Institutt for geovitenskap og petroleum: Recent submissions
Now showing items 61-80 of 2530
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Hydraulic Transient Impact on Surrounding Rock Mass of Unlined Pressure Tunnels
(Peer reviewed; Journal article, 2023)The frequent pressure pulsations due to hydraulic transients in hydropower plants induce cyclic loading on the rock mass that may contribute to increased instances of block falls and increased risk of tunnel collapse over ... -
An Invitation on Characterization of H<inf>2</inf>-Reduced Bauxite Residue and Recovering Iron through Wet Magnetic Separation Processes
(Peer reviewed; Journal article, 2023)Recovering iron from the bauxite residue (BR) is one of the long-standing challenges in the mining industry. However, there is a substantial lack of information in the literature regarding sample properties and iron ... -
An Investigation on Reduction of Calcium Added Bauxite Residue Pellets by Hydrogen and Iron Recovery through Physical Separation Methods
(Peer reviewed; Journal article, 2023)This study investigates the properties of H2-reduced calcium-added bauxite residue, self-hardened pellets, and the feasibility of iron recovery through electrostatic and magnetic separation methods. The oxide pellets are ... -
MyI-Net: Fully Automatic Detection and Quantification of Myocardial Infarction from Cardiovascular MRI Images
(Peer reviewed; Journal article, 2023)Myocardial infarction (MI) occurs when an artery supplying blood to the heart is abruptly occluded. The “gold standard” method for imaging MI is cardiovascular magnetic resonance imaging (MRI) with intravenously administered ... -
Automated Mineralogy and Diagnostic Leaching Studies on Bulk Sulfide Flotation Concentrate of a Refractory Gold Ore
(Peer reviewed; Journal article, 2023)Obtaining detailed and precise information from a classified refractory gold ore has been a long-standing challenge in mineral processing and process mineralogy. Although the concept of diagnostic leaching has been extensively ... -
Systematic Study of Wettability Alteration of Glass Surfaces by Dichlorooctamethyltetrasiloxane Silanization - A Guide for Contact Angle Modification.
(Peer reviewed; Journal article, 2023)To investigate the effects of wettability on multiphase flow in porous media, glass bead packs or micromodels are commonly used. Their wettability can be altered by the surface treatment method–silanization. Although ... -
Image-based and risk-informed detection of Subsea Pipeline damage
(Peer reviewed; Journal article, 2023)As one of the most important assets in the transportation of oil and gas products, subsea pipelines are susceptible to various environmental hazards, such as mechanical damage and corrosion, that can compromise their ... -
Bubble Formation and Motion in Liquids—A Review
(Journal article; Peer reviewed, 2023)In flotation, a bubble acts as a carrier for attached particles. The properties of the gas–liquid interface of the bubble are one of the main factors determining the bubble motion and flotation efficiency. Monitoring of ... -
Sensitivity Wellbore Geometry Analysis of an Integrated Production Modelling Asset for a North Sea Conceptual Reservoir Model
(Master thesis, 2023)Valget av brønnhullsgeometri og diameter spiller en avgjørende rolle for effektiv utvinning av hydrokarboner fra reservoarer, siden det direkte påvirker strømningsoppførselen og den endelige produksjonsytelsen. Den optimale ... -
GIS-analyse av terrengendringer i kvikkleirefarlige områder med eksempler fra Trøndelag
(Master thesis, 2023)I Norge har det gått en rekke kvikkleireskred gjennom historien. Noen av disse har knapt vært merkbare, mens andre har fått katastrofale følger. Gjerdrumskredet i 2020 er et eksempel på det siste, da det resulterte i store ... -
A Space Reduction Heuristic for Thermal Unit Commitment Considering Ramp Constraints and Large-Scale Generation Systems
(Peer reviewed; Journal article, 2023)This paper expands the research around a recently proposed method to reduce the search space region for thermal unit commitment problems. The importance of such techniques comes from the combinatorial explosion regarding ... -
Adsorptive Removal Behavior of Pb (II) and Cr (VI) Pollutants from an Aqueous Environment onto Polyaniline-Modified MIL100(Fe)
(Peer reviewed; Journal article, 2023)The present work introduces a new sorbent, so-called PANI/MIL100(Fe), for removing Pb (II) and Cr (VI) from wastewater. The successful preparation of PANI/MIL100(Fe) was verified via Fourier-transform infrared spectroscopy ... -
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 ... -
Evaluation of the Effects of Coal Jigging by Means of Kruskal–Wallis and Friedman Tests
(Peer reviewed; Journal article, 2023)Coal beneficiation processes are often based on gravitational enrichment techniques. Therefore, various types of jigs are often used in this area. A number of factors determine the quality of the final product. Therefore, ... -
Injeksjon i urbane tunneler
(Master thesis, 2023)Denne masteroppgaven presenterer prosjektet Sandbukta-Moss-Såstad, som er en del av InterCity utbyggingen på Østlandet. I dette prosjektet bygges det to tunneler, Mossetunnelen og Carlbergtunnelen. Disse tunnelene går ... -
Data-Driven Optimization of Multiple Gas-Lifted Wells by Using Extremum Seeking Control
(Master thesis, 2023)Denne oppgaven utforsker anvendelsen av Extremum Seeking Control (ESC) for å optimalisere gassløfteoperasjoner i olje- og gassindustrien. Gassløft er en mye brukt kunstig løftemetode som øker produksjonshastigheten til ... -
Advanced Simulation of Quartz Flotation Using Micro-Nanobubbles by Hybrid Serving of Historical Data (HD) and Deep Learning (DL) Methods
(Peer reviewed; Journal article, 2023)The present study investigates the optimization and advanced simulation of the flotation process of coarse particles (–425 + 106) using micro-nanobubbles (MNBs). For this purpose, flotation experiments in the presence and ... -
Integrated Boundary Conditions and HPC schemes for enhanced Viscoacoustic Modeling
(Master thesis, 2023)Denne oppgaven presenterer en omfattende undersøkelse av den viskoakustiske bølgeligningen, med fokus på Absorberende grenseforhold og høyytelsesberegning. Vi viser at C-PML-grenseforholdene tilsvarer en Standard Linear ... -
Model-Based Gas Lift Optimization for Oil Well Networks Using Python and PROSPER Well Models
(Master thesis, 2023)In the oil industry, continuous flow gas lift is a frequently employed artificial lift technique to boost oil recovery by decreasing bottom hole pressure. By injecting high-pressure gas into the tubing, the oil column can ... -
Provenance of the Neoproterozoic–Cambrian Vestertana Group in Finnmark, northern Norway
(Master thesis, 2023)Detritalzirkonstudier kan bidra til å bestemme paleogeografi, tektoniske rekonstruksjoner og jordskorpeutvikling. Zirkon benyttes populært i sedimentære provenansstudier på grunn av sin robusthet og tilstedeværelse i så ...