{"title":"Geo-temperature response to reinjection in sandstone geothermal reservoirs","authors":"Jialong Li, Fengxin Kang, Tong Bai, Zhenhan Li, Qiang Zhao, Pingping Zhang, Tingting Zheng, Haibo Sui","doi":"10.1186/s40517-023-00277-z","DOIUrl":"10.1186/s40517-023-00277-z","url":null,"abstract":"<div><p>To study the evolution rules and behaviors of heat transport in a sandstone geothermal reservoir caused by cooled water reinjection, this research focuses on the quantitative relationship among reinjection parameters and the thermal breakthrough time of production wells. The permeation, tracer, and reinjection tests were conducted in a simulation model using a large sand tank in conjunction with the numerical simulation method based on COMSOL Multiphysics. Subsequently, sensitivity analysis and nonlinear fitting were performed to investigate the effects of fluid viscosity and density on the reinjection process, and to analyze the impact of reinjection parameters on the thermal breakthrough time of production wells, along with their underlying mechanisms and law. The results indicate that the migration velocity of reinjection water is greater in coarse sand layer compared to that in medium sand layer, and the thermal breakthrough time <i>t</i> is linearly correlated with reinjection rate (<i>Q</i>) raised to the power of − 0.85, temperature difference (<i>ΔT</i>) raised to the power of − 0.21, and spacing between the production and reinjection wells (<i>R</i>) raised to the power of 1.4. The correlation equation and analysis show that when the temperature difference between production and reinjection <i>ΔT</i> is more than 30 ℃, the influence of <i>ΔT</i> on the thermal breakthrough time of production well becomes weak, because <i>ΔT</i> exerts an effect on the thermal breakthrough time of production well <i>t</i> by influencing the relative position of the 18.5 ℃ isotherm in the temperature transition region. The error in reinjecting high-temperature fluid into low-temperature fluid may be corrected by introducing a viscosity correction coefficient <i>α</i><sub>μ</sub>.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00277-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138559050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-12-02DOI: 10.1186/s40517-023-00275-1
Ingrid Stober, Martin Jägle, Thomas Kohl
{"title":"Optimizing scenarios of a deep geothermal aquifer storage in the southern Upper Rhine Graben","authors":"Ingrid Stober, Martin Jägle, Thomas Kohl","doi":"10.1186/s40517-023-00275-1","DOIUrl":"10.1186/s40517-023-00275-1","url":null,"abstract":"<div><p>Based on a newly developed geological 3D reservoir model for the demonstration site of the ‘Freiburger Bucht’ in the Upper Rhine Graben (SW Germany), geothermal development and realization concepts of an aquifer thermal energy storage (ATES) in the Buntsandstein aquifer were elaborated and energetically evaluated by numerical modeling. The thermal–hydraulic coupled modeling was performed with the FE-software OpenGeoSys and COMSOL. For this purpose, the geological model was converted into a numerical model and calibrated by local and regional, hydrogeological and geothermal measured values. A detailed study based on two-phase storage-heating cycles per year with constant injection temperature on the ‘hot side’ of the ATES, different volumetric flow rates, and temperature spreads was performed to quantify possible storage capacities, energies, and efficiencies. The calculated efficiency of the cyclic storage operation in this study, averaged over 10 storage heating cycles, are between 50 and 85%, depending on flow rate and temperature spread. The efficiency of the individual storage heating cycles increases from year to year in all scenarios considered, as the ‘hot side’ of the storage heats up in the long term. To increase ATES’ efficiency, also horizontal wells were integrated into the numerical model and the results were compared with those of inclined wells.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00275-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138475585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-11-21DOI: 10.1186/s40517-023-00276-0
Pascal Schlagermann, Kurt M. Reinicke
