Relevant bibliographies by topics / Enhanced geothermal systems

Academic literature on the topic 'Enhanced geothermal systems'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Enhanced geothermal systems"

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Sircar, Anirbid, Krishna Solanki, Namrata Bist, and Kriti Yadav. "Enhanced Geothermal Systems – Promises and Challenges." International Journal of Renewable Energy Development 11, no. 2 (December 1, 2021): 333–46. http://dx.doi.org/10.14710/ijred.2022.42545.

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Geothermal energy plays a very important role in the energy basket of the world. However, understanding the geothermal hotspots and exploiting the same from deep reservoirs, by using advanced drilling technologies, is a key challenge. This study focuses on reservoirs at a depth greater than 3 km and temperatures more than 150°C. These resources are qualified as Enhanced Geothermal System (EGS). Artificially induced technologies are employed to enhance the reservoir permeability and fluid saturation. The present study concentrates on EGS resources, their types, technologies employed to extract energy and their applications in improving power generation. Studies on fracture stimulation using hydraulic fracturing and hydro shearing are also evaluated. The associated micro-seismic events and control measures for the same are discussed in this study. Various simulators for reservoir characterization and description are also analyzed and presented. Controlled fluid injection and super critical CO2 as heat transmission fluid are described for the benefit of the readers. The advantages of using CO2 over water and its role in reducing the carbon footprint are brought out in this paper for further studies.
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Olasolo, P., M. C. Juárez, M. P. Morales, Sebastiano D´Amico, and I. A. Liarte. "Enhanced geothermal systems (EGS): A review." Renewable and Sustainable Energy Reviews 56 (April 2016): 133–44. http://dx.doi.org/10.1016/j.rser.2015.11.031.

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Wood, Warren W. "Enhanced Geothermal Systems: An Opportunity for Hydrogeology." Ground Water 47, no. 6 (November 2009): 751. http://dx.doi.org/10.1111/j.1745-6584.2009.00573.x.

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Majer, Ernest L., Roy Baria, Mitch Stark, Stephen Oates, Julian Bommer, Bill Smith, and Hiroshi Asanuma. "Induced seismicity associated with Enhanced Geothermal Systems." Geothermics 36, no. 3 (June 2007): 185–222. http://dx.doi.org/10.1016/j.geothermics.2007.03.003.

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Lee, Junbeum, and Eunhyea Chung. "Geochemical Effect of Geothermal Water Flushing during Enhanced Geothermal Systems Operation." Journal of the Korean Society of Mineral and Energy Resources Engineers 58, no. 3 (June 1, 2021): 205–14. http://dx.doi.org/10.32390/ksmer.2021.58.3.205.

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Feng, Chao Yin. "Enhanced Geothermal Systems Projects and its Potential for Carbon Storage." Advanced Materials Research 732-733 (August 2013): 109–15. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.109.

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Enhanced Geothermal Systems represent a series of technology, which use engineering methods to improve the performance of geothermal power plant. In some geothermal fields, the rocks are in high temperature but a low permeability, or the subsurface water is scarce. In these geological conditions, cool water was injected into the geothermal wells to fracture the tight rock and create man-made reservoir for thermal exploitation. Furthermore, these engineering methods can be utilized to improve the productivity of pre-existing hydrothermal power plants. To save water and treat the global warming, using carbon dioxide instead of water as working fluid was proposed. Numerical simulation reveals that the carbon dioxide has numerous advantages over water as working fluid in the heat mining process. The precipitation caused by carbon dioxide will restore part of carbon dioxide in the rock and reduce the micro-seismicity risk.
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Raos, Ilak, Rajšl, Bilić, and Trullenque. "Multiple-Criteria Decision-Making for Assessing the Enhanced Geothermal Systems." Energies 12, no. 9 (April 26, 2019): 1597. http://dx.doi.org/10.3390/en12091597.

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This paper presents the main features of a multiple-criteria decision-making tool for economic and environmental assessment of enhanced geothermal systems projects. The presented holistic approach takes into account important influencing factors such as technical specifications, geological characteristics, spatial data, energy and heat prices, and social and environmental impact. The multiple-criteria decision-making approach uses a weighted decision matrix for evaluating different enhanced geothermal systems alternatives based on a set of criterions which are defined and presented in this paper. The paper, defines and quantifies new criterions for assessing enhanced geothermal systems for a particular site. For evaluation of the relative importance of each criterion in decision making, the weight is associated with each of the listed criterions. The different scenarios of end-use applications are tested in the case study. Finally, in the case study, the data and statistics are collected from real geothermal plants. The case study provides results for several scenarios and the sensitivity analysis based on which the approach is validated. The proposed method is expected to be of great interest to investors and decision makers as it enables better risk mitigation.
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Messervey, Thomas, Marco Calderoni, Angel Font, Mikel Borras, Ray Sterling, David Martin, and Zia Lennard. "Introducing GEOFIT: Cost-Effective Enhanced Geothermal Systems for Energy Efficient Building Retrofitting." Proceedings 2, no. 15 (September 21, 2018): 557. http://dx.doi.org/10.3390/proceedings2150557.

