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Ingo Sass - One of the best experts on this subject based on the ideXlab platform.
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3D-Model of the Deep Geothermal Potentials of Hesse (Germany) for Enhanced Geothermal Systems
2014Co-Authors: Ingo SassAbstract:Within the scope of the research project "3D-Model of the Deep Geothermal potentials of Hesse" the Deep Geothermal potential of the federal state of Hesse was assessed. The quantification of the heat stored under ground and the analysis of the Deep Geothermal potential was performed for different Geothermal systems, as hydrothermal and petrothermal systems (enhanced Geothermal systems) as well as fault zones and closed systems like Deep borehole heat exchangers. Knowledge of the geological structure and the Geothermal properties of the potential reservoir rocks as well as the reservoir temperatures are indispensable for this approach. Therefore, the geological structure and the temperature distribution in the subsurface was modeled in 3D to a depth of 6 km below ground. To allow predictions of the Geothermal properties, a data set based on outcrop analogue studies, borehole data and core investigations as well as hydraulic tests was compiled for all relevant formations. Systematic measurements of thermophysical and hydraulic rock properties such as thermal conductivity, thermal diffusivity, heat capacity, density, porosity and permeability of relevant geologic formations was combined with in situ temperature measurements, hydrothermal upwelling zones, characteristics of geological faults and were added to the 3D geological structural model. Since both the hydraulic and thermophysical properties depend on the in situ conditions of the reservoir, the lab and field data need to be adapted accordingly. Therefore, the outcrop analogue data was correlated with in situ data from hydrocarbon exploration wells to develop empiric functions for their depth and temperature dependency. Using the example of the hydroand petrothermal potentials, we present a newly developed multiple criteria approach, which assesses various rock and reservoir properties and their relevance for the different Geothermal systems to define the overall potential of each system. The method can be used for a 3D-grid based identification and visualization of different geopotentials using various parameters to determine each potential. Therefore, threshold values for each parameter had to be defined to specify the grade of potential. The resulting Geothermal model, which incorporates the quantification and the analysis of the Deep Geothermal potentials, defines the location of high potential areas where further exploration and future exploitation of the Geothermal resources is feasible and shows that overall the natural Geothermal potential is high enough to cover the energy demand of the whole federal state of Hesse. Additionally, it is available online as an instrument for public information and can be used as an important tool for the exploration and planning phase for the design of Geothermal power plants.
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Investigation of the Deep Geothermal potentials of Hesse (Germany)
2013Co-Authors: D. Arndt, Andreas Hoppe, Ingo SassAbstract:Within the scope of the research project "3Dmodelling of the Deep Geothermal potentials of Hesse" the Deep Geothermal potential of the Federal State of Hesse was assessed in a comprehensive approach. The heat in place has been quantified and the Deep Geothermal potentials were analyzed for different Geothermal systems, as hydrothermal and petrothermal systems as well as fault related and closed systems like Deep borehole heat exchangers. For the assessment of the Deep Geothermal potential, knowledge of the geological structure and the Geothermal properties of the potential reservoir rocks are indispensable. Therefore, a 3D geological structural model of the Federal State of Hesse (Germany) has been developed (Arndt 2012). For the assessment of Deep Geothermal potentials, the reservoir temperature is the key parameter. Therefore, the temperature distribution in the subsurface was modelled to a depth of 6 km below surface using actual data measured in Deep wells. This model allows the prognosis of the underground temperature with a
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Outcrop analogue studies for reservoir characterization and prediction of Deep Geothermal systems in the Molasse Basin , Germany
Geophysical Research Abstracts, 2011Co-Authors: Sebastian Homuth, Annette E Götz, Ingo SassAbstract:The utilization of Deep Geothermal systems is based on a detailed knowledge of their distinct reservoir characteristics. In the early stages of hydrothermal reservoir exploration, the thermo-physical characterization of the reservoir is mainly accomplished by evaluation of already existing drilling data in the vicinity of the target area and in some cases seismic surveys. For reservoir predictions, the main Geothermal parameters such as permeability, thermal conductivity, specific heat capacity and reservoir heat flow have to be quantified. In addition to these thermo-physical parameters in-situ stress field analysis and structural tectonic data is important to assess. Outcrop analogue studies enable the determination and correlation of the thermo-physical parameters and structural geology data with detailed facies pattern, therefore the Geothermal exploration concept becomes more precise and