{"title":"Modeling and economic evaluation of deep geothermal heat supply systems using the example of the Wealden near Hannover, Germany","authors":"Pascal Schlagermann, Kurt M. Reinicke","doi":"10.1186/s40517-023-00276-0","DOIUrl":"10.1186/s40517-023-00276-0","url":null,"abstract":"<div><p>Germany desires to become climate-neutral in its heat supply by 2045. From 2024 onward communities are legally required to develop a plan documenting how the objective will be achieved. Geothermal resources can be a major building block to reach the aspirational target if they can be developed at competitive costs. To evaluate the economic potential of geothermal resources is time and money consuming. Questions which need to be addressed in the context of such evaluations are: how can an economic recovery of geothermal heat be achieved, how can subsurface risks associated with an exploration be managed, and how competitive is a deep geothermal energy recovery compared to other options of heat supply? These questions are key to a development of deep geothermal heat, especially if the geothermal conditions are not as prominent as in already realized projects, but less favorable as in the deep clastic sediments of the North German Basin. With this contribution a procedure is presented and used to determine net present values and the associated levelized costs for deep hydrothermal heat recovery systems. It consists of modelling the geothermal cycle, sizing all necessary components, costing them, and calculating net present value and levelized cost. The thermal model is verified by comparing the modelled state variables pressure and temperature at relevant state points of the thermal cycle with actual data of a geothermal project. The cost model is validated with biding results and cost information from actual projects and modified as appropriate. In applying the model to a setting in the Hannover–Celle area with temperatures of around 70 °C, conditions are determined, which lead to positive net present values. The degree of their influence is determined in sensitivity analyses allowing a systemic optimization. The results show that for a coupled heat plant with geothermal heat supplied at baseload conditions, levelized costs of approx. 8 cents/kWh are achievable. The presented thermodynamic and cost models are considered helpful instruments for developing preliminary conceptual estimates, strategies for optimization, and portfolio management.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00276-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138431472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-11-13DOI: 10.1186/s40517-023-00271-5
Alexandra R. L. Kushnir, Michael J. Heap, Patrick Baud, Thierry Reuschlé, Jean Schmittbuhl
{"title":"Reactivation of variably sealed joints and permeability enhancement in geothermal reservoir rocks","authors":"Alexandra R. L. Kushnir, Michael J. Heap, Patrick Baud, Thierry Reuschlé, Jean Schmittbuhl","doi":"10.1186/s40517-023-00271-5","DOIUrl":"10.1186/s40517-023-00271-5","url":null,"abstract":"<div><p>Hydraulic stimulation of enhanced deep geothermal reservoirs commonly targets pre-existing joint networks with the goal of increasing reservoir permeability. Here, we study the permeability and strength of joint-free and jointed Buntsandstein sandstones from the EPS-1 exploratory borehole at the Soultz-sous-Forêts geothermal site (France). The studied jointed samples contain naturally formed fractures that are variably filled with secondary mineralisation. We find that the permeability of these rocks is more sensitive to the presence and orientation of bedding than to the presence of joints at the scale of the samples: permeability is lowest in samples where bedding is oriented perpendicular to the direction of fluid flow. While well-sealed joints can act as barriers to fluid flow, partially filled joints neither inhibit nor promote fluid flow with respect to their joint-free counterparts. These samples were then deformed under triaxial conditions to assess (1) whether deformation reactivates pre-existing joints, and (2) how permeability changes as a result of deformation. We find that the mechanical response of the rocks depends on the extent to which joints are sealed. Well-sealed joints locally increase rock strength and experimentally induced fractures do not exploit pre-existing joint surfaces; partially sealed joints, by contrast, act as planes of weakness that localise strain. Although the permeability of all samples increased during deformation, permeability increase was largest in samples with poorly filled joints. We conclude that hydraulic stimulation operations must carefully consider the extent to which targeted joint networks are filled. Partially sealed joints are ideal targets for stimulation: these features act as planes of weakness within the rock mass and their reactivation can result in significant increases in permeability. By contrast, well-sealed joints may increase rock strength locally and may never reactivate during stimulation, making them poor targets for permeability enhancement.