Blar i Institutt for geovitenskap og petroleum på tittel
Viser treff 1345-1364 av 2535
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Limit analysis for the seismic stability of three-dimensional rock slopes using the generalized Hoek-Brown criterion
(Peer reviewed; Journal article, 2021)The parameters that influence slope stability and their criteria of failure are fairly understood but over-conservative design approaches are often preferred, which can result in excessive overburden removal that may ... -
Lineament mapping and its accuracy for forecasting weakness zones in tunnel construction. A case study of the Oslo region.
(Master thesis, 2023)Lineamentkartlegging er et mye brukt verktøy for å forutsi svakhetssoner i underjordiske installasjoner, men hvor nøyaktige er disse kartene? Denne masteroppgaven presenterer en statistisk analyse av nøyaktigheten til ... -
Linking basin evolution to plate tectonic processes in (northern) Africa
(Master thesis, 2011)Several sedimentary basins in Africa are classified as intracratonic basins, but no conclusive formation mechanism has been identified for these basin types. Tectonic subsidence curves may help in unraveling formation ... -
Linking molecular structures of yeast-derived biosurfactants with their foaming, interfacial, and flotation properties
(Peer reviewed; Journal article, 2021)Yeast-derived bola amphiphiles have attracted growing attention in various industrial sectors as green reagents. However, their physico-chemical properties relevant to mineral separation by froth flotation are poorly ... -
Liquiñe‑Ofqui’s fast slipping intra‑volcanic arc crustal faulting above the subducted Chile Ridge
(Peer reviewed; Journal article, 2021)The southernmost portion of the Liquiñe-Ofqui fault zone (LOFZ) lies within the proposed slab window which formed due to oblique subduction of the Chile Ridge in Patagonia. Mapping of paleo-surface ruptures, offsets, and ... -
Lithological and structural analysis of the Rødberget-Rørvika-Varpneset transect, Mid Norwegian Caledonides - Testing tectonostratigraphic correlations and structural models
(Master thesis, 2016)Remnants of the Caledonian orogen are visible through tectonostratigraphic and structural fingerprints in Central Norway, and the detailed study of key localities is important for the understanding of the overall evolution ... -
A Lithological Interpretation of Upper Jurassic and Lower Cretaceous Formations in the Halten Terrace Area of the Norwegian Sea, Based on the Advanced Well Logs and Core Descriptions.
(Master thesis, 2017)The Interpretation emphasizes on the mineral identification of the encountered formations in both wells using advance well data and correlating the results with the geology of the Halten Terrace along with the aid of core ... -
Lithology classification of whole core CT scans using convolutional neural networks
(Journal article; Peer reviewed, 2021) -
Lithology classification of whole core CT scans using convolutional neural networks
(Peer reviewed; Journal article, 2021)X-ray computerized tomography (CT) images as digital representations of whole cores can provide valuable information on the composition and internal structure of cores extracted from wells. Incorporation of millimeter-scale ... -
Lithology detetection in real time
(Master thesis, 2013)The works published until today about lithological interpretation in drilling, use the ROP, rate of penetration, as the base for the diagnosis. These analyses are poorly detailed and often limited to distinction between ... -
Litologi og diagenese i Froyhogdaomrádet, Norskehavet, basert på petrografi og bronnlogdata.
(Master thesis, 2011)Thin sections and petrophysical log data from a drill core west of the Frøya High, Norwegian Sea, have been studied to identify lithostratigraphy and diagenesis. The rock types and diagenesis has been interpreted based on ... -
Log Facies Evaluation and Property Modelling of a Turbidite Reservoir, the Gulf of Mexico
(Master thesis, 2012)This master thesis presents a hierarchical modelling workflow in a slope canyon of the turbidite sandstone reservoir in the Formation X at the PA field in the Gulf of Mexico. The Formation X with approximately 400 m thick ... -
Long offset time-lapse seismic and monitoring of unconventional reservoirs
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:92, Doctoral thesis, 2011)Time-lapse seismic is highly accepted as a reservoir management tool. However, it has severe challenges related to monitoring of stiff rock reservoirs due to relatively small seismic property changes for such reservoirs. ... -
Long Wire Electromagnetic Measurements (Turam EM)
(Chapter, 2020)In Scandinavia, EM measurements have traditionally been popular in sulfide ore exploration. The EM methods using a stationary cable loop or a long wire on the ground surface were called Turam. The wire was grounded by ... -
Long-term creep prediction with a modified power law model
(Chapter, 2017)Creep in weak rock is a common phenomenon observed in the laboratory. Based on short-term creep, prediction of long-term creep can be a challenge especially at elevated stress levels, since only a small stress increase may ... -
Long-term impact on unlined tunnels of hydropower plants due to frequent start/stop sequences
(Doctoral theses at NTNU;2021:400, Doctoral thesis, 2021)Abstract The concept of unlined pressure tunnel design is well-tested and has a history of more than 100 years. In Norway, more than 95% of hydropower pressure tunnels are unlined and most of it was built between 1950 ... -
Losnemekanismar og utløp til steinsprang og steinskred ved E6 Langnesberga
(Master thesis, 2023)Frå 2006 til og med 2022 er det registrert 33 steinsprang og steinskredhendingar på E6 ved Langnesberga i Trøndelag, ein av Noregs hovudfartsårer. Skreda påverkar trafikken, og har fleire gonger stengt vegstrekninga. Dei ... -
Low Salinity Waterflooding in North Sea Reservoir Rocks:: An Experimental Investigation with emphasis on Wettability Effects
(Master thesis, 2010)For the last decades several laboratory tests and field tests on low salinity waterflooding have been done on oil bearing reservoirs. Overall the tests have shown an increased oil recovery with use of low salinity water. ... -
Low Salinity Waterflooding: An experimental investigation of the potential in the Frøy field in the North Sea
(Master thesis, 2010)In recent years, the focus on enhancing the oil recovery from oil fields has increased. This is because of falling oil reserves and the increased oil price. Because of this there is a big focus on enhancing oil recovery ... -
Low-frequency acoustic signal created by rising air-gun bubble
(Journal article; Peer reviewed, 2017)In the seismic industry, there is increasing interest in generating and recording low frequencies, which leads to better data quality and can be important for full-waveform inversion. The air gun is a seismic source with ...