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GEOFIT, “Deployment of novel GEOthermal systems, technologies and tools for energy efficient building retrofitting,” is a recently launched 4-year H2020 project funded by the Innovation and Networks Executive Agency (INEA) under the call topic LCE-17-2017: Easier to install and more efficient geothermal systems for retrofitting buildings. GEOFIT is a part of INEA’s Energy Portfolio Low Carbon Economy (LCE), Renewable Energy Technologies (RET) and brings together 24 partners from 10 European countries to work on the development of novel and smart shallow geothermal systems. This paper introduces the project.
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Fairley, J. P., S. E. Ingebritsen, and R. K. Podgorney. "Challenges for Numerical Modeling of Enhanced Geothermal Systems." Ground Water 48, no. 4 (December 15, 2009): 482–83. http://dx.doi.org/10.1111/j.1745-6584.2010.00716.x.

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Karvounis, D. C., and P. Jenny. "Adaptive Hierarchical Fracture Model for Enhanced Geothermal Systems." Multiscale Modeling & Simulation 14, no. 1 (January 2016): 207–31. http://dx.doi.org/10.1137/140983987.

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Dissertations / Theses on the topic "Enhanced geothermal systems"

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De, Simone Silvia. "Induced seismicity in enhanced geothermal systems : assessment of thermo-hydro-mechanical effects." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/405890.

