    Citation: Geothermal Energy 2021 9:11
  11. Advances in new technologies and the desire to achieve a sustainable and safe energy supply, enable communities to transition from conventional to renewable resources, such as geothermal energy. Perception and...

    Authors: D. Balzan-Alzate, J. López-Sánchez, D. Blessent, J. Raymond, C. Dezayes, J. P. Portela, E. Ramírez Restrepo, D. Moreno Rendón, M. Malo, P. Goderniaux, L. Daniele and T. Le Borgne
    Citation: Geothermal Energy 2021 9:9
  12. There are many successful geothermal projects that exploit the Upper Jurassic aquifer at 2–3 km depth in the German Molasse Basin. However, up to now, only P-wave seismic exploration has been carried out. In a...

    Authors: Britta Wawerzinek, Hermann Buness, Hartwig von Hartmann and David C. Tanner
    Citation: Geothermal Energy 2021 9:6
  13. Cementing operations in wellbores, especially for long casings, are often challenging and prone to deficiencies when not properly planned and executed. While exploring for and exploiting of geothermal resource...

    Authors: Martin P. Lipus, Thomas Reinsch, Tobias B. Weisenberger, Steinar Kragset, Ari Stefánsson and Sigurdur G. Bogason
    Citation: Geothermal Energy 2021 9:5
  14. Alternative (unconventional) deep geothermal designs are needed to provide a secure and efficient geothermal energy supply. An in-depth sensitivity analysis was investigated considering a deep borehole closed-...

    Authors: Hannah R. Doran, Theo Renaud, Gioia Falcone, Lehua Pan and Patrick G. Verdin
    Citation: Geothermal Energy 2021 9:4
  15. Although geothermal resources are practically independent of climate factors, those factors significantly condition the potential use of the Earth’s natural heat resources. Unlike all the other factors limitin...

    Authors: Bartłomiej Ciapała, Jakub Jurasz, Mirosław Janowski and Beata Kępińska
    Citation: Geothermal Energy 2021 9:3

    The Correction to this article has been published in Geothermal Energy 2021 9:22

  16. To study the influence of thermal shock caused by water-cooling on the physical and mechanical properties of high-temperature granite, granite was subjected to an increasing number of high-temperature (300 °C)...

    Authors: Li Yu, Hai-Wang Peng, Yu Zhang and Guo-wei Li
    Citation: Geothermal Energy 2021 9:2
  17. A geochemometric study based on a multi-criteria decision analysis was applied, for the first time, for the optimal evaluation and selection of artificial neural networks, and the prediction of geothermal rese...

    Authors: A. Acevedo-Anicasio, E. Santoyo, D. Pérez-Zárate, Kailasa Pandarinath, M. Guevara and L. Díaz-González
    Citation: Geothermal Energy 2021 9:1
  18. The majority of scales observed at geothermal facilities exploring the Malm Aquifer in the Bavarian Molasse Basin are carbonates. They form due to a disruption of the lime–carbonic acid equilibrium during prod...

    Authors: Bernhard Köhl, Martin Elsner and Thomas Baumann
    Citation: Geothermal Energy 2020 8:26
  19. Knowledge of the crustal stress state is important for the assessment of subsurface stability. In particular, stress magnitudes are essential for the calibration of geomechanical models that estimate a continu...

    Authors: Sophia Morawietz, Oliver Heidbach, Karsten Reiter, Moritz Ziegler, Mojtaba Rajabi, Günter Zimmermann, Birgit Müller and Mark Tingay
    Citation: Geothermal Energy 2020 8:25
  20. Uranium and thorium decay series disequilibria in deep geothermal brines are a result of water–rock interaction processes. The migratory behavior of radionuclides provides valuable site-specific information an...

    Authors: Lena Kölbel, Thomas Kölbel, Ulrich Maier, Martin Sauter, Thorsten Schäfer and Bettina Wiegand
    Citation: Geothermal Energy 2020 8:24
  21. Mineral precipitates, scales, are wide-spread in geothermal facilities and hamper technical and economic efficiency. Scales reported from earlier studies in the Bavarian Molasse Basin consisted mostly of calci...

    Authors: Bernhard Köhl, James Grundy and Thomas Baumann
    Citation: Geothermal Energy 2020 8:23
  22. Classification schemes for geothermal energy sources have recently been improved to include the concept of geothermal play. Our comprehensive review for the island of Madagascar aims to enhance the understandi...

    Authors: M. Rajaobelison, J. Raymond, M. Malo and C. Dezayes
    Citation: Geothermal Energy 2020 8:22
  23. The North Alpine Foreland Basin in SE Germany is Germany’s most active deep geothermal province. However, in its southern and eastern part the basin is considerably overpressured, which is a significant challe...

    Authors: Michael C. Drews, Peter Hofstetter, Kai Zosseder, Vladimir Shipilin and Harald Stollhofen
    Citation: Geothermal Energy 2020 8:20
  24. The deep borehole heat exchanger (DBHE) shows great potential in seasonal thermal energy storage and its high performance efficiency with smaller land occupancy attracts increasing attention as a promising geo...

    Authors: Yazhou Zhao, Zhonghe Pang, Yonghui Huang and Zhibo Ma
    Citation: Geothermal Energy 2020 8:18

    The Correction to this article has been published in Geothermal Energy 2021 9:7

  25. When water is injected into a fracture-dominated reservoir that is cooler or hotter than the injected water, the reservoir permeability is expected to be altered by the injection-induced thermo-mechanical effe...

