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 21 for “"Geothermal reservoirs"”.
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Thermal cracking in nonporous geothermal reservoirs
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
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Mathematical Scaling and Statistical Modeling of Geopressured Geothermal Reservoirs
<p>The interest for developing geopressured-geothermal reservoirs along the US Gulf Coast is increasing for securing energy needs and reducing global warming. Identifying the most attractive candidate reservoirs for geothermal energy production requires quick and simple models. Analytical models …
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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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The 3D in-situ stress field and its changes in geothermal reservoirs
… differential stress. In particular for enhanced geothermal systems with a low permeability large rotations of the stress tensor are indicated. According to these findings the estimation of the initial differential stress in a reservoir is possible provided the permeability is known and the angle …
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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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The application of the self potential profiling method in the delineation of buried geothermal reservoirs
… been applied in the discovery and delineation of geothermal reservoirs in sedimentary sequences of strata. Laboratory data show that upon the introduction of heat to simulated reservoir systems, at differing physical boundaries where coupling exists, electric currents are generated which can be …
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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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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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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 simulation and optimization of cyclic and continuous fluid injection for geothermal energy recovery
Geothermal energy is a viable solution for reducing greenhouse gas emissions and mitigating climate change. It has a wide geographic distribution, requires little exploration and operation costs, and has virtually no carbon emissions. This renewable energy source can generate electricity, provide …
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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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Design of Fouling-Resistant Coatings for Energy Systems: Theory and Proof of Principle at Realistic Conditions
… energy production. From nuclear power plants to geothermal reservoirs, fouling increases system pressure drops, impedes heat transfer, and accelerates corrosion, leading to derating and early failure. Here we propose and demonstrate a design principle for foulant-agnostic thin film …
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The geothermal potential of Luxembourg
The aim of this work is the evaluation of the geothermal potential of Luxembourg. The approach consists in a joint interpretation of different types of information necessary for a first rather qualitative assessment of deep geothermal reservoirs in Luxembourg and the adjoining regions in the …
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Uncertainty in Geothermal Numerical Models: a Contribution from Geostatistics and Bayesian Methods
Numerical models of geothermal reservoirs are a valuable tool to understand the processes that control subsurface flow and to help engineers and scientists to manage these resources. However, there are a number of uncertainties that modellers have to face to generate reliable predictions. The …
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Transient modeling of host rock for a deep borehole nuclear waste repository
… simulation of fluid flow and heat transport in geothermal reservoirs, and therefore provided a valuable reference. Additional features were implemented in FALCON in order to simulate deep borehole repositories. Solver options were adjusted for best performance. Code verification was performed on …
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Applying U-Th Disequilibrium to Dating Siliceous Sinter
… crustal transport of heat and mass captured for geothermal energy and mineral exploration. Thus, understanding their temporal evolution and longevity is important for resource characterization. In particular, high temperature reservoirs (> 170°C), which are commonly marked at the surface by …
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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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Use of hydraulic tests to identify conceptual models of heterogeneity for fractured rock aquifers
Important aquifers, petroleum reservoirs, geothermal reservoirs, and waste disposal sites throughout the world are located in fractured rock formations. Responsible management of these resources and sites requires appropriate field characterization studies and modeling techniques to assess the …
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Characterizing microearthquakes and shallow structure with dense array and optical fibers
… purposes. Here, I use cables in wells in geothermal reservoirs and a telecom cable on the MIT campus. The applications include structure monitoring and imaging, seismic hazard assessment, and earthquake source characterization. DAS measures strain and requires special considerations to fit …
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Modelling of Subsidence in Geothermal Fields
… is an environmental issue at New Zealand geothermal fields, particularly Wairakei. It has resulted in submissions to geothermal resource consent hearings, subsequent operational consent conditions and long-term monitoring programs. Wairakei geothermal field has a complex subsidence …
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