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Micro-seismicity, and especially felt seismicity, induced by Enhanced Geothermal Systems (EGS) operations is a matter of scientific interest, not only because of the related risks and concerns, but also because the correspondence between injection and seismic activity still remains unclear. The Thesis aims to deepen the understanding of the involved Thermo-Hydro-Mechanical (THM) processes, in order to explain and manage co- and post-injection seismicity. First, we investigate the HM coupling and its effects on pressure response. Fluids injection exerts a force over the aquifer that causes deformation. This implies that Specific Storage, which reflects the capacity of permeable media to deform, cannot be treated as a single parameter, like in classical groundwater hydrology, because deformation also depends on aquifer geometry and on surrounding formations, which constrain displacements. We demonstrate the non-local nature of storage (i.e., its dependence on the poroelastic response over the whole aquifer) by means of analytical solutions to the transient pressure response to injection into one-dimensional and cylindrical finite aquifers, while acknowledging HM coupling. We find that the pressure response is faster and much greater than predicted with traditional solutions. Second, we consider non-isothermal injection and compare the effects of HM and TM couplings. We present analytical expressions for long-term hydraulic and thermal stresses and displacements for unidirectional and radial geometries. To obtain them, we assume steady-state fluid flow and develop an easy-to-use solution to the transient heat transport problem. The solution is then used to illustrate the poroelastic and thermoelastic response and, in particular, the sensitivity of stresses to the outer mechanical boundary conditions. Third, we perform coupled HM and THM simulations of cold water injection in a fault-intact rock system, which allows us to analyze mechanical stability changes during injection in the vicinity of the well. Simulation results show that temperature drop induces a significant perturbation of stresses in the intact rock near the injection well. This perturbation is likely to induce seismicity around critically oriented fractures. HM simulations show that fracture stability depends on the orientation of the faults and on the initial stress tensor. Results show that TM effects dominate and could induce seismicity, when the largest confining stress acts perpendicular to a fracture. Finally, we investigate the mechanisms that may induce seismicity after the end of fluid injection into a deep geothermal system (post-injection seismicity). Apart from the direct impact of fluid pressure increase, we acknowledge thermal effects due to cooling and stress redistribution caused by shear slip along favorably oriented fractures during injection. The effect of these three processes are analyzed both separately and superimposed. We find that post-injection seismicity may occur on unfavorably oriented faults that were originally stable. During injection, such faults become destabilized by thermal and shear slip stress changes, but remain static by the superposition of the stabilizing effect of pressure forces. However, these fractures become unstable and fail when the pressure forcing dissipates shortly after injection stops abruptly, which suggests that a slow reduction in injection rate may alleviate post-injection seismicity.
La micro-sismicitat induïda per operacions relacionades amb els Sistemes Geotèrmics Estimulats ha originat un gran interès científic, no només pel risc i la preocupació que comporta, sinó també perquè la relació entre la injecció de fluids i l'activitat sísmica no s'entén completament. Aquesta tesi pretén avançar en la comprensió dels processos hidro-termo-mecànics (THM) que causen aquesta sismicitat, per poder explicar-la i gestionar-la. En primer lloc, hem investigat l'acoblament hidro-mecànic (HM) i el seu efecte sobre les pressions. En Hidrologia Subterrània clàssica l'emmagatzematge especifico expressa la capacitat de l'aqüífer de deformar-se després d'una variació de pressió. Malgrat això, la sobrepressió generada per la injecció exerceix una força que deforma tot l'aqüífer, depenent de la seva geometria i de les formacions adjacents. Per això, l'emmagatzematge no es pot expressar amb un sol paràmetre, sinó que depèn de la resposta poro-elàstica de tot l'aqüífer, per la qual cosa diem que l'emmagatzematge específic és "no-local", cosa que vam mostrar mitjançant solucions analítiques de la resposta transitòria al problema HM de la injecció en aqüífers de dimensió finita, amb geometria tant unidimensional com cilíndrica. Seguidament, hem considerat una injecció no isoterma i comparat els efectes de l'acoblament hidro-mecànic (HM) i termo-mecànic (TM). Hem obtingut expressions analítiques per a les tensions i els desplaçaments induïts a llarg termini per la pertorbació hidràulica i tèrmica, en el cas de dominis unidireccional i radial. Per a això, hem considerat flux estacionari i desenvolupat una solució analítica senzilla per al transport de calor en règim transitori, la qual cosa ens ha permès calcular la resposta poro i termo-elàstica i en particular la sensibilitat de les tensions a les condicions mecàniques en el contorn exterior. A continuació, hem desenvolupat simulacions HM i THM acoblades de la injecció d'aigua freda en un sistema format per una falla embeguda en una roca intacta, a fi d'analitzar les variacions de l'estabilitat mecànica durant la injecció. Les simulacions HM mostren que l'estabilitat de les fractures depèn de la seva orientació i del tensor de tensions inicial. Concloem que la reducció de temperatura provoca prop del pou una forta pertorbació de les tensions, que pot induir sismes en fractures orientades críticament, especialment quan la tensió màxima actua perpendicularment a la fractura. Finalment, hem estudiat els mecanismes que poden induir sismes quan s'atura la injecció de fluids en sistemes geotèrmics profunds (sismicitat post-injecció). A més de l'efecte directe de l'augment de la pressió, hem considerat l'efecte tèrmic a causa del refredament i la redistribució de tensions generada pel moviment de cisalla que ocorre durant la injecció en fractures favorablement orientades. Aquests efectes s'han analitzat tant per separat com superposats. Dels resultats podem deduir que la sismicitat post-injecció pot ocórrer al llarg de fractures que eren inicialment estables i es desestabilitzen durant la injecció, a causa de les tensions tèrmiques i a les induïdes per la cisalla, però es mantenen estables gràcies a les forces de pressió. Posteriorment, aquestes fractures trenquen quan s'interromp la injecció, ja que les pressions es dissipen ràpidament. Això suggereix que la sismicitat post-injecció pot atenuar-se amb una reducció lenta del cabal d'injecció.
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Peluchette, Jason. "Optimization of Integrated Reservoir, Wellbore, and Power Plant Models for Enhanced Geothermal Systems." Thesis, West Virginia University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1524651.

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Geothermal energy has the potential to become a substantially greater contributor to the U.S. energy market. An adequate investment in Enhanced Geothermal Systems (EGS) technology will be necessary in order to realize the potential of geothermal energy. This study presents an optimization of a waterbased Enhanced Geothermal System (EGS) modeled for AltaRock Energy’s Newberry EGS Demonstration location. The optimization successfully integrates all three components of the geothermal system: (1) the present wellbore design, (2) the reservoir design, and (3) the surface plant design.

