Now showing items 359-378 of 2527

    • Calculation and Visualization of Energy Dissipation and Energy Balance in Reservoir Models 

      Berylian, Fadhil (Master thesis, 2020)
      During the production lifetime of a hydrocarbon reservoir, various forms of energy are involved: external energy through wells, internal energy stored in the reservoir itself, and dissipated energy as heat released to the ...
    • Calculation of acoustic wave velocities based on digital rock models 

      Bakke, Andrine (Master thesis, 2021)
      Beregning av bølgehastigheter basert på μCT-bilder av bergarter kan gi verdifull kunnskap som kan brukes ved tolkning av seismisk data. For å sammenligne hastighetsresultatene fra en avlastet kjerneprøve med petrofysiske ...
    • Caledonian structural, metamorphic and magmatic evolution of the Rödingsfjället Nappe Complex 

      Fløan, Gaute Moe (Master thesis, 2022)
      Rödingsfjälldekkekomplekset og Helgelanddekkekomplekset utgjør de to store komponentene i øverste allokton og består av bergarter med både oseanisk og kontinental affinitet som representerer den ytterste marginen av ...
    • Can Heating Induce Borehole Closure? 

      Xie, Xiyang; Bauer, Andreas; Stenebråten, Jørn; Bakheim, Sigurd; Lavrov, Alexandre; Fjær, Erling; Kristiansen, Tron Golder (Peer reviewed; Journal article, 2020)
      The current study shows that heating a cased borehole in low-permeability shale rock can induce plastic deformation, leading to the closure of the casing annulus and decreasing annulus connectivity. The thermally induced ...
    • Can heating-induced creep result in shale barriers for P&A applications? 

      Bauer, Andreas Kurt Marcel; Stenebråten, Jørn; Li, Liming; Fjær, Erling (Chapter, 2017)
      It has been shown that some shale formations form barriers around a casing of a well due to shale creep that results in closure and sealing of the annulus around the casing. The existence of such shale barriers facilitates ...
    • Capacity Enhancement in Rock and Tunnel Engineering in Nepal 

      Panthi, Krishna Kanta (Journal article, 2022)
      In the recent past, infrastructure development activities have gained momentum in Nepal. Many roads are being and will be upgraded to enhance transport efficiency. The hydropower development activities are in full momentum. ...
    • The capacity of creeping shale to form an annular barrier 

      Brendsdal, Are Olav Eriksen (Master thesis, 2017)
      This report was written in Pau, France, as part of an internship in Total E&P Drilling & Wells Division, Geomechanics Entity, under supervision of Kun Su. Shale displacing inwards in the wellbore is a well-recognized ...
    • Capillary washboarding during slow drainage of a frictional fluid 

      Thorens, Louison; Måløy, Knut Jørgen; Flekkøy, Eirik Grude; Sandnes, Bjørnar; Bourgoin, Mickaël; Santucci, Stephane F A (Peer reviewed; Journal article, 2023)
      Numerous natural and industrial processes involve the mixed displacement of liquids, gases and granular materials through confining structures. However, understanding such three-phase flows remains a formidable challenge, ...
    • Carbon Dioxide Saturation Estimates at Sleipner Using Seismic Imaging and Rock Physics Inversion 

      Dupuy, Bastien; Romdhane, Anouar; Eliasson, Peder; Yan, Hong; Torres Caceres, Veronica Alejandra; Querendez, Etor; Ghaderi, Amir (Chapter; Peer reviewed, 2017)
      We present an integrated approach combining Full-Waveform Inversion and rock physics inversion to estimate CO2 saturation at Sleipner. Acoustic FWI provides high-resolution P-wave velocity images where the uncertainty is ...
    • Case Study - Business Mapping to Improve Quality of the Well Delivery Process 

      Jenssen, Jens Erich (Master thesis, 2012)
      The importance of building a robust oil and gas company is currently more relevant than ever. Volatile oil prices, challenging governmental relations and uncertain outcomes of exploration activities are all elements affecting ...
    • Case study of crosshole GPR tomography for grouting distribution in rock fractures 

      Bazin, Sara; Kvistedal, Yme Asgeir; Anschütz, Helgard; Tunbridge, Lloyd; Jankowski, Pawel; Fannian, K.; Strømsvik, Helene; Grøv, Eivind (Chapter, 2018)
      The Nordic method for tunnelling consists of drill and blast, pre-grouting and rock support adapted to the geologic conditions. Extensive use of pre-grouting is normally applied to limit water leakage. The injection is ...
    • A case study on time-dependent bedding plane failure 

      Asaka, Michinori; Holt, Rune Martin (Journal article; Peer reviewed, 2023)
      Time-delayed wellbore failures are often observed in shale formation. In some cases, cavings indicating bedding plane failure are observed a few days after initial drill-out with a gradual increase, eventually leading to ...
    • Casing Design and Barriers Related to Shallow Gas 

      Langva, Anders (Master thesis, 2011)
      The top hole section in an offshore well is conventionally drilled riserless utilizing seawater with high viscosity sweeps for cuttings removal. In recent years, the possibility of eliminating the pilot hole and setting ...
    • Casing Wear: Analysis of Field Experience and Current Models 

      Kjellevoll, Ingrid Solberg (Master thesis, 2013)
      Accurate casing wear prediction is important for well integrity evaluations.Some advanced well constructions have the casing exposed to reservoir fluidsand these casings are often in chrome material for corrosion resistance. ...
    • CDF study of two-phase flow in helico-axial pump stage 

      Mata García, Rodrigo (Master thesis, 2018)
      Pumping is an essential part of the process of several industries. Pumping and processing fluids with different properties have revealed to be among the major challenges in the last decades. In the oil and gas industry, ...
    • Cement Displacement Efficiency in Rough Pipes 

      Johansen, Espen; Giil, Gunnar Lia (Master thesis, 2017)
      Research within casing string cementing is important in the oil industry. The integrity of an oil well is dependent on the quality of the cement job, and a poor cement job can put the environment, company economics and ...
    • Cement Displacement Efficiency in Smooth and Rough Pipes - An Experimental and Theoretical Investigation 

      Mehari, Mehari Redae (Master thesis, 2016)
      Researches in the industry have always ascertained that mud channels affect the two principal objectives of primary cement job; zonal isolation and structural support. This can lead to envi- ronmentally, operationally ...
    • Cement Plug Integrity for Well Abandonment 

      Corina, Anisa Noor (Doctoral theses at NTNU;2020:30, Doctoral thesis, 2020)
      Permanent abandonment marks the end of the life of an oil or gas well. Accordingly, the penetrated formation must be isolated, preventing fluid flow to the surface or surrounding formation, with a purpose to give long-term ...
    • Cement Sheath Integrity During Thermal Cycling 

      Andrade, Jesús De (Doctoral thesis at NTNU;2015:291, Doctoral thesis, 2015)
      In the construction process of oil and gas wells, primary cementing constitutes a critical procedure of placing a cement sheath in the annulus between casing and formation, or between the casing strings. The main purpose ...
    • Cement sheath modification using nanomaterials for long-term zonal isolation of oil wells: Review 

      Jafariesfad, Narjes; Geiker, Mette Rica; Gong, Yi; Skalle, Pål; Zhang, Zhiliang; He, Jianying (Journal article; Peer reviewed, 2017)
      Well cementing is an important operation during drilling and completion of oil wells. The cement sheath must maintain well integrity behind the casing and provide long-term zonal isolation to ensure safety and prevent ...