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An online survey to explore the awareness and acceptance of geothermal energy among an educated segment of the population in five European and American countries Geotherm. Energy (IF 2.204) Pub Date : 2021-03-02 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; T. Le Borgne
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 acceptance amongst different audiences have a high impact on the feasibility of energy projects, which is an important aspect to analyze. For this reason, this study focuses on describing the
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Evaluation of NaCl and MgCl2 heat exchange fluids in a deep binary geothermal system in a sedimentary halite formation Geotherm. Energy (IF 2.204) Pub Date : 2021-02-27 Kayla R. Moore; Hartmut M. Holländer
Halite formations are attractive geothermal reservoirs due to their high heat conductivity, resulting in higher temperatures than other formations at similar depths. However, halite formations are highly reactive with undersaturated water. An understanding of the geochemical reactions that occur within halite-saturated formation waters can inform decision making regarding well construction, prevention
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Correction to: An efficient hybrid model for thermal analysis of deep borehole heat exchangers Geotherm. Energy (IF 2.204) Pub Date : 2021-02-25 Yazhou Zhao; Zhonghe Pang; Yonghui Huang; Zhibo Ma
An amendment to this paper has been published and can be accessed via the original article.
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S-wave experiments for the exploration of a deep geothermal carbonate reservoir in the German Molasse Basin Geotherm. Energy (IF 2.204) Pub Date : 2021-02-19 Britta Wawerzinek; Hermann Buness; Hartwig von Hartmann; David C. Tanner
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 an experiment in the Greater Munich area, we recorded S-waves that were generated by the conventional P-wave seismic survey, using 3C receivers. From this, we built a 3D volume of P- to S-converted
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Monitoring of a reverse cement job in a high-temperature geothermal environment Geotherm. Energy (IF 2.204) Pub Date : 2021-02-18 Martin P. Lipus; Thomas Reinsch; Tobias B. Weisenberger; Steinar Kragset; Ari Stefánsson; Sigurdur G. Bogason
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 resources at temperatures above the critical point of water was attempted in different drilling projects in recent years, the well design, and especially the procedure to run and cement long production
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Modelling an unconventional closed-loop deep borehole heat exchanger (DBHE): sensitivity analysis on the Newberry volcanic setting Geotherm. Energy (IF 2.204) Pub Date : 2021-02-15 Hannah R. Doran; Theo Renaud; Gioia Falcone; Lehua Pan; Patrick G. Verdin
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-loop heat exchanger (DBHE) to overcome the current limitations of deep EGS. A T2Well/EOS1 model previously calibrated on an experimental DBHE in Hawaii was adapted to the current NWG 55-29 well
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Climate factors influencing effective use of geothermal resources in SE Poland: the Lublin trough Geotherm. Energy (IF 2.204) Pub Date : 2021-02-08 Bartłomiej Ciapała; Jakub Jurasz; Mirosław Janowski; Beata Kępińska
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 limiting or facilitating the use of geothermal heat (like receivers’ temperature expectation, financial issues or local regulations), climate factors remain immovable. Thus, climate remains the main
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Mechanical test of granite with multiple water–thermal cycles Geotherm. Energy (IF 2.204) Pub Date : 2021-01-26 Li Yu; Hai-Wang Peng; Yu Zhang; Guo-wei Li
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) water-cooling and thermal shock treatment cycles, and static mechanical experiments were carried out on the treated granite. The results support the following conclusions: (1) thermal shock causes