Since the Newberry EGS Demonstration will use an existing well (NWG 55-29), there is no optimization of the wellbore design, and the aim of the study for this component is to replicate the present wellbore conditions and design. An in-house wellbore model is used to accurately reflect the temperature and pressure changes that occur in the wellbore fluid and the surrounding casing, cement, and earth during injection and production. For the reservoir design, the existing conditions, such as temperature and pressure at depth and rock density, are incorporated into the model, and several design variables are investigated. The engineered reservoir is modeled using the reservoir simulator TOUGH2 while using the graphical interface PetraSim for visualization. Several fracture networks are investigated with the goal of determining which fracture network yields the greatest electrical output when optimized jointly with the surface plant. A topological optimization of the surface is completed to determine what type of power plant is best suited for this location, and a parametric optimization of the surface plant is completed to determine the optimal operating conditions.

The conditions present at the Newberry, Oregon EGS project site are the basis for this optimization. The subsurface conditions are favorable for the production of electricity from geothermal energy with rock temperatures exceeding 300°C at a well depth of 3 km. This research was completed in collaboration with AltaRock Energy, which has provided our research group with data from the Newberry well. The purpose of this thesis is to determine the optimal conditions for operating an Enhanced Geothermal System for the production of electricity at Newberry.

It was determined that a fracture network consisting of five fractured zones carrying 15 kg/s of fluid is the best reservoir design out of those investigated in this study. Also, it was found that 100 m spacing between the fractured zones should be implemented as opposed to only 50 m of spacing. A double-flash steam power plant provides the best method of utilization of the geothermal fluid. For the maximum amount of electricity generation over the 30-year operating lifetime, the cyclone separator should operate at 205°C and the flash vessel should operate at 125°C.

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Vecchiarelli, Alessandra. "Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82857.

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Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 167-171).
GEOFRAC is a three-dimensional, geology-based, geometric-mechanical, hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that it is based on statistical input representing fracture patterns in the field in form of the fracture intensity P₃₂ (fracture area per volume) and the best estimate fracture size E[A]. Recent developments in GEOFRAC allow the user to calculate the flow in a fractured medium. For this purpose the fractures are modeled as parallel plates and the flow rate can be calculated using the Poisseuille equation. This thesis explores the possibility of the application of GEOFRAC to model a geothermal reservoir. After modeling the fracture flow system of the reservoir, it is possible to obtain the production flow rate. A parametric study was conducted in order to check the sensitivity of the output of the model. An attempt to explain how aperture, width and rotation (orientation distribution) of the fractures influence the resulting flow rate in the production well is presented. GEOFRAC is a structured MATLAB code composed of more than 100 functions. A GUI was created in order to make GEOFRAC more accessible to the users. Future improvements are the keys for a powerful tool that will let GEOFRAC to be used to optimize the location of the injection and production wells in a geothermal system.
by Alessandra Vecchiarelli.
S.M.
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Lacirignola, Martino. "Life cycle assessment of enhanced geothermal systems : from specific case studies to generic parameterized models." Thesis, Paris, CNAM, 2017. http://www.theses.fr/2017CNAM1095/document.

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Cette recherche vise à étudier les impacts environnementaux d'une technologie émergente de production d’électricité basée sur une source renouvelable, les systèmes géothermiques stimulés (EGS), par l’analyse de leur cycle de vie (ACV).Après avoir analysé plusieurs études de cas, nous avons développé un modèle ACV paramétré capable de caractériser les performances environnementales de la filière EGS. Nos résultats montrent que les émissions de gaz à effet de serre des EGS sur leur cycle de vie sont bien inférieures à celles des centrales utilisant des combustibles fossiles.Dans un deuxième temps, nous avons mis au point un cadre méthodologique pour appliquer l'analyse de sensibilité globale (GSA) à l’ACV des technologies émergentes comme les EGS, prenant en compte les incertitudes élevées liées à leur caractère innovant. Nous avons appliqué notre nouvelle approche GSA pour développer un modèle ACV simplifié, à destination des décideurs, permettant une estimation rapide des impacts des EGS à partir de seulement cinq paramètres clefs: capacité installée, profondeur de forage, nombre de puits, débit géothermal et durée de vie.L'approche méthodologique développée dans cette thèse est applicable à d'autres technologies et ouvre de larges perspectives de recherche dans le domaine de l'évaluation environnementale
This thesis investigates the environmental impacts of an emerging renewable energy technology, the enhanced geothermal systems (EGS), using a life cycle assessment (LCA) approach.Following the analysis of several EGS case studies, we developed a parameterized LCA model able to provide a global overview of the life cycle impacts of the EGS technology. The greenhouse gas emissions of EGS are found comparable with other renewable energy systems and far better than those of power plants based on fossil fuels.In a second stage, we developed a methodological framework for the application of global sensitivity analysis (GSA) to the LCA of emerging technologies like the EGS, taking into account the high uncertainties related to their description. We applied our new GSA approach to generate a simplified LCA model, aimed at decision makers, allowing a rapid estimation of the life cycle impacts of EGS from only five key parameters: installed capacity, drilling depth, number of wells, flow rate and lifetime.The methodological approach developed in this thesis is applicable to other technologies and opens large research perspectives in the field of environmental assessment
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Yekoladio, Peni Junior. "Thermodynamic optimization of sustainable energy system : application to the optimal design of heat exchangers for geothermal power systems." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/31615.