descriptive. An outcrop analogue investigation examines the same rock formations (stratigraphy, lithology, facies) such as the potential reservoir formations from which fluids at according depth are discharged. For the economic utilization of Deep Geothermal reservoirs, a sufficient high flow rate of thermal waters throughout the reservoir to the production well is necessary. This flow rate is mainly controlled by the reservoir permeability. In the Molasse Basin the limestone formations of the Upper Jurassic contain the main flow paths through tectonic elements such as faults, joints and fractures, and to some extend also, typically for limestone formations, through karst phenomena. To characterize those fracture controlled reservoirs information about the structure, texture, geometry and thermo-physical properties of the reservoir formations are essential. An outcrop analogue study of the target formation Malm of the Upper Jurassic, which is the most promising formation for Deep Geothermal projects in the German Molasse Basin, together with the correlation of distinct sedimentary facies and their thermo-physical parameters may contribute to establish integrated structural 3D reservoir models. The inferred predictions from the laboratory testing can be validated with actual drilling data and pump test data from recent drill sites. Due to the fact that a precise classification of facies zones in the target depth of the Geothermal reservoir is not possible, the outcrop analogue study area was selected to the Swabian and Franconian Alb as well as to the transition zone of these two facies areas. The facies related characterization and prediction of Geothermal reservoir parameters is also a powerful tool for the maintenance, operation and quality management of an existing Geothermal reservoir. The results of this study can be used for further drilling design plans and reservoir enhancement measures. Here, we present first research results of the mechanical and thermo-physical laboratory investigations of limestone formations of the Upper Jurassic (Malm), which were sampled during a field campaign in the according outcrop areas of the Swabian und Franconian Alb in South Germany. Outcrop analogue studies for reservoir characterization and prediction of Deep Geothermal systems in the Molasse Basin, Germany (PDF Download Available). Available from: https://www.researchgate.net/publication/259017465_Outcrop_analogue_studies_for_reservoir_characterization_and_prediction_of_Deep_Geothermal_systems_in_the_Molasse_Basin_Germany [accessed Mar 10, 2016].
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Reservoir characterization and prediction of Deep Geothermal systems integrating outcrop analogue studies
2010Co-Authors: Sebastian Homuth, Annette E Götz, Ingo Sass, Á. TörökAbstract:The use of Deep Geothermal systems is based on a detailed knowledge of their distinct reservoir characteristics. In the early stages of hydrothermal reservoir exploration, characterization of the reservoir is mainly accomplished by evaluation of drilling data and in some cases seismic surveys. However, for reservoir prognosis, the main Geothermal parameters such as (1) permeability, (2) thermal conductivity, and (3) reservoir heat flow have to be quantified. Outcrop analogue studies enable the determination and correlation of the necessary parameters, and based on detailed facies analysis, the Geothermal exploration concept becomes more precise and descriptive. Finally, the detection of distinct sedimentological features and the interpretation of the spatio-temporal development of sedimentary facies within a specific exploration area may contribute to establish integrated structural 3D reservoir models. Here, we present examples from Mesozoic limestone formations of the Molasse Basin and the Pannonian Basin.
Eva-Maria Jakobs - One of the best experts on this subject based on the ideXlab platform.
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The potential of Facebook® for communicating complex technologies using the example of Deep Geothermal energy
2015 IEEE International Professional Communication Conference (IPCC), 2015Co-Authors: Simone Wirtz-brückner, Eva-Maria Jakobs, Sylvia Kowalewski, Johanna Kluge, Martina ZiefleAbstract:Professional and transparent communication processes are crucial for the introduction of new complex technologies. In this context, the potential of social media applications such as Facebook has still to be investigated. Therefore, this paper addresses the potential of Facebook as an instrument in communicative measures for the acceptance of complex technologies taking Deep Geothermal energy as an example. Based on socio-scientific and linguistic approaches the special characteristics of Facebook as a communication and interaction environment and specific Facebook components are described. The description leads to a discussion about the opportunities and risks of using Facebook in communicative measures. Also, recommendations for the usage of specific Facebook components are given. The discussion shows that Facebook is suited for information as well as inclusion purposes. The Facebook components fan pages, groups and events can be applied as useful components in comprehensive communication strategies for complex technologies. The considerations and recommendations in this study are useful for communication professionals who develop and carry out communication concepts as well as for researchers who deal with Facebook in professional contexts.
