Blar i Institutt for geovitenskap og petroleum på tittel
Viser treff 1434-1453 av 2544
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Micro-Testing While Drilling for Rate of Penetration Optimization: Experiments and Simulations
(Peer reviewed; Journal article, 2021)The rate of penetration (ROP) is one of the key parameters related to the efficiency of the drilling process. Within the confines of operational limits, the drilling parameters affecting the ROP should be optimized to drill ... -
Microfluidics for Petroleum Reservoir Engineering Applications
(Master thesis, 2020)Polymer-coated silica nanoparticles (PSiNP) have been proposed for enhanced oil recovery (EOR) owing to their improved properties such as stability, emulsion formation, low retention, etc. over bare nanoparticles. Even ... -
Micromagnetic Modes of Anisotropy of Magnetic Susceptibility in Natural Magnetite Particles
(Peer reviewed; Journal article, 2022)Anisotropy of magnetic susceptibility (AMS) is commonly used to assess sedimentation, deformation, tectonics, rock fabric, and texture. Using focused-ion beam nanotomography, we develop a micromagnetic method to investigate ... -
Microscale Magnetic Inversion of Remanent Magnetization Mineral Sources From the Black Hill Norite, South Australia
(Peer reviewed; Journal article, 2023)Inverse modeling of regional-scale aeromagnetic data is complicated due to the non-uniqueness principle and interference of anomalies, especially with increased source-sensor separation. This is why in situ data and ... -
Middle to late Holocene paleoproductivity reconstructionsfor the western Barents Sea: a model-data comparison
(Journal article; Peer reviewed, 2015)In this study we focus on late Holocene primary productivity (PP) variability in the western Barents Sea and its response to variable sea ice coverage by combining PP reconstructed from several sediment cores with ... -
Migration Study of the Uranus Prospect in the Barents Sea: Evaluation of Velocity Sensitivity, Wave Equation Migration and Acquisition Geometry
(Master thesis, 2012)Imaging of salt is a known geophysical challenge, since salt has complex geology, with varying lithology and complicated structures. Salt diapir can have steep dips and obtaining a correct velocity models are some of the ... -
Million node fracture: size matters?
(Peer reviewed; Journal article, 2021)Transmissivity of self-affine fractures was computed numerically as a function of the grid size. One-million-node fractures (1024 × 1024 nodes) with fractal dimensions of 2.2–2.6 were cut into successively smaller fractures ... -
Mineral characterization as a tool in the implementation of geometallurgy into industrial mineral mining
(Journal article; Peer reviewed, 2018)Industrial minerals play an important role in the Norwegian mining industry. The presented research focuses on defining marble deposit variability in order to evaluate parameters that can potentially be related to downstream ... -
Mineral Magnetic Characterization of High-Latitude Sediments From Lake Levinson-Lessing, Siberia
(Peer reviewed; Journal article, 2021)Levinson-Lessing Lake in northern Central Siberia is a sedimentary archive characterized by continuous, widely constant sedimentation at high rates (0.7 m ka−1 for >32 ka). This study provides the first evidence of the ... -
Mineralogical and textural characterization for increased iron oxide recovery. Exemplified on the Storforshei iron formation
(Doctoral theses at NTNU;2019:309, Doctoral thesis, 2019)Process mineralogy is increasingly becoming an important part of quality control in mining operations, and chemical assays are not sufficient for predicting metallurgical performance of complex ore deposits. Knowledge of ... -
Mineralogical assessment of rocks of hydropower tunnels subjected to swelling
(Master thesis, 2022)Vannkraft tunneler lokalisert i svakt og svellende bergmasse er utsatt for stabilitets problemer og kollaps. Samarbeidspartneren Statkraft ønsker å støtte videre forskning som skal identifisere og vurdere svellende mineraler ... -
Mineralogiens betydning for materialbalansen i ulike produktstrømmer ved prosessanlegget til Rana Gruber
(Master thesis, 2018)er enda ikke skrevet -
Mineralogiens betydning for materialbalansen i ulike produktstrømmer ved prosessanlegget til Rana Gruber
(Master thesis, 2019)Dette masterprosjektet ble gjennomført i samarbeid med Rana Gruber for å skaffe innsikt i mineralbalanser i oppredningsprosessen deres for hematitt. Som del av oppgaven ble det tegnet opp et forenklet flytskjema for ... -
Mineralogy and texture of the Storforshei iron formation, and their effect on grindability
(Journal article; Peer reviewed, 2018)Investigating how ore mineralogy and texture affect the recovery from the processing plant is important for any mining operation. The results will assist in production planning and optimising the utilisation of a deposit. ... -
Minimizing Risk by Determining A Safe Mud Weight Window for Offshore Wellbore Construction
(Journal article; Peer reviewed, 2020)Increased requirements for uncertainty analysis have caused a shift in sensitivity assessment, from a deterministic approach to a stochastic process. To ensure wellbore integrity, it’s essential to conduct breakout and ... -
Mining Ground Deformation Estimation Based on Pre-Processed InSAR Open Data—A Norwegian Case Study
(Journal article; Peer reviewed, 2023)Sublevel caving mining causes surface deformation in three distinct zones parallel to the extracted deposit. Most of the published research is focused on the extent of the caved and fracture zones. The extent of the largest, ... -
Mining of deep-seabed nodules using a Coandă-effect-based collector
(Peer reviewed; Journal article, 2023)We present an effective design of a hydraulic, polymetallic nodule collector, which fundamentally depends on the Coandă effect in harvesting nodules. The design was first developed based on 2D numerical simulations conducted ... -
Mitigating Axial Stick-Slip During Connections on a Floating Vessel
(Master thesis, 2020)Det finnes få gode løsninger for å hindre et fluktuerende bunnhullstrykk under koblinger på en flyterigg. MPD-teknologi gjør det mulig å holde et stabilt trykk, men bare dersom borestrengens bevegelse er forutsigbar. Under ... -
Mixing of heterogeneous, high-MgO, plume-derived magmas at the base of the crust in the Central Iapetus Magmatic Province (Ma 610-550): Origin of parental magmas to a global LIP event.
(Peer reviewed; Journal article, 2020)High-MgO (>12 wt%) magmas represent some of the most primary and high temperature melts from mantle plumes. The compositional diversity of high-MgO magmas gained by fractional melting within inhomogeneous mantle sources, ... -
Model for evaluating drilling efficiency based on the concept of Mechanical Specific Energy
(Master thesis, 2016)Systems to increase efficiency during drilling is desirable in order to have more costeffective well operations. This master s thesis studies the possibility to present new information real-time regarding the actual drilling ...