Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 3830-3849 of 9919
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Hydratdannelse og metanproduksjon fra gasshydrat - produksjonsmetoder og resistivitetsutvikling
(Master thesis, 2009-11-20)Ved høye trykk og lave temperaturer kan vannmolekyler danne strukturelle bur rundt et gjestemolekyl. Denne substansen er da i fast form og kalles hydrat. I naturlig forekomst av gasshydrat er metan det vanligste gjestemolekylet. ... -
Hydrate Formation and CH4 Production from Natural Gas Hydrates - Emphasis on Boundary Conditions and Production Methods
(Master thesis, 2009-05-13)Natural gas hydrate is a solid state of gas and water at low temperature and high pressure. Gas hydrates are known to form hydrate plugs in production line, and has thus generally been considered a problem to the oil ... -
Hydrate formation and CO2 - CH4 exchange in sandstone - An experimental study with emphasis on the role of initial brine saturation and salinity
(Master thesis, 2013-06-01)Recent research activity has demonstrated the viability of producing methane from gas hydrate bearing sediments by injecting and sequestering CO2 in a process where CO2 replace methane in gas hydrate by a process called ... -
Hydrate Monitoring using Capacitive Sensors
(Master thesis, 2013-06-02)Gas hydrates are of particular interest in petroleum industry since their formation during oil-production can be a major risk factor. Gas hydrates can block pipelines, interrupt production, and in worst case even cause ... -
Hydrate Nucleation, Growth, and Induction
(Journal article; Peer reviewed, 2020)The first stage of any phase transition is a dynamic coupling of transport processes and thermodynamic changes. The free energy change of the phase transition must be negative and large enough to also overcome the penalty ... -
Hydrate Phase Transition-Risk, Energy Potential and CO2 Storage Possibilities
(Doctoral thesis, 2022-02-11)Natural gas hydrate (NGH) can cause crucial flow assurance problems to the oil and gas industry. It is being considered as a potential vast energy resource for the world in the future. It could also potentially provide a ... -
Hydrate Plugging and Flow Remediation during CO2 Injection in Sediments
(Journal article; Peer reviewed, 2020)Successful geological sequestration of carbon depends strongly on reservoir seal integrity and storage capacity, including CO2 injection efficiency. Formation of solid hydrates in the near-wellbore area during CO2 injection ... -
Hydrate Production Philosophy and Thermodynamic Calculations
(Journal article; Peer reviewed, 2020)The amount of energy in the form of natural gas hydrates is huge and likely substantially more than twice the amount of worldwide conventional fossil fuel. Various ways to produce these hydrates have been proposed over the ... -
Hydro-mechanical simulation and analysis of induced seismicity for a hydraulic stimulation test at the Reykjanes geothermal field, Iceland
(Journal article; Peer reviewed, 2021)The combination of seismic analysis with advanced physics-based simulation provides an opportunity to further understand injection-induced fault reactivation, including the hydro-mechanical interplay between different ... -
Hydrocarbon migration in the Utsira High area
(Master thesis, 2021-01-29) -
Hydroclimate variability was the main control on fire activity in northern Africa over the last 50,000 years
(Journal article; Peer reviewed, 2022)North Africa features some of the most frequently burnt biomes on Earth, including the semi-arid grasslands of the Sahel and wetter savannas immediately to the south. Natural fires are fuelled by rapid biomass production ... -
Hydrodynamical studies of Quark Gluon Plasma: Collective behaviour, initial fluctuations and theoretical fundaments
(Master thesis, 2012-05-30)This master thesis focuses on collective behaviour of the Quark Gluon Plasma, created at the Large Hadron Collider at CERN. We calculate analytically and semi-analytically the transverse momentum and rapidity dependence ... -
Hydrodynamisk motstand og bølgerespons til forskjellige utforminger av et ubemannet overflatefartøy
(Master thesis, 2020-06-17) -
Hydroelectric Power in Present and Future Energy Systems
(Master thesis, 2013-06-03)To be able to understand the dynamics of energy systems, the interplay between a variety of factors affecting them has to be addressed. In this thesis, we look at issues like climate change, energy policy, power transmission, ... -
Hydrogen Consumption by Halophilic Microorganisms - Implications for Underground Hydrogen Storage
(Master thesis, 2023-06-01)Underground Hydrogen Storage (UHS) in reservoirs and caverns is a possible solution for large-scale and long-term storage of hydrogen (H2) in the subsurface. As the cost of tech- nology installation and electricity from ... -
Hydrogen Relative Permeability Hysteresis in Underground Storage
(Journal article; Peer reviewed, 2022)Implementation of the hydrogen economy for emission reduction will require storage facilities, and underground hydrogen storage (UHS) in porous media offers a readily available large-scale option. Lack of studies on ... -
Hydrogeologi og karstkorrosjon i Grønli-Seterakviferen, Mo I Rana
(Master thesis, 2002)Nykartlegging av grottesystemet ga en total lengde på 7,6 km (Grønligrotta – 4 100 m, Setergrotta – 3 020 m og Langgrotta-Isgrotta - 440 m). Den aktive akviferen under de tørrlagte grottene er undersøkt hovedsakelig ved ... -
Hydrography and circulation in the Filchner Depression, Weddell Sea, Antarctica
(Peer reviewed; Journal article, 2014)Cold and dense ice shelf water (ISW) emerging from the Filchner-Ronne Ice Shelf cavity in the southwestern Weddell Sea flows northward through the Filchner Depression to eventually descend the con- tinental slope and ... -
Hydrography in the Nordic Seas During Dansgaard-Oeschger Events 8-5
(Doctoral thesis, 2019-06-14)The modern rapidity of Arctic sea ice loss and rise in Arctic air and ocean temperatures is pushing research to understand mechanisms for abrupt climate fluctuations. Resolving the mechanisms of past abrupt changes is a ... -
Hydrography, circulation, and response to atmospheric forcing in the vicinity of the central Getz Ice Shelf, Amundsen Sea, Antarctica
(Journal article; Peer reviewed, 2022)Ice shelves in the Amundsen Sea are thinning rapidly as ocean currents bring warm water into the cavities beneath the floating ice. Although the reported melt rates for the Getz Ice Shelf are comparatively low for the ...