Blar i Publikasjoner fra CRIStin på forfatter "Aadnøy, Bernt Sigve"
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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 ... -
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, ... -
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 ... -
Optimizing the separation factor along a directional well trajectory to minimize collision risk
Khosravanian, Rasool; Mansouri, Vahid; Wood, David A.; Aadnøy, Bernt Sigve (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 ... -
Real-Time Minimization of Mechanical Specific Energy with Multivariable Extremum Seeking
Nystad, Magnus; Aadnøy, Bernt Sigve; Pavlov, Alexey (Peer reviewed; Journal article, 2021)Drilling more efficiently and with less non-productive time (NPT) is one of the key enablers to reduce field development costs. In this work, we investigate the application of a data-driven optimization method called ... -
Selection of Optimal Well Trajectory Using Multi-Objective Genetic Algorithm and TOPSIS Method
Yavari, Hossein; Qajar, Jafar; Aadnøy, Bernt Sigve; Khosravanian, Rasool (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 ...