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IPCC - The potential of Facebook® for communicating complex technologies using the example of Deep Geothermal energy
2015 IEEE International Professional Communication Conference (IPCC), 2015Co-Authors: Simone Wirtz-brückner, Eva-Maria Jakobs, Sylvia Kowalewski, Johanna Kluge, Martina ZiefleAbstract:Professional and transparent communication processes are crucial for the introduction of new complex technologies. In this context, the potential of social media applications such as Facebook has still to be investigated. Therefore, this paper addresses the potential of Facebook as an instrument in communicative measures for the acceptance of complex technologies taking Deep Geothermal energy as an example. Based on socio-scientific and linguistic approaches the special characteristics of Facebook as a communication and interaction environment and specific Facebook components are described. The description leads to a discussion about the opportunities and risks of using Facebook in communicative measures. Also, recommendations for the usage of specific Facebook components are given. The discussion shows that Facebook is suited for information as well as inclusion purposes. The Facebook components fan pages, groups and events can be applied as useful components in comprehensive communication strategies for complex technologies. The considerations and recommendations in this study are useful for communication professionals who develop and carry out communication concepts as well as for researchers who deal with Facebook in professional contexts.
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IPCC - Web comment-based trend analysis on Deep Geothermal energy
IEEE International Professonal Communication 2013 Conference, 2013Co-Authors: Bianka Trevisan, Denise Eraßme, Eva-Maria JakobsAbstract:In this paper we present the initial results of a national trend analysis - an approach that allows collecting and investigating location- and time-specific acceptance factors from user-generated content. For this purpose, an annotation scheme is adapted that is originally developed for sentiment analysis and opinion detection. By applying this annotation scheme, German Web comments of a newspaper and a news-site are quantitatively and qualitatively analyzed. The analysis focuses on the investigation of acceptance drivers of Deep Geothermal energy. Thereby, it is assumed that the public opinion - positive, negative or neutral - is location-and time-dependent. In contradiction, media often draw an adulterated picture of citizen opinions. Our initial assumption of opposed opinions on Deep Geothermal energy in public and media was confirmed by the conducted trend analysis.
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Web comment-based trend analysis on Deep Geothermal energy
IEEE International Professonal Communication 2013 Conference, 2013Co-Authors: Bianka Trevisan, Denise Eraßme, Eva-Maria JakobsAbstract:In this paper we present the initial results of a national trend analysis - an approach that allows collecting and investigating location- and time-specific acceptance factors from user-generated content. For this purpose, an annotation scheme is adapted that is originally developed for sentiment analysis and opinion detection. By applying this annotation scheme, German Web comments of a newspaper and a news-site are quantitatively and qualitatively analyzed. The analysis focuses on the investigation of acceptance drivers of Deep Geothermal energy. Thereby, it is assumed that the public opinion - positive, negative or neutral - is location-and time-dependent. In contradiction, media often draw an adulterated picture of citizen opinions. Our initial assumption of opposed opinions on Deep Geothermal energy in public and media was confirmed by the conducted trend analysis.
Günter Zimmermann - One of the best experts on this subject based on the ideXlab platform.
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Exponential trends in flowback chemistry from a hydraulically stimulated Deep Geothermal borehole in granite; Pohang, South Korea
E3S Web of Conferences, 2019Co-Authors: David Banks, Rob Westaway, Günter Zimmermann, Neil Burnside, Hannes HofmannAbstract:Samples of flowback water from a 4.3 km Deep Geothermal borehole in granite (Pohang, South Korea) were collected following a period of hydraulic stimulation by injection of surface water. Electrical conductivity, temperature and water chemistry of the flowback water were measured. To a first approximation, the data conform closely to a simple ‘mixing tank’ model, with an exponential trend between two end members: an initial injected surface water to a more brackish ‘resident groundwater’ composition. Significant deviation from the ‘mixing tank’ trend would be an indication of significant recent water-rock interaction or other anomalous factors. Such a deviation can tentatively be seen in Na + /Cl - data, especially between 88 and 200 m 3 flowback (2.8 to 8.8 hr).
