Browsing NTNU Open by Author "Duffaut, Kenneth"
Now showing items 21-38 of 38
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Modelling Geophysical Properties of Crustal Igneous Rocks
Haaland, Malin Lerstøl (Master thesis, 2017)The chemical composition of crustal igneous rocks strongly affects their geophysical properties. In order to model these effects, a classification scheme based on silica content was applied, resulting in the classes felsic, ... -
Net exhumation estimation from seismic traveltimes and burial history modelling in the Western Barents Sea.
Martinez Guzman, Ricardo Jose (Master thesis, 2018)A new seismically based technique is proposed for the estimation of net exhumation magnitudes in sedimentary basin areas. The method uses traveltimes mapped from well log data or pre-stack seismic data, starting from the ... -
Net Exhumation Estimation Using an Effective-medium Technique Based On Seismic Traveltime Measurements
Martinez, Ricardo Jose; Duffaut, Kenneth (Chapter, 2018)We propose a new seismically based technique for estimating net exhumation magnitudes on sedimentary basin areas. The method uses traveltime measurements mapped from e.g. seismic data, or ray traced well log data, starting ... -
Overpressure Distribution of the Central and Northern Viking Graben - A study of Cretaceous, Jurassic and Triassic sediments
Tjønnfjord, Karl Hampus Viberg (Master thesis, 2017)The North Sea was subjected to massive faulting during the Jurassic period, resulting in a complex graben structure. Consequently, the Viking Graben is heavily compartmentalized and overpressures occur within the Jurassic ... -
Permeability Prediction from Acoustic Velocity
Vølstad, Hanna Skårdal (Master thesis, 2016)Permeability is estimated in the middle Jurassic Garn Fm. in the Haltenbanken area in the Norwegian Sea by combining the Kozeny-Carman model for permeability estimation with Raymer s model for porosity estimation. The ... -
Porøsitetstrender estimert fra sonic og seismiske p-bølge hastighetsdata.
Flatøy, Vegard (Master thesis, 2016)Vi utvikler med dette arbeidet en ny model og metodikk for å estimere lavfrekvente porøsitetstrender fra p-bølge hastighetsdata med en mulighet for å forbedre estimert porøsitet ved å inkludere en litologisk parameter for ... -
Predicting horizontal resistivity trends: An example from the Barents Sea
Wang, Ying; Duffaut, Kenneth; Nordskag, Janniche Iren (Chapter, 2018)Exploring the major controlling factors on resistivity depth trends in sedimentary basins is an interesting subject from both scientific and commercial perspectives. We propose a rock-physics based workflow for predicting ... -
Predicting Porosity and Clay Trends from P-Wave Velocity
Helle, Anne Cathrine (Master thesis, 2018)P-waves are sensitive for several parameters, and when P-waves are the only information present, the primary effects have to be identified. In this study, two models are created to describe the relation between porosity, ... -
Spatial Variation in the Overburden R Factor at the Ekofisk Field from 4D Seismic Analysis and Geomechanical Modelling
Skadberg, Marie Wik (Master thesis, 2017)4D seismic analysis of the overburden is essential in well planning and risk analysis. The dilation factor (R) links the changes in velocities and thicknesses causing time shifts. The focus of this thesis has been determination ... -
Stress sensitivity of elastic wave velocities in granular media
Duffaut, Kenneth (Doktoravhandlinger ved NTNU, 1503-8181; 2011:45, Doctoral thesis, 2011)Knowledge of the stress sensitivity of elastic-wave velocities in sedimentary rocks with different consolidation is important for several geophysical applications such as seismic pore pressure prediction, time-lapse seismic ... -
Subsurface structure and hydrothermal fluid circulation at the Mohns mid-ocean ridge: a multi-geophysical investigation
Lim, Anna (Doctoral theses at NTNU;2020:283, Doctoral thesis, 2020)Despite the small size of submarine hydrothermal vents exposed on seafloor, the extent and geological significance of hydrothermal systems span over distance of kilometers both laterally and in depth. However, due to ... -
Temperature History And Its Impact On AVO Responses In The Halten Terrace Area
Hadler-Jacobsen, Helle (Master thesis, 2015)Temperature is a fundamentally important petroleum geology parameter affecting both i) reservoir quality preservation (diagenetic evolution) and ii) source rock maturation (hydrocarbon generation). The link between ... -
Time-shift analysis in the overburden and reservoir zones from 4D studies across the Norne field
Ibrahimli, Ofeliya (Master thesis, 2019)4D seismic is a powerful tool, mainly used for monitoring the changes in the reservoir and overburden zones that might occur due to hydrocarbon production or EOR-related changes. The observed changes on 4D seismic can be ... -
Velocity and Reflectivity variations of Overpressured Jurassic Sandstones in the Norwegian Sea
Ochonogor, Naphtali Chukwuka (Master thesis, 2016)The Garn Formation is one of the reservoir sands amongst the Jurassic Sandstones in the Norwegian-Sea. The pore-pressure and its influence on the rock properties within the Haltenbanken province in the Norwegian-Sea has ... -
Velocity Depth Trends Prediction on the Norwegian Continental Shelf (NCS) Wells Using the Bounding Average Method
Davy, Nandito (Master thesis, 2021)Earth consists of heterogeneous layers due to the complex sedimentation processes, in which lithifies both unconsolidated sand and siliciclastic clays into sandstone and shale. These two sedimentary rocks are the most ... -
Velocity ratio estimation using AVA attributes in VTI media
Zahid, Arslan (Master thesis, 2017)Amplitude variation with angle (AVA) analysis is one of the fundamental tools for hydrocarbon detection and reservoir characterization. The background trend as a function of intercept against gradient for various ⟨Vp⟩/⟨Vs⟩ ... -
Velocity-attenuation model from check-shot drift trends in North Sea well data
Carter, Andrew James; Caceres, Veronica; Duffaut, Kenneth; Stovas, Alexey (Peer reviewed; Journal article, 2020)Seismic attenuation distorts phase and narrows bandwidth in seismic surveys. It is also an exploration attribute, as, for example, gas or overpressure, may create attenuation anomalies. Compensating attenuation in imaging ... -
Well-Log Database and Automation of Well Log Depth Matching by Using Analytical Methods and Deep Learning
Caceres, Veronica Alejandra Torres (Doctoral theses at NTNU;2022:104, Doctoral thesis, 2022)Well log data formats remain rigid, outdated, and difficult to understand and to work with. The amount of available documentation is limited, thus much of the valuable information held in these data formats is left behind ...