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00271-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on permeability evolution and damage mechanism along the EGS fracture in heat mining stage under thermal stress/cracking","authors":"Wei Zhang, Dong Wang, Zenglin Wang, Tiankui Guo, Chunguang Wang, Jiayuan He, Le Zhang, Peng Zheng, Zhanqing Qu","doi":"10.1186/s40517-023-00274-2","DOIUrl":"10.1186/s40517-023-00274-2","url":null,"abstract":"<div><p>As main heat exchange channel in enhanced geothermal system, the evolution of hydraulic conductivity in fracture is significance for efficient heat mining. For the thermal stress or thermal cracking spontaneously induced by the temperature difference between low-temperature fluid and hot rock in heat mining stage, it is necessary to explore the damage mechanism along EGS fracture and the corresponding permeability evolution. Firstly, the long-term permeability tests under high temperature (50–200 ℃) were conducted by the self-developed high temperature seepage experimental device. Then, a coupled THM-D model was constructed to describe the damage distribution along fracture. Combined with experimental and simulation results, relationship between the thermal stress/cracking and the evolution of fracture permeability is revealed. The results indicate that during high-temperature (200 ℃) experiments, the fracture permeability first increases rapidly under the low-temperature induced thermal stress/cracking, then decreases due to the blockage effect induced by the debris particles generated in thermal cracking along fracture. The enhancement of injection velocity and heterogeneity are all conducive to the emergence of thermal cracking in matrix along fracture. Simultaneously, high confining pressure has a negative effect on the migration of debris particles of thermal cracking, which contribute to prevent the blockage of debris particles.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00274-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134878275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-10-31DOI: 10.1186/s40517-023-00272-4
Jérôme Azzola, Katja Thiemann, Emmanuel Gaucher
{"title":"Integration of distributed acoustic sensing for real-time seismic monitoring of a geothermal field","authors":"Jérôme Azzola, Katja Thiemann, Emmanuel Gaucher","doi":"10.1186/s40517-023-00272-4","DOIUrl":"10.1186/s40517-023-00272-4","url":null,"abstract":"<div><p>To accelerate the energy transition, the exploitation of deep geothermal reservoirs is becoming a priority to supply district heating networks in areas with high potential for geothermal applications. However, the sustainable development of the resource exploitation implies minimizing the associated risks, in particular related to induced seismicity, while optimizing operational processes. Besides, the growth of this energy sector, often supported by financial aid programs, provides resources to the industry that were not available in the past to implement advanced monitoring strategies. In this context, we present a monitoring system establishing Distributed Acoustic Sensing (DAS) as an effective component of the seismic network used for the monitoring of the geothermal field of Schäftlarnstraße (Munich, Germany). We also investigate its potential for real-time seismic monitoring in an urban environment and for risk mitigation. The monitoring system is based on a data management system linking the on-site acquisition infrastructure, including the fiber optic cable deployed in an injection well and the associated DAS interrogator, to a cloud Internet-of-Things (IoT) platform. The latter is designed to deliver both a secure storage environment for the DAS recordings and optimized computing resources for their processing. The proposed solution has been tested over a six-month period under operating conditions of the geothermal field. The survey proves the feasibility of efficiently acquiring and processing the large flow of continuous DAS data. The processing outcomes, emphasized by two detected local seismic events, demonstrate the suitability of DAS, cemented behind the casing of a flowing well, for (micro-) seismic monitoring of the geothermal site. The