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|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|
|Editor:||John Wiley and Sons|
|Appears in Collections:||FEC - Artigos e Outros Documentos|
IMECC - Artigos e Outros Documentos
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