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hydraulic history and current state of the Deep Geothermal reservoir gros schonebeck
Geothermics, 2016Co-Authors: Guido Blocher, Simona Regenspurg, Thomas Reinsch, Jan Henninges, Harald Milsch, Juliane Kummerow, Henning Francke, Stefan Kranz, Ali Saadat, Günter ZimmermannAbstract:Abstract This study addresses the thermal–hydraulic–mechanical and chemical (THMC) behaviour of a research well doublet consisting of the injection well E GrSk 3/90 and the production well Gt GrSk 4/05 A(2) in the Deep Geothermal reservoir of Gros Schonebeck (north of Berlin, Germany). The reservoir is located between 3815 and 4247 m below sea level in the Lower Permian of the North German Basin (NGB). Both wells were hydraulically stimulated to enhance productivity. For the production well three stimulation treatments were performed in 2007: these three treatments result in a productivity increase from 2.4 m3/(h MPa) to 14.7 m3/(h MPa). The injection well was stimulated four times in 2002/2003, resulting in a corresponding productivity increase from 0.97 m3/(h MPa) to 7.5 m3/(h MPa). The necessary infrastructure for production and subsequent injection of Geothermal fluid was established in June 2011. Between June 8, 2011 and November 8, 2013, 139 individual hydraulic tests were performed with produced/injected volumes ranging from 4.4 to 2567 m3. The productivity index decreased non-linearly from 8.9 m3/(h MPa) on June 8, 2011 to 0.6 m3/(h MPa) on November 8, 2013. Five possible reasons for the productivity decrease are discussed: wellbore fill, wellbore skin, the sustainability of induced fractures, two phase flow and compartmentalisation. For all hydraulic tests, the injectivity index remains almost constant at 4.0 m3/(h MPa). During 17 of 139 hydraulic tests a sudden increase of the productivity was observed. Possible reasons for this effect are discussed: accumulation of free gas and/or fines and scales within the fracture as well as changing hydraulic properties due to changing mechanical load on the fracture.
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New Approaches of Coupled Simulation of Deep Geothermal Systems
2015Co-Authors: Guido Blocher, Mauro Cacace, Liwah Wong, Oliver Kastner, Günter Zimmermann, Ernst Huenges, Olaf Kolditz, Helmholtz-zentrum PotsdamAbstract:Determining flows, heat transfer and reactive transport processes in natural faulted and fractured geological systems receives increasing attention. Efforts are not only restricted to a better geological characterization of the complex geometry of the faulted and fractured rock reservoirs but also to describe the actual geometry and to simulate the dynamics of flow and transport processes in these natural systems. In this paper, a technical description of an improved method is presented to represent non-planar structures of deviated wells (1D) and faults and fractures (2D) within a boundary conforming Delaunay unstructured mesh (3D). The main advantage of this approach is that these dipping structures can be integrated into a 3D volume representing the hosting porous matrix. Consequently, the interaction between the discrete flow paths through and across faults and fractures and within the rock matrix can be correctly simulated. The crucial factor that makes the approach applicable to real case geological systems is that all algorithms are parallel thus computing time increase approximately linearly with data volumes. This approach is presented in terms of a real case study of the Deep Geothermal reservoir of Gros Schonebeck in the North of Berlin, Germany. The model domain includes six major geological units, three major fault zones and a doublet system consisting of four induced hydraulic fractures. This domain was triangulated resulting in 6,191,564 tetrahedra and subsequently used for dynamic simulation.
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3d numerical modeling of hydrothermal processes during the lifetime of a Deep Geothermal reservoir
Geofluids, 2010Co-Authors: Mando Guido Blocher, Günter Zimmermann, Inga Moeck, W Brandt, Alireza Hassanzadegan, Fabien MagriAbstract:Understanding hydrothermal processes during production is critical to optimal Geothermal reservoir management and sustainable utilization. This study addresses the hydrothermal (HT) processes in a Geothermal research doublet consisting of the injection well E GrSk3/90 and production well Gt GrSk4/05 at the Deep Geothermal reservoir of Gros Schonebeck (north of Berlin, Germany) during Geothermal power production. The reservoir is located between −4050 to −4250 m depth in the Lower Permian of the Northeast German Basin. Operational activities such as hydraulic stimulation, production (T = 150°C; Q = −75 m3 h−1; C = 265 g l−1) and injection (T = 70°C; Q = 75 m3 h−1; C = 265 g l−1) change the HT conditions of the Geothermal reservoir. The most significant changes affect temperature, mass concentration and pore pressure. These changes influence fluid density and viscosity as well as rock properties such as porosity, permeability, thermal conductivity and heat capacity. In addition, the geometry and hydraulic properties of hydraulically induced fractures vary during the lifetime of the reservoir. A three-dimensional reservoir model was developed based on a structural geological model to simulate and understand the complex interaction of such processes. This model includes a full HT coupling of various petrophysical parameters. Specifically, temperature-dependent thermal conductivity and heat capacity as well as the pressure-, temperature- and mass concentration-dependent fluid density and viscosity are considered. These parameters were determined by laboratory and field experiments. The effective pressure dependence of matrix permeability is less than 2.3% at our reservoir conditions and therefore can be neglected. The results of a three-dimensional thermohaline finite-element simulation of the life cycle performance of this Geothermal well doublet indicate the beginning of thermal breakthrough after 3.6 years of utilization. This result is crucial for optimizing reservoir management. Geofluids (2010) 10, 406–421