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GaS_GeoT: A computer program for an effective use of newly improved gas geothermometers in predicting reliable geothermal reservoir temperatures Geotherm. Energy (IF 2.204) Pub Date : 2021-01-18 A. Acevedo-Anicasio; E. Santoyo; D. Pérez-Zárate; Kailasa Pandarinath; M. Guevara; L. Díaz-González
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 reservoir temperatures. Eight new gas geothermometers (GasG1 to GasG8) were derived from this study. For an effective and practical application of these geothermometers, a new computer program GaS_GeoT
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A new method for correcting temperature log profiles in low-enthalpy plays Geotherm. Energy (IF 2.204) Pub Date : 2020-11-09 Sandra Schumacher; Inga Moeck
Temperature logs recorded shortly after drilling operations can be the only temperature information from deep wells. However, these measurements are still influenced by the thermal disturbance caused by drilling and therefore do not represent true rock temperatures. The magnitude of the thermal disturbance is dependent on many factors such as drilling time, logging procedure or mud temperature. However
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Hydrochemical and operational parameters driving carbonate scale kinetics at geothermal facilities in the Bavarian Molasse Basin Geotherm. Energy (IF 2.204) Pub Date : 2020-10-20 Bernhard Köhl; Martin Elsner; Thomas Baumann
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 production caused by a reduction of the partial pressure of carbon dioxide due to pressure change and degassing. These scales are found at the pumps, production pipes, filters, heat exchangers, and
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An open-access stress magnitude database for Germany and adjacent regions Geotherm. Energy (IF 2.204) Pub Date : 2020-09-22 Sophia Morawietz; Oliver Heidbach; Karsten Reiter; Moritz Ziegler; Mojtaba Rajabi; Günter Zimmermann; Birgit Müller; Mark Tingay
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 continuous description of the 3-D stress field from pointwise and incomplete stress data. Well established is the World Stress Map Project, a global and publicly available database for stress orientations
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Water–rock interactions in the Bruchsal geothermal system by U–Th series radionuclides Geotherm. Energy (IF 2.204) Pub Date : 2020-09-08 Lena Kölbel; Thomas Kölbel; Ulrich Maier; Martin Sauter; Thorsten Schäfer; Bettina Wiegand
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 and can therefore be an important tool for reservoir characterization and sustainable management of geothermal sites. In this study, we present data from long-term monitoring of naturally occurring
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Rippled scales in a geothermal facility in the Bavarian Molasse Basin: a key to understand the calcite scaling process Geotherm. Energy (IF 2.204) Pub Date : 2020-08-20 Bernhard Köhl; James Grundy; Thomas Baumann
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 calcite, appeared rather homogeneous, grew flat and perpendicular to the surface, and showed little or no internal macrostructure apart from small gradients in crystal size and chemical composition
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Classification of geothermal systems in Madagascar Geotherm. Energy (IF 2.204) Pub Date : 2020-07-28 M. Rajaobelison; J. Raymond; M. Malo; C. Dezayes
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 understanding of the factors controlling the country’s geothermal energy sources. The result is the first catalogue of geothermal systems in Madagascar. The geothermal systems of six prospective areas were
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Hydrogen sulfide removal from geothermal fluids by Fe(III)-based additives Geotherm. Energy (IF 2.204) Pub Date : 2020-07-14 S. Regenspurg; J. Iannotta; E. Feldbusch; F. J. Zimmermann; F. Eichinger
A new method to remove hydrogen sulfide from geothermal fluids during well operation was tested in situ at a geothermal site in Vienna (Austria). For this purpose, ferric iron was added either as granulated iron hydroxide or as FeCl3 solution into a reaction vessel containing the thermal water directly removed from the wells. From the container, the water would be pumped through a particle filter.
