Browsing Vitenskapelige publikasjoner (TN-IEP) by Subject "VDP::Teknologi: 500"
Now showing items 61-80 of 107
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Investigation of the hydraulic integrity of cement plug: Oilwell cementitious materials
(Peer reviewed; Journal article, 2023)The loss of hydraulic integrity in oil and gas wells due to the loss of cement sheath sealability can lead to environmental contamination, annular pressure build-up, and safety threats. In this study, we examine the hydraulic ... -
Learning control applied to a digital-to-analogue converter
(Chapter, 2023)Digital-to-analogue converters (DACs) exhibit several non-ideal effects that deteriorate performance. Methods in feedback control can reduce such effects. Due to implementation limitations, the feedback signal in existing ... -
A level set approach to Ostwald ripening of trapped gas bubbles in porous media
(Peer reviewed; Journal article, 2022)Ostwald ripening of gas bubbles is a thermodynamic process for mass transfer, which is important for both foam enhanced oil recovery and geological CO2 storage. We present a methodology for simulating Ostwald ripening of ... -
Leveraging Synergies by Combining Polytetrafluorethylene with Polyvinylidene Fluoride for Solvent-Free Graphite Anode Fabrication
(Peer reviewed; Journal article, 2022)Solvent-free graphite anode is fabricated successfully with the synergistic effect of polytetrafluorethylene (PTFE) and polyvinylidene fluoride (PVDF). PTFE acts as a processing aid reagent to form a self-supporting electrode ... -
Lithium-Ion Capacitors: A Review of Strategies toward Enhancing the Performance of the Activated Carbon Cathode
(Peer reviewed; Journal article, 2023)Lithium-ion capacitors (LiC) are promising hybrid devices bridging the gap between batteries and supercapacitors by offering simultaneous high specific power and specific energy. However, an indispensable critical component ... -
Machine learning for underground gas storage with cushion CO2 using data from reservoir simulation
(Peer reviewed; Journal article, 2023)Underground natural gas storage (UNGS) is a means to store energy temporarily for later recovery and use. In such storage operations, carbon dioxide (CO2) can be injected as cushion gas to improve the operating efficiency ... -
Machine learning in reservoir permeability prediction and modelling of fluid flow in porous media
(Peer reviewed; Journal article, 2019)Reliable data on the properties of the porous medium are necessary for the correct description of the process of displacing hydrocarbons from the reservoirs and forecasting reservoir performance. The true permeability of ... -
A method for assessing drilling fluid induced formation damage in permeable formations using ceramic discs
(Peer reviewed; Journal article, 2022)When drilling an oil and gas or geothermal well, the formation's ability to produce or flow may be reduced because of exposure to the drilling fluid during the drilling operation. To evaluate such formation damage, core ... -
Modeling and investigation of the performance of a solar-assisted ground-coupled CO2 heat pump for space and water heating
(Peer reviewed; Journal article, 2023)The rise in the popularity of heat pumps should be accompanied by the increase in the utilization of environmentally-safe working fluids. To push for wider uptake of hybrid heat pump systems that use natural working fluids, ... -
MoS2 Nanoparticle Effects on 80°C Thermally Stable Water-Based Drilling Fluid
(Peer reviewed; Journal article, 2021-11)Bentonite-based drilling fluids are used for drilling, where inhibitive fluids are not required. The rheological and the density properties of the drilling fluids are highly affected by high temperature and pressure. Due ... -
Natural gas: A transition fuel for sustainable energy system transformation?
(Peer reviewed; Journal article, 2019)Current discourse on the transition to a decarbonized energy system future is dominated by renewable energy solutions. Initial conditions for this transition may vary across different regions and countries. There are, ... -
Non-precious metal activated MoSi2N4 monolayers for high-performance OER and ORR electrocatalysts: A first-principles study
(Peer reviewed; Journal article, 2022)Developing high-performance electrocatalysts for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is crucial for energy conversion and storage. Recently, a new type of two-dimensional material MoSi2N4 ... -
Numerical investigation of the impacts of borehole breakouts on breakdown pressure
(Peer reviewed; Journal article, 2019)Borehole breakouts appear in drilling and production operations when rock subjected to in situ stress experiences shear failure. However, if a borehole breakout occurs, the boundary of the borehole is no longer circular ... -
Numerical Modelling and Sensitivity Analysis of Gas Kick Migration and Unloading of Riser
(Chapter, 2019)In deepwater wells there is a risk of gas entering the riser. This can be caused by gas being trapped by the BOP after a well kill operation, or it can be that the BOP was not closed quickly enough upon kick detection. ... -
A numerical study of density-unstable reverse circulation displacement for primary cementing
(Peer reviewed; Journal article, 2022)Primary cementing of the casing string is the operation where the annular space behind the casing is displaced to a cement slurry. Once hardened, the cement should form a solid annular barrier and provide zonal isolation ... -
Oil-based drilling fluid's cuttings bed removal properties for deviated wellbores
(Peer reviewed; Journal article, 2021)Results from cuttings transport tests in the laboratory using different field-applied oil-based drilling fluids with similar weight and varying viscosities are presented in this paper. The fluids are designed for highly ... -
On the Viability of Lithium Bis(fluorosulfonyl)imide as Electrolyte Salt for Use in Lithium-Ion Capacitors
(Peer reviewed; Journal article, 2023)Lithium-ion capacitors (LICs) represent promising high-power energy storage devices, most commonly composed of a lithium-ion intercalation anode (e. g., graphite or hard carbon), a supercapacitor activated carbon (AC) ... -
Petroleum Sector-Driven Roadmap for Future Hydrogen Economy
(Peer reviewed; Journal article, 2021)In the climate change mitigation context based on the blue hydrogen concept, a narrative frame is presented in this paper to build the argument for solving the energy trilemma, which is the possibility of job loss and ... -
Potential Assessment and Economic Analysis of Concentrated Solar Power against Solar Photovoltaic Technology
(Peer reviewed; Journal article, 2023)Competition between concentrated solar power and solar photovoltaic has been the subject of frequent debate in recent years based on their cost of fabrication, efficiency, storage, levelized cost of energy, reliability, ... -
Power Transmission and Control in Microturbines’ Electronics: A Review
(Peer reviewed; Journal article, 2023)When the shaft rotates in microturbines, the rotational movement is converted to electrical power. This is achieved through a permanent magnet synchronous machine (PMSM) housed on the shaft and the power electronics ...