Browsing NTNU Open by Author "Elahifar, Behzad"
Now showing items 1-20 of 21
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A comparative analysis of dual drilling methods as an aim to reduce the costs of drilling
Høiland, Sean Christopher; Dafinoiu, Daniel (Bachelor thesis, 2021)De ulike konseptene for dual drilling er dual activity drilling, full dual drilling, top hole dual drilling, og dual riserless drilling er blitt gjennomgått basert på data og informasjon samlet sammen fra ulike aktører fra ... -
Application of Digitalization in Real-Time Analysis of Drilling Dynamics Using Along-String Measurement (ASM) Data Along Wired Pipes
Elahifar, Behzad; Gomar, Mostafa (Peer reviewed; Journal article, 2022)An automated drilling system requires a real-time evaluation of the drilling bit during drilling to optimize operation and determine when to stop drilling and switch bits. Furthermore, in the dynamic modeling of drill ... -
Automatisert sanntidsmålesystem av borevæskeparametere
Renaa Vandbakk, Martin; Erichsen, Eivind Nicolai (Bachelor thesis, 2021)Borevæsker brukes i alle boreoperasjoner i olje- og gassindustrien. Borevæsken bidrar til at boreoperasjonen gjennomføres på en trygg og vellykket måte. Borevæskens hovedfunksjoner er å smøre borekronen, transportere ... -
Comparison of drilling fluids (all types of drilling fluid like WBM, OBM and SBM) using in geothermal wells versus oil and gas HPHT wells (similarities and differences) during design, during operation and during connection. The comparison should take into consideration of the reason of using the mud in each category (wellbore stability, formation damage, pressure and temperature compatibility and tolerance, inhibitor compatibility, mud rheology, and etc.)
Israyilov, Bakhtiyar (Master thesis, 2022)Denne masteroppgaverapporten er skrevet med utgangspunkt i masterspesialiseringsprosjektet TPG4560. Noen av de teoretiske delene ble hentet fra fordypningsprosjektet og referansene ble lagt til de brukte delene. For å nå ... -
Cost Optimization Strategies and Methodologies for Drilling CCS Injection Wells
Skog, Andrea Johanne (Master thesis, 2023)Det nåværende globale kostnaden for karbonfangst- og lagringsteknologi (CCS) er på omtrent 600 dollar per tonn lagret CO2. Med et årlig utslipp på omtrent 431 millioner tonn, utgjør den samlede globale kostnaden for å lagre ... -
Development of bismuth-based solutions for well plugging and abandonment: A review
Hmadeh, Lewaa; Jaculli, Marcelo Anunciacao; Elahifar, Behzad; Sangesland, Sigbjørn (Journal article; Peer reviewed, 2024)Plugging and abandonment (P&A) is a crucial step of the well life cycle. Regardless of how long one stretches the productive life of a well, P&A operations will have to be carried out eventually. The current panorama of ... -
Digitalization and Automation of Plug and Abandonment Operations
Sharifov, Ayaz (Master thesis, 2022)In this thesis, the principles to design and implement software application to fully automate the Plug and Abandonment operations is discussed. The application is planned to be developed to enter the data manually from new ... -
Downsizing semi-submersible rig by using an electric BOP and riserless drilling system
Ahmadli, Mehman (Master thesis, 2021)Sammenlignet med andre sektorer er petroleumsindustrien mer konservativ for å gjøre betydelige endringer, og for å tilpasse ny teknologi. Olje- og gasselskapene foretrekker å holde seg til de tradisjonelle og velprøvde ... -
The effect of temperature on the sealability of bismuth–tin alloy plugs
Hmadeh, Lewaa; Anunciacao Jaculli, Marcelo; Vedvik, Noralf; Elahifar, Behzad; Sangesland, Sigbjørn (Journal article; Peer reviewed, 2024)Innovative solutions for plugging oil and gas wells are becoming increasingly important to ensure safe operations, save costs, and guarantee that the wells are sealed with a long-term perspective. Among these innovations, ... -
Experimental Testing and Qualification of Bismuth in the Laboratory: The Utilisation of Bismuth Plugs in Plug and Abandonment
Essén, Tora (Master thesis, 2024)Nedstengning av allerede eksisterende brønner på norsk sokkel, nye brønner som bores og de mange brønnene som må plugges på nytt, er en økende bekymring i petroleumsindustrien. Plugging av brønner er en tidkrevende og ... -