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Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well Geotherm. Energy (IF 2.204) Pub Date : 2020-07-11 Michael C. Drews; Peter Hofstetter; Kai Zosseder; Vladimir Shipilin; Harald Stollhofen
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 challenge for drilling deep geothermal wells. In this study, we combine drilling data and velocity-based pore pressure analyses with 3D basin modeling to assess the predictability and controlling factors
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The potential of coupled carbon storage and geothermal extraction in a CO2-enhanced geothermal system: a review Geotherm. Energy (IF 2.204) Pub Date : 2020-06-15 Yu Wu; Pan Li
The increasing demand for energy makes it difficult to replace fossil fuels with low-carbon energy sources in the short term, and the large amount of CO2 emitted by fossil fuel combustion increases global warming. Carbon capture and storage (CCS) technologies for reducing CO2 emissions in power plants and industrial processes have been developed. High costs and security issues limit industrial applications
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An efficient hybrid model for thermal analysis of deep borehole heat exchangers Geotherm. Energy (IF 2.204) Pub Date : 2020-06-15 Yazhou Zhao; Zhonghe Pang; Yonghui Huang; Zhibo Ma
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 geothermal energy exploitation technique. With respect to a vertical BHE with extremely long length pipes buried underground, thermal analysis of the unsteady heat transfer process of the system
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Solute tracer test quantification of the effects of hot water injection into hydraulically stimulated crystalline rock Geotherm. Energy (IF 2.204) Pub Date : 2020-06-05 Anniina Kittilä; Mohammadreza Jalali; Martin O. Saar; Xiang-Zhao Kong
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 effects, resulting in the redistribution of fluid flow in the reservoir. These effects are important to be taken into account when evaluating the performance and lifetime particularly of Enhanced
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The influence of thermal treatment on rock–bit interaction: a study of a combined thermo–mechanical drilling (CTMD) concept Geotherm. Energy (IF 2.204) Pub Date : 2020-05-27 Edoardo Rossi; Martin O. Saar; Philipp Rudolf von Rohr
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 the aim of increasing drilling performance and thereby reducing the overall costs, especially for deep wells in hard rocks. In this work, we employ a novel experiment setup to investigate the
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From exploration to operation: research developments in deep geothermal energy Geotherm. Energy (IF 2.204) Pub Date : 2020-05-19 Alexandra R. L. Kushnir; Markus Loewer
By providing solutions for harnessing subsurface resources, the geosciences will emerge as a critical component of an efficient transition to a low-carbon economy. In particular, the potential for geothermal energy to supply clean base-load energy for heating and electricity worldwide is enormous. If developed appropriately, this georesource will play a decisive role in the global switch to renewable
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Physical property evolution of granite during experimental chemical stimulation Geotherm. Energy (IF 2.204) Pub Date : 2020-04-29 Jamie I. Farquharson; Alexandra R. L. Kushnir; Bastien Wild; Patrick Baud
The Soultz-sous-Forêts geothermal reservoir (France)—in particular, the GPK-4 well—has been proposed as a target for chemical stimulation under the DESTRESS Horizon-2020 framework. With a combination of batch reaction tests and acid flow-through experiments using hydrochloric acid (HCl) at different molarities and temperatures, we investigate the potential for acid-induced permeability enhancement
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THM modeling of gravity anomalies related to deep hydrothermal circulation at Soultz-sous-Forêts (France) Geotherm. Energy (IF 2.204) Pub Date : 2020-04-26 Bérénice Vallier; Vincent Magnenet; Jean Schmittbuhl; Christophe Fond
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 new insights on another potential origin of these gravity changes. Our approach is to quantify gravity anomalies related to the deep hydrothermal circulation. A thermo-hydro-mechanical model is
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Porosity–permeability relationship derived from Upper Jurassic carbonate rock cores to assess the regional hydraulic matrix properties of the Malm reservoir in the South German Molasse Basin Geotherm. Energy (IF 2.204) Pub Date : 2020-04-07 D. Bohnsack; M. Potten; D. Pfrang; P. Wolpert; K. Zosseder
