The fully automated ROCLAB system performs at in-situ temperatures, pore and bulk volume compressibility measurements of rock specimens under either hydrostatic stress, triaxial stress or uniaxial strain control. The apparatus consists of a controlled temperature pressure vessel which accommodates various loading platens with different diameters and three servo-controlled syringe pumps to respectively control the pore, radial and axial pressures. A diametral extensometer is utilized for radial strain measurement during compressibility tests while radial deformations are obtained with three LVDT sensors. An in-vessel strain-gaged load cell provides a direct reading of the axial force applied to the specimen.
Specifications
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Standard
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ISRM recommendations
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Maximum pore pressure
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100 MPa
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Maximum axial pressure
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100 MPa
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Maximum confining pressure
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100 MPa
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Temperature
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Ambient to 150°C (300 F)
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Specimen diameter
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1 inch, 30 mm and 1.5 inches
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Specimen length
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up to 4 inches
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Wetted parts
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Stainless steel or Hastelloy
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Power supply
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110-220 VAC, 50/60 Hz
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Air requirement
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100 psi
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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
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