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The present work addresses the thermodynamic optimization of small binary-cycle geothermal power plants. The optimization process and entropy generation minimization analysis were performed to minimize the overall exergy loss of the power plant, and the irreversibilities associated with heat transfer and fluid friction caused by the system components. The effect of the geothermal resource temperature to impact on the cycle power output was studied, and it was found that the maximum cycle power output increases exponentially with the geothermal resource temperature. In addition, an optimal turbine inlet temperature was determined, and observed to increase almost linearly with the increase in the geothermal heat source. Furthermore, a coaxial geothermal heat exchanger was modeled and sized for minimum pumping power and maximum extracted heat energy. The geofluid circulation flow rate was also optimized, subject to a nearly linear increase in geothermal gradient. In both limits of the fully turbulent and laminar fully-developed flows, a nearly identical diameter ratio of the coaxial pipes was determined irrespective of the flow regime, whereas the optimal geofluid mass flow rate increased exponentially with the Reynolds number. SeveORCs were observed to yield maximum cycle power output. The addition of an IHE and/or an Oral organic Rankine Cycles were also considered as part of the study. The basic types of the FOH improved significantly the effectiveness of the conversion of the available geothermal energy into useful work, and increased the thermal efficiency of the geothermal power plant. Therefore, the regenerative ORCs were preferred for high-grade geothermal heat. In addition, a performance analysis of several organic fluids was conducted under saturation temperature and subcritical pressure operating conditions of the turbine. Organic fluids with higher boiling point temperature, such as n-pentane, were recommended for the basic type of ORCs, whereas those with lower vapour specific heat capacity, such as butane, were more suitable for the regenerative ORCs.
Dissertation (MEng)--University of Pretoria, 2013.
Mechanical and Aeronautical Engineering
unrestricted
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Howard, Panit. "High Temperature Seismic Monitoring for Enhanced Geothermal Systems - Implementing a Control Feedback Loop to a Prototype Tool by Sandia National Laboratories." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32891.

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Geothermal energy can make an important contribution to the U.S. energy portfolio. Production areas require seismic monitoring tools to develop and monitor production capability. This paper describes modifications made to a prototypical seismic tool to implement improvements that were identified during previous tool applications. These modifications included changing the motor required for mechanical coupling the tool to a bore-hole wall. Additionally, development of a closed-loop process control utilized feedback from the contact force between the coupling arm and bore-hole wall. Employing a feedback circuit automates the tool deployment/anchoring process and reduces reliance on the operator at the surface. The tool components were tested under high temperatures and an integrated system tool test demonstrated successful tool operations.
Master of Science
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Köpke, Rike [Verfasser], T. [Akademischer Betreuer] Kohl, and J. [Akademischer Betreuer] Schmittbuhl. "Fracture network characterization in enhanced geothermal systems by induced seismicity analysis / Rike Köpke ; T. Kohl, J. Schmittbuhl." Karlsruhe : KIT-Bibliothek, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021092905002801218956.

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Koch, David [Verfasser], and Wolfgang [Akademischer Betreuer] Ehlers. "Thermomechanical modelling of non-isothermal porous materials with application to enhanced geothermal systems / David Koch ; Betreuer: Wolfgang Ehlers." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2016. http://d-nb.info/1132583152/34.

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Firoozy, Niloofar. "Assessment of geothermal application for electricity production from the prairie evaporite formation of Williston Basin in South-West Manitoba." 13th International UFZ-Deltares Conference on Sustainable Use and Management of Soil, Sediment and Water Resources, 2015. http://hdl.handle.net/1993/31898.