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 determined as accurately as possible. To obtain specific information on the distribution of the petrophysical parameters (e.g., rock density, porosity, and permeability) 363 samples of rare drilling
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The 3D stress state from geomechanical–numerical modelling and its uncertainties: a case study in the Bavarian Molasse Basin Geotherm. Energy (IF 2.204) Pub Date : 2020-03-24 Moritz O. Ziegler; Oliver Heidbach
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 geomechanical–numerical modelling is applied to estimate the stress state in a volume. To assess the quality of the model results, the model uncertainties have to be quantified. We present an approach
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Reconstruction of geothermal boreholes in Poland Geotherm. Energy (IF 2.204) Pub Date : 2020-03-24 Wiesław Bujakowski; Bogusław Bielec; Maciej Miecznik; Leszek Pająk
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 geothermal installation in the Podhale region, using the reconstructed Bańska IG-1 well. The knowledge acquired during these 30 years has highlighted the importance of geothermal energy—among other
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Laboratory tests simulating corrosion in geothermal power plants: influence of service conditions Geotherm. Energy (IF 2.204) Pub Date : 2020-03-19 Ana Vallejo Vitaller; Ueli M. Angst; Bernhard Elsener
One of the main challenges associated with the operation and maintenance of binary geothermal power plants is the degradation of construction materials. In this sense, it is crucial to apply appropriate preventive maintenance in critical components (such as the wellheads, heat exchangers, or pipes), while reducing shutdown times. Based on electrochemical measurements performed in an autoclave corrosion
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Retraction Note to: Predictability and controlling factors of overpressure in the North Alpine Foreland Basin, SE Germany: an interdisciplinary post-drill analysis of the Geretsried GEN-1 deep geothermal well Geotherm. Energy (IF 2.204) Pub Date : 2020-03-18 Michael C. Drews; Peter Hofstetter; Kai Zosseder; Robert Straubinger; Andreas Gahr; Harald Stollhofen
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 incorrect.
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Crystallization of calcium carbonate in a large-scale push–pull heat storage test in the Upper Jurassic carbonate aquifer Geotherm. Energy (IF 2.204) Pub Date : 2020-02-05 Martina Ueckert; Carina Wismeth; Thomas Baumann
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 carbonate aquifer were investigated at injection temperatures of $$65\,^{\circ }\hbox {C}$$ to $$110\,^{\circ }\hbox {C}$$, with varying $$\hbox {CO}_{2}$$ partial pressures, and varying Mg/Ca ratios
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Optimization of the utilization of deep borehole heat exchangers Geotherm. Energy (IF 2.204) Pub Date : 2020-02-05 Sheng Pan; Yanlong Kong; Chaofan Chen; Zhonghe Pang; Jiyang Wang
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 affected by several parameters, it is important to optimize the design of parameters for the DBHE. In this paper, based on the analytical method, we carried out the sensitivity analysis of DBHE
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Seismicity induced during the development of the Rittershoffen geothermal field, France Geotherm. Energy (IF 2.204) Pub Date : 2020-02-05 Vincent Maurer; Emmanuel Gaucher; Marc Grunberg; Rike Koepke; Romain Pestourie; Nicolas Cuenot
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 two types of operations: (1) mud losses in the Muschelkalk formation during the drilling of both wells of the doublet and (2) thermal and hydraulic stimulations of the GRT-1 well. Seismicity was
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Thermophysical properties of surficial rocks: a tool to characterize geothermal resources of remote northern regions Geotherm. Energy (IF 2.204) Pub Date : 2020-02-05 M. M. Miranda; N. Giordano; J. Raymond; A. J. S. C. Pereira; C. Dezayes
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, sustainable and carbon-free energy sources is of utmost importance. Unfortunately, in such remote regions, subsurface data to evaluate the geothermal potential is often nonexistent. This raises a key question:
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Geothermal resource assessment of remote sedimentary basins with sparse data: lessons learned from Anticosti Island, Canada Geotherm. Energy (IF 2.204) Pub Date : 2020-01-27 Violaine Gascuel; Karine Bédard; Félix-Antoine Comeau; Jasmin Raymond; Michel Malo
