Now showing items 1-20 of 102

    • A new approach to dynamic barite sag analysis on typical Field oil-based drilling fluid 

      Ofei, Titus Ntow; Lund, Bjørnar; Saasen, Arild; Sangesland, Sigbjørn; Gyland, Knud Richard; Linga, Harald (Chapter, 2019)
      Laboratory and field experiences record that sagging of weighting agents such as barite in drilling fluids is often worse in dynamic conditions, e.g. pumping, tripping or drill pipe rotation, than in static conditions. ...
    • A Novel Tool for Cement Evaluation 

      Fagerås, Sondre Jakobsen (Master thesis, 2017)
      The annular casing cement is an important part of the well barrier throughout the life cycle of a well. With the increasing number of plug and abandonment (P&A) operations, increased attention is now given to annular cement ...
    • A Study of a Subsea Chemicals Storage & Injection-Station 

      Lundal, Vegard; Festøy, Sigurd van Dijk (Master thesis, 2017)
      Total and Doris have announced that they want to challenge the way of thinking of how to supply subsea field developments with chemicals. With a Subsea Chemicals Storage & Injection-station (SCS&I) the chemicals are injected ...
    • A Study of How to Implement Alternative Well Plugging Materials in Governing Regulations 

      Skjeldestad, Fredrik (Master thesis, 2012)
      The governing requirements and regulations for petroleum activities on the Norwegian Continental Shelf (NCS) refers to the industry standard NORSOK D-010 for technical and functional requirements for Plug & Abandonment ...
    • Advanced Casing Design Model - Buckling of Casing in Washed Out Sections 

      Stensrød, Hanne (Master thesis, 2016)
      Casing design for a well is based on an investigation of all possible loads the well can experience during its lifetime. A thesis model has been made in Excel based on the equations and assumptions given in literature; ...
    • Advanced Casing Wear Model 

      Teigland, Andreas (Master thesis, 2017)
      Casing wear prediction is an important part of a well integrity assessment. Reduction in the thickness of the casing wall as a result of various wellbore operations can cause significant reduction in burst and collapse ...
    • Advanced Positioning for Offshore Norway 

      Sahl, Thomas Alexander (Master thesis, 2014)
      Most of the computation involved in the planning of a new well is done by software. Software such as Landmark, Drilling Office X, etc. These softwares handle everything from the well placement to analysis of hydraulics, ...
    • Advanced Temperature Model for HPHT Conditions 

      Løbergsli, Knut Vegard (Master thesis, 2015)
      Temperature changes of wells are analyzed in this Thesis. Wells need to be designed for all planned operations in order to maintain well integrity for the well life. Well barriers need to be numerically assessed for ...
    • Advanced Temperature Modelling for Two-Phase Flow 

      Kjellevoll, Erling Solberg; Raaen, Bjørnar (Master thesis, 2016)
      This thesis presents an advanced model for temperature predictions of a producing well. With today s low oil price, cost reduction has become paramount for many big oil companies. One way of reducing operational costs are ...
    • Advanced Tubing Design - Temperature Modeling 

      Lervik, Øystein (Master thesis, 2016)
      In casing and tubing design, one of the most important aspects is to make the well safe for operation. This includes many complex areas that need thorough understanding, with one being temperature prediction. This is a ...
    • Alternative Methods for Tubing Removal 

      Sætre, Stian (Master thesis, 2014)
      When the production from a well is no longer profitable, the options are to either permanently plug and abandon (P&A) the well, or to re-use the slot by plugging the original well and sidetrack a new wellbore (slot recovery). ...
    • An Evaluation of Open Hole Zonal Isolation Solutions on Valhall 

      Nilsen Sivertsen, Ørjan (Master thesis, 2012)
      The Valhall field, operated by BP Norge, is a mature field in the North Sea requiring more attention than before to be able to maintain a viable production rate. Keeping the rate sufficient is ultimately done, in simple ...
    • An Experimental Study of Gas Migration in Pressurized Fluids 

      Tønnessen, Tonje Garpestad (Master thesis, 2019)
      Boring med begrenset operativ slam-margin gjennom karstifiserte karbonatformasjoner som består av sprekker og hulrom fra en flyter offshore, kan potensielt føre til tapt sirkulasjon og gassinnstrømning. Konvensjonelle ...
    • An Investigation into the Feasibility of Using Non-Metallic Materials for Construction Elements for Subsea Production Systems 

      Stange, Leif Even (Master thesis, 2014)
      Installation of seabed equipment represents approximately one third of the capital expenditures (CAPEX) for subsea developments. This report is based on investigating into new designs of subsea production system (SPS) ...
    • Analysis of Compact Separation Systems and Experimental Study of Centrifugal Separation in Helically Coiled Pipes 

      Vidnes, Jonas; Engvik, Sverre Andre (Master thesis, 2015)
      The offshore petroleum industry is experiencing challenges as exploration and production are forced towards remote and deep reservoirs, combined with high cost-efficiency demands. Topside facilities struggle with limited ...
    • Analysis of Drilling Loads in Advanced Casing Design 

      Østvedt, Johan Holm (Master thesis, 2015)
      Casing design planning has during the last decades developed from manual calculations performed by the engineer himself, to the use of advanced simulation tools. The tools have become increasingly advanced, allowing the ...
    • Analysis of methods for effective well plug and abandonment (P&A) 

      Fiskkjønli, Eirik (Master thesis, 2013)
      This thesis will focus on plug and abandonment of wells, highlighting the requirements given to safely perform the operation, different procedures used to plug and abandon a well, tools used in the process of abandonment ...
    • Analysis of Stick-Slip Effects During Oil-Well Drilling 

      Zhao, Dapeng (Doctoral theses at NTNU;2017:127, Doctoral thesis, 2017)
      The drilling operation is a costly portion of the upstream petroleum industry. It is worth making efforts to reduce unwanted non-productive time (NPT), which is often induced by downhole problems during drilling. In this ...
    • Analysis of Well Design for Effective P&A of Production Wells 

      Bugge-Mahrt, Jørgen Haakon Juan Antoni (Master thesis, 2012)
      Plugging and Abandonment (P&A) has long been given little im- portance in the oil industry as the activity does not generate values, and preparing for it to be efficiently carried out was overshadowed by the interest of ...
    • An Analysis on Drillstring Vibration - A novel approach to detecting Forward Synchronous Whirl 

      Saraswat, Aditya (Master thesis, 2016)
      Operators acknowledge the value of investment in controlling drilling dynamics. Decrease in crude oil prices limits the investment on measurement tool competences. Thus, it is necessary to address the drilling dynamics ...