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 18 of 18 for “"Geothermal fields"”.
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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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Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… Testing carbonate clumped isotope thermometry in geothermal fields and mineral deposits (iii) Application of carbonate and hydrous mineral isotope tools in epithermal precious metal deposits A novel approach to measure δ2H and δ18O in hydrous minerals is presented in Chapters 3-4. Measurement was …
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Deep hydrology of the geothermal systems in the Taupo Volcanic Zone, New Zealand
… flows of water and heat which give rise to the geothermal fields in the Taupo Volcanic Zone (TVZ), New Zealand. To carry out this study, a super-critical equation of state module has been developed for the geothermal simulator TOUGH2, which can describe the flow of water at the conditions …
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Deciphering the 4-D geological framework of the Taupo-Reporoa Basin: Implications for hydrothermal fluid flow and volcanism
… allowed surface outcrops to be correlated with geothermal drillhole records to at least ~3 km depth. This has resulted in the development of an age constrained 4-D basin evolutionary model. Volcanism within the TRB started >1.9 Ma with the building of large andesitic complexes that overlap …
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Potential of geothermal energy in China
This thesis provides an overview of geothermal power generation and the potential for geothermal energy utilization in China. Geothermal energy is thermal energy stored in the earth's crust and currently the only ubiquitously available form of renewable energy that does not require a fuel or …
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Fault-Controlled Damage and Permeability at the Brady Geothermal System, Nevada, U.S.A.
Identifying and locating permeable zones in geothermal fields is a critical step in determining reservoir potential and realizing energy production. Despite a general association with active faults, geothermal systems typically display heterogeneously distributed permeability that makes locating …
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Permeability modifying processes : thermal cracking and crack healing of geomaterials
… was performed on andesite plugs from the geothermal field in Awibengkok, Indonesia. Permeability (k) and specific storage capacity were measured by the oscillating flow method in a wide range permeameter, at room temperature, with effective pressures between 15 MPa and 95 MPa, before and …
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Dynamic capabilities in related diversification : the case of geothermal technology development by oil companies
… 12 major oil firms decided to diversify into the geothermal energy business under the assumption that they could easily leverage their upstream oil capabilities for that purpose. In this thesis I examine how oil firms achieve a successful related-diversification into geothermal energy technologies …
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Analysis and interpretation of clustered microseismicity at geothermal and petroleum reservoirs
… of four microearthquake clusters near geothermal and petroleum reservoirs. One cluster was induced during a controlled hydraulic fracture experiment conducted by Atlantic Richfield Corporation (ARCO). The other three clusters occurred near geothermal fields in western Italy during …
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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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Methods for addressing noise and error in controlled source electromagnetic data
… decreases the phase of measured electromagnetic fields in frequency-domain surveys. By analyzing the sensitivity of cross-well EM measurements to the in-phase and quadrature conductivities, the contribution of the quadrature conductivity (directly associated with the low-frequency polarization …
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Mediating Maendeleo: Examining the Nexus Between Geothermal Extraction, Wildlife Conservation and Community Well-being in Olkaria-Suswa, Southern Kenya
… that intricately but fractiously weave together geothermal development, wildlife conservation, and community well-being as well as claims and struggles of belonging. Four villages - Olomayiana, RAPland and Mt. Suswa- were purposefully selected for the study. A mixed method approach that entailed …
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The role of well testing in geothermal resource assessment
… well test data to estimate the capacity of a geothermal field are evaluated. The thesis lays emphasis on well completion and flow tests data, and uses the Reykjanes geothermal field in southwest Iceland as an example for the application of the selected methods. Analyses of data from step-rate …
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Thermo-economic optimation of slim power cycles : a case of Ngozi geothermal project-Tanzania
Ngozi geothermal field located in Mbeya Tanzania, is the main geothermal project that the country focuses on, aiming at producing clean energy in term of both electricity and heat. The project is an exploration drilling phase. The present study focuses on developing an optimized strategy in terms …
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Bayesian source inversion of microseismic events
… such as in volcanic eruptions and natural geothermal fields, or are linked to anthropogenic activities including hydrofracture of gas and oil reservoirs, mining events and extraction of geothermal fluids. Source inversion is very sensitive to uncertainties in both the model and the data, …
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Natural state modelling of a vapor dominated system : case study Darajat, Indonesia
For a mature geothermal field like Darajat, which has been operating for nearly 30 years, re-evaluating the natural state offers an opportunity to evaluate any significant differences revealed by current interpretations from expanded data sets with those presented in the early model. This study …
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Remote sensing techniques for geothermal investigation and monitoring in New Zealand
… for the investigation and monitoring of geothermal areas in the Taupo volcanic zone of New Zealand. The research and development of a helicopter-borne video thermal infrared scanner technique and associated computer image processing methods constitutes the major portion of this study. In …
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Stratigraphy, Structure, and Fluid Flow at the Soda Lake Geothermal Field, western Nevada, USA
… assessed the geologic setting of the Soda Lake geothermal field, which lies in the southern part of the Carson Sink basin of northwestern Nevada within the Basin and Range of the western USA. The Basin and Range is a world-class geothermal province with significant untapped potential, …