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Type: Artigo
Title: An adaptive finite element model for wellbore breakout simulation
Author: Cecilio, Diogo L.
Devloo, Philippe R. B.
Gomes, Sonia M.
Santos, Erick S. R.
Abstract: A finite element formulation is proposed and implemented for analysing the stability of excavated wells using the DiMaggio-Sandler constitutive elastoplastic model with a typical carbonate reservoir configuration. The quality of the finite element approximation is ensured by applying smooth curved elements adapted to the wellbore geometry, and h - p adaptive finite element meshes in the plastic zone. General purpose procedures are defined to transfer the elastoplastic deformation history to newly created integration points. A breakout damage criterion is proposed based on the second invariant of the deviatoric plastic deformation tensor. This damage criterion is used to apply a mesh movement algorithm to represent material collapse. The automatic successive application of the breakout damage criterion results in elliptical realistically looking geometries obtained in experiments reported in the literature
Subject: Mecânica de rochas
Country: Reino Unido
Editor: John Wiley and Sons
Rights: Fechado
Identifier DOI: 10.1002/nag.2895
Date Issue: 2019
Appears in Collections:FEC - Artigos e Outros Documentos
IMECC - Artigos e Outros Documentos

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