Blar i UiS Brage på forfatter "Khalifeh, Mahmoud"
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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 ... -
Formation as Barrier for Plug and Abandonment of Wells
Fredagsvik, Katrine (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-06-15)To permanently plug and abandon (P&A) of drilled wells, permanent barrier(s) should be established. Cement is the primer material used for zonal isolation and permanent P&A as barrier material. However, it is recognized ... -
Formulation Development of Drilling Fluids with DOE Mixture Model Design Technique.
Aguayo, Santiago (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-07-09)The aim of this thesis study is to investigate the effect of three components of a formulation of an oil-based drilling fluid, and how the variation of the percentage of each component affects the rheological behavior of ... -
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 ... -
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 ... -
Identification and analysis of Potential Retarders for Geopolymers Designed for Well cementing
Eid, Elsayed (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-06-15)Ordinary Portland cement (OPC) is the primary material, which is used in oil well cement, isolation formation and plug and abandonment. OPC has many advantages and some limitations reviewed by different authors. The ... -
Industrial feasibility study for the use of barite as a permanent well barrier element
Bø, Eskild Muri (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 ... -
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. ... -
Investigating the Necessity of Standardized In-Situ Testing Procedures for One-Part Granite-based Geopolymers: An Experimental Study of the Influence of Loading Rate
Landaas. Stine Lise (Master thesis, 2023)Ordinary Portland cement (OPC) is the most popular choice for cementing material for petroleum well cementing. Since cement is used in the petroleum industry as an essential part of creating zonal isolation and ensuring ... -
Investigating the Necessity of Standardized In-Situ Testing Procedures for One-Part Granite-based Geopolymers: An Experimental Study of the Influence of Pore Pressure
Sandvik, Vidar Johannes (Bachelor thesis, 2023)Portland cement has been the primary binder used in well construction due to its availability, affordability, and favorable characteristics. However, alternative options are being explored due to well integrity challenges ... -
Investigation of mechanical property of aplite-based geopolymer for plug and abandonment
Obara, Integrity (Masteroppgave/UIS-TN-IPT/2016;, Master thesis, 2016-06)Historically and up to date, ordinary Portland cement (OPC) or a slight variation is the most widely used material for permanent Plug & Abandonment operation. However, there are several challenges related to cement usage. ... -
Investigation of the hydraulic integrity of cement plug: Oilwell cementitious materials
Ogienagbon, Adijat Ayobami; Khalifeh, Mahmoud (Peer reviewed; Journal article, 2023)The loss of hydraulic integrity in oil and gas wells due to the loss of cement sheath sealability can lead to environmental contamination, annular pressure build-up, and safety threats. In this study, we examine the hydraulic ... -
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 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 ... -
Multiscale insights into mechanical performance of a granite-based geopolymer: Unveiling the micro to macro behavior
Hajiabadi, Seyed Hasan; Khalifeh, Mahmoud; Van Noort, Reinier (Peer reviewed; Journal article, 2023-09)Geopolymers (GPs), based on rocks and similar (waste) materials, have shown promising features as alternatives to Ordinary Portland Cement (OPC) in many applications. The properties of these materials can be tailored to a ... -
Plug & abandonment of offshore wells: Ensuring long-term well integrity and cost-efficiency
Vrålstad, Torbjørn; Saasen, Arild; Fjær, Erling; Øia, Thomas; Ytrehus, Jan David; Khalifeh, Mahmoud (Peer reviewed; Journal article, 2019-10)There is an upcoming "P&A wave" of wells that need to be permanently plugged and abandoned, especially in mature, offshore areas such as the North Sea and Gulf of Mexico. It is important to ensure that plugged wells do not ... -
Potential Utilization of Rock-based Geopolymers for Cementing of Geothermal Wells
Mendoza Herrera, Mariel Alejandra (Master thesis, 2021)Nowadays, the reserves of fossil fuels are running low due to the large consumption. Some few start getting interested in a type of energy that is long-lasting and free of polluting emissions, and that can be found right ...