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slip tendency analysis fault reactivation potential and induced seismicity in a Deep Geothermal reservoir
Journal of Structural Geology, 2009Co-Authors: Inga Moeck, Grzegorz Kwiatek, Günter ZimmermannAbstract:Abstract A slip tendency analysis is used to assess the reactivation potential of shear and dilational fractures in a Deep Geothermal reservoir in the Northeast German Basin, based on the notion that slip on faults is controlled by the ratio of shear to normal stress acting on the plane of weakness in the in situ stress field. The reservoir rocks, composed of Lower Permian sandstones and volcanics, were stimulated by hydraulic fracturing. A surprisingly low microseismic activity was recorded with moment magnitudes MW ranging from −1.0 to −1.8. The slip tendency analysis suggests a critically stressed reservoir exists in the sandstones, whereas the volcanic rocks are less stressed. Rock failure first occurs with an additional pore pressure of 20 MPa. Presumed failure planes form a conjugate set and strike NW and NE. Slip failure is more likely than tensional failure in the volcanic rocks because high normal stresses prevent tensional failure. These results from slip tendency analysis are supported by the spatial distribution of recorded microseismicity. Source characteristics indicate slip rather than extension along presumed NE striking failure planes. This suggests that slip tendency analysis is an appropriate method that can be used to understand reservoir behavior under modified stress conditions.
Paola Lettieri - One of the best experts on this subject based on the ideXlab platform.
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life cycle inventory data and impacts on electricity production at the united downs Deep Geothermal power project in the uk
Data in Brief, 2020Co-Authors: Andrea Paulillo, Lucy Cotton, Alberto Striolo, Paola LettieriAbstract:Abstract This data article supports the research article “Geothermal energy in the UK: the life-cycle environmental impacts of electricity production from the United Downs Deep Geothermal Power project”. The article reports inventory data, primarily on the construction of the Geothermal wells, that is not reported in the main article, and the complete, disaggregated numerical values of the life-cycle environmental impacts reported only in part and in graphical form in the research article. The article also includes data supporting comparative analyses between Deep Geothermal energy and other energy technologies in the UK, and between the impacts of the construction of wells in a Deep and conventional power plant.
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Geothermal energy in the uk the life cycle environmental impacts of electricity production from the united downs Deep Geothermal power project
Journal of Cleaner Production, 2020Co-Authors: Andrea Paulillo, Lucy Cotton, Alberto Striolo, Paola LettieriAbstract:Abstract The UK is rich in heat-producing granites, especially in the county of Cornwall, suggesting the potential for energy production with low environmental footprint. The United Downs Deep Geothermal Power (UDDGP) project aims to demonstrate the technical and commercial viability to produce electricity from the Cornish Geothermal resource, exploiting the natural permeability of a significant Deep structural fracture zone known as the Porthtowan Fault Zone. Drilling of the first well started at the end of 2018, and the plant is expected to be operational by mid-2020. A relevant question is whether Deep Geothermal energy is truly environmentally benign. This article presents a comprehensive and detailed Life Cycle Assessment study that i) identifies the main life-cycle sources of environmental impacts for the production of electricity in the UDDGP plant; ii) investigates the effects on the environmental impacts of significant uncertainties surrounding the project, such as availability of Geothermal fluid and configuration of the power plant, and iii) compares the performance of the UDDGP operation, and by extension of the putative Geothermal energy production in the UK, with other key energy sources in the country. The life cycle inventory relies on a combination of site-specific data for wells construction and literature data for above-surface facilities and stimulation techniques. We validated our model by comparing climate change impacts of UDDGP with those reported by other studies on enhanced Geothermal systems. Our results show that the greatest portion of environmental impacts originates from the construction phase (primarily due to steel for wells casing and diesel used during drilling), whilst the scenario analysis demonstrates that increasing installed capacity and cogenerating heat and power are the most effective strategies for improving the environmental performance. Our analysis also suggests that the environmental impacts may increase by ∼35% if stimulation techniques are required to increase the Geothermal wells productivity. Compared to alternative energy sources, in the category climate change, UDDGP performs better than solar energy and is comparable with wind and nuclear. It is shown that the environmental benefits of Geothermal energy are not straightforward and that a number of trade-offs needs to be considered when other impact categories are quantified.
