Capabilities

  • Microfocus CT scanner with rotating manipulator table to which core holders made of carbonfibre composite (X-ray transparent)
  • Two cells – one for isotropic and one for anisotropic stresses - optimized for rock physics and stress paths testing, respectively
  • Two phase fluid flow incl. CO2 (gas and liquid)
  • Time lapse 3D volume reconstruction, and processing algorithms for 3D flow and deformation quantification
  • Measurement of axial ultrasonic P & S-wave velocities and resistivities

Applications

  • Visualization of deformation processes during tests under realistic stress conditions (compaction, failure, shear localization)
  • Visualisation of flow processes in flow experiments (i.e. with estimation of saturation from CT scanning)
  • Rock physics vs. flow/saturation, combined velocity and resistivity during fluid flow measurements for rock physics relationships versus fluid saturation
CT scanner testing

Figure: NGI's isotropic cell inside CT scanner (left), visualization of CO2 flow and shear deformation (right)

NGI's CT- scanner is also used for general characterization of rock and fractures;   

  • 2D representation (axial and radial sections) and 3D volume representation of cores and plugs
  • Inspection of core quality or heterogeneities before testing
  • Aperture/roughness distribution
  • Evaluation of failure mechanisms after testing