Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"geothermal reservoir"”.
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Geothermal reservoir characterisation using automated mineralogy; implications for CO2 sequestration
… to the collection of core samples during geothermal exploration, although providing less lithological detail than cores. In this study,drill cuttings collected from the Nesjavellir geothermal field in Iceland were analysed using SEM based automated mineralogy to determine any benefits this …
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Further development and application of GEOFRAC flow to a geothermal reservoir
… 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 flow rate in production. A parametric study was conducted in order to check the sensitivity of the output of the model and to explain how …
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Imaging the Soultz Enhanced Geothermal Reservoir using double-difference tomography and microseismic data
… velocity structure of the European Hot Dry Rock geothermal reservoir (also known as the Soultz Enhanced Geothermal System) at Soultz-sous-Forets, France. We used absolute, differential catalog and differential cross-correlation times obtained from the reservoir's September and October 1993 …
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Estimation of sustainable production limit by using lumped parameter and USGS hydrotherm simulation
… the production and investigate the nature of geothermal reservoir. The objective of this thesis can be summarized by defining sustainable production limits by using time and cost-effective models for given geothermal reservoirs. Lumpfit V3 software which based on nonlinear iterative least …
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Numerical and analytical modeling of heat transfer between fluid and fractured rocks
… evaluation. In conventional fracture dominated geothermal systems with reinjection, this modeling process is also helpful for understanding how the thermal front migrates and for optimizing of reservoir management strategies. Both numerical and analytical approaches are used to help us get a …
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Numerical study of downhole heat exchanger concept in geothermal energy extraction from saturated and fractured reservoirs
Geothermal energy has gained a lot of attention recently due to several favorable aspects such as ubiquitously distributed, renewable, low emission resources while leveraging the advances in the associated technologies such as directional drilling and low enthalpy power generation plant. However, …
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Numerical modeling of cold water injection into supercritical geothermal reservoirs
… exploitation of the Earth’s resources. Geothermal energy is a renewable energy resource found in the reservoirs of high temperature geothermal systems. In broad terms a high temperature geothermal system is comprised of a multitude of processes which redistribute heat and mass via fluid …
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Seismic characterization of geothermal reservoirs by application of the common-reflection-surface stack method and attribute analysis
… portfolio is the exploration and utilization of geothermal resources. For the development of a geothermal project at great depths a detailed geological and geophysical exploration program is required in the first phase. With the help of active seismic methods high-resolution images of the …
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Hot dry rock reservoir modelling
Geothermal energy reserves are significantly underdeveloped resources, and field experiments have shown the energy produced from this resource is clean and sustainable. Deep geothermal resources represent one form of geothermal energy, and the most widely used, in terms of commercial viability, are …
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Modelling the La Soufrière hydrothermal system, St. Vincent and the Grenadines
This project reports the first attempt to build a reservoir model for the La Soufrière hydrothermal system. This project will lay the foundation for future models of this system and further develop St. Vincent’s geothermal energy. Reykjavík Geothermal provided the geological and geothermal data in …
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Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems
… 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 …
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Feasibility study of sedimentary enhanced geothermal systems using reservoir simulation
… the preliminary feasibility of commercial geothermal projects, from a sedimentary reservoir with low permeability that requires productivity enhancement, using numerical reservoir simulation. The performance of a sedimentary geothermal reservoir is investigated in terms of reservoir …
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Complexity analysis of lumped parameter models : development of complexity reduction algorithm
… models have been shown to be a useful tool for geothermal reservoir analysis and production planning. Tank models are a common form of lumped parameter models, incorporating tanks of given capacitance partially filled with fluid. Between the tanks are connections with given conductance, that …
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Geophysical investigation and assessment of the Rye Patch Known Geothermal Resource Area, Rye Patch, Nevada
… survey was conducted at the Rye Patch Known Geothermal Resource Area located at Rye Patch, Nevada. The purpose of the study was to attempt to further delineate the geothermal reservoir and/or to identify potential drilling targets. The survey consisted of collecting data at 264 new stations …
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Geophysical imaging methods for analysis of the Krafla Geothermal Field, NE Iceland
… to be reliable methods for characterizing geothermal sites and reservoirs while reducing drilling and production risks. In this study, we applied a finite difference tomography method and a double-difference tomography method to image the P- and S-wave velocity structure of the Krafla …
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Investigation of changes in permeability due to poro-thermo-elastic effects in enhanced geothermal reservoirs
… circulation of cold water over a longer term in geothermal reservoirs is presented. A hybrid of tectonic simulation and stochastic analysis of field data is utilized to generate the subsurface fracture map of three formations. For this purpose, a geological structure is reconstructed according to …
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Characterising subaerial basaltic ‘a‘ā lava flows as potential geothermal reservoirs: Nordeste volcanic complex, Volcanic, São Miguel, Azores
Globally there is an abundance of geothermal resources that are suitable for low enthalpy geothermal energy generation, such as ground source heating however, very few of these have been utilised. Specific to São Miguel, The Azores, there are plenty of geothermal manifestations in the form of hot …
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Geomechanical Reservoir Model Calibration and Uncertainty Assessment from Microseismic Data
… of low permeability rocks in unconventional reservoirs has been observed to trigger microearthquakes (MEQs). Triggering of the MEQ events has been linked to the pore pressure, temperature, and in-situ stress variations which result in crack initiation. The resulting clouds of micro-seismic …
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CO₂ and Heat Release from Magmatic Hydrothermal Systems: Insights from CO₂ Flux and Other Modern Methods
… relationship between these datasets and the deep geothermal reservoir, which provides the research gap and focus of this research. The goal of this thesis is to determine whether statistical analysis of CO2 flux and heat flux datasets can provide information on the deep reservoir; to extend the …
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Gravity studies of the Guayabo Caldera and the Miravalles geothermal field, Costa Rica
… study the temporal evolution of the Miravalles Geothermal Field. Detailed density and stratigraphy studies of both the drilled and exposed geology have both complemented and constrained the caldera gravity models. A new caldera volume - erupted mass balance model is proposed that computes the …
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