Browsing Vitenskapelige publikasjoner (TN-IEP) by Title
Now showing items 139-158 of 224
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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, ... -
New Insights into the Behaviour of Commercial Silicon Electrode Materials via Empirical Fitting of Galvanostatic Charge-Discharge Curves
(Peer reviewed; Journal article, 2023)Silicon (Si) materials for use in Lithium ion batteries (LIBs) are of continued interest to battery manufacturers. With an increasing number of commercially available Si materials, evaluating their performance becomes a ... -
New Simple Analytical Surge/Swab Pressure Model for Power-Law and Modified Yield-Power-Law Fluid in Concentric/Eccentric Geometry
(Peer reviewed; Journal article, 2023)The axial movement of pipe in and out of the well generates positive (surge) and negative (swab) pressures that will impact the well pressure. When the swab and surge effects cause well pressures outside the allowable ... -
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 ... -
The Norwegian Water Column Monitoring programme 2021: Assessing the impacts of Ekofisk and Eldfisk offshore oil and gas installations on the marine environment
(NIVA-rapport;, Research report, 2023)The Norwegian offshore Water Column Monitoring (WCM) programme investigated the potential effects of Ekofisk and Eldfisk oil and gas installations on the marine environment. Produced water (PW) impacts were assessed in the ... -
A novel approach based on artificial neural network for calibration of multi-hole pressure probes
(Peer reviewed; Journal article, 2020)Imperfections in the manufacturing process of flow measuring probes affect their measuring behavior. Nevertheless, in order to provide the highest possible accuracy, each individual multi-hole pressure probe has to be ... -
Numerical Investigation of Non-Darcy Flow Regime Transitions in Shale Gas Production
(Peer reviewed; Journal article, 2020-07)Shale gas reservoirs are organic rich formations with often ultra-low permeability. Gas is stored in free and adsorbed form. Conventional Darcy flow cannot fully describe the gas transport in such porous media. It is thus ... -
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 numerical discretization of a tumor progression model driven by competing migration mechanisms
(Peer reviewed; Journal article, 2021)In this work we explore a recently proposed biphasic cell-fluid chemotaxis-Stokes model which is able to represent two competing cancer cell migration mechanisms reported from experimental studies. Both mechanisms depend ... -
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) ... -
Optimizing the separation factor along a directional well trajectory to minimize collision risk
(Peer reviewed; Journal article, 2020-04)Optimizing the trajectory of directional wellbores is essential to minimize drilling costs and the impacts of potential drilling problems. It poses multi-objective optimization challenges. Well-design optimization models ... -
Periodic CO2 Injection for Improved Storage Capacity and Pressure Management under Intermittent CO2 Supply
(Peer reviewed; Journal article, 2022-01)Storing CO2 in geological formations is an important component of reducing greenhouse gases emissions. The Carbon Capture and Storage (CCS) industry is now in its establishing phase, and if successful, massive storage ... -
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 ... -
A petrostate’s outlook on low-carbon transitions: The discursive frames of petroleum policy in norway
(Peer reviewed; Journal article, 2021-08)Norway is a petroleum exporting country that, simultaneously, is at the forefront of implementing ambitious climate policy measures. Through a discourse analysis of official documents that address petroleum policy, this ... -
Physics-Based Swab and Surge Simulations and the Machine Learning Modeling of Field Telemetry Swab Datasets
(Peer reviewed; Journal article, 2023)Drilling operations are the major cost factor for the oil industry. Appropriately designed operations are essential for successful drilling. Optimized drilling operations also enhance drilling performance and reduce drilling ... -
Pipe Viscometer for Continuous Viscosity and Density Measurement of Oil Well Barrier Materials
(Peer reviewed; Journal article, 2023)The barrier material is a crucial component for wells, as it provides mechanical support to the casing and prevents the uncontrolled flow of formation fluids, ensuring zonal isolation. One of the essential prerequisites ... -
Plug & abandonment of offshore wells: Ensuring long-term well integrity and cost-efficiency
(Peer reviewed; Journal article, 2019-10)There is an upcoming "P&A wave" of wells that need to be permanently plugged and abandoned, especially in mature, offshore areas such as the North Sea and Gulf of Mexico. It is important to ensure that plugged wells do not ...