Blar i UiS Brage på forfatter "Agonafir, Mesfin Belayneh"
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An End-To-End Machine Learning Project for Detection of Stuck Pipe Symptoms During Tripping Operations
Pacis, Felix James (Master thesis, 2021)Non-productive time due to stuck pipe costs the Oil and Gas industry substantial losses amounting to $250 million annually [1]. Thus, it is imperative for companies to invest in tools that can aid in prevention. This study ... -
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 ... -
Effect of Iron Oxide Nanoparticles on the Properties of Water-Based Drilling Fluids
Alvi, Muhammad Awais Ashfaq; Agonafir, Mesfin Belayneh; Bandyopadhyay, Sulalit; Minde, Mona Wetrhus (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 ... -
Effect of nanoparticles on properties of geopolymers designed for well cementing applications
Alvi, Muhammad Awais Ashfaq; Khalifeh, Mahmoud; Agonafir, Mesfin Belayneh (Peer reviewed; Journal article, 2020)Recently the focus of the oil and gas industry is to find the alternative material for well barrier applications. Geopolymers are among the suggested materials, which could be used in the future to solve the well integrity ... -
Effect of SiO2 and SiO2/TiO2 hybrid nanoparticles on cementitious materials
Kakay, Samdar; Nori, Jiwar; Agonafir, Mesfin Belayneh (Peer reviewed; Journal article, 2021)In this paper, we report the effect of SiO2 nanoparticle solution on the properties of the neat industry and environmental cements. Moreover, the hybrid SiO2/TiO2 nanoparticles solution impact on the Portland G-class cement. ... -
Effects of Nanoparticles on the Neat Geopolymer: Experimental, Economic and Environmental Impact Studies
Nori, Jiwar (Master thesis, 2023)In the oil and gas industry, cement is used for well construction and plug abandonment operations acting as a barrier element. According to NORSOK D-10, the well should be designed to control undesired flow from the reservoir ... -
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 ... -
Nano-based Elastomer Swelling Agent
Kam, Iris Sok Yee (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-06)With multistage hydraulic fracturing and extended reach wells becoming increasingly common, the need for effective annular zonal isolation has become paramount. In such wells, swell packers are being preferred over traditional ... -
New Simple Analytical Surge/Swab Pressure Model for Power-Law and Modified Yield-Power-Law Fluid in Concentric/Eccentric Geometry
Mohammad, Amir; Agonafir, Mesfin Belayneh (Peer reviewed; Journal article, 2023)The axial movement of pipe in and out of the well generates positive (surge) and negative (swab) pressures that will impact the well pressure. When the swab and surge effects cause well pressures outside the allowable ... -
Physics-Based Swab and Surge Simulations and the Machine Learning Modeling of Field Telemetry Swab Datasets
Mohammad, Amir; Agonafir, Mesfin Belayneh; Davidrajuh, Reggie (Peer reviewed; Journal article, 2023)Drilling operations are the major cost factor for the oil industry. Appropriately designed operations are essential for successful drilling. Optimized drilling operations also enhance drilling performance and reduce drilling ... -
Plug and Abandonment Technologies evaluation and Experimental material testing.
Al Fadel, Marwan Fadel (Master thesis, 2023)Abstract The conventional method to plug and abandonment (P&A) is characterized by its time-consuming nature, high costs, and associated challenges and risks related to Health, Safety, and Environment (HSE) considerations. ... -
Pressure Build-Up in Closed Wells During Kick Migration and Fluid Compressibility Effects
Agonafir, Mesfin Belayneh; Petersen, Johnny; Fjelde, Kjell Kåre (Chapter, 2022)If a kick is migrating in a closed well, this will lead to pressures building up in the well. It has earlier been shown that for Non-Newtonian fluids, suspension effects will make it impossible to deduce a unique gas ... -
The Effect Of MoS2 -And Graphene Nanoparticles On The Properties & Performance Of Polymer /Salt Treated Bentonite
Agonafir, Mesfin Belayneh; Wrobel, Stanislaw (Journal article; Peer reviewed, 2017)Among others, properly designed drilling fluid is a key for a success of drilling operation. The rheology, and lubricity of drilling fluids control the hydraulics, hole cleaning and the mechanical friction between string ... -
The Effect Of Titanium Nitride(TiN) Nanoparticle On The Properties & Performance Bentonite Drilling Fluid
Agonafir, Mesfin Belayneh; Berg, Vegard (Journal article; Peer reviewed, 2017)In recent years, the application of nano technology is attracting the oil and gas industry. Nanomaterials research results show an improving result of cement, drilling fluid and Enhanced Oil Recovery. In this paper, the ...