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