Now showing items 21-30 of 30

    • Shale as a Permanent Barrier after Well Abandonment 

      Folstad, Jon Steinar (Master thesis, 2015)
      During the lifetime of petroleum wells, the purpose of the well barrier elements is to ensure well integrity within the short and long time frame while it is exposed to its surrounding environment. Leakages of the sealing ...
    • Shale Creep as Leakage Healing Mechanism in CO2 Sequestration 

      Cerasi, Pierre; Lund, Elisabeth; Kleiven, Marta Laukeland; Stroisz, Anna Magdalena; Pradhan, Srutarshi; Kjøller, Claus; Frykman, Peter; Fjær, Erling (Journal article; Peer reviewed, 2017)
      Experiments on shale specimens targeted creep deformation in order to investigate whether this mechanism could be relied upon to close fractures and stop leakage near injection wells. Uniaxial compression tests were conducted ...
    • Skempton's A – A key to man-induced subsurface pore pressure changes 

      Holt, Rune Martin; Bakk, Audun; Stenebråten, Jørn; Bauer, Andreas; Fjær, Erling (Chapter, 2018)
      Fluid production from or injection into a subsurface reservoir leads to stress pressure changes inside and outside the reservoir. The overburden often consists of low permeability shale, and the undrained pore pressure ...
    • Small Scale Tests of Creep in Pierre Shale 

      Guan, Anna Kay Ying (Master thesis, 2016)
      The impressive scope of using shale as a permanent well barrier for plug and abandonment (P&A) operations has lately gained much attention in the petroleum industry. Shale is observed to have a natural self-sealing effect ...
    • SPE-174356-MS Effect of Rock Anisotropy on Integrated Modelling 

      Li, Liming; Bakk, Audun; Fjær, Erling; Bauer, Andreas; Stenebråten, Jørn; Holt, Rune Martin (Chapter, 2015)
      Associated with reservoir monitoring towards optimizing production of oil and gas and maximizing the recovery, or ensuring safe CO2 storage, it may be beneficial to introduce integrated geomechanics, rock physics and seismic ...
    • Static and Dynamic Characterization of a Deep Overburden Shale 

      Bakk, Audun; Stenebråten, Jørn; Lozovyi, Serhii; Bauer, Andreas; Sønstebø, Eyvind Frode; Fjær, Erling; Bhuiyan, Mohammad Hossain; Chakraborty, Samarjit; Holt, Rune Martin (Chapter, 2018)
      Since shales are the far most abundant overburden formation, understanding the geomechanical and rock physics behavior of shales is essential. We discuss a particular deep overburden shale in light of a thorough static and ...
    • Stress-Induced Fracturing of Reservoir Rocks: Acoustic monitoring and uCT Image Analysis 

      Pradhan, Srutarshi; Stroisz, Anna Magdalena; Fjær, Erling; Stenebråten, Jørn; Lund, Hans Karl; Sønstebø, Eyvind Frode (Journal article, 2015)
      Stress-induced fracturing in reservoir rocks is an important issue for the petroleum industry. While productivity can be enhanced by a controlled fracturing operation, it can trigger borehole instability problems by ...
    • Thermal Stimulation of Shale Barriers 

      Stavland, Simon Thorbjørnsen (Master thesis, 2017)
      Some shale sections in petroleum wells have shown to form effective annular barriers with the casing due to creep. These barriers are now acknowledged by the petroleum safety authority of Norway as verified well barrier ...
    • Time-dependent closure of a borehole in a viscoplastic rock 

      Xie, Xiyang; Fjær, Erling; Detournay, Emmanuel (Journal article; Peer reviewed, 2019)
      The paper describes a model to predict and analyze the time-dependent closure of a borehole drilled in a soft rock subjected to an initial isotropic stress, and the build-up of stress on a rigid casing after contact with ...
    • Time-Dependent Deformation of Rock Around a Borehole 

      Xie, Xiyang (Doctoral theses at NTNU;2019:281, Doctoral thesis, 2019)