Laboratory testing of granite blocks containing a circular borehole was carried out with uniaxial and biaxial loading conditions, and with borehole diameters ranging from 5 to 103 mm. Borehole breakouts were also investigated in situ using borehole diameters ranging from 75 to 3500 mm. Results show that the same strength-scaling law cannot be applied to both laboratory and in situ breakouts.

Keywords:
reservoir geomechanics, breakout, test tunnel, unconfined compressive strength, fracture, martin, situ, reservoir characterization, compressive strength, borehole diameter
Subjects:
Hydraulic Fracturing, Reservoir Characterization, Seismic processing and interpretation, Reservoir geomechanics
Copyright 1994, Society of Petroleum Engineers
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