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In this thesis, the potential of enhanced geothermal system to provide adequate energy to a 10 MW electricity power plant from Prairie Evaporite Formation of Williston Basin was investigated. This formation partly consists of halite with low thermal resistance and high thermal conductivity, which translates into a lower drilling length to reach the desired temperature, comparing to other rock types. To this end, two numerical models with experimental data in south-west Manitoba (i.e. Tilston) and south-east Saskatchewan (i.e. Generic) were designed. The thermal reservoirs were located at 1.5 km (Tilston site) and 3 km (Generic site) with approximate thicknesses of 118 m. Considering an injection brine of 6% NaCl at 15°C, the final derived temperature at wellhead of the production wells were 43°C and 105°C respectively. Finally, the Generic site was concluded as a suitable candidate for electricity production by providing higher surfaced fluid temperature than the minimum of 80°C.
February 2017
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McClure, Mark W. "Fracture stimulation in enhanced geothermal systems /." 2009. http://pangea.stanford.edu/ERE/db/pereports/record_detail.php?filename=mcclure09.pdf.

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Books on the topic "Enhanced geothermal systems"

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Jelacic, Allan. Enhanced Geothermal Systems. Wiley & Sons, Incorporated, John, 2030.

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Kohl, Thomas, Norihiro Watanabe, Guido Blöcher, Mauro Cacace, and Sebastian Held. Geoenergy Modeling III: Enhanced Geothermal Systems. Springer, 2016.

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Ledésert, Béatrice A., Ronan L. Hébert, Ghislain Trullenque, Albert Genter, Eléonore Dalmais, and Jean Hérisson, eds. Enhanced Geothermal Systems and other Deep Geothermal Applications throughout Europe: The MEET Project. MDPI, 2022. http://dx.doi.org/10.3390/books978-3-0365-6053-3.

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New Trends in Enhanced, Hybrid and Integrated Geothermal Systems. MDPI, 2021. http://dx.doi.org/10.3390/books978-3-0365-2024-7.

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Department of Energy Staff and Jeffrey Tester. Future of Geothermal Energy: Impact of Enhanced Geothermal Systems on the United States in the 21st Century. Dover Publications, Incorporated, 2010.

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Technology, Massachusetts Institute of, ed. The future of geothermal energy: Impact of enhanced geothermal systems (EGS) on the United States in the 21st century : an assessment. [Cambridge, Mass.]: Massachusetts Institute of Technology, 2006.

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Department of Energy (DOE), Geothermal Technologies Program (GTP), and Energy Efficiency and Renewable Energy Office. Enhanced Geothermal Systems (EGS) - Basics of EGS and Technology Evaluation, Reservoir Development and Operation, Economics, Exploratory Wells. Independently Published, 2017.

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Government, U. S., Department of Energy (DOE), Energy Efficiency and Renewable Energy Office, and Geothermal Technologies Program. Enhanced Geothermal Systems: Report on Well Construction Technology - Case Studies, Research and Development Recommendations, Baseline Specs, Tools, Bits, Hammers. Independently Published, 2018.

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Book chapters on the topic "Enhanced geothermal systems"

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Yadav, Kriti, Anirbid Sircar, and Apurwa Yadav. "Enhanced Geothermal Systems." In Geothermal Energy, 25–38. New York: CRC Press, 2022. http://dx.doi.org/10.1201/9781003204671-2.

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Mohais, Rosemarie, Chaoshui Xu, Peter A. Dowd, and Martin Hand. "Enhanced Geothermal Systems." In Alternative Energy and Shale Gas Encyclopedia, 265–89. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119066354.ch27.

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Stober, Ingrid, and Kurt Bucher. "Enhanced-Geothermal-Systems, Hot-Dry-Rock Systems, Deep-Heat-Mining." In Geothermal Energy, 165–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-13352-7_9.

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Huenges, Ernst. "Deployment of Enhanced Geothermal Systems Plants and CO2 Mitigation." In Geothermal Energy Systems, 423–28. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2010. http://dx.doi.org/10.1002/9783527630479.ch8.

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Stober, Ingrid, and Kurt Bucher. "Enhanced-Geothermal-Systems (EGS), Hot-Dry-Rock Systems (HDR), Deep-Heat-Mining (DHM)." In Geothermal Energy, 205–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-71685-1_9.

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Nakagawa, Masami, Kamran Jahan Bakhsh, and Mahmood Arshad. "Beyond Hydrocarbon Extraction: Enhanced Geothermal Systems." In New Frontiers in Oil and Gas Exploration, 487–506. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40124-9_15.

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Koelbel, Thomas, and Albert Genter. "Enhanced Geothermal Systems: The Soultz-sous-Forêts Project." In Springer Proceedings in Energy, 243–48. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-45659-1_25.

