Now showing items 21-40 of 99

    • Origin and accumulation mechanism of shallow gas accumulations in the SW Barents Sea 

      Kjerkreit, Kristian (Master thesis; Mastergradsoppgave, 2014-06-02)
      Events associated with shallow gas accumulations are reported all over the Norwegian continental shelf. These accumulations are potentially dangerous geo-hazards related to drilling activity, but they can also be of economic interest if the accumulated volumes are large. Petroleum in the Barents Sea has been influenced by the late periods of uplift and erosion creating a complex province. The exact ...
    • Short-term wind power prediction based on Markov chain and numerical weather prediction models: A case study of Fakken wind farm 

      Jacobsen, Morten (Master thesis; Mastergradsoppgave, 2014-06-02)
      Rising energy demands and a growing focus on sustainable development have made electricity production from wind energy an attractive alternative to fossil fuels. However the natural variability of wind makes it challenging to implement wind energy into the electrical grid. Accurate and reliable wind power predictions are seen as a key element for an increased penetration of wind energy. This ...
    • Ocean modeling in Northern Norway: A tidal verification study 

      Djuve, Hans Kristian (Master thesis; Mastergradsoppgave, 2014-06-02)
      The coast of Northern Norway has for the first time been modeled using an unstructured grid. The modeling is done using two separate grids of different resolution, and the model data is compared to measurements done along the coast to verify its performance for both the fine and coarse grid. The model is a 2-D depth integrated model of tidal circulation with bottom friction. The data have been ...
    • Focused fluid flow through the gas-hydrate stability zone on the Vestnesa Ridge, offshore W-svalbard 

      Aas, Cecilie (Master thesis; Mastergradsoppgave, 2014-07-17)
      Abstract: Numerous unburied seafloor pockmarks are related to current methane-leakage at Vestnesa Ridge (~79° N), west of Svalbard. About 50 km long and 1-3 km wide, Vestnesa Ridge is a 1-2 km thick sediment drift to the north of the active Molloy transform – on the eastern spreading segment. With its crest at 1200-1300 m depth, the ridge is located on young (<19.6 Ma) oceanic crust. The entire ...
    • The nature of the gas-hydrate/free gas transition zone at the base of the hydrate-stability zone from high-resolution 3D seismic data 

      Bjørnøy, Kirsti (Master thesis; Mastergradsoppgave, 2015-01-26)
      Geophysical evidence of a prominent BSR at Vestnesa Ridge and north to the northern flank of the Storegga slide escarpment infer that gas hydrates are ubiquitous within these regions. A wide range of fluid flow structures have previously been discovered from these regions, as well as gas seepage activity from pockmarks on the eastern segment of Vestnesa Ridge. This paper focuses on high-resolution ...
    • A detailed investigation of a geological CO2-storage reservoir 

      Hatland, Anna Maria (Master thesis; Mastergradsoppgave, 2015-05-31)
      Increased CO2-concentrations within the atmosphere of the Earth have encouraged development of “carbon capture and storage” (CCS). It is important to avoid global warming, and CO2 may be stored within geological formations in the subsurface. This thesis focuses on the possibilities of storing CO2 in a reservoir of Middle Triassic-Middle Jurassic age in The Nordkapp Basin, The Southern Barents ...
    • Reservoir structure and geological setting of the shallow PEON gas reservoir 

      Mikalsen, Håkon (Master thesis; Mastergradsoppgave, 2015-06-01)
      In recent years, the petroleum industry started to look for new, unconventional energy resources. Peon, a shallow gas discovery in the northern North Sea, are being assessed as a possible energy resource. However, there are challenges related to reservoir pressure, sealing mechanism, and fluid migration. In this regard, geophysical and well log analyses is figured out to get a better understanding ...
    • RAM analysis of mining equipment and framework for data collection 

      Sneve, Terje (Master thesis; Mastergradsoppgave, 2015-06-01)
      In the mining industry, equipment are continuously increasing in size and complexity. At the same time, the demand for available plants and continuous production has never been higher. The performance of equipment depends on the reliability and maintainability performance of the equipment along with the maintenance supportability, operational conditions, and environmental conditions. In order to ...
    • Evaluation of probability of failure of static equipment in pressurized mud systems on an offshore drilling installation 

      Rød, Bjarte (Master thesis; Mastergradsoppgave, 2015-06-01)
      Degradation of pressurized topside static mud equipment is a very complex process. Inspection is a helpful tool to monitor degradation and helps reduce the number of critical failures. If it is left undetected and unchecked, it can lead to leakage resulting in accidents. To set up an effective inspection program, the concepts of Risk-Based Inspection (RBI) can be utilized. RBI helps to develop an ...
    • Risk analysis of well control operations considering Arctic environmental conditions 

      Bergan, Håvard Hegg (Master thesis; Mastergradsoppgave, 2015-06-01)
      Oil and gas development in the Arctic is becoming a major focus in the industry today. However, compared to other regions, there is less experience regarding drilling operations in the Arctic environment. This fact raises concerns about high-risk scenarios, which might take place because of the harsh environmental conditions and the effects they have on various phases of operations, equipment and ...
    • A study of the potential improvement of Sydvaranger Gruve´s process water treatment through experiments with different flocculants and coagulants 