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 up to 5 km depth in the southwest. It overlies a Precambrian basement of the Grenville Province made of magmatic and metamorphic rocks. Like most remote and off-grid regions in Canada, it relies
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A multicomponent geothermometer for high-temperature basalt settings Geotherm. Energy (IF 2.204) Pub Date : 2020-01-27 Lars H. Ystroem; Fabian Nitschke; Sebastian Held; Thomas Kohl
For successful geothermal reservoir exploration, accurate temperature estimation is essential. Since reservoir temperature estimation frequently involves high uncertainties when using conventional solute geothermometers, a new statistical approach is proposed. The focus of this study is on the development of a new multicomponent geothermometer tool which requires a significantly reduced data set compared
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Temperature and pressure corrections applied to rock thermal conductivity: impact on subsurface temperature prognosis and heat-flow determination in geothermal exploration Geotherm. Energy (IF 2.204) Pub Date : 2020-01-24 Ben Norden; Andrea Förster; Hans-Jürgen Förster; Sven Fuchs
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 achieve first estimates for subsurface temperatures, steady-state conductive thermal modeling is commonly applied. Thereby the rock thermal conductivity is an essential parameter, which is usually
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Heat flow density estimates in the Upper Rhine Graben using laboratory measurements of thermal conductivity on sedimentary rocks Geotherm. Energy (IF 2.204) Pub Date : 2019-12-28 Pauline Harlé; Alexandra R. L. Kushnir; Coralie Aichholzer; Michael J. Heap; Régis Hehn; Vincent Maurer; Patrick Baud; Alexandre Richard; Albert Genter; Philippe Duringer
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 ability to provide robust heat flow density estimates. To improve our understanding of heat flow density in the URG, we present a new large thermal conductivity database for sedimentary rocks collected
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First field application of temperature sensor modules for groundwater flow detection near borehole heat exchanger Geotherm. Energy (IF 2.204) Pub Date : 2019-12-09 Alexander Michalski; Norbert Klitzsch
Here, we present the first application of a temperature sensor module (TSM) for deducing groundwater flow velocity and direction at borehole heat exchangers (BHEs). The TSM maps the horizontal temperature distribution around a BHE. As groundwater flow distorts this temperature distribution, flow velocity and direction can be inferred from the measured temperatures. As modular systems, TSMs can be attached
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Investigation on geothermal binary-flashing cycle employing zeotropic mixtures as working fluids Geotherm. Energy (IF 2.204) Pub Date : 2019-12-05 Lingbao Wang; Xianbiao Bu; Huashan Li
The binary-flashing cycle (BFC) is supposed to be a promising technology for geothermal recovery due to the full use of geofluid. For further performance improvement, the potential of using mixtures of a hydrocarbon and a retardant in the BFC system is investigated. R245fa is selected as a retardant and blended with R600 to form zeotropic mixtures. With the thermal efficiency (ηth), exergy efficiency
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Analyzing the influence of correlation length in permeability on convective systems in heterogeneous aquifers using entropy production Geotherm. Energy (IF 2.204) Pub Date : 2019-11-21 Jan Niederau; J. Florian Wellmann; Nele Börsing
Hydrothermal convection in porous geothermal reservoir systems can be seen as a double-edged sword. On the one hand, regions of upflow in convective systems can increase the geothermal energy potential of the reservoir; on the other hand, convection introduces uncertainty, because it can be difficult to locate these regions of upflow. Several predictive criteria, such as the Rayleigh number, exist
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Detailed descriptions of the lower-middle Triassic and Permian formations using cores and gamma-rays from the EPS-1 exploration geothermal borehole (Soultz-sous-Forêts, Upper Rhine Graben, France) Geotherm. Energy (IF 2.204) Pub Date : 2019-11-16 C. Aichholzer; Ph. Duringer; A. Genter
In the 1950s, a petroleum well in Soultz-sous-Forêts (no 4589; Upper Rhine Graben, France) reached the Lettenkohle (Triassic) at 830 m depth. During the exploration phase at Soultz-sous-Forêts, the first enhanced geothermal system pilot project in the world, the well was core-deepened up to 2227 m into the granitic basement (then renamed EPS-1). The objectives of this deeper well were (i) to explore
