WIT Press


Application Of Complex Variables Boundary Element Method To Modeling Borehole Stresses In Anisotropic Stress Field In Non-linear Rocks

Price

Free (open access)

Paper DOI

10.2495/BT990141

Volume

23

Pages

11

Published

1999

Size

902 kb

Author(s)

S.G. Mogilevskaya, P.A. Nawrocki and M.B. Dusseault

Abstract

Application of complex variables boundary element method to modeling borehole stresses in anisotropic stress field in non-linear rocks S. G. Mogilevskaya, P. A. Nawrocki and M. B. Dusseault Department of Earth Sciences, University of Waterloo, Waterloo, Ontario Email: sofia@panda.uwaterloo.ca Abstract A new approach is presented to model borehole stresses in anisotropic stress fields in non-linear rocks. The numerical approach combines a rapid al- gorithm based on the new complex hypersingular equation for piece-wise homogeneous media with a circular opening. Also, a special technique of obtaining input data from a series of triaxial compression tests is introduced. 1 Introduction Modelling borehole stresses is important for the petroleum industry because of practical problems such as borehole instability assessment, mud weight choice, casing design, and sand production prediction. There is now general agreement that linear elasticity analyses invariably underpredict openin

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