A Full Laboratory Study on the Physical and Mechanical Properties of a Bismuth Plug
Hmadeh, Lewaa; Elahifar, Behzad; Sangesland, Sigbjørn; Abrahamsen, Andreas Elmer (Chapter, 2023)Well plugging and abandonment can be very expensive, time consuming and problematic. This is because it is the least considered process during a well's life cycle. Setting a plug downhole in an efficient and successful ... -
Gas Channeling Effect for Tophole Cement Job and Methodology for Curing That (lab experiment)
Ibrahimli, Javidan (Master thesis, 2023)Sammendrag Denne masteroppgaven bygger videre på og utvider arbeidet som ble utført for spesialiseringsprosjektet TPG 4560. Flere deler av litteraturgjennomgangen i denne rapporten er hentet fra det prosjektet, med riktige ... -
Improving the Rheological and Mechanical Properties of Oil Well Cement Slurries Using Multiple Chemical Admixtures for Enhancing Zonal Isolation: A Laboratory Evaluation
Elahifar, Behzad; Hosseini, Erfan (Journal article; Peer reviewed, 2022)The study uses chemical and mineral admixtures to understand the critical processes affecting the cement slurry characteristics, including rheological properties, free water, compressive strength, and thickening time. Using ... -
Laboratory study of plugging mechanism and seal integrity in fractured formations using a new blend of lost circulation materials
Elahifar, Behzad; Hosseini, Erfan (Peer reviewed; Journal article, 2023)The problem of lost circulation occurred long during the drilling operation. Through induced and natural fractures, huge drilling fluid losses lead to higher operating expenses during the drilling. Historically, this problem ... -
Machine learning algorithm for prediction of stuck pipe incidents using statistical data: case study in middle east oil fields
Elahifar, Behzad; Hosseini, Erfan (Peer reviewed; Journal article, 2022)One of the most troublesome issues in the drilling industry is stuck drill pipes. Drilling activities will be costly and time-consuming due to stuck pipe issues. As a result, predicting a stuck pipe can be more useful. ... -
A new approach for real-time prediction of stick–slip vibrations enhancement using model agnostic and supervised machine learning: a case study of Norwegian continental shelf
Elahifar, Behzad; Hosseini, Erfan (Journal article; Peer reviewed, 2023)Efficient and safe drilling operations require real-time identification and mitigation of downhole vibrations like stick-slip, which can significantly diminish performance, reliability, and efficiency. This pioneering ... -
PlugDigitize: Developing Digital Solutions for Well Abandonment Operations
Elahifar, Behzad (Master thesis, 2024)Denne avhandlingen presenterer "PlugDigitize," et nyskapende digitalt rammeverk designet for å optimalisere operasjoner for nedleggelse av brønner i olje- og gassindustrien. Med fokus på den kritiske fasen av sementplugg ... -
Real-time detection of drilling problems & issues during drilling by listing & using their signs both on the surface and downhole
Hafezi, Salar (Master thesis, 2023)Olje- og gassindustrien er allment anerkjent som en av de farligste sektorene globalt. Prosessen med å utvinne hydrokarboner fra underjordiske reservoarer innebærer betydelige risikoer og usikkerheter. Det er derfor ... -
A Sealability Study on Bismuth-Tin Alloys for Plugging and Abandonment of Wells
Hmadeh, Lewaa; Manataki, Andriani; Anunciacao Jaculli, Marcelo; Elahifar, Behzad; Sangesland, Sigbjørn (Journal article; Peer reviewed, 2024)The use of bismuth alloys as a barrier material for plugging and abandonment (P&A) has gained traction in the literature due to the large number of wells scheduled to be plugged and abandoned. In addition, many questions ... -
Simulation of Pressure Pulses in Top-hole Cementing Operations
Refsnes, Endre (Master thesis, 2020)Denne masteroppgaven undersøker utviklingen av trykkpulser i topphullseksjoner, frembrakt fra utstøting av sementplugger under sementeringsoperasjoner. Topphull refererer i denne sammenheng til de øverste seksjonene av en ...