Browsing Institutt for geovitenskap og petroleum by Title
Now showing items 1605-1624 of 2529
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On the Importance of Expert Knowledge in Well Placement Optimisation
(Master thesis, 2016)As of today, well placement optimisation in field development planning is most commonly based on the trial-and-error approach that requires the evaluation of numerous field development scenarios. This approach is not ... -
On the Stability of Oil-Based Drilling Fluid: Effect of Oil-Water Ratio
(Chapter, 2020)Drilling fluids are complex mixtures of natural and synthetic chemical compounds used to cool and lubricate the drill bit, clean the wellbore, carry drilled cuttings to the surface, control formation pressure, and improve ... -
A one-step Bayesian inversion framework for 3D reservoir characterization based on a Gaussian mixture model-A Norwegian Sea demonstration
(Peer reviewed; Journal article, 2021)We have developed a one-step approach for Bayesian prediction and uncertainty quantification of lithology/fluid classes, petrophysical properties, and elastic attributes conditional on prestack 3D seismic amplitude-varia ... -
One-way wave-equation migration for wide-angle propagation in anisotropic media
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:140, Doctoral thesis, 2010)Seismic depth migration is a major component in the search for hydrocarbons. As new prospects for oil and gas often are found in areas with challenging subsurface structures, more advanced methods to find and evaluate these ... -
Online remote-controlled and cost-effective fouling and clogging surveillance of a groundwater heat pump system
(Peer reviewed; Journal article, 2021)Fouling and clogging of groundwater wells and heat exchangers are among the major operational challenges for groundwater heat pump (GWHP) and aquifer thermal energy storage (ATES) systems. This article presents the application ... -
Onshore to offshore correlation of ore-forming hydrothermal systems: Geological investigations of the Reinfjord Ultramafic Complex and Southwestern Barents Sea
(Doctoral theses at NTNU;2023:76, Doctoral thesis, 2023)Demand for mineral resources continues to grow, while political pressure, legitimate environmental concerns, and important ethical questions slow the development of new mineral resources. Simultaneously, emerging technologies ... -
Operation of Norwegian Hydropower Plants and Its Effect on Block Fall Events in Unlined Pressure Tunnels and Shafts
(Peer reviewed; Journal article, 2021)The main objective of this study is to investigate the effect of hydropower plant operation on the long-term stability of unlined pressure tunnels of hydropower plants in Norway. The authors analyzed the past production ... -
Operational Aspects of Sand Control
(Master thesis, 2010)Historically, means of sand control have been utilized in hydrocarbon recovery since before 1930. Guide lines for establishing a successful design and installation have been developing as a function of experience and better ... -
Operational Procedure for permanent P&A of Subsea Wells
(Master thesis, 2015)All oil-and gas wells ever drilled on the Norwegian continental Shelf will be abandoned at some point. The operating companies are entitled ensure no leaking to the surface from the reservoir in an eternal perspective ... -
Optimal Drilling and Completion of Deep ERD Wells
(Master thesis, 2013)In this Master Thesis well design for deepwater ERD wells have been reviewed. These wells present new challenges for the industry, which creates high demands for well design and materials. The constant push for deeper ... -
Optimal preventive policies for parallel systems using Markov decision process: application to an offshore power plant
(Journal article; Peer reviewed, 2023)This work proposes a Markov Decision Process (MDP) model for identifying windows of opportunities to perform preventive maintenance for multi-unit parallel systems subject to a varying demand. The main contribution lies ... -
Optimal time decay of the Boltzmann equation with frictional force
(Journal article; Peer reviewed, 2011)In this paper, we use the combination of energy method and Fourier analysis to obtain the optimal time decay of the Boltzmann equation with frictional force towards equilibrium. Precisely speaking, we decompose the equation ... -
Optimal utilisation of unbound crushed aggregates for road construction
(Doctoral thesis, 2020)Aggregates are construction materials produced from non-renewable rock resources. Because high-quality aggregate resources have limited availability, utilisation of aggregates should be considered carefully to prevent ... -
Optimal Well Inflow Modelling
(Master thesis, 2021)Horisontale brønner (HWs) er utplassert i hydrokarbonreservoarer for å øke reservoarets kontringsområde og dermed utvinning. Trykktap langs brønnens lengde, og reservoarets heterogenitet skaper en ubalansert brønninnstrø ... -
Optimalisering av kontraktstrategi for injeksjonsarbeider
(Master thesis, 2021)Injeksjon i berg er et veletablert prinsipp for å redusere innlekkasjen til bergrom i Norge. Likevel er manglende kunnskap og utilstrekkelige kontraktuelle hjelpemidler for å håndtere usikkerhet tilknyttet innlekkasjer, ... -
Optimalisering av tettestrategi for tunneler på Fornebubanen
(Master thesis, 2020)Abstract will be available on 2023-06-10 -
Optimisation of Intelligent Wells in a Reservoir Simulation Model - Part 2
(Master thesis, 2010)This work is the second part of a project to investigate what is possible in terms of control and optimization of a multi-lateral well within a greater field model, using the proprietary reservoir simulator Eclipse. In ... -
Optimization and engineering geological evaluation of headrace tunnel system of Akavreta HPP in Georgia
(Master thesis, 2022)Current thesis is about designing and evaluating Akavreta HPP headrace tunnel system in Georgia. Akavreta HPP is 20 MW hydropower project located in Adjara region. There are three dams, which collect water from three ... -
Optimization and Stability Analysis of Waterway System and Underground Powerhouse Cavern for Himchuli Dordi HPP, Nepal
(Master thesis, 2018)Potential for hydropower development in Nepal is well established, and exploitation of the resource with economical and sustainable design is the need of the time. Unlined pressure tunnel is proven safe and economical ... -
Optimization Based Design of Subsea Processing Considering Reliability and Maintenance
(Master thesis, 2022)Undervannsteknologi gir mulighet for å utvikle små marginale felt som ofte har liten profittmargin og kort feltlevetid ved hjelp av kosteffektive løsninger. Det er derimot viktig at disse løsningene oppfyller kravene til ...