Blar i Institutt for geovitenskap og petroleum på tittel
Viser treff 390-409 av 2544
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Characterisation of pyrrhotite-bearing concrete aggregates using conventional techniques in combination with SEM-based Automated Mineralogy
(Master thesis, 2021)Magnetkis i betongtilslag har fått økt oppmerksomhet de siste årene grunnet potensielt skadelige effekter på betongs bestandighet. Deler av overskuddsmassene fra tunnelbyggingen ved Follobanen var tiltenkt å gjenbrukes i ... -
Characterisation of the Magnetic Mineralogy, Properties and Magnetic Anomaly Responses of two Garnetiferous Peridotite Bodies in the WGR, Otrøya: Ground Magnetic Surveying, Sampling, Magnetic Characterisation and 2D Modelling
(Master thesis, 2014)Information on magnetisation of earth s crust comes from the study of magnetic anomalies measured at various elevations using ground, airborne and satellite data, as well as studies of deep-seated rocks exposed at the ... -
Characterisation of the stormwater in The Bryggen catchment: A thorough study of Norwegian urban pollutants and its impact on decomposition of archaeological remains
(Master thesis, 2013)Increased urbanization leads to more impermeable surfaces.Togther with climate changs with more intensive precipitation, more frequent urban floodings should be expected in the near future. As undreground convey systems ... -
Characterization of channel complex bodies along the pinch-out strata with respect to the growing salt anticline using 3D seismic interpretation from Lower Congo Basin.
(Master thesis, 2014)The increasing number of recently acquired 3D seismic surveys over large areas of passive margin settings has led to considerable advances in the comprehension of deep-water depositional systems (Fonnesu, 2003).In this ... -
Characterization of channels along lateral pinch out with respect to the growing salt anticline using 3D seismic interpretation from Lower Congo Basin.
(Master thesis, 2014)Abstract Extensive 3D seismic data from the Lower Congo Basin, offshore Angola, have been used to investi-gate the influence of salt-related structures on the location, geometry and evolution of deepwater depositional ... -
Characterization of Early Triassic Griesbachian intervals from wellbore cores 6611/09-U-01 and 6611/09-U-02 in the Helgeland basin, offshore Mid-Norway
(Master thesis, 2018)Cores 6611/09-U-01 and 6611/09-U-02 from the Helgeland basin cover a 750-metre-thick succession of marine sandstone, turbidites and shales. The upper 400 metres of the drilled cores are dated as the lower Triassic and ... -
Characterization of gas-lift instabilities
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:56, Doctoral thesis, 2005)This dissertation mainly investigates the occurrence and characteristics of density-wave instability in gas-lift wells. The investigation is based on a simplified gas-lift system, in which water and air are used as producing ... -
Characterization of large-magnitude normal faults in seismic reflection data: manual and automatic approaches
(Master thesis, 2020)Bruken av maskinlæring i forkastningstolkninger er utstrakt, men fokuset har primært vært på vanlige forkastningstyper som definerer reservoarer. Forkastninger av større skala skiller seg ofte ut fra disse vanlige ... -
Characterizing the acoustic properties of the cavity cloud generated close to an air-gun array as a time-dependent effective medium
(Journal article, 2018)A ghost cavity cloud consists of many small vapour cavities and appears above and around the air-guns in the source array a few milliseconds after the source is fired. Since there are dissolved gases and stable microbubbles ... -
Characterizing the dynamics of groundwater flow in alosing stream
(Master thesis, 2011)For quantitative reasons, drinking water wells are often located close to rivers, resulting ina large fraction of freshly infiltrated river water in the extracted water. Rivers bear the riskof being contaminated, e.g. by ... -
Chemical and magnetic properties of rapidly cooled metastable ferri-ilmenite solid solutions - IV: The fine structure of self-reversed thermoremanent magnetization
(Journal article; Peer reviewed, 2014)Magnetic experiments, a Monte Carlo simulation and transmission electron microscopy observations combine to confirm variable chemical phase separation during quench and annealing of metastable ferri-ilmenite compositions, ... -
Chemical and magnetic properties of rapidly cooled metastable ferri-ilmenite solid solutions: II. Chemical changes during quenching and annealing
(Journal article; Peer reviewed, 2012)Chemical and microstructural evolution during quench and short-term annealing of a sample XFeTiO3= 0.61 is explored in the light of observations in Paper I. Ordering proceeds by (1) random appearance of ordered and ... -
Chemical and magnetic properties of rapidly cooled metastable ferri-ilmenite solid solutions: implications for magnetic self-reversal and exchange bias - III. Magnetic interactions in samples produced by Fe-Ti ordering
(Journal article; Peer reviewed, 2012)Paper II of this series described the chemical and microstructural evolution of ferri-ilmenite solid solutions during high-T quench and short-term annealing. Here we explore consequences of these Fe–Ti ordering-induced ... -
The chemistry of quartz in granitic pegmatites of southern Norway: Petrogenetic and economic implications
(Peer reviewed; Journal article, 2015)Trace element concentrations in quartz from 188 granitic pegmatites in the Froland and Evje-Iveland pegmatite fields, southern Norway, have been determined to establish exploration targets for high-purity quartz and to ... -
Circulating out minor influxes through open riser during dual gradient drilling with a partly evacuated riser
(Master thesis, 2012)Today, with conventional drilling technology, the cost of drilling deep and ultra-deepwater wells is very high, thus many reservoirs are classified as non-economical. Some reservoirs may also be impossible to reach with ... -
Classification and analysis of systems for Managed Pressure Drilling (MPD)
(Master thesis, 2010)Today, the petroleum industry faces more and more prospects that are technically impossible and economically unfeasible to drill with conventional methods. This is due to depletion of old reservoirs and increased water ... -
Classification of flotation frothers
(Journal article; Peer reviewed, 2018)In this paper, a scheme of flotation frothers classification is presented. The scheme first indicates the physical system in which a frother is present and four of them i.e., pure state, aqueous solution, aqueous solution/gas ... -
Classification of Icelandic Aggregates and Effect on Concrete Properties
(Master thesis, 2020)Tilslag er volummessig den største bestanddelen i betong og har stor påvirkning på betongens egenskaper. Naturlige sand- og grusforekomster er en begrenset ressurs i verden, og det er av avgjørende betydning å kjenne til ... -
Classifying Lithofacies from Textural Features in Whole Core CT-Scan Images
(Peer reviewed; Journal article, 2021)X-ray computerized tomography (CT) is a nondestructive method of providing information about the internal composition and structure of whole core reservoir samples. In this study we propose a method to classify lithology. ... -
Close range interactions between air guns
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:293, Doctoral thesis, 2013)