Institutt for geovitenskap og petroleum
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Permian-Triassic Depositional Systems in the Norwegian Sea Areas
(Doctoral theses at NTNU;2020:195, Doctoral thesis, 2020)Upper Permian deposits from the eastern margin of the Helgeland Basin, offshore Norway, are known to contain two organic-carbon-rich (OCR) intervals within the Lower Turbidite Unit. These intervals were so far not proven ... -
Application of Low-Salinity Waterflooding in Carbonate Cores: A Geochemical Modeling Study
(Peer reviewed; Journal article, 2020)Waterflooding is the most widely applied improved oil recovery technique. Recently, there has been growing interest in the chemistry and ionic composition of the injected water. Low-salinity waterflooding (LSWF) is a ... -
Novel reagent system in metal sulphide flotation
(Doctoral theses at NTNU;2020:214, Doctoral thesis, 2020) -
Comparing mechanical and ultrasonic behaviour of a brittle and a ductile shale: Relevance to prediction of borehole stability and verification of shale barriers
(Peer reviewed; Journal article, 2019)Borehole collapse during drilling operations in shale formations is a well-known and costly problem within the petroleum industry. Recently it has become evident that shales may also form sealing barriers around the casing, ... -
Numerisk simulering av avansert smartvanninjeksjon i et sandsteinreservoar på norsk kontinentalsokkel.
(Master thesis, 2020)Resultater fra kjerneflomforsøk for et sandsteinsreservoar på norsk kontinentalsokkel viste at vannflømming med lav saltholdig vann ikke førte til mer oljeutvinning. Det ble observert at konsentrasjonen og typen leirmineral ... -
Analysis on the extent of water inflow in the tunnel system of SmiSto Hydropower Project in Nordland
(Master thesis, 2020)SmiSto vannkraftprosjekt, som bygges ut ved Gjervalenfjorden i Nordland, er et nytt bidrag til vannkraftindustrien i Norge. Ved drivingen av tunnelsystemene har det vært betydelige problemer knyttet til innlekkasje av vann ... -
Determination of Dogleg Severity and Side Force for Stuck Pipe Prevention.
(Master thesis, 2019)A drill pipe is said to get stuck if it cannot be pulled out of the hole without damaging it and exceeding the maximum allowable hook load. Stuck pipe results from various causes such as excessive dogleg severity (DLS) and ... -
Service Line-Less Subsea Production and Injection
(Master thesis, 2020)I dag er de fleste subsea-felt utviklet med et elektro-hydraulisk kontrollsystem hvor en umbilical supplerer feltet med hydraulisk væske, kjemikalier, signaler og elektrisitet. Umbilicalen er en kostnadskrevende komponent ... -
Influence of silicate minerals on spontaneous imbibition of water within a porous medium.
(Master thesis, 2019)Klastiske (sandstein) sedimentære bergarter er vist seg å være omtrent 60% av all den produktive petroleumsreservoarer med sine viktige petrofysiske bergartsegenskaper er porøsitet og permeabilitet. Bergets fuktighetsforhold ... -
Fracture Assessment of Quasi-brittle Rock Simulated by Modified Discrete Element Method
(Journal article; Peer reviewed, 2020)New developments of an in-house hybrid code, named Modified Discrete Element Method (MDEM) are presented in the paper. The new developments are on the treatment of pre-existing and propagating fractures in quasi-brittle ... -
Late-magmatic immiscibility during batholith formation: assessment of B isotopes and trace elements in tourmaline from the Land’s End granite, SW England
(Peer reviewed; Journal article, 2015)Quartz–tourmaline orbicules are unevenly distributed in the roof segment of the Land's End granite, SW England. This study shows that the orbicules formed from an immiscible hydrous borosilicate melt produced during the ... -
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 ... -
Anatomy of a deep crustal volcanic conduit system; The Reinfjord Ultramafic Complex, Seiland Igneous Province, Northern Norway
(Peer reviewed; Journal article, 2016)The Reinfjord Ultramafic Complex, Seiland Igneous Province represents a lower crustal magma chamber (25–30 km depth) that likely records a deep conduit system for mantle derived melts ascending through the continental ... -
Geological setting, emplacement mechanism and igneous evolution of the Atchiza mafic-ultramafic layered suite in north-west Mozambique
(Peer reviewed; Journal article, 2015)The Atchiza mafic and ultramafic-layered suite (hereafter, “Atchiza Suite) crops out in an area 330 km2 west of the Mozambican Tete province. In an early account of the geology of this intrusion, it was considered the ... -
Crystallization and uplift path of late Variscan granites evidenced by quartz chemistry and fluid inclusions: Example from the Land's End granite, SW England
(Peer reviewed; Journal article, 2016)The megacrystic, coarse-grained granite of the Land’s End granitic complex, SW England, has been investigated by analyzing fluid inclusions, trace elements, and cathodoluminescence textures of quartz. By applying the TitaniQ ... -
X-ray Microprobe Investigation of Iron During a Simulated Silicon Feedstock Extraction Process
(Peer reviewed; Journal article, 2016)Elemental silicon is extracted through carbothermic reduction from silicon-bearing raw feedstock materials such as quartz and quartzites. We investigate the micron-scale distribution and valence state of iron, a deleterious ... -
A Geometallurgical Approach Applied to the Tromsdalen Calcite Operation
(Doctoral theses at NTNU;2020:161, Doctoral thesis, 2020)The motivation behind the thesis was to increase the knowledge and to expand the possibilities within industrial mineral mining, an important mining sector in Norway. This was done through extensive deposit study and an ... -
Geomechanical analysis of the influence of CO2 injection location on fault stability
(Peer reviewed; Journal article, 2016)Large amounts of carbon dioxide (CO2) should be injected in deep saline formations to mitigate climate change, implying geomechanical challenges that require further understanding. Pressure build-up induced by CO2 injection ... -
Experimental investigation of surface-functionalised silica nanoparticles for enhanced oil recovery
(Doctoral theses at NTNU;2020:66, Doctoral thesis, 2020)Enhanced oil recovery (EOR) using nanoparticles (NPs) has been proposed as a solution in the petroleum industry to overcome declining production rates. Research has shown that commercially available hydrophilic silica NPs, ... -
Influence of jaw crusher parameters on the quality of primary crushed aggregates
(Journal article; Peer reviewed, 2020)A parameter study using a jaw crusher is designed to investigate the influence of feed gradation, feed rate, crusher setting and crusher speed on the crusher operation and the quality of the produced aggregates. The study ...
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