Blar i Institutt for geovitenskap og petroleum på emneord "Petroleumsfag, Petroleumsgeofysikk"
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3D Analysis of Temperature and Heat flow in Steady State Approximation in the Halten Terrace
(Master thesis, 2015)Thermal effects and heat flow distribution are of major interest as they affect the petroleum system in a sedimentary basin. Heat controls the maturation and generation of hydrocarbons as well as the reservoir quality. ... -
Acquisition, Processing and Interpretation of Geophysical Data from the Fen Complex in Telemark, Norway
(Master thesis, 2017)This Master s thesis focuses on the acquisition and processing of geophysical data to map the geology of the Fen Complex in Telemark, Norway. Three resistivity and two seismic profiles where acquired at the Fen Complex ... -
AVO Analysis of the Upper Utsira Interface at the Sleipner Field during Fluid Substitution
(Master thesis, 2017)Higher concentration of carbon dioxide (CO2) in the atmosphere has contributed to increased interest in subsurface carbon capture and storage (CCS) projects. Geologic storage of CO2 re- quires careful prior studies of ... -
Broadband processing of conventional 3D seismic data for near surface geohazard investigation: A North Sea case study
(Master thesis, 2015)3D exploration seismic data is increasingly being utilized for geohazard studies in the offshore oil and gas industry. An important criterion for the success of this approach is that the seismic data contain the broadest ... -
The effects of anisotropy on AVO behavoir on shallow reflectors from Sleipner
(Master thesis, 2015)AVO analysis is an important tool in discriminating between oil, gas and brine saturated rocks in a given reservoir unit. Although, to use AVO analysis can be challenging as there are many pitfalls connected to different ... -
Electromagnetic Modelling and Inversion of Seafloor Massive Sulphide Deposits - Imaging of SMS Deposits and the Asthenosphere at the Atlantic Mid-Ocean Ridge
(Master thesis, 2017)Seafloor massive sulphides (SMS) are seen as an increasingly important mineral resource for the future. Fewer mineral discoveries are being made in the shallow subsurface onshore, and therefore a more petroleum related ... -
Enhanced lithological description of the Jurassic sequence in the Viking Graben and Oseberg Terrace using machine learning
(Master thesis, 2018)Automatic classifications of well logs using machine learning techniques has gained improved attention within the last couple of years among others for increasing the accuracy and speed of lithofacies prediction on wireline ... -
Estimating Overburden Dilation Factors Using Geomechanical Modeling, Time-Lapse Seismic and Bathtymetry Data - A Case Study from The Ekofisk Field
(Master thesis, 2017)As reservoir compaction is causing variations in both layer thickness and seismic velocities, it is of interest to distinguish between these two effects. The dilation factor R can be used to link the geophysical observables ... -
Estimation of Barents Sea uplift by comparison of linear trend lines from well log properties
(Master thesis, 2017)Linear trends of measured well log properties have been compared in this thesis, to see if uplift in the Barents Sea can be estimated. Reference trends from areas that have not been uplifted, wells 15/9-6, 34/7-1, 34/7-5 ... -
Estimation of Timeshifts and Velocity Changes from 4D Seismic Analysis: A Case Study from the Norne Field
(Master thesis, 2018)The scope of this thesis is to investigate whether it is possible to determine the vertical strain in the overburden directly from the 4D seismic data from the Norne field in the Norwegian sea, by using changes in traveltime ... -
Estimation of Water Velocity and Tidal Changes Between 4D Seismic Vintages
(Master thesis, 2017)Between the acquisitions of the vintages used in 4D seismic, both the seismic water velocity and the tidal level can change. These changes will create time shifts that reduce the 4D seismic's sensitivity to real changes ... -
Full waveform inversion and wave equation migration using 4D seismic from the Sleipner Field - A CO2-monitoring study
(Master thesis, 2017)In this study, two surveys from the Sleipner field in the North Sea are investigated. The surveys cover the same area, but are acquired at different times - respectively before and after the initiation of CO2 injection. ... -
Geomechanical modelling of subsidence and induced seismicity in a gas reservoir
(Master thesis, 2015)Reservoir compaction and associated surface subsidence, fault reactivation and induced earthquakes are observed in many petroleum fields worldwide. A better understanding of the geomechanical behaviour of reservoir rocks ... -
Improved Constraint on Salt Geometry in the Southern Nordkapp Basin - Modeling salt geometry using potential field data integrated with traditional reflection seismic and well data.
(Master thesis, 2017)The Nordkapp Basin is a characteristic graben feature in the Western Barents Sea affected by multiple episodes of passive and active diapirism. The salt structures make the Nordkapp Basin an interesting area for studying ... -
Improved Petrophysical Evaluation of a Thinly Bedded Oil and Gas Bearing Reservoir, Using Triaxial Resistivity and Nuclear Magnetic Resonance Well Logging Measurements
(Master thesis, 2016)The aim of this thesis was to conduct a petrophysical analysis on a laminated thin bedded reservoir from well 7220/8-1, containing gas in the upper section. A conventional analysis was done in advance, in order to create ... -
Integrating Laboratory Data in a Rock Physics Model to Characterise the Effects of Exhumation on P-wave Velocities
(Master thesis, 2018)Rocks have memory. The characteristics measured by seismic, wireline or in laboratory tests on cores depend on the history that brought the rock to its current state. The burial history is also a controlling factor on ... -
Inverse Scattering Series internal multiple prediction through utilization of sparse transforms - Including high-performance implementational aspects
(Master thesis, 2018)Industry standard imaging algorithms do not treat internal multiples correctly. 'Cross-talk' with primary reflections may therefore occur in the imaging procedure, potentially causing significant artifacts in the image of ... -
Micro-Oscillations in Seismic Signals - An Investigation Into Possible Multi-Bubble Origins
(Master thesis, 2018)Since its first use in the early 20th century, seismic acquisition has become the most utilised method of marine hydrocarbon exploration. At its core, the method relies upon pressure imbalances between a bubble of pressurised ... -
Modelling Geophysical Properties of Crustal Igneous Rocks
(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, ... -
Obtaining the Source Wavefield from Multicomponent Data and its Application in Full Waveform Inversion
(Master thesis, 2015)In full waveform inversion (FWI) we need to know the seismic source signature. In practice this is generally unknown, and it must be estimated using statistical methods or inversion. However, these methods rely on assumptions ...