Blar i Institutt for geovitenskap og petroleum på dokumenttype "Doctoral thesis"
Viser treff 81-100 av 223
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Geomechanics and Rock Physics of Anisotropic Overburden Shales
(Doctoral theses at NTNU;2023:326, Doctoral thesis, 2023)Shales, with their diverse composition and complex properties, present an interesting research subject and a challenging material to work with. As they constitute a significant portion of the overburden in most currently ... -
A Geometallurgical Approach Applied to the Tromsdalen Calcite Operation
(Doctoral theses at NTNU;2020:161, Doctoral thesis, 2020)The motivation behind the thesis was to increase the knowledge and to expand the possibilities within industrial mineral mining, an important mining sector in Norway. This was done through extensive deposit study and an ... -
Geometallurgical Modelling of the Stjernøya Nepheline Syenite Mine
(Doctoral theses at NTNU;2019:385, Doctoral thesis, 2019)The present study applies the concept of geometallurgy to an industrial mineral case study. Geometallurgy is a holistic discipline conveying different aspects of geology, mineral processing and mining together to improve ... -
Geophysical Mapping and Paleomagnetic Study of the Leka Ophiolite Complex
(Doctoral theses at NTNU;2019:32, Doctoral thesis, 2019)This thesis presents the results of a geophysical study of the Leka Ophiolite Complex (LOC) in central Norway, carried out to refine the understanding of the LOC’s sub surface geometry, fault structure and structural ... -
Geophysical mapping of the mafic and ultramafic rocks of the Seiland Igneous Province from the kilometer to the micrometer scale
(Doctoral theses at NTNU;2018:328, Doctoral thesis, 2018)The Seiland Igneous Province (SIP) is the largest complex of mafic and ultramafic intrusions in northern Norway, and one of the best preserved deep-seated magmatic plumbing systems in the world. The province, generated ... -
Geophysical Monitoring of CO2 Injection in Saline Aquifers
(Doctoral thesis at NTNU;2014:267, Doctoral thesis, 2014)Carbon capture and storage (CCS) is a prerequisite to meet the internationally agreed upon target of limiting the emissions of CO2. The international energy agency has a goal that CCS should cover 14% of the CO2 emission ... -
Ground source energy in crystalline bedrock - increased energy extraction by using hydraulic fracturing in boreholes
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:161, Doctoral thesis, 2004)The use of improved equipment and methodology can result in considerable reductions in the drilling costs for medium- to large sized ground source heat pump system in crystalline bedrock. The main point has been to use ... -
Groundwater heat pump systems. New insights on system design and on fluid flow in unconsolidated aquifers
(Doctoral theses at NTNU;2021:336, Doctoral thesis, 2021)This PhD thesis concerns groundwater heat pump (GWHP) systems in Norway, which are systems that utilize groundwater as a source of thermal energy for heating and cooling applications in buildings. GWHP systems can typically ... -
Groundwater quality of crystalline bedrock aquifers in Norway
(Dr. ingeniøravhandling, 0809-103X; 2002:53, Doctoral thesis, 2002)In cooperation with the Geological Survey of Norway, the Norwegian Radiation Protection Authority, and local health authorities, 1604 groundwater samples collected from Precambrian and Palaeozoic crystalline bedrock aquifers ... -
High-pressure experiments with application to naturally fractured chalk reservoirs
(Dr. ingeniøravhandling, 0809-103X; 1992:97, Doctoral thesis, 1992) -
Hole Cleaning and Mechanical Friction in Non-Circular Wellbore Geometry
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:88, Doctoral thesis, 2014)Drilling is one of the most important cost drivers in the finding and development of oil and gas fields. More efficient drilling reduces the overall costs and enables drilling of longer wells to reach new reservoir targets. ... -
Holistic flow and pressure control for underbalanced drilling operations
(Doctoral theses at NTNU;2016:333, Doctoral thesis, 2016)This text is targeted towards engineers and researchers working with drilling automation. Though the selected application domain is underbalanced drilling (UBD) the results are applicable to managed pressure drilling ... -
Hydrocarbon migration modelling and exploration risk
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:145, Doctoral thesis, 2004) -
HyGreGel: A new class of gel systems for water diversion by in-depth reservoir placement
(Doctoral theses at NTNU;2019:336, Doctoral thesis, 2019)High water production is typically a major problem late in the life cycle of a water flooded hydrocarbon reservoir. Reservoir heterogeneity plays a significant role in creating this problem. An example is highly permeable ... -
Implications of Gas Hydrates in Drilling and Completion A Scientific Root Cause Analysis of the Deepwater Horizon Disaster
(Doctoral theses at NTNU;2020:119, Doctoral thesis, 2020)On April 20, 2010 eleven men lost their lives in the explosion and fire on Deepwater Horizon. Previous investigations have assumed that the experienced drilling crew must have missed a cumulative gain of about 1 000 barrels ... -
Improving Volumetric Sweep Efficiency by Optimizing Viscous-Gravity Forces in Water-Miscible Gas Injection
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:102, Doctoral thesis, 2014)Water-alternating-gas injection is an enhanced oil recovery method that has been used for many years. Field applications of this method had good performance and the recovery factor was quite promising in the majority of ... -
Influence of Groundwater on Measurements of Thermal Properties in Fractured Aquifers
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:113, Doctoral thesis, 2012)Shallow boreholes equipped with borehole heat exchangers (BHE) connected to ground-coupled heat pumps are used for the heating and cooling of buildings. Accurate estimates of ground properties are essential to properly ... -
Integrated geophysical modelling and tectonic evolution of the western Barents Sea
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:267, Doctoral thesis, 2009) -
Integrated petrophysical study with emphasis on applicability of the NMR log to interpret fluid saturation and movability : a case study of a complex carbonate reservoir from the Barents Sea
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:326, Doctoral thesis, 2012) -
Integration of Electromagnetic and Seismic data to improve sub-salt and sub-basalt imaging
(Doctoral theses at NTNU;2021:147, Doctoral thesis, 2021)This thesis investigates how the marine Controlled Source Electromagnetic (CSEM) method and the marine MagnetoTelluric (MT) method can be used in combination for subsurface imaging in the presence of basalt and salt. A ...