processing applied to the data takes advantage of the high spatial density of the acquisitions for their de-noising and for the detection of events. We find that the DAS monitoring system is capable of successfully detecting an event that could not be detected by the standard surface or shallow-borehole 3C-seismometers, despite noisy conditions associated with the urban environment and the field operation. The six-month test period demonstrates the potential of DAS to be integrated as a routine seismic monitoring component of an operating geothermal field. In addition, it highlights its advantageous role as a complement to surface seismometer-based networks, particularly in urban environments.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00272-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-10-27DOI: 10.1186/s40517-023-00273-3
Muhammad Anees, Jonas Kley, Bernd Leiss, David Hindle, Ali Abbas Wajid, Bianca Wagner, Mumtaz M. Shah, Elco Luijendijk
{"title":"Application of in-situ gamma spectrometry for radiogenic heat production estimation in the Western Himalaya, Kohistan, and Karakoram in northern Pakistan","authors":"Muhammad Anees, Jonas Kley, Bernd Leiss, David Hindle, Ali Abbas Wajid, Bianca Wagner, Mumtaz M. Shah, Elco Luijendijk","doi":"10.1186/s40517-023-00273-3","DOIUrl":"10.1186/s40517-023-00273-3","url":null,"abstract":"<div><p>The Himalaya, Kohistan, and Karakoram ranges comprise Proterozoic to Cenozoic crystalline complexes exposed in northern Pakistan. Numerous hot springs in the area indicate high subsurface temperatures, prompting a need to evaluate the local contribution of radiogenic heat to the general orogenic-related elevated geothermal gradients. The current study employed a portable gamma spectrometer to estimate the in-situ radiogenic heat production in the Nanga Parbat Massif, Kohistan–Ladakh batholith, and the Karakoram batholith. Heat production in the Nanga Parbat Massif is high, with a range from 0.2 to 10.8 µWm<sup>−3</sup> and mean values of 4.6 ± 2.5 and 5.9 ± 1.9 µWm<sup>−3</sup> for gneisses and granites, respectively. By contrast, the heat production is low in the Kohistan–Ladakh batholith, ranging from 0.1 to 3.1 µWm<sup>−3</sup>, with the highest mean of 2.0 ± 0.5 µWm<sup>−3</sup> in granites. The Karakoram batholith shows a large variation in heat production, with values ranging from 0.4 to 20.3 µWm<sup>−3</sup> and the highest mean of 8.4 ± 8.3 µWm<sup>−3</sup> in granites. The in-situ radiogenic heat production values vary in different ranges and represent considerably higher values than those previously used for the thermal modeling of Himalaya. A conductive 1D thermal model suggests 93–108 °C hotter geotherms, respectively, at 10 and 20 km depths due to the thick heat-producing layer in the upper crust, resulting in a surface heat flow of 103 mWm<sup>−2</sup>. The present study provides first-order radiogenic heat production constraints for developing a thermal model for geothermal assessment.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00273-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-10-20DOI: 10.1186/s40517-023-00269-z
Danaé Bregnard, Alessio Leins, Guillaume Cailleau, Andrea Vieth-Hillebrand, Florian Eichinger, Joy Ianotta, Richard Hoffmann, Joerg Uhde, Saskia Bindschedler, Simona Regenspurg, Pilar Junier
{"title":"Unveiling microbial diversity in deep geothermal fluids, from current knowledge and analogous environments","authors":"Danaé Bregnard, Alessio Leins, Guillaume Cailleau, Andrea Vieth-Hillebrand, Florian Eichinger, Joy Ianotta, Richard Hoffmann, Joerg Uhde, Saskia Bindschedler, Simona Regenspurg, Pilar Junier","doi":"10.1186/s40517-023-00269-z","DOIUrl":"10.1186/s40517-023-00269-z","url":null,"abstract":"<div><p>Extreme environments on Earth host a large diversity of microbial life. Bacteria, archaea, and fungi are able to survive under one or several extreme conditions including extreme ranges of temperature, pressure, pH or salinity. Despite extensive research on extremophilic microorganisms, a relatively unexplored frontier within the study of the deep biosphere is the survey of the diversity of microorganisms inhabiting deep geothermal reservoirs used for energy production. These sites offer unique access to investigate life in the deep biosphere. The conditions in these reservoirs are often within the range of the known limits of life, which makes them a suitable habitat for various extremophilic microorganisms. Moreover, microbial-driven processes such as microbially