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Stober, Ingrid, and Kurt Bucher. "Enhanced-Geothermal-Systems (EGS), Hot-Dry-Rock Systeme (HDR), Deep-Heat-Mining (DHM)." In Geothermie, 199–216. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-60940-8_9.

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Stober, Ingrid, and Kurt Bucher. "Enhanced-Geothermal-Systems (EGS), Hot-Dry-Rock Systeme (HDR), Deep-Heat-Mining (DHM)." In Geothermie, 163–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24331-8_9.

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Stober, Ingrid, and Kurt Bucher. "Enhanced-Geothermal-Systems (EGS), Hot-Dry-Rock Systeme (HDR), Deep-Heat-Mining (DHM)." In Geothermie, 171–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44638-6_9.

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Conference papers on the topic "Enhanced geothermal systems"

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Speetjens, M. F. M., and P. Bijl and M. Golombok. "Viscosified Flow Control of Enhanced Geothermal Systems." In 1st Sustainable Earth Sciences Conference and Exhibition (SES2011). Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20144123.

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Polsky, Yarom, Douglas Blankenship, A. J. (Chip) Mansure, Robert J. Swanson, and Louis E. Capuano. "Enhanced geothermal systems well construction technology evaluation." In SEG Technical Program Expanded Abstracts 2009. Society of Exploration Geophysicists, 2009. http://dx.doi.org/10.1190/1.3255790.

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Cao, Meng, and Mukul M. Sharma. "Impact of Well Placement in Enhanced Geothermal Systems." In Unconventional Resources Technology Conference. Tulsa, OK, USA: American Association of Petroleum Geologists, 2022. http://dx.doi.org/10.15530/urtec-2022-3723513.

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Porlles, J. W., and H. Jabbari. "Simulation-Based Patterns Optimization of Enhanced Geothermal Systems." In 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-2321.

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ABSTRACT: We developed a workflow to generate sensitivity analysis and optimization of an Enhanced Geothermal System (EGS) with vertical and horizontal wells in different patterns. The recovery factor, heat extraction, and NPV (Net Present Value) of each pattern were determined as a part of the sensitivity analysis. This study models a conceptual reservoir geometry and tries to answer questions related to injection patterns, reservoir parameters, and type of reservoir, and contribute with additional knowledge about how to improve an EGS. Hence, an optimal thermal flow rate that makes the most of NPV was calculated. A sensitivity study on the controlling parameters such as porosity, horizontal permeability, vertical permeability, natural fracture spacing, thermal conductivity, and thermal capacity to determine how these parameters affect the heat extraction of the reservoir was developed. A complete economic analysis of the electricity generation value was assessed from several scenarios with current electricity prices and drilling costs. 1. INTRODUCTION We generated a sensitivity analysis and optimization to evaluate how different parameters and patterns impact an EGS project economically, modeling some patterns of horizontal wells and vertical wells. The assessment covers a conceptual and simple representation of the reservoir. The purpose is to evaluate relationships between initial energy in situ of the rock and water. This evaluation was compared with the energy produced, considering a full economic analysis such as NPV, discount rate, reservoir temperature, number of horizontal and vertical drilled wells, depth, and electricity sale price. EGS is a significant opportunity to reconsider geothermal energy as a part of the next transition energy. EGS is located significantly deeper than conventional geothermal wells, between 2.7 Km to 5.5 Km; this depth is required to stimulate the rock, creating an artificial circulation system and developing a hydraulic fracturing (HF) or hydro-shearing (Gischig and Preisig, 2015). The hydraulic fracturing technique generates artificial fractures to improve the flow rate of an EGS project.
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Cloetingh, S., and J. D. van Wees and F. Beekman. "Lithosphere Tectonics and Enhanced Geothermal Systems Exploration in Europe." In 1st Sustainable Earth Sciences Conference and Exhibition (SES2011). Netherlands: EAGE Publications BV, 2011. http://dx.doi.org/10.3997/2214-4609.20144150.

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Salinas, P., C. Jacquemyn, C. Heaney, D. Pavlidis, C. Pain, and M. Jackson. "Simulation of Enhanced Geothermal Systems Using Dynamic Unstructured Mesh Optimisation." In 80th EAGE Conference and Exhibition 2018. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201800949.

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Darnet, M., C. Dezayes, J. Girard, J. Baltassat, F. Bretaudeau, T. Reuschlé, N. Coppo, J. Porte, and Y. Lucas. "Advances On Electro-Magnetic Imaging for De-Risking Enhanced Geothermal Systems Prospects." In First EAGE/IGA/DGMK Joint Workshop on Deep Geothermal Energy. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201802935.

