Capabilities

  • Confining pressure up to 150 MPa
  • Pore pressure up to 128 MPa
  • Temperature up to 150 oC
  • Axial load up to 500 kN
  • Measurement of axial and radial internal, local deformations
  • Measurement of axial and radial ultrasonic P-and S-wave velocities and electrical resistivities
  • Saturation with oil, brine, water, gas, CO2 (incl. supercritical)
  • Realistic stress paths through variation of axial- and radial -stress, pore pressure and temperature, i.e. isotropic/anisotropic/uniaxial strain (K0) consolidation, undrained/drained shearing (CIU, CID)

Applications

  • Strength and deformation; tensile- and shear strength, friction angle, cohesion, failure criteria, compressibility, modulus, Poisson’s ratio
  • Permeability; steady state flow
  • Thermal testing; Coefficient of thermal expansion, thermal effects
  • HPHT testing; Biot’s effective stress coefficient, grain stiffness, depletion testing from high pore pressure
  • Rock physics; stress dependent relationships and correlations between geophysical and geomechanical parameters
Triaxial testing

Figure 1: NGI's triaxial cells for high stress testing (left) and HPHT setup (right)