Browsing UiS Brage by Author "Aadnøy, Bernt Sigve"
Now showing items 1-20 of 28
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An evaluation of inflow control technologies on the Neptune Energy Gjøa field
Al Furati, Beder Mohammad (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-07)Operators are constantly looking for new ways to increase production and recovery in oil and gas wells by application of Intelligent Well Completions and Inflow Control Technology (ICT). For the latter, one of the main ... -
An Evaluation of Liner Deformation in the Valhall Field
Klepaker, Kristian Tande (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-06-15)Valhall is one of the giant, high porosity chalk reservoir in the southern part of the Norwegian Continental Shelf. The field has been in production since 1982 with pressure depletion and reservoir compaction as main drive ... -
Analysis of pore pressure measurements in exploration wells in the Norwegian North Sea
Neset, Else-Karin (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-12)The aim of this thesis was to examine the pore pressure measurements in the Norwegian North Sea. To study the possibility of the overpressure being an indicator that can increase the probability of hydrocarbon discoveries ... -
Application of mathematical and machine learning models to predict differential pressure of autonomous downhole inflow control devices
Yavari, Hossein; Khosravanian, Rasool; Wood, David A.; Aadnøy, Bernt Sigve (Peer reviewed; Journal article, 2021)Controlling reservoir fluid flow is important for maximizing petroleum production through wellbores. A major challenge that reduces the production of oil is early breakthrough of secondary fluids to the wellbore perforations. ... -
An approach for optimization of controllable drilling parameters for motorized bottom hole assembly in a specific formation
Yavari, Hossein; Fazaelizadeh, Mohammad; Aadnøy, Bernt Sigve; Khosravanian, Rasool; Qajar, Jafar; Sedaghatzadeh, Mostafa; Riazi, Masoud (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 ... -
Bridging performances of lost circulation materials (LC-LUBE and mica) and their blending in 80/20 and 60/40 oil-based drilling fluids
Agonafir, Mesfin Belayneh; Aadnøy, Bernt Sigve (Peer reviewed; Journal article, 2022)In drilling wells, lost circulation, barite sagging, shale swelling, and formation damage are critical problems for the industry. These problems can be controlled by designing appropriate drilling fluids and lost circulation ... -
Closed-loop well construction optimization (CLWCO) using stochastic approach under time uncertainty
Khosravanian, Rasool; Aadnøy, Bernt Sigve (Peer reviewed; Journal article, 2021)There is a digital step change taking place in well construction today. More and better data will become available for a vast number of analyses. The well construction process is complicated and includes several hundred ... -
Drilling in karstified carbonates
Kuanyshbaeyv, Alibi (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-14)Karst cavities and depressions are collectors of various minerals, such as oil and gas, drinking and industrial waters, bauxite, various ores, phosphates, diamonds, gold and tin stone, refractory clay and many others. Of ... -
Drilling Optimisation on the Norwegian Continental Shelf: Opportunities in Well Design Practice
Harris, Patrick James (Master thesis, 2018-04-17)The purpose of this thesis was to attempt to provide evidence that Norway’s drilling fraternity is long overdue for a re-think in the way it drills wells. In so doing, the author has chosen to focus on slim well drilling ... -
Dynamic Acceptance Criteria for Periodic Testing of Downhole Safety Valves
Aas, Beate (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-06-15)Downhole Safety Valves (DHSVs) are periodically leak tested as part of the preventative maintenance program on an oil and gas producing facility. The last couple of years, the oil and gas industry on the Norwegian Continental ... -
Evaluation of Casing Exit Setting Depth Criteria for Whipstock
Haarberg, Sindre (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06)Baker Hughes GE has conducted several hundred whipstock operations over the last years on the NCS with a high success rate. This work will go into detail on some of the operations that were less successful, particularly ... -
Experimental investigation of the high-pressure sealing capacity for three different LCM systems
Levang, Elise (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06)As loss of circulation is still a major problem in the drilling industry, hundreds of lost circulation treatments are available on the market. The goal of this thesis is not to present a complete list of available products, ... -
Experimental study on thermal effects on well components
Olafsson, Lilja Fure (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-06)The main objective of inflow control devices is to maintain a uniform inflow by providing an additional pressure loss between the formation and the wellbore. ICDs delay the production of water or gas, and thus increase the ... -
Field Case Study of Drill Bit Performance Analysis in Valhall Flank West
Achmatukaev, Alan (Master thesis, 2021)This thesis will present relevant literature study, data quality assertion and performance evaluation and economic considerations based on field data from Valhall Flank West. The aim is to investigate, explain and suggest ... -
Improving drilling hydraulics estimations ‑ a case study
Ashena, Rahman; Hekmatinia, Abdol-Azim; Galambor, Ali; Aadnøy, Bernt Sigve; Enget, Charissa; Rasouli, Vamegh (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, ... -
Integrity Monitoring Methods for Producing and Plugged Wells
Berge, Unni Marina (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07)More challenging wells in sensitive areas require appropriate integrity monitoring to address the safety and environmental concerns. The purpose of this thesis was to gain an overview of the current status of well integrity ... -
Manufacturing Software Prototype for applying fuzzy MCDM in Well completion optimization
Riaz, Sarmad (Master thesis, 2021)Well completion is the important system to put the well into the production phase. This well completion engineering system is complex engineering which requires reservoir drilling, cementing of the well, installation of ... -
Modern Casing Design Optimization
Aarnes, Christian (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-15)“Working Stress Design” is the most used casing design method and has been for many years, on the Norwegian continental shelf as well as all over the globe. It is a simple method which in essence comprises of calculating ... -
MoS2 Nanoparticle Effects on 80°C Thermally Stable Water-Based Drilling Fluid
Agonafir, Mesfin Belayneh; Aadnøy, Bernt Sigve; Strømø, Simen Moe (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 ... -
Numerical investigation of the impacts of borehole breakouts on breakdown pressure
Zhang, Hua; Yin, Shunde; Aadnøy, Bernt Sigve (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 ...