Browsing PhD theses (TN-lEP) by Issue Date
Now showing items 21-34 of 34
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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 ... -
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 ... -
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. ... -
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 ... -
Exploration and Improvement of the Sealability Performance of Two-Part Granite-Based Geopolymer for Oil Well Cementing Applications
(PhD Theses;821, Doctoral thesis, 2024)Zonal isolation is essential to producing hydrocarbon from the subsurface. Zonal isolation ensures the well integrity and efficiency of oil and gas wells by preventing fluid migration and ensuring optimal production in the ... -
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 ... -
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. ... -
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, ... -
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. ... -
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. ... -
Granite-Based Geopolymers for Zonal Isolation of Carbon Capture and Storage (CCS) Wells – Improvement and Characterization
(Doctoral thesis, 2025)Carbon Capture and Storage (CCS) in subsurface formations is crucial for addressing climate change challenges. As global efforts in CCS intensify, ensuring the long-term integrity of CO2 storage is paramount. Wellbore ... -
Multi-framework numerical model of the interaction between drilling fluid and drill-string
(PhD thesis UiS;836, Doctoral thesis, 2025)The need for drilling in deeper depths and different conditions drives the development of technologies associated with geoenergy sources. This process is defined by a tighly woven multi-physics environment where there is ...