The fully automated ROCLAB system performs pore and bulk volume compressibility measurements of rock specimens at in-situ temperatures under hydrostatic stress, triaxial stress, or uniaxial strain control. The apparatus includes an axial-piston triaxial cell engineered to provide the deviatoric stress required to replicate downhole conditions well before actual rock failure occurs, along with three servo-controlled syringe pumps that independently regulate pore, radial, and axial pressures. A diametral extensometer is used to measure radial strain during compressibility tests, while three LVDT sensors capture radial deformations. An in-vessel strain-gaged load cell provides a direct measurement of the axial force applied to the specimen.
Specifications
|
Standard
|
ISRM recommendations
|
|---|
|
Maximum pore pressure
|
100 MPa
|
|
Maximum axial pressure
|
100 MPa
|
|
Maximum confining pressure
|
100 MPa
|
|
Maximum deviatoric stress
|
100 MPa
|
|
Temperature
|
Ambient to 150°C (300 F)
|
|
Specimen diameter
|
1 inch, 30 mm and 1.5 inches
|
|
Specimen length
|
up to 4 inches
|
|
Wetted parts
|
Stainless steel or Hastelloy
|
|
Power supply
|
110-220 VAC, 50/60 Hz
|
|
Air requirement
|
100 psi
|
Benefits
Include in-vessel strain sensors for uniaxial-strain compressibility tests
Simulates actual reservoir production stress path
Accounts for inelastic behavior of reservoir rock
Measures compaction directly from axial strain
Multifunctional system
Video presentation: