PhD theses (TN-IPT)
Recent Submissions
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Experimental and Theoretical Modelling of CO2 Injectivity : Effect of Fines Migration and Salt Precipitation
(PhD thesis UiS;, Doctoral thesis, 2017-11)Adequate well injectivity is required to inject large volumes of CO2 at acceptable rates through a minimum number of wells. Mineral dissolution and salt precipitation could impair CO2 injectivity and reduce the quality and ... -
Enhanced oil recovery from Sandstones and Carbonates with “Smart Water”
(PhD thesis UiS;341, Doctoral thesis, 2017-03-31)According to the International Energy Agency crude oil is expected to contribute approximately with 26% of the world’s energy supply by 2040. In a per year basis, new oil discoveries have dropped to a 60-year low in 2015, ... -
Evaluation of Cellulose Nanocrystals as a Green "Smart Water" Additive in Enhanced Oil Recovery from Sandstone Reservoirs
(PhD thesis UiS;348, Doctoral thesis, 2017-06-15)Petroleum reservoir production is frequently supported by using flooding fluids, and offshore this fluid will very often be seawater. The efficiency of this water injection is affected by various factors, such as the ... -
Contribution to supply chain management and incentive modeling with application from the upstream oil and gas industry
(PhD thesis UiS;, Doctoral thesis, 2011)The general subject of this thesis is incentive modeling related to inter-organizational relationships and supply chain management in the oil and gas industry. More specifically, it ncludes an embedded multiple case study ... -
Gas Hydrate Growth Kinetics ; Experimental Study Related to Effects of Heat Transfer
(PhD thesis UiS;335, Doctoral thesis, 2017-02-16)Gas hydrate thermodynamics and phase equilibria is already well established. However, some knowledge gaps still need to be filled in gas hydrate growth kinetics, in relation to new gas hydrate based technologies in gas ... -
Materials for optimized P&A performance: Potential utilization of geopolymers
(PhD thesis UiS;292, Doctoral thesis, 2016-05)When a well reaches the end of its life-cycle, it must be permanently plugged and abandoned. Plug and abandonment (P&A) can easily contribute with 25% of the total drilling costs of exploration wells offshore Norway. The ... -
Water weakening of chalk: A mechanistic study
(PhD thesis UiS;11, Doctoral thesis, 2005)Since the detection of the Ekofisk subsidence some 20 years ago, there has been a considerable research activity concerning chalk behaviour in general, and mechanical properties particularly. Due to the importance of water ... -
Seismic Imaging of Fault Zones : A synthetic workflow to study the impact of faults on seismic images
(PhD thesis UiS;293, Doctoral thesis, 2016-06-02)Although typically interpreted as 2D surfaces, faults are 3D narrow zones of highly and heterogeneously strained rocks with petrophysical properties differing from the host rock. Fault zones have been extensively studied ... -
Use of successive pressure build-up test data from well A-1 H in the Snadd field to obtain dynamic reservoir information
(Masteroppgave/UIS-TN-IPT/2015;, Master thesis, 2015-07)Well A-1 H in the Snadd field was put on test production at the beginning of 2013. Since then, a series of pressure build-up tests has been conducted. These aimed to allow the evaluation of the quality of the Lysing prospect ... -
Improved Well Design with Risk and Uncertainty Analysis
(PhD thesis UiS;242, Doctoral thesis, 2015-01-16)Uncertainty and associated risk assessment are frequently applied in many disciplines such as engineering, medicine and economics. Yet this study is limited to a quantitative uncertainty analysis with respect to well design, ... -
Evaluation of Alkaline Sodium Silicate Gel for Reservoir In-Depth Profile Modifications to Enhance Water Sweep Efficiency in Sandstone Reservoirs
(PhD thesis UiS;221, Doctoral thesis, 2014-03)Alkaline sodium silicate (Na-silicate) is addressed to be applied for in-depth water conformance control in sandstone reservoirs containing high permeability layers. The main factors affecting the gel time, strength ... -
Wellhead Fatigue Analysis : Surface casing cement boundary condition for subsea wellhead fatigue analytical models
(;163, Doctoral thesis, 2012-05-31)Material fatigue is a failure mode that has been known to researchers and engineers since the 19th century. Catastrophic accidents have happened due to fatigue failures of structures, machinery and transport vehicles. ... -
Pore scale modeling of capillary pressure curves in 2D rock images
(PhD thesis UiS;213, Doctoral thesis, 2013-12-10)Capillary pressure is relevant to most processes of multiphase flow inporous media, as it controls the pore scale fluids distribution. Reliable capillary pressure curves are required to model and predict larger-scale ... -
A novel approach to surfactant flooding under mixed-wet conditions
(PhD thesis UiS;202, Doctoral thesis, 2013-09-13)In early days, a large number of research studies have been done based on the assumption that most of the sandstone reservoirs are strongly water-wet. Now it is widely accepted that most of sandstone reservoirs are at ... -
Investigated Miscible CO2 Flooding for Enhancing Oil Recovery in Wettability Altered Chalk and Sandstone Rocks
(PhD thesis UiS;162, Doctoral thesis, 2012-05-29)The thesis addresses oil recovery by miscible CO2 flooding from modified sandstone and chalk rocks. Calcite mineral surface is modified with stearic acid (SA) and asphaltene, and the silicate mineral surfaces are modified ... -
Water-Based EOR in Limestone by Smart Water : A study of surface chemistry
(PhD thesis UiS;147, Doctoral thesis, 2011-12-09) -
Kinetics of gas hydrate nucleation and growth
(PhD thesis UiS;136, Doctoral thesis, 2011-09-22) -
Waterflooding of carbonate reservoirs : EOR by wettability alteration
(PhD thesis UiS;50, Doctoral thesis, 2008-05-30)Oil production is generally divided into three stages, primary recovery, secondary recovery and tertiary recovery. In primary recovery, which is usually (but not necessarily) the first production stage, the natural energy ... -
Rheological performance of cementitious materials used in well cementing
(PhD thesis UiS;, Doctoral thesis, 2007-12-14) -
Particle settling in non-Newtonian drilling fluids
(PhD thesis UiS;80, Doctoral thesis, 2009-12-14)Particle settling is relevant for several aspects of drilling and completion operations, and is directly related to safety and operational efficiency. The primary function of particles added to drilling fluids is to ...