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Zheng, Shuang, and Mukul Mani Sharma. "Factors Controlling Water-Steam Flow in Fractured Reservoirs: Application to Enhanced Geothermal Systems." In Offshore Technology Conference. OTC, 2022. http://dx.doi.org/10.4043/32041-ms.

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Abstract A model for the flow of water and steam in a fractured geothermal reservoir is presented. The flow is coupled with thermal processes and phase behavior in the reservoir and fractures using the pressure-enthalpy formulation and water-steam phase behavior. Both an implicit pressure, explicit enthalpy and a fully implicit solution algorithm have been developed. The model is validated with analytical solutions. The model is then used to demonstrate the factors that control the heat extraction rate from enhanced geothermal systems (EGS). It is found that injection rate, fracture spacing, well spacing, and effective fracture surface area have the biggest impact on the heat extraction rate. Heat conduction is the main contributor to the heat flux while convective fluid flow does not contribute much when the reservoir permeability i.e., the rate of gravity driven convection is low. The heat flux from the earth does not affect short-term EGS production but can be an important factor for long-term EGS development. The general, 3-D, multi-phase, geothermal reservoir model presented in this paper can be used to optimize and design EGS in geothermal fields (fracture spacing, well spacing, injection rate, etc.).
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Clark, Corrie, and Christopher Harto. "Lifecycle Water Consumption of Geothermal Power Systems." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98167.

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Previous assessments of the sustainability of geothermal energy have focused on resource management and associated environmental impacts during plant operations. Within these constraints, studies have shown that overall emissions, water consumption, and land use for geothermal electricity production have a smaller impact than traditional base-load electricity generation technologies. According to the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE), geothermal energy generation in the United States is projected to increase nearly threefold, from 2.37 GW to 6.30 GW, by 2035 (EIA 2012). With this potential for significant growth in geothermal electricity production, there is a need to improve understanding of the environmental impacts across the life cycle of geothermal energy production systems. This paper assesses the use of freshwater in construction, drilling, and production activities of various geothermal power plants. Four geothermal technologies were evaluated: air-cooled enhanced geothermal systems (EGSs), air-cooled hydrothermal binary systems, evaporative-cooled hydrothermal flash systems, and air-cooled geopressured systems that coproduce natural gas. The impacts associated with these power plant scenarios are compared to those from other electricity generating technologies as part of a larger effort to compare the lifecycle impacts of geothermal electricity generation to other power generation technologies.
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Karvounis, Dimitrios C., Valentin S. Gischig, and Stefan Wiemer. "Towards a Real-Time Forecast of Induced Seismicity for Enhanced Geothermal Systems." In Shale Energy Engineering Conference 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413654.026.

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Reports on the topic "Enhanced geothermal systems"

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Jeanloz, R., and H. Stone. Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), December 2013. http://dx.doi.org/10.2172/1220828.

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McLarty, Lynn, and Daniel Entingh. Enhanced Geothermal Systems (EGS) R&D Program, Status Report: Foreign Research on Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/896517.

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Jelacic, Allan, Raymond Fortuna, Raymond LaSala, Jay Nathwani, Gerald Nix, Charles Visser, Bruce Green, et al. An Evaluation of Enhanced Geothermal Systems Technology. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/1219317.

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None, None. An evaluation of enhanced geothermal systems technology. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/1217838.

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Sugama T., T. Pyatina, T. Butcher, L. Brothers, and D. Bour. Temporary Cementitious Sealers in Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), December 2011. http://dx.doi.org/10.2172/1049219.

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Kirchstetter, Thomas. Mixed-Mechanism Stimulation Enabled Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), December 2020. http://dx.doi.org/10.2172/1755429.

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Challener, William A. Multiparameter fiber optic sensing system for monitoring enhanced geothermal systems. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1056480.

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Zemach, Ezra, Peter Drakos, Paul Spielman, and John Akerley. Desert Peak East Enhanced Geothermal Systems (EGS) Project. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1373310.

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Queen, John H. Seismic Fracture Characterization Methodologies for Enhanced Geothermal Systems. Office of Scientific and Technical Information (OSTI), May 2016. http://dx.doi.org/10.2172/1252131.

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Polsky, Yarom, Louis Capuano, John Finger, Michael Huh, Steve Knudsen, A. J. Mansure Chip, David Raymond, and Robert Swanson. Enhanced Geothermal Systems (EGS) Well Construction Technology Evaluation Report. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/1219316.

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