Blar i Department of Energy and Petroleum Engineering (TN-IEP) på emneord "VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510"
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An approach for optimization of controllable drilling parameters for motorized bottom hole assembly in a specific formation
(Peer reviewed; Journal article, 2023)This study focuses on optimizing drilling parameters when using Positive Displacement Motors (PDMs). In drilling operations involving mud motors, weight-on-bit (WOB) alterations lead to variations in the system's parasitic ... -
Characteristic forced and spontaneous imbibition behavior in strongly water-wet sandstones based on experiments and simulation
(Peer reviewed; Journal article, 2022-05)Forced and spontaneous imbibition of water is performed to displace oil from strongly water-wet Gray Berea (~130 mD) and Bentheimer (~1900 mD) sandstone core plugs. Two nonpolar oils (n-heptane and Marcol-82) were used as ... -
Development of One-Part Rock-Based Geopolymers for Downhole Cementing Applications
(Peer reviewed; Journal article, 2023-10)The use of geopolymers as a full replacement for cement in oil well cementing applications requires the development of not only environmentally friendly but also user-friendly cementitious materials. This study aims to ... -
Effect of Iron Oxide Nanoparticles on the Properties of Water-Based Drilling Fluids
(Peer reviewed; Journal article, 2020-12)In recent years, several studies have indicated the impact of nanoparticles (NPs) on various properties (such as viscosity and fluid loss) of conventional drilling fluids. Our previous study with commercial iron oxide NPs ... -
The effect of temperature on CO2 injectivity in sandstone reservoirs
(Peer reviewed; Journal article, 2022)Carbon Capture, Utilization and Storage (CCUS) is a pragmatic technology that could reduce anthropogenic CO2 and halt climate change. CO2 injectivity is affected by several physicochemical interactions around the injection ... -
Efficient Removal of Magnetic Contamination from Drilling Fluids – The Effect on Directional Drilling
(Peer reviewed; Journal article, 2021)Magnetic debris in a drilling fluid have a significant influence on the ability of the drilling fluid to maintain its function. Down hole logging can suffer from poor signal to noise ratios. Directional drilling in areas ... -
Experimental and theoretical investigation of the mechanisms of drying during CO2 injection into saline reservoirs
(Peer reviewed; Journal article, 2023)A viable CO2 storage resource must have sufficient storage capacity, reliable containment efficiency and adequate well injectivity. Deep saline formations stand out in terms of storage capacity and containment efficiency. ... -
Insights from Boltzmann transformation in solving 1D counter-current spontaneous imbibition at early and late time
(Peer reviewed; Journal article, 2023)Counter-current 1D spontaneous imbibition in scaled form is investigated using Boltzmann transform before and after water meets the closed boundary (early and late time). At early time the system is self-similar and only ... -
Mineral replacement in long-term flooded porous carbonate rocks
(Peer reviewed; Journal article, 2019-09)This study reports mineralogical and physical property changes linked to geo-chemical alterations processes during three ultra-long-term tri-axial tests on outcrop-chalk from Liège (Belgium). The test core plugs were flooded ... -
Multiscale insights into mechanical performance of a granite-based geopolymer: Unveiling the micro to macro behavior
(Peer reviewed; Journal article, 2023-09)Geopolymers (GPs), based on rocks and similar (waste) materials, have shown promising features as alternatives to Ordinary Portland Cement (OPC) in many applications. The properties of these materials can be tailored to a ... -
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 ... -
Rheological Compatibility of a Hardening Spacer Fluid and Oil-based Drilling Fluid
(Peer reviewed; Journal article, 2023-08)In the placement process of the cement slurry, treatment fluids such as the spacer are pumped ahead of the cementitious slurry to minimize the contamination of the slurry by drilling fluid and ensure superior bonding to ... -
Safety and reliability improvement of valves and actuators in the offshore oil and gas industry
(Peer reviewed; Journal article, 2022)Valve failure is a major risk and a costly phenomenon in the offshore sector of the oil and gas industry. It results in severe negative consequences, such as a loss of assets, a loss of production due to plant shutdowns, ... -
Selection of Optimal Well Trajectory Using Multi-Objective Genetic Algorithm and TOPSIS Method
(Peer reviewed; Journal article, 2023)This study presents a novel approach for optimizing well paths in extended reach drilling (ERD) wells. Different trajectories can be used for ERD wells, each with its pros and cons. Previous research overlooked certain ... -
A semi-analytical solution for shale gas production from compressible matrix including scaling of gas recovery
(Peer reviewed; Journal article, 2021-09)The aim of this work is to present semi-analytical solutions for shale gas production from a 1D porous medium, where constant pressure is assumed at one side and a no-flow boundary at the other. Adsorbed gas is modeled by ... -
Simulation and Prediction of Countercurrent Spontaneous Imbibition at Early and Late Time Using Physics-Informed Neural Networks
(Peer reviewed; Journal article, 2023-09)The application of physics-informed neural networks (PINNs) is investigated for the first time in solving the one-dimensional countercurrent spontaneous imbibition (COUCSI) problem at both early and late time (i.e., before ... -
Temperature-Dependent Classification of Geopolymers Derived from Granite Designed for Well Cementing Applications
(Peer reviewed; Journal article, 2023)Alternative materials such as geopolymers appear to have potential advantages compared to Portland cement. However, the application of geopolymers for all sections of the well is still a major challenge due to the difference ... -
Theoretical study of single transition metal atom catalysts supported on two-dimensional Nb2NO2 for efficient electrochemical CO2 reduction to CH4
(Peer reviewed; Journal article, 2022-05)The design of highly efficient catalysts for electrochemical reduction CO2 (ECR) to value-add chemicals and fuels is important for CO2 conversion technologies. In this work, earth abundant transition metal (TM = V, Cr, Mn, ... -
Unravelling key controls on the rift climax to post-rift fill of marine rift basins: insights from 3D seismic analysis of the Lower Cretaceous of the Hammerfest Basin, SW Barents Sea
(Journal article, 2017-10)In this study, we investigate key factors controlling the rift climax to post-rift marine basin fill. We use two- and three-dimensional seismic data in combination with sedimentological core descriptions from the Hammerfest ...