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On the geothermal potential of crustal fault zones: a case study from the Pontgibaud area (French Massif Central, France) Geotherm. Energy (IF 2.204) Pub Date : 2019-11-09 Hugo Duwiquet; Laurent Arbaret; Laurent Guillou-Frottier; Michael J. Heap; Mathieu Bellanger
The present study aims to understand the potential of a new and novel type of geothermal play system for high temperature and electricity production: crustal fault zones (CFZ). According to geological and geophysical data, the Pontgibaud fault zone (French Massif Central) is suspected to host an active hydrothermal system at a depth of a few kilometers. The deep geometry of the fault zone and the permeability
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Temperature log simulations in high-enthalpy boreholes Geotherm. Energy (IF 2.204) Pub Date : 2019-11-07 Jia Wang; Fabian Nitschke; Maziar Gholami Korzani; Thomas Kohl
Temperature logs have important applications in the geothermal industry such as the estimation of the static formation temperature (SFT) and the characterization of fluid loss from a borehole. However, the temperature distribution of the wellbore relies on various factors such as wellbore flow conditions, fluid losses, well layout, heat transfer mechanics within the fluid as well as between the wellbore
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Casing failure identification of long-abandoned geothermal wells in Field Dieng, Indonesia Geotherm. Energy (IF 2.204) Pub Date : 2019-10-16 B. T. H. Marbun; R. H. Ridwan; S. Z. Sinaga; B. Pande; B. A. Purbantanu
Integrity issues create challenges for maintaining the production of mature geothermal wells. Such problems are likely to occur in wells designed according to oil and gas standards, without considering the extreme geothermal environment. PT Geo Dipa Energi as the operator of the Dieng geothermal field, one of the longest operated in Indonesia, has experienced this difficulty since acquiring the field
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Making use of geothermal brine in Indonesia: binary demonstration power plant Lahendong/Pangolombian Geotherm. Energy (IF 2.204) Pub Date : 2019-10-12 Stephanie Frick; Stefan Kranz; Gina Kupfermann; Ali Saadat; Ernst Huenges
This paper describes a novel concept for integrating binary plants at a geothermal site which has been realized within a demonstration project in Indonesia. By using an intermediate hot water and an intermediate cooling water cycle it is possible to integrate a fully-automated binary plant with flexible operation in an existing, predominantly manually operated geothermal field. The paper gives technical
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A probabilistic geologic model of the Krafla geothermal system constrained by gravimetric data Geotherm. Energy (IF 2.204) Pub Date : 2019-09-24 Samuel W. Scott; Cari Covell; Egill Júlíusson; Águst Valfells; Juliet Newson; Birgir Hrafnkelsson; Halldór Pálsson; María Gudjónsdóttir
The quantitative connections between subsurface geologic structure and measured geophysical data allow 3D geologic models to be tested against measurements and geophysical anomalies to be interpreted in terms of geologic structure. Using a Bayesian framework, geophysical inversions are constrained by prior information in the form of a reference geologic model and probability density functions (pdfs)
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Numerical modeling of the geothermal hydrology of the Volcanic Island of Basse-Terre, Guadeloupe Geotherm. Energy (IF 2.204) Pub Date : 2019-09-17 Margaux Raguenel; Thomas Driesner; François Bonneau
This study investigates the thermo-hydraulic implications of three geologic scenarios for characterizing the geothermal hydrology of Basse-Terre Island, Guadeloupe. Despite newly acquired magnetotelluric, petrophysical, and geologic data, flow patterns and heat sources have remained elusive. Our simulations were performed in 2D, on a cross section going from La Soufrière volcano in the south to the
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Petrophysical properties of the Muschelkalk from the Soultz-sous-Forêts geothermal site (France), an important lithostratigraphic unit for geothermal exploitation in the Upper Rhine Graben Geotherm. Energy (IF 2.204) Pub Date : 2019-09-17 Michael J. Heap; Alexandra R. L. Kushnir; H. Albert Gilg; Marie E. S. Violay; Pauline Harlé; Patrick Baud
The Muschelkalk, composed of Triassic limestones, marls, dolomites, and evaporites, forms part of the Permo-Triassic cover of sedimentary rocks that directly overlies the fractured granitic reservoir used for geothermal energy exploitation in the Upper Rhine Graben. Petrophysical data for this lithostratigraphic unit are sparse, but are of value for reservoir prospection, stimulation, and optimisation
