FRACLAB-Hydraulic Fracture test system


The FRACLAB Hydraulic Fracture Test System performs hydraulic fracture experiments with micro-seismic activity monitoring on rock specimens under triaxial stress states and elevated temperature. The device comprises a deviatoric triaxial cell equipped with an acoustic emission monitoring system. Four servo-controlled syringe pumps are utilized to control confining, axial, pore and fracturing fluid pressures. A lifting mechanism facilitates specimen setup. The apparatus determines specimen breakdown pressure at given confining and pore pressures, after which the tensile strength and frac-coefficient are computed. The acoustic emission (AE) monitoring system allows the growing hydraulic fracture to be characterized while applying test stresses and hydraulic fracturing pressures. Useful AE characteristic parameters, including hit counts, energy, amplitude, event duration and AE hypocenter localization are determined. Precise in-vessel deformation sensors measure diametral and axial strains during the test.

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Maximum confining pressure: 70 MPa  
Maximum axial force: 424 MPa
Maximum pore pressure: 70 MPa
Max. temperature: 150°C
Injection flow rate: 0.001 to 80 cc/min
Specimen diameter: 54.7 mm (other upon request)
Specimen length: twice the diameter
Connections: 1/8 inch
Sleeve material: Viton
Wetted part material: Stainless steel