ABSTRACT

ABSTRACT: Based on our experimental observations, we developed a numerical model of borehole breakout growth in Alabama limestone. For given states of far-field stress breakout shape and dimensions were obtained by simulating the episodic nature of the spalling process and utilizing a rock strength-size effect determined for boreholes of differing radii. These geometric characteristics of the simulated breakouts correctly matched our experimentally produced ones. The results suggest a means to estimate one of the principal in situ horizontal stresses when the other principal stress is known and breakout dimensions are logged.

Keywords:
Reservoir Characterization, Herrick, Zoback, borehole breakout, breakout dimension, borehole wall, reservoir geomechanics, Alabama limestone, horizontal stress, episodic failure
Subjects:
Reservoir Characterization, Reservoir geomechanics
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1994. A.A. Balkema - Permission to Distribute - American Rock Mechanics Association
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