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Keywords: borehole pressure
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Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0881
... horizontal stress Sh (parallel to the maximum horizontal stress S The cracks close with venting and reopen with repressurization. In the conven- tional theory, the borehole pressure required to re- open the crack, the reopening pressure P , is given by P, = 3s, - S" - Pp (1) where Pp is the pore pressure...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-1161
... Wellbore Design displacement borehole pressure wellbore integrity axial stress criteria reservoir geomechanics strength criterion MPa principal stress shale reduction failure criterion plane strain condition Reservoir Characterization Upstream Oil & Gas pore pressure...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1279
... changes during pressurization in two perpendicular directions. During borehole pressurization under anisotropic far-field stresses diametral increase at right angles to the future hydrofrac helped isolate two critical pressures, one at which fracture initiated (well before breakdown) and one at which...

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