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TECHNICAL PAPERS

Time-Dependent Failure Analysis of Inclined Boreholes in Fluid-Saturated Formations

[+] Author and Article Information
L. Cui

Rock Mechanics Institute, The University of Oklahoma, Norman, OK 73019

Y. Abousleiman

School of Engineering and Architecture, Lebanese American University, Byblos, Lebanon

A. H-D. Cheng

Department of Civil and Environmental Engineering, The University of Delaware, Newark, DE 19716

J.-C. Roegiers

Rocks Mechanics Institute, The University of Oklahoma, Norman, OK 73019

J. Energy Resour. Technol 121(1), 31-39 (Mar 01, 1999) (9 pages) doi:10.1115/1.2795057 History: Received August 15, 1997; Revised December 07, 1998; Online November 06, 2007

Abstract

This paper presents time-dependent poroelastic failure analyses of boreholes drilled in directions inclined to the far-field stress principal axes in fluid-saturated isotropic porous formations. The work is based on a recently derived analytical solution. The analyses include collapse as well as fracturing failures. The time-dependent failures in relation to borehole inclination, azimuth, and mud pressure are presented. The critical roles of poroelastic constants in borehole stability are also demonstrated.

Copyright © 1999 by The American Society of Mechanical Engineers
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