induced scaling or corrosion can decrease the efficacy of geothermal power plant systems. The present review summarizes the current knowledge and uncertainties surrounding microbial life in deep geothermal reservoirs. As the knowledge in deep geothermal fluids is still scarce, the microbial diversity in analogous environments, such as surface geothermal springs, deep-sea hydrothermal vents or deep subsurface environments, is also summarized here. The high diversity of microorganisms inhabiting these analogous environments suggests that deep geothermal fluids may host an unsuspected microbial diversity. Moreover, the challenges associated to the study of microorganisms in geothermal fluids are reviewed. These include notably challenges linked to sampling, DNA extraction from low biomass samples, DNA amplification and sequencing of unknown communities, and biases induced by comparison of the sequences obtained to reference databases. Such biases are even stronger concerning fungi and archaea, as specific databases are less extensive than those for bacteria. A broader knowledge on microorganisms in deep geothermal fluids may not only allow to reduce the negative impact of microbial activity in geothermal power plants, but could also provide new insights into the evolution of microorganisms and their survival in extreme environments.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00269-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-09-29DOI: 10.1186/s40517-023-00270-6
Ingrid Stober, Jens Grimmer, Michael Kraml
{"title":"The Muschelkalk aquifer of the Molasse basin in SW-Germany: implications on the origin and development of highly saline lithium-rich brines in calcareous hydrothermal reservoirs","authors":"Ingrid Stober, Jens Grimmer, Michael Kraml","doi":"10.1186/s40517-023-00270-6","DOIUrl":"10.1186/s40517-023-00270-6","url":null,"abstract":"<div><p>Highly saline lithium-rich hydrothermal fluids (measured chloride concentration up to 44 g kg<sup>−1</sup>, lithium concentration up to 162 mg kg<sup>−1</sup>) occur in the deep calcareous Muschelkalk aquifer beneath the northern Alpine foreland (Molasse) basin. We have combined geologic, hydraulic, hydrochemical, and stress field data of the Triassic Muschelkalk aquifer beneath younger sediments of Triassic–Jurassic successions and the Cenozoic Molasse basin of SW-Germany for a synthesis to constrain the origin and development of these brines. In contrast to the regional southeast plunge of Jurassic and Cenozoic strata, low-gradient groundwater flow in the Upper Muschelkalk aquifer is to the north, induced by regional recharge from west, south, and east. The investigated area is seismically active and north trending maximum horizontal stress likely fosters development of necessary fracture permeability for northward flow in the competent carbonates of the Upper Muschelkalk aquifer. The highest lithium concentrations and total dissolved solids (TDS) can be found in the southern parts of the Muschelkalk aquifer. Here, the Muschelkalk Group overlays directly a crystalline basement swell separating two ENE-trending Permocarboniferous troughs. We argue that the highly saline lithium-rich fluids originate from fluid–rock interaction of meteoric water with Variscan crystalline basement rocks and entered the Muschelkalk aquifer on top of the basement swell by permeable faults and fractures. The marginal calcareous sand-rich facies of the Muschelkalk enables the inflow of brines from crystalline basement faults and fractures into the aquifer. We thus argue for an external origin of these brines into the aquifer and further intra-reservoir development by dilution with meteoric water.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00270-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Geothermal EnergyPub Date : 2023-08-30DOI: 10.1186/s40517-023-00268-0
J. Vidal, P. Patrier, D. Beaufort, S. Maza, G. Rivera, G. Volpi, D. Morata
{"title":"Correction: Structural control of the graben fault on hydrothermal alteration in the Cerro Pabellón geothermal system (Andean Cordillera, Northern Chile)","authors":"J. Vidal, P. Patrier, D. Beaufort, S. Maza, G. Rivera, G. Volpi, D. Morata","doi":"10.1186/s40517-023-00268-0","DOIUrl":"10.1186/s40517-023-00268-0","url":null,"abstract":"","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":"11 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-023-00268-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45070520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}