PhD theses (TN-lEP)
Recent Submissions
-
Fluid displacements for conventional and reverse circulation primary cementing
(PhD thesis UiS;820, Doctoral thesis, 2024)The effective cementing of wells for oil and gas production, geothermal energy recovery and geological carbon storage is critical for ensuring well integrity and preventing fluid migration along the wellbore. This thesis ... -
Material for Zonal Isolation of Shallow Formation: State-of-the-art and Development of Alternative Material
(PhD Theses;808, Doctoral thesis, 2024)Shallow depth cementing remains a challenge in well construction due to its unique characteristic of low temperature and low formation pressure. Potential flow zones such as shallow gas and shallow water flow increase ... -
Subsea Pumped Hydro Energy Storage : Exploring the need, possibilities, and limitations in the Energy Transition
(PhD Theses UiS;792, Doctoral thesis, 2024)In light of the global challenges posed by climate change and the required mitigation of its effects, the transition from conventional fossil fuels to renewable energy sources has accelerated, albeit with significant ... -
Impact of Mud Contamination on Performance of Granite-Based Geopolymers
(PhD Theses UiS;782, Doctoral thesis, 2024)Ensuring zonal isolation and long-term integrity are fundamental in primary cementing in the well construction phase. Successful cementing can be compromised by various factors, including contamination with drilling fluid. ... -
Development of Real-Time Smart Data Analytic Tools for Monitoring and Optimum Operation of MGT Systems
(PhD Theses;762, Doctoral thesis, 2024)In the evolving energy landscape, a shift away from traditional centralized power models is underway. Distributed energy generation (DEG) takes the spotlight, enabling consumers to utilize a tailored mix of energy sources. ... -
Ostwald ripening of trapped gas bubbles in porous media : A pore-scale perspective
(PhD thesis UiS;747, Doctoral thesis, 2024)Ostwald ripening of gas bubbles is a thermodynamic process for mass transfer, which is significant for both foam-enhanced oil recovery and underground gas storage. During recovery, it can impact the macroscopic efficiency. ... -
Enabling long cycle life lithium-ion capacitors through electrode-electrolyte interface optimization
(PhD thesis UiS;749, Doctoral thesis, 2024)Electrode-electrolyte interfaces in electrochemical cells represent critical boundaries between the electrode and electrolyte where most charge transfer or storage processes are initiated. Accordingly, the interface ... -
Exploring the behaviour of Silicon by empirical analysis of galvanostatic charge-discharge curves
(PhD Theses;, Doctoral thesis, 2024)The capability of battery materials to deliver not only high lithium (Li) storage capacity, but also the ability to operate at high charge/discharge rates is an essential property for development of new batteries. First, ... -
Nanoparticles for Oil Well Drilling Fluids and Cement
(PhD Theses;738, Doctoral thesis, 2024)Drilling fluids and oil well cement are essential elements of the drilling process and well construction. Drilling fluids play a crucial role in the drilling process, ensuring the safety and efficiency of well construction. ... -
Identification of Nonlinear Conservation Laws Using Symbolic Neural Networks
(PhD Theses;731, Doctoral thesis, 2023)Nonlinear dynamical systems are omnipresent in nature, commonly seen in many disciplines such as physics, biology, chemistry, climate science, and engineering. In this thesis, we introduce several new ideas by integrating ... -
Drilling Fluid Additives for Wellbore Strengthening and Reservoir Protection
(PhD Theses;726, Doctoral thesis, 2023)The objective of the research was to optimise drilling fluid additives for wellbore strengthening, preventing lost circulation and avoiding drilling fluid induced formation damage. Industry standard testing, such as HTHP ... -
Synthesis and Development of One-part Rock-based Geopolymers for Well Cementing Applications
(PhD Theses UiS;717, Doctoral thesis, 2023)A one-part or Just Add Water (JAW) geopolymer system is an environmental- and user-friendly alternative to Ordinary Portland Cement (OPC) and conventional geopolymers. It helps with producing lower CO2 emissions avoiding ... -
Transition-metal-mediated electrocatalytic CO2 reduction: from nanoparticles to single-atom catalysts
(PhD Theses;709, Doctoral thesis, 2023)With the rapid development of the global economy, energy crisis and environment issues have become increasingly prominent. Carbon dioxide (CO2) is a primary greenhouse gas (CHG), while it could also be a valuable carbon ... -
Techno-economic assessment of decarbonisation technologies for the iron and steel industry
(PhD Theses;704, Doctoral thesis, 2023)Rapid decarbonisation of all segments of the economy is essential to limit the global mean surface temperature rise to 1.5ºC. Industries contribute to approximately a quarter of the global energy related emissions but have ... -
Instituting Retarders for Geopolymers Developed for Downhole Applications
(PhD Theses;699, Doctoral thesis, 2023)Geopolymers are a cementitious material that has been under study for many years. The material is noticed as a potential full replacement for traditional cementitious material both in construction and petroleum industry. ... -
Solvent-Free Electrode Fabrication Based on Polytetrafluoroethylene Fibrillation for Lithium-ion Batteries
(PhD Theses;883, Doctoral thesis, 2023)The commercial lithium-ion batteries (LiBs) electrodes are manufactured with slurry casting (SC) procedure, where a large amount of energy is consumed, increasing the manufacturing cost a lot. In addition, the SC procedure ... -
Characterization of annulus well cement quality to estimate the leakage potential in cement well barriers
(PhD Theses;676, Doctoral thesis, 2022-11)Cement is nowadays the most used material that is placed inside of wells as a barrier element to ensure zonal isolation and avoid migration of fluids between the reservoir and surface. Sometimes the well integrity can be ... -
Prediction, interpolation and extrapolation of drilling data with Deep Learning
(Doctoral thesis, 2022-11)Directional drilling is an established technology within the petroleum industry. In this traditionally conservative and risk averse environment application of artificial intelligence encounters difficulties at various ... -
Materials for Well Integrity: Performance of Setting Materials for Well Cementing Operation
(PhD thesis UiS;642, Doctoral thesis, 2022-05)Primary cementing operation is the process of pumping and placing a cementitious slurry in a well. After setting, the so-called barrier material has to provide zonal isolation in the annular gap behind casing string. After ... -
Mathematical modeling of compressible and incompressible multiphase flow based on mixture theory
(PhD thesis UiS;501, Doctoral thesis, 2020-11)MIXTURE THEORY has been developed based on balance laws and conservation principles which is well known in continuum mechanics, and has been widely applied to systems which can be characterized as a mixture of interacting ...
RSS 2.0