Sebastian Homuth - One of the best experts on this subject based on the ideXlab platform.
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Outcrop analogue studies for reservoir characterization and prediction of Deep Geothermal systems in the Molasse Basin , Germany
Geophysical Research Abstracts, 2011Co-Authors: Sebastian Homuth, Annette E Götz, Ingo SassAbstract:The utilization of Deep Geothermal systems is based on a detailed knowledge of their distinct reservoir characteristics. In the early stages of hydrothermal reservoir exploration, the thermo-physical characterization of the reservoir is mainly accomplished by evaluation of already existing drilling data in the vicinity of the target area and in some cases seismic surveys. For reservoir predictions, the main Geothermal parameters such as permeability, thermal conductivity, specific heat capacity and reservoir heat flow have to be quantified. In addition to these thermo-physical parameters in-situ stress field analysis and structural tectonic data is important to assess. Outcrop analogue studies enable the determination and correlation of the thermo-physical parameters and structural geology data with detailed facies pattern, therefore the Geothermal exploration concept becomes more precise and descriptive. An outcrop analogue investigation examines the same rock formations (stratigraphy, lithology, facies) such as the potential reservoir formations from which fluids at according depth are discharged. For the economic utilization of Deep Geothermal reservoirs, a sufficient high flow rate of thermal waters throughout the reservoir to the production well is necessary. This flow rate is mainly controlled by the reservoir permeability. In the Molasse Basin the limestone formations of the Upper Jurassic contain the main flow paths through tectonic elements such as faults, joints and fractures, and to some extend also, typically for limestone formations, through karst phenomena. To characterize those fracture controlled reservoirs information about the structure, texture, geometry and thermo-physical properties of the reservoir formations are essential. An outcrop analogue study of the target formation Malm of the Upper Jurassic, which is the most promising formation for Deep Geothermal projects in the German Molasse Basin, together with the correlation of distinct sedimentary facies and their thermo-physical parameters may contribute to establish integrated structural 3D reservoir models. The inferred predictions from the laboratory testing can be validated with actual drilling data and pump test data from recent drill sites. Due to the fact that a precise classification of facies zones in the target depth of the Geothermal reservoir is not possible, the outcrop analogue study area was selected to the Swabian and Franconian Alb as well as to the transition zone of these two facies areas. The facies related characterization and prediction of Geothermal reservoir parameters is also a powerful tool for the maintenance, operation and quality management of an existing Geothermal reservoir. The results of this study can be used for further drilling design plans and reservoir enhancement measures. Here, we present first research results of the mechanical and thermo-physical laboratory investigations of limestone formations of the Upper Jurassic (Malm), which were sampled during a field campaign in the according outcrop areas of the Swabian und Franconian Alb in South Germany. Outcrop analogue studies for reservoir characterization and prediction of Deep Geothermal systems in the Molasse Basin, Germany (PDF Download Available). Available from: https://www.researchgate.net/publication/259017465_Outcrop_analogue_studies_for_reservoir_characterization_and_prediction_of_Deep_Geothermal_systems_in_the_Molasse_Basin_Germany [accessed Mar 10, 2016].
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Reservoir characterization and prediction of Deep Geothermal systems integrating outcrop analogue studies
2010Co-Authors: Sebastian Homuth, Annette E Götz, Ingo Sass, Á. TörökAbstract:The use of Deep Geothermal systems is based on a detailed knowledge of their distinct reservoir characteristics. In the early stages of hydrothermal reservoir exploration, characterization of the reservoir is mainly accomplished by evaluation of drilling data and in some cases seismic surveys. However, for reservoir prognosis, the main Geothermal parameters such as (1) permeability, (2) thermal conductivity, and (3) reservoir heat flow have to be quantified. Outcrop analogue studies enable the determination and correlation of the necessary parameters, and based on detailed facies analysis, the Geothermal exploration concept becomes more precise and descriptive. Finally, the detection of distinct sedimentological features and the interpretation of the spatio-temporal development of sedimentary facies within a specific exploration area may contribute to establish integrated structural 3D reservoir models. Here, we present examples from Mesozoic limestone formations of the Molasse Basin and the Pannonian Basin.