      Floer, Ida Katrine (Master thesis; Mastergradsoppgave, 2015-06-01)
      Mining is the process or industry of extracting valuable minerals or other geological materials from the earth. The nature of mining creates a potential negative impact on the environment both during the mining operations and several years after the mine is closed. Over the years regulations designed to moderate the negative effects are adopted, and environmental issues and challenges have ...
    • QRA techniques on dynamic positioning systems during drilling operations in the Arctic: With emphasis on the dynamic positioning operator 

      Pedersen, Runar Nikolai (Master thesis; Mastergradsoppgave, 2015-06-01)
      With the Norwegian government moving the ice edge farther north than ever before, opening for new areas for petroleum exploration, it will need research on how these areas can affect oil and gas operations. A sensitive environment along with the harsh Arctic climate and remote distances means that severe accidents, like blowouts, will have serious impacts and make cleanup and rescue actions to ...
    • Modeling of seismic amplitude anomalies associated with CO2 underground storage 

      Nordahl, Janita Louise (Master thesis; Mastergradsoppgave, 2015-06-01)
      Higher amounts of CO2 in the atmosphere has contributed to finding techniques to mitigate the emissions of CO2. One of those techniques is Carbon Capture and Storage (CCS). CO2 can be stored in subsurface reservoirs over time. Monitoring and modeling of reservoirs is important to avoid leakage and to predict how the CO2 could migrate. Modeling is also useful when the seismic interpreter has problems, ...
    • Ship detection products based on complex SAR data in TOPS mode 

      Myrnes, Marianne (Master thesis; Mastergradsoppgave, 2015-06-01)
      With the increasing need for monitoring ship traffic in both coastal and open oceans, ship detection is an important application of synthetic aperture radar (SAR). This thesis investigates image products suitable for ship detection for complex data acquired in Terrain Observation by Progressive Scans (TOPS) mode. The research was based on studying how contrast enhancement algorithms suitable for SLC ...
    • Fast estimation of ocean background reflectivity in synthetic aperture radar images 

      Nylehn, Tina Eliassen (Master thesis; Mastergradsoppgave, 2015-06-02)
      Several ship detection algorithms have been developed over the years, where some of the most commonly used are the constant false alarm rate (CFAR) algorithms. There are challenges to the existing algorithms, both when it comes to processing time and difficult scene situations, such as heterogeneous ocean clutter and multiple targets. Existing algorithms that are equipped to handle situations ...
    • Synthetic aperture radar compact polarimetry for sea ice surveillance 

      Espeseth, Martine Mostervik (Master thesis; Mastergradsoppgave, 2015-06-26)
      The focus of this thesis is to investigate the use of synthetic aperture radar (SAR) compact polarimetry for studies of sea ice. Data obtained from quad-polarimetric SAR systems have already been studied extensively for sea ice monitoring. This thesis focuses on finding parallels to quad-polarimetric features from the compact-polarimetric data. This is achieved through the reconstruction of a pseudo ...
    • Structural and Stratigraphic Setting and Fluid Flow Features of the Svyatogor Ridge, a Sediment Drift South of the Molloy Transform 

      Westvig, Ingvild Myrvang (Master thesis; Mastergradsoppgave, 2015-07-01)
      High-resolution two-dimensional (2D) multichannel seismic data was acquired in 2014 from the Svyatogor Ridge, a sediment drift on the northwestern flank of the Knipovich spreading ridge. Seismic data is here processed, and together with multibeam bathymetry data and a correlation with Ocean Drilling Program (ODP) Hole 909, an interpretation of the structural and stratigraphic framework of the Svyatogor ...
    • Shallow fluid seepage systems in the Hammerfest Basin and adjacent Fault complex 

      Tesfay, Yohannes (Master thesis; Mastergradsoppgave, 2015-08-12)
      This study was carried out using three high resolution 3D P-cable seismic datasets to explore shallow gas distribution and possible fluid migration pathways in the Snøhvit field and Ringvassøy-Loppa Fault Complex. The Snøhvit field situated in the center of the Hammerfest Basin is oil and gas field discovered in 1994. Ringvassøy-Loppa Fault complex marks the border between the Hammerfest and Tromsø ...
    • Fluid flow features and gas hydrates in the outer Vøring Basin 

      Varjola, Carita E. Eira (Master thesis; Mastergradsoppgave, 2015-12-15)
      The 3D seismic survey ST0827 in the outer Vøring Basin reveals a complex fluid flow system consisting of hydrothermal vents, polygonal faults and acoustic pipes. The polygonal faults are bound to the fine-grained Top Brygge Formation and ooze-dominated Kai Formation. The Kai Formation is overlain by the Naust Formation, in which glacigenic debris flow units are observed. As polygonal faults can be ...
    • Possible gas hydrates on the Bjarmeland Platform; seismic expression and stability modelling 

      Løvaas, John Sverre (Master thesis; Mastergradsoppgave, 2016-05-24)
      Seismic evidence of shallow gas anomalies are prominent at Ververis Dome structure and Hoop Fault Complex in Bjarmeland Platform. Ubiquitous high amplitude anomalies at the same depth as these shallow gas anomalies infer a possible relation to gas hydrates. A wide range of fluid flow structures within the two study areas have previously been discovered and reported, and may possibly feed the base ...