• 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 ...
    • Static and dynamic stiffness measurements with Opalinus Clay 

      Lozovyi, Serhii; Bauer, Andreas (Journal article; Peer reviewed, 2018)
      In this work, an experimental study was carried out with the aim of reconciling static and dynamic stiffness of Opalinus Clay. The static and dynamic stiffness of core plugs from a shaly and a sandy facies of Opalinus Clay ...
    • Stress Path Dependent Velocities in Shales: Impact on 4D Seismic Interpretation 

      Holt, Rune Martin; Bauer, Andreas; Bakk, Audun (Journal article; Peer reviewed, 2018)
      Overburden stresses and pore pressure are altered by depletion or inflation of a subsurface reservoir, leading to seismic travel time and reflectivity changes that may be interpreted as footprints of reservoir drainage or ...
    • Stress-dependent elastic properties of shales—laboratory experiments at seismic and ultrasonic frequencies 

      Szewczyk, Dawid; Bauer, Andreas; Holt, Rune Martin (Journal article; Peer reviewed, 2018)
      Knowledge about the stress sensitivity of elastic properties and velocities of shales is important for the interpretation of seismic time-lapse data taken as part of reservoir and caprock surveillance of both unconventional ...
    • The impact of saturation on seismic dispersion in shales — Laboratory measurements 

      Szewczyk, Dawid; Holt, Rune Martin; Bauer, Andreas (Journal article; Peer reviewed, 2018)
      Previous studies found a significant increase of acoustic velocities between seismic and ultrasonic frequencies (seismic dispersion) for shales, which would have to be taken into account when comparing seismic or sonic ...
    • Theoretical study of Osmotic and Swelling Pressures with Experimental Investigation of Threshold Capillary Pressure in Shales 

      Arain, Aftab Hussain (Master thesis, 2015)
      Shales are considered to be the most problematic and challenging formation encounter during drilling. The major problems encountered during shale drilling are related to wellbore instability. The unfavorable interaction ...
    • 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 ...
    • Thermally Induced Compaction of Shales 

      Bauer, Andreas; Holt, Rune Martin; Stenebråten, Jørn; Sønstebø, Eyvind Frode; Marøen, Leni Larsen (Chapter, 2014)
      Thermally-induced, non-reversible compaction with volumetric strains of up to more than 1% has been observed in laboratory compaction tests with core plugs of several different shales. While thermallyinduced compaction is ...
    • Velocity dispersion in rocks: A laboratory technique for direct measurement of P-wave modulus at seismic frequencies 

      Lozovyi, Serhii; Bauer, Andreas (Peer reviewed; Journal article, 2019)
      Fluid saturated rocks exhibit a dependence of acoustic velocities on frequency, which is called velocity dispersion. For some rocks, e.g. shales, velocity dispersion is rather strong and have to be taken into ...
    • Wellbore Stability and the Thermal Effects Analysis for a North Sea Exploration Well 

      Prazeres, Inocencio (Master thesis, 2015)
      A good understanding the wellbore stability process is crucial for a safe and effective drilling of deep wells, wellbore instability is one of the key problems that engineers encounter during drilling. Wellbore instability ...