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Evaluation of the geothermal potential of the western Snake River Plain based on a deep corehole on the Mountain Home AFB near Mountain Home, Idaho Geotherm. Energy (IF 2.204) Pub Date : 2019-09-03 Thomas E. Lachmar; Thomas G. Freeman; James A. Kessler; Joseph F. Batir; James P. Evans; Dennis L. Nielson; John W. Shervais; Xiwei Chen; Douglas R. Schmitt; David D. Blackwell
A geothermal exploration corehole was drilled to a total depth of 1821.5 m on the Mountain Home Air Force Base near Mountain Home, Idaho. The corehole was used to collect an unusually large amount of data, including uniaxial compressive stress (UCS) experiments on core samples, to evaluate the geothermal potential of the western Snake River Plain. In addition, unlike many exploration holes in this
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Hydraulic behavior of fault zones in pump tests of geothermal wells: a parametric analysis using numerical simulations for the Upper Jurassic aquifer of the North Alpine Foreland Basin Geotherm. Energy (IF 2.204) Pub Date : 2019-08-24 Florian Konrad; Alexandros Savvatis; Florian Wellmann; Kai Zosseder
Fault zones in the Upper Jurassic aquifer of the North Alpine Foreland Basin are generally regions with possibly increased hydraulic properties. They are consequently often part of the geothermal exploration concepts in this area and a primary target for the drilling operation. Data from this aquifer, gathered in pump tests, however, show that only four out of 41 successful wells exhibit hydraulic
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A fracture flow permeability and stress dependency simulation applied to multi-reservoirs, multi-production scenarios analysis Geotherm. Energy (IF 2.204) Pub Date : 2019-08-23 Baptiste Lepillier; Alexandros Daniilidis; Nima Doonechaly Gholizadeh; Pierre-Olivier Bruna; Juliane Kummerow; David Bruhn
The use of the subsurface and the exploitation of subsurface resources require prior knowledge of fluid flow through fracture networks. For nuclear waste disposal, for the enhancement of hydrocarbon recovery from a field, or the development of an enhanced geothermal system (EGS), it is fundamental to constrain the fractures and the fracture network. This study is part of the GEMex project, an international
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Kinetics of silica precipitation in geothermal brine with seeds addition: minimizing silica scaling in a cold re-injection system Geotherm. Energy (IF 2.204) Pub Date : 2019-08-20 Felix Arie Setiawan; Edia Rahayuningsih; Himawan Tri Bayu Murti Petrus; Muhammad Istiawan Nurpratama; Indra Perdana
The utilization of geothermal energy remains underdeveloped, mainly due to the technical problem of silica scaling. The scaling can eventually disrupt the electricity production process due to frequent pipe maintenance. Although inevitable, scaling can be controlled by accelerating the precipitation process through the addition of silica seeds. Silica gel has an affinity to bind with dissolved silica
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Thermally driven fracture aperture variation in naturally fractured granites Geotherm. Energy (IF 2.204) Pub Date : 2019-08-20 Marina Grimm Lima; Daniel Vogler; Lorenzo Querci; Claudio Madonna; Bodo Hattendorf; Martin O. Saar; Xiang-Zhao Kong
Temperature variations often trigger coupled thermal, hydrological, mechanical, and chemical (THMC) processes that can significantly alter the permeability/impedance of fracture-dominated deep geological reservoirs. It is thus necessary to quantitatively explore the associated phenomena during fracture opening and closure as a result of temperature change. In this work, we report near-field experimental
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The development study of Karaha–Talaga Bodas geothermal field using numerical simulation Geotherm. Energy (IF 2.204) Pub Date : 2019-08-07 Sutopo; Welly Prabata; Heru Berian Pratama
A numerical simulation study of the Karaha–Talaga Bodas geothermal field was carried out to assess the resource and to analyze and predict reservoir behavior under various development scenarios. The three-dimensional natural state model of the Karaha–Talaga Bodas field has been validated with the pressure and temperature of seven wells and the conceptual model of the field. This study explores the
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Publisher Correction to: Geothermal Energy, volume 7 Geotherm. Energy (IF 2.204) Pub Date : 2019-08-03
An error occurred during the publication of a number of articles in Geothermal Energy. Several articles were published in volume 7 with a duplicate citation number.
