Blar i Faculty of Science and Technology på tittel

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    • Welding procedure qualification record (WPQR) for welds fabricated at proximity 

      Bhardwaj, Sachin; RATNAYAKE MUDIYANSELAGE, Chandima (Peer reviewed; Journal article, 2022)
      Maintaining the minimum allowable distance between proximity welds has always been considered a subject of debate among design engineers, welding engineers/inspectors and fabricators/engineering contractors. The scattered ...

    • Well Barrier Restoration Across Dual Cemented Liners 

      Skoge, Charlotte (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-06)
      In the past years there has been an increased focus on decommissioning of wells in the NCS. Decommissioning of wells introduces significant investments with no financial returns and has for those reasons historically had ...

    • Well collapse modeling & Norne & Heidrun well instability sensitivity studies 

      Buan, Irene (Masteroppgave/UIS-TN-IPT/2015;, Master thesis, 2015-06-15)
      Well collapse is a typical wellbore instability problem in brittle shale and unconsolidated formations. In this thesis, the thermal, chemical, mechanical, hydraulic, elastic and transient effects on the well collapse ...

    • Well control analysis in conventional and riserless reelwell method 

      Utheim, Marit (Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-10)
      The oil industry is nowadays facing several problems as hydrocarbon reserves are declining and challenging areas are forced to explore. Deepwater drilling is one of these challenging areas as increased target depth results ...

    • Well control and training scenarios 

      Hamarhaug, Marianne (Masteroppgave/UIS-TN-IPT/2011;, Master thesis, 2011)
      Well control is needed during drilling operations to maintain a stable and safe well. Moving towards deeper wells with higher pressures and temperatures makes the operational working window smaller and more complicated ...

    • Well control considerations in Arctic drilling 

      Kjær, Linn Kristin (Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-13)
      As the petroleum industry is in a constant move north for new exploration and production areas, both challenges and opportunities are many. The vast majority of the northern hemisphere are characterized by low temperatures, ...

    • Well control during extended reach drilling - conventional drilling compared to the reelwell drilling method 

      Veisene, Audun Tufte (Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-15)
      Well control is always of great importance during well operations. The main purpose of well control is to keep downhole pressures in the operating window between pore and fracture pressure. In the case of a well control ...

    • Well control procedures and simulations 

      Litlehamar, Harald (Masteroppgave/UIS-TN-IPT/2011;, Master thesis, 2011)
      A brief introduction is given to a range of well control procedures. It was found that many of the procedures rely on a set of simplifying assumptions. This is particularly true in the hand calculations for designing a ...

    • Well decommissioning using BHGE's subsea wellhead terminator 

      Aasen, Andre; Stavland, Sander (Masteroppgave/UIS-TN-ISØP/2019;, Master thesis, 2019-06)
      The world’s portfolio of oil and gas wells are ageing. Plug and abandonment is the final and inevitable stage of every well. As a result, decommissioning is set to grow steadily in the coming years, as more and more wells ...

    • Well design considerations for CO2 injection at Prelude 

      Haugstad, Stig Bjoeran (Masteroppgave/UIS-TN-IPT/2011;, Master thesis, 2011-06-15)
      The global economy is set to grow four-fold by 2050, promising economic benefits and a higher standard of living for millions. At the same time the global community is uniting in an effort to combat global warming. Achieving ...

    • Well Design With an Environmental Focus 

      Karlsen, Denise (Masteroppgave/UIS-TN-IEP/2020;, Master thesis, 2020-08)
      The decisions made during well planning have mainly been focused on safety, cost efficiency and applicability of the design. As the climate have been getting more attention the past years, environment is now high up on the ...

    • Well engineering simulation (WellPlanTM) challenges and uncertainties in drilling engineering 

      Vazquez Taboada, José (Student paper, others, 2014-05-20)
      The report work on this laboratory simulation, will be simulated a Drilling Operation to identify the challenges that this operation carries, and how to mitigated them. Nowadays, the high demand by Operators to drill ...

    • Well Modelling of H2S Production on a Field in the North Sea 

      Mburu, Andrew (Masteroppgave/UIS-TN-IEP/2018;, Master thesis, 2018-06)
      Hydrogen sulphide production can prove to be a very costly affair for exploration and production companies. Failure to implement efficient H2S control and mediation strategies can lead to a decrease in production assets, ...

    • Well monitoring from om-the-fly analysis of data from Permanent Downhole Gauges (PDGs) 

      Cadena Zetina, Juan Manuel (Masteroppgave/UIS-TN-IER/2019;, Master thesis, 2019-06-15)
      The thesis focuses on time-lapse Pressure Transient Analysis (PTA) of data acquire with Permanent Downhole Gauges (PDGs). The objective is to develop and test approaches in automation of time-lapse PTA. Helping in providing ...

    • Well P&A Tubing Compaction Method Evaluation and Modelling 

      Assaf, Osama (Masteroppgave/UIS-TN-IPT/2017;, Master thesis, 2017-07-13)
      The number of aged fields in the North Sea is increasing, and in few years, and there will be a significant increase in number of wells that need to be permanently plugged and due to low oil prices and other reasons, there ...

    • Well stability in shale formations 

      Tariq, Abdullah (Masteroppgave/UIS-TN-IPT/2014;, Master thesis, 2014-06-16)
      Well instability in shale formations has been a very major problem due to physiochemical interactions between drilling fluid and formation. In this thesis, chemical, thermal and diffusion effects on the well collapse ...

    • Wellbore Collapse Failure Criteria and Drilling Optimization 

      Tranggono, Hadi (Masteroppgave/UIS-TN-IEP/2019;, Master thesis, 2019-06-15)
      Design and planning in drilling a well are a key for successful before to execute drilling operation. A good understanding of wellbore stability, design mud, casing, cementing, BHA & drillstring, drilling bit, hole cleaning ...

    • Wellbore stability analysis for an extended-reach well on Ekofisk 

      Diaz Lopez, Jairo Alexander (Master thesis, 2022)

    • Wellbore stability and rock mechanics study on the Ula field 

      Immerstein, Tonje (Masteroppgave/UIS-TN-IPT/2013;, Master thesis, 2013-06-20)
      In the years to come more challenging drilling conditions will occur when the last reserves need to be collected. More directional drilling will be used and good wellbore conditions will be necessary to make this possible. ...

    • Wellhead Fatigue Analysis : Surface casing cement boundary condition for subsea wellhead fatigue analytical models 

      Reinås, Lorents (;163, Doctoral thesis, 2012-05-31)
      Material fatigue is a failure mode that has been known to researchers and engineers since the 19th century. Catastrophic accidents have happened due to fatigue failures of structures, machinery and transport vehicles. ...