Browsing Department of Energy Resources (TN-IER) by Title
Now showing items 41-60 of 273
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Constrained non-linear AVO inversion based on the adjoint-state optimization
(Peer reviewed; Journal article, 2022)Pre-stack AVO inversion of seismic data is a modeling tool for estimating subsurface elastic properties. Our focus is on the model-based inversion method where then unknown variables are estimated by minimizing the misfit ... -
Contribution of Geosciences in the Study of Anthropogenic Activities in Different Temporal and Spatial Contexts
(PhD thesis UiS;, Doctoral thesis, 2024)From Homo sapiens, anthropogenic activities have impacted Earth systems at different spatial and time scales, particularly since the mid-twentieth century as the geological record confirms. Such impact has triggered Earth ... -
Controls and Distributions Of Tertiary Sandstones in Southern Viking Graben
(Master thesis, 2022)The Tertiary succession in the Ve Sub-basin, Sleipner Terrace, Utsira High and Ling Depression is studied to understand the lateral and vertical distribution of Tertiary sandstones, to know if Tertiary tectonics had an ... -
Controls of basin margin tectonics on the Lower Cretaceous sedimentation in the Norwegian Barents Sea
(PhD thesis UiS;530, Doctoral thesis, 2020-06)Structural styles and stratigraphic patterns along North Atlantic margins display a large spectrum of complexity and variability. An extensive amount of subsurface data from the north-central and south-western Barents Sea ... -
Core wettability reproduction: A new solvent cleaning and core restoration strategy for chalk cores
(Peer reviewed; Journal article, 2020)Laboratory core restoration procedures include different core cleaning solvents, establishment of initial water saturation (Swi) by diverse techniques and processes of crude oil exposure that influence the final core wetting ... -
Core-scale sensitivity study of CO2 foam injection strategies for mobility control, enhanced oil recovery, and CO2 storage
(Peer reviewed; Journal article, 2020)This paper presents experimental and numerical sensitivity studies to assist injection strategy design for an ongoing CO2 foam field pilot. The aim is to increase the success of in-situ CO2 foam generation and propagation ... -
Data Assimilation Methods in Seismic Inversion
(Masteroppgave/UIS-TN-IER/2018;, Master thesis, 2018-06)Full-waverform inversion (FWI) is a powerful tool for getting high resolution images from seismic data to understand formations and the reservoir characteristics. But the inversion problems usually do not have unique ... -
Data assimilation with soft constraints (DASC) through a generalized iterative ensemble smoother
(Peer reviewed; Journal article, 2022)This work investigates an ensemble-based workflow to simultaneously handle generic, nonlinear equality and inequality constraints in reservoir data assimilation problems. The proposed workflow is built upon a recently ... -
Debiasing probabilistic oil production forecasts
(Peer reviewed; Journal article, 2022)Exploration and production companies in the hydrocarbon industry have every interest in producing unbiased production forecasts at the time of the investment decision, since it is an intrinsic part of making oil field ... -
Decision-Driven Data Analytics for Well Placement Optimization in Field Development Scenario - Powered by Machine Learning
(Masteroppgave/UIS-TN-IER/2019;, Master thesis, 2019-06-15)Application of Data Analytics and Machine Learning (ML) in petroleum reservoir management have received a lot of attention in recent years, mainly due to the availability of sheer computational resources and recorded big ... -
Design & Implementation of MLOps (Machine Learning Operations) Platform in Cloud Environment
(Master thesis, 2023)Machine Learning Operations (MLOps) concept has emerged basically to decode the shortcomings of traditional Machine Learning (ML) life cycle management in industrial applications. The incorporation of Continuous Integration ... -
Determination of phase-partitioning tracer candidates in production waters from oilfields based on solid-phase microextraction followed by gas chromatography-tandem mass spectrometry
(Peer reviewed; Journal article, 2020-08)In the present document, we report the development of an analytical method consisting of a sequential direct-immersion/headspace solid-phase microextraction (DI-HS-SPME) followed by gas-phase chromatography and tandem mass ... -
Development of new oil/water partitioning tracers for the determination of residual oil saturation in the inter-well region of water-flooded reservoirs
(PhD thesis UiS;, Doctoral thesis, 2021-03)Most of the hydrocarbon-rich large unexplored basins are located in remote and/or highly environmentally sensitive regions. As more and more oilfields reach maturity at the end of the secondary stage of recovery, while on ... -
Discovery of shale gas in organic rich Jurassic successions, Adventdalen, Central Spitsbergen, Norway
(Journal article; Peer reviewed, 2020-01)Thermogenic dry gas flowed from Jurassic sections in the DH5R research well drilled onshore in Adventdalen, central Spitsbergen, Arctic Norway. The DH5R gas originates from the organic-rich units of the mudstone-dominated ... -
Discrete Element Modelling of Sedimentation and Tectonics: Implications for the Growth of Thrust Faults and Thrust Wedges in Space and Time, and the Interpretation of Syn-Tectonic (Growth) Strata
(Peer reviewed; Journal article, 2021-09)Thrust faults, and thrust wedges, are an important part of the surface morphology and structure of many contractional mountain belts. Analogue models of thrust wedges typically provide a map- and/or side-view of their ... -
Early and Late Time Analytical Solutions for Co-current Spontaneous Imbibition and Generalized Scaling
(Peer reviewed; Journal article, 2020)We propose an explicit analytical solution for 1D cocurrent (COC) spontaneous imbibition (SI) in which a core is exposed to water (inlet) and oil (outlet). The system is described using an advection-capillary diffusion ... -
Ecosystem services in northern Norway
(Bachelor thesis, 2023) -
Effect of Initial Wettability on Rock Mechanics and Oil Recovery: Comparative Study on Outcrop Chalks
(Peer reviewed; Journal article, 2020)Brines containing surface-active divalent ions such as Ca2+, Mg2+ and SO42− impact the stiffness, strength and time-dependent deformation of water wet Mons outcrop chalk. This study documents how stiffness and strength of ... -
Effect of Wettability on Waterflooding and Relative Permeability at Slightly Water-Wet Conditions
(Masteroppgave/UIS-TN-IER/2019;, Master thesis, 2019-06-14)The wettability of a porous system is of high importance when waterflood behavior and relative permeability are investigated, because both will be strongly affected. Adsorption of polar organic components (POC) are responsible ... -
Effect of Wettability on Waterflooding and Relative Rermeability at Medium Water-Wet Conditions.
(Masteroppgave/UIS-TN-IER/2019;, Master thesis, 2019-06-15)This project contributes with experimental measurement that could increase our understanding on how relative permeability is affected by wettability during an oil recovery process. Wettability has significant attention ...