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A machine learning approach for mapping the very shallow theoretical geothermal potential Geotherm. Energy (IF 2.204) Pub Date : 2019-07-25 Dan Assouline; Nahid Mohajeri; Agust Gudmundsson; Jean-Louis Scartezzini
The very shallow geothermal potential (vSGP) is increasingly recognized as a viable resource for providing clean thermal energy in urban and rural areas. This is primarily due to its reliability, low-cost installation, easy maintenance, and little constraints regarding ground-related laws and policies. We propose a methodology to extract the theoretical vSGP (installed in the uppermost 10 m of the
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An assessment of technical and economic feasibility to install geothermal well systems across Ukraine Geotherm. Energy (IF 2.204) Pub Date : 2019-07-03 Dmytro Rudakov; Oleksandr Inkin
Although the resources of geothermal energy in Ukraine greatly exceed domestic conventional energy sources, using geothermal heat in the country is still far behind the existing opportunities. Addressing this gap requires a large-scale pre-feasibility assessment with proper account for hydrogeological and economic factors to facilitate identifying the most promising areas of the country for efficient
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Numerical investigation on the performance, sustainability, and efficiency of the deep borehole heat exchanger system for building heating Geotherm. Energy (IF 2.204) Pub Date : 2019-07-03 Chaofan Chen; Haibing Shao; Dmitri Naumov; Yanlong Kong; Kun Tu; Olaf Kolditz
In densely inhabited urban areas, deep borehole heat exchangers (DBHE) have been proposed to be integrated with the heat pump in order to utilize geothermal energy for building heating purposes. In this work, a comprehensive numerical model was constructed with the OpenGeoSys (OGS) software applying the dual-continuum approach. The model was verified against analytical solution, as well as by comparing
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Curie point depth, thermal gradient, and heat flow in the Colombian Caribbean (northwestern South America) Geotherm. Energy (IF 2.204) Pub Date : 2019-05-29 Wilson Quintero; Oscar Campos-Enríquez; Orlando Hernández
Geothermal gradients were estimated at the points of a grid with cell size of 50 km by 50 km in northwestern Colombia. Depths to the bottom of magnetic sources were assumed to represent Curie depths, and were estimated by means of statistical-spectral analysis of aeromagnetic data contained in square windows of 100 km by 100 km, 200 km by 200 km, and 300 km by 300 km. The centroid method and a variation
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3-D seismic exploration across the deep geothermal research platform Groß Schönebeck north of Berlin/Germany Geotherm. Energy (IF 2.204) Pub Date : 2019-05-25 Charlotte M. Krawczyk; Manfred Stiller; Klaus Bauer; Ben Norden; Jan Henninges; Alexandra Ivanova; Ernst Huenges
The North German Basin is one of the three major type localities in Germany for deep geothermal energy. Here, the pore space is the dominant parameter, in contrast to fractures (Rhine Graben) and karst (Molasse Basin). To further develop the geothermal research platform Groß Schönebeck located in the Northeast German Basin, a subset of the North German Basin, we investigated the geological structure
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