    Authors: Anniina Kittilä, Mohammadreza Jalali, Martin O. Saar and Xiang-Zhao Kong
    Citation: Geothermal Energy 2020 8:17
  26. To improve the economics and viability of accessing deep georesources, we propose a combined thermo–mechanical drilling (CTMD) method, employing a heat source to facilitate the mechanical removal of rock, with...

    Authors: Edoardo Rossi, Martin O. Saar and Philipp Rudolf von Rohr
    Citation: Geothermal Energy 2020 8:16
  27. Gravity measurements in the Upper Rhine Graben evidence spatial variations at the regional scale and close to the geothermal sites. They are classically interpreted as linked to the geology. We aim to bring ne...

    Authors: Bérénice Vallier, Vincent Magnenet, Jean Schmittbuhl and Christophe Fond
    Citation: Geothermal Energy 2020 8:13
  28. For the successful realization and productivity prediction of new hydrothermal projects in the South German Molasse Basin, the hydraulic matrix properties of the Upper Jurassic Malm reservoir have to be determ...

    Authors: D. Bohnsack, M. Potten, D. Pfrang, P. Wolpert and K. Zosseder
    Citation: Geothermal Energy 2020 8:12
  29. Knowledge of the undisturbed stress state is a key parameter for borehole stability, productivity and induced seismicity hazard assessment. Due to the sparse and incomplete availability of data records, 3D geo...

    Authors: Moritz O. Ziegler and Oliver Heidbach
    Citation: Geothermal Energy 2020 8:11
  30. The beginnings of geothermal implementation research in Poland date back to 1989–1993 when the Mineral and Energy Economy Research Institute of the Polish Academy of Sciences (MEERI PAS) launched the first geo...

    Authors: Wiesław Bujakowski, Bogusław Bielec, Maciej Miecznik and Leszek Pająk
    Citation: Geothermal Energy 2020 8:10
  31. The authors have retracted this article (Drews et al. 2019) because some data have been used without the appropriate permissions. Additionally, the funding statement is not complete and the authorship is incor...

    Authors: Michael C. Drews, Peter Hofstetter, Kai Zosseder, Robert Straubinger, Andreas Gahr and Harald Stollhofen
    Citation: Geothermal Energy 2020 8:8

    The original article was published in Geothermal Energy 2019 7:3

  32. Crystallization of carbonates is a key process affecting the operation of geothermal facilities and aquifer heat storage systems. The crystals formed in an aquifer heat storage test in the Upper Jurassic carbo...

    Authors: Martina Ueckert, Carina Wismeth and Thomas Baumann
    Citation: Geothermal Energy 2020 8:7
  33. Deep-borehole heat exchangers (DBHE) are generally coaxial pipes installed in deep boreholes and has become an alternative approach to utilize geothermal energy. Since the performance of the DBHE system can be...

    Authors: Sheng Pan, Yanlong Kong, Chaofan Chen, Zhonghe Pang and Jiyang Wang
    Citation: Geothermal Energy 2020 8:6
  34. The development of the Rittershoffen deep geothermal field (Alsace, Upper Rhine Graben) between 2012 and 2014 induced unfelt seismicity with a local magnitude of less than 1.6. This seismicity occurred during ...

    Authors: Vincent Maurer, Emmanuel Gaucher, Marc Grunberg, Rike Koepke, Romain Pestourie and Nicolas Cuenot
    Citation: Geothermal Energy 2020 8:5
  35. The energetic framework of Canadian remote communities relies on fossil fuels. This has adverse environmental and energy security issues. In order to offset diesel consumption, the search for local, sustainabl...

    Authors: M. M. Miranda, N. Giordano, J. Raymond, A. J. S. C. Pereira and C. Dezayes
    Citation: Geothermal Energy 2020 8:4
  36. Anticosti Island is located in the Anticosti sedimentary basin, an Ordovician/Silurian carbonate platform. This platform is mainly composed of limestone and shale with some dolomite and sandstone and reaches u...

    Authors: Violaine Gascuel, Karine Bédard, Félix-Antoine Comeau, Jasmin Raymond and Michel Malo
    Citation: Geothermal Energy 2020 8:3
  37. For successful geothermal reservoir exploration, accurate temperature estimation is essential. Since reservoir temperature estimation frequently involves high uncertainties when using conventional solute geoth...

    Authors: Lars H. Ystroem, Fabian Nitschke, Sebastian Held and Thomas Kohl
    Citation: Geothermal Energy 2020 8:2
  38. Precise knowledge of the subsurface thermal field plays a key role in the assessment of geothermal targets. Unfortunately, deep underground temperature data is generally scarce and a matter of research. To ach...

    Authors: Ben Norden, Andrea Förster, Hans-Jürgen Förster and Sven Fuchs
    Citation: Geothermal Energy 2020 8:1
  39. The Upper Rhine Graben (URG) has been extensively studied for geothermal exploitation over the past decades. Yet, the thermal conductivity of the sedimentary cover is still poorly constrained, limiting our abi...

    Authors: Pauline Harlé, Alexandra R. L. Kushnir, Coralie Aichholzer, Michael J. Heap, Régis Hehn, Vincent Maurer, Patrick Baud, Alexandre Richard, Albert Genter and Philippe Duringer
    Citation: Geothermal Energy 2019 7:38

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