Blar i Department of Energy and Petroleum Engineering (TN-IEP) på tittel
Viser treff 286-305 av 577
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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. ... -
Impact of Wettability on Rock Mechanics and Oil Recovery: A Comparative Study on Different Outcrop Chalks
(PhD thesis UiS;502, Doctoral thesis, 2020-04)Chalk reservoirs are highly fractured and are known for their remarkable storage capacity as a reservoir rock for the petroleum industry. Chalk is a sedimentary carbonate rock primarily made up of calcium carbonate (calcite, ... -
Improved Dynamic Modelling of Two-Phase Flow in Well Control Operations
(PhD thesis UiS;577, Doctoral thesis, 2021-03)This thesis focuses on exploring applications and optimizing transient numerical models for simulating well control situations. The main scope of the research was to find opportunity for improving existing numerical models ... -
Improvement of volumetric sweep efficiency during oil production using ECO-clay
(Master thesis, 2023)Excess water production during oil production is a big challenge that may affect the economics and environmental concerns. Different methods have been developed to reduce water production and improve the efficiency of oil ... -
Improving distribution system state estimation with synthetic measurements
(Peer reviewed; Journal article, 2021)Distribution state estimation is a desired feature of modern power systems. The availability of measurements from smart meters has opened the door to extend the application of state estimation techniques down to end ... -
Improving drilling hydraulics estimations ‑ a case study
(Peer reviewed; Journal article, 2021-06)Accurate pressure drop estimation is important for drill string and bit nozzles design and optimized fluid circulations as well as identifying the drilling problems such as bit nozzle(s) washout or plugging. In this study, ... -
Industrial feasibility study for the use of barite as a permanent well barrier element
(Master thesis, 2021)As more and more wells reach the end of their production life, the focus on permanent plug and abandonment has increased in interest. Cost-efficient abandonment of wells with ceased production is an important economic goal ... -
Influence of Adsorption Layer Thickness in Tight Compressible Shales subject to Gas Production
(Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-15)The gas transport in shale nanopores has always been a major concern in developing shale gas reservoirs. Different gas flow regimes in shale nanopores have been studied and classified during recent years. Some mathematical ... -
Influence of density, viscosity and interfacial tension on liquid droplet dynamics from an open-ended vertical capillary pipe. An experimental investigation
(Master thesis, 2021)The principal objective of the present work is to measure the surface tension of liquids by using a drop weight method by adding new techniques to measure exact drop size and shape, which is linked to the fall velocity and ... -
Influence of fluid viscosity hierarchy on the reverse-circulation displacement efficiency
(Peer reviewed; Journal article, 2023)Reverse-circulation cementing is an alternative strategy for well cementing where the cementing fluids are injected directly into the annulus from the surface. This cementing strategy can reduce downhole circulation pressures ... -
Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
(Journal article; Peer reviewed, 2018-04)An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending ... -
Influence of Indium on Cu/Zn and Cu/Zr catalysts for CO2 hydrogenation to methanol
(Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-15)The consequences of the anthropogenic carbon dioxide (CO2) released into the atmosphere have been forecasted as devastating for the global environment. It is mandatory to take action now, and there are alternatives under ... -
Influence of Individual Ions on Silica Nanoparticles Interaction with Berea Sandstone Minerals
(Journal article; Peer reviewed, 2019-09)Nanofluids are prepared by dispersing silica nanoparticles in aqueous media (brines). The purpose of this work is to address brine/rock interactions in presence of nanoparticles. Our previous studies have shown that silica ... -
Influence of low-frequency oscillatory motion on particle settling in Newtonian and shear-thinning non-Newtonian fluids
(Peer reviewed; Journal article, 2021-01)An experimental study is performed to observe the effect of vertical fluid oscillations on the mean settling velocity of single spherical glass particles released into mixtures of water and polymeric fluids which exhibit ... -
Influence of measured thermophysical parameters of drilling fluids on downhole temperature models
(Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-29)Predicting downhole circulating temperature is essential for successful drilling operations as bottom hole temperature variations are a major cause of changing effective mud density and mud volume. So, the effort is needed ... -
Input Selection for Dimensionless Shear Rates in Herschel-Bulkley and Power-Law Models
(Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06)Herschel-Bulkley and Power-Law models are mathematical expressions widely used to describe the pseudoplastic nature of drilling muds. Despite their popularity, these models carry an intrinsic limitation because the consistency ... -
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 ... -
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. ... -
Integrated Modelling and Simulation of Wellbore Heat Transfer Processes through High-level Programming, Sensitivity Analysis and Initial Approach with Machine Learning Predictive Models
(Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-06-30)During designing of downhole systems and selecting equipment and materials, engineers must consider in-situ conditions before taking decisions in order to be able to handle any operation in a safe and adequate manner. The ... -
Integration of Neural Networks and Wellbore Stability, a Modern Approach to Recognize Drilling Problems Through Computer Vision and Machine Learning
(Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-15)Cavings are an endless and valuable source of information when drilling operations is being performed. Multiple parameters can contribute to produce cavings which indicate that failure has occurred or is about to occur ...