Browsing Universitetet i Stavanger by Author "Saasen, Arild"
Now showing items 21-40 of 56
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Efficient Removal of Magnetic Contamination from Drilling Fluids – The Effect on Directional Drilling
Saasen, Arild; Poedjono, Benny; Ånesbug, Geir Olav; Zachman, Nicholas (Peer reviewed; Journal article, 2020-10)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 ... -
Efficient Removal of Magnetic Contamination from Drilling Fluids – The Effect on Directional Drilling
Saasen, Arild; Poedjono, Benny; Ånesbug, Geir Olav; Zachman, Nicholas (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 Bench-Scale Study on Cuttings-Bed Erosion in Horizontal Wells
Pedrosa Consicion, Herman Camilo; Lund, Bjørnar; Opedal, Nils van der Tuuk; Ytrehus, Jan David; Saasen, Arild (Peer reviewed; Journal article, 2022)Cuttings-beds formation while drilling wellbores is a common challenge, especially for horizontal wells, as drilled particles have higher area to be deposited and form cuttings-beds, which can cause several problems such ... -
Experimental investigation of fracture width limitations of granular lost circulation treatments
Alsaba, Mortadha; Nygaard, Runar; Saasen, Arild; Nes, Olav-Magnar (Journal article; Peer reviewed, 2016-01)Drilling fluid losses into fractured shales is a major challenge. Lost circulation treatments are widely applied to mitigate the losses; however, the effectiveness of these treatments is affected by different physical ... -
Experimental Methods for Investigation of Drilling Fluid Displacement in Irregular Annuli
Lund, Bjørnar; Taghipour, Ali; Ytrehus, Jan David; Saasen, Arild (Peer reviewed; Journal article, 2020)Experimental methods are still indispensable for fluid mechanics research, despite advancements in the modelling and computer simulation field. Experimental data are vital for validating simulations of complex flow systems. ... -
Experimental Study of Hydraulic Sealability and Shear Bond Strength of Cementitious Barrier Materials
Kamali, Mohammadreza; Khalifeh, Mahmoud; Eid, Elsayed; Saasen, Arild (Peer reviewed; Journal article, 2021-06)In this experimental study, two different cementitious materials, including (i) a class of expansive cement currently used for plug and abandonment (P&A) operations and (ii) a non-cement-based naturally occurring rock, ... -
The fate of hydrocarbon leaks from plugged and abandoned wells by means of natural seepages
Tveit, Mari Røstvig; Khalifeh, Mahmoud; Nordam, Tor; Saasen, Arild (Peer reviewed; Journal article, 2020-10)When a well reaches the end of its productive life, it is permanently plugged and abandoned. Even though new technology and verification methods are being evaluated, it is evident that operational, barrier material and ... -
The Fundamental Principles and Standard Evaluation for Fluid Loss and Possible Extensions of Test Methodology to Assess Consequences for Formation Damage
Klungtvedt, Karl Ronny; Saasen, Arild; Vasshus, Jan Kristian; Trodal, Vegard Bror; Mandal, Swapan Kumar; Berglind, Bjørn; Khalifeh, Mahmoud (Peer reviewed; Journal article, 2021-04)Industry testing procedures such as ANSI/API 13B-1 describe a method for measuring fluid loss and studying filter-cake formation against a medium of either a filter paper or a porous disc, without giving information about ... -
Fundamentals and physical principles for drilled cuttings transport – Cuttings bed sedimentation and erosion
Pedrosa, Camilo; Saasen, Arild; Ytrehus, Jan David (Peer reviewed; Journal article, 2021)The increasing necessity of challenging wellbore structures and drilling optimization for improved hole cuttings cleaning has been growing along time. As a result, operator companies have been researching and applying ... -
Gel Pills for Downhole Pressure Control during Oil and Gas Well Drilling
Khalifeh, Mahmoud; Penkala, Larisa; Saasen, Arild; Aase, Bodil; Omland, Tor Henry; Taugbøl, Knut; Reinås, Lorents (Peer reviewed; Journal article, 2020)During drilling of petroleum or geothermal wells, unforeseen circumstances occasionally happen that require suspension of the operation. When the drilling fluid is left in a static condition, solid material like barite may ... -
Hole cleaning and wet-granular rheology of rock cutting beds: Impact of drilling fluid composition
Pedrosa, Camilo; Saasen, Arild; Ytrehus, Jan David (Peer reviewed; Journal article, 2022)Cuttings-beds formation is an issue that must be considered during all wellbore drilling operations. This problem increases at highly deviated or horizontal wells, where cuttings removal efficiency becomes one of the most ... -
Hydraulic Behavior in Cased and Open Hole Sections in Highly Deviated Wellbores
Ytrehus, Jan David; Lund, Bjørnar; Taghipour, Ali; Kosberg, Birgitte Ruud; Carazza, Luca; Gyland, Knud Richard; Saasen, Arild (Chapter, 2019)In this paper we present results from flow loop experiments with an oil-based drilling fluid with micronized barite as weight materials. The use of micronized barite allows using lower viscosity drilling fluid, providing ... -
Impact of Mud Contamination on Performance of Granite-Based Geopolymers
Khalili, Pouya (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. ... -
Input Selection for Dimensionless Shear Rates in Herschel-Bulkley and Power-Law Models
Brasileiro, Raoni (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 ... -
Instituting Retarders for Geopolymers Developed for Downhole Applications
Chamssine, Fawzi (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. ... -
Invasion of CaCO3 particles and polymers into porous formations in presence of fibres
Klungtvedt, Karl Ronny; Saasen, Arild (Peer reviewed; Journal article, 2022)Formation damage can occur through migration of drilling fluid particles and polymers into porous formations. A methodology for assessing formation damage was applied to measure invasion of CaCO3 and polymers into porous ... -
Materials for optimized P&A performance: Potential utilization of geopolymers
Khalifeh, Mahmoud (PhD thesis UiS;292, Doctoral thesis, 2016-05)When a well reaches the end of its life-cycle, it must be permanently plugged and abandoned. Plug and abandonment (P&A) can easily contribute with 25% of the total drilling costs of exploration wells offshore Norway. The ... -
Materials for Well Integrity: Performance of Setting Materials for Well Cementing Operation
Kamali, Mohammadreza (PhD thesis UiS;642, Doctoral thesis, 2022-05)Primary cementing operation is the process of pumping and placing a cementitious slurry in a well. After setting, the so-called barrier material has to provide zonal isolation in the annular gap behind casing string. After ... -
Measuring filter-cake cohesive strength and flowability
Klungtvedt, Karl Ronny; Pedrosa, Camilo; Saasen, Arild (Peer reviewed; Journal article, 2022)The filter-cake has a critical role in temporarily reducing the permeability of the wellbore to prevent issues such as lost circulation, formation damage, wellbore collapse and differential sticking. The filter-cake's ... -
Measuring the Magnetic Content of Drilling Fluid
Khalili, Pouya (Master thesis, 2021)Magnetic contamination of drilling fluid can impact the accuracy of the directional surveying by shielding the magnetic field. Additionally, this contamination, such as swarf or finer magnetic particles, can agglomerate ...