Wellbore Stability Analysis In Porous Carbonate
Rocks Using Cap Models
Author(s)
L.C. Coelho, A.C. Soares, N.F.F. Ebecken, J.L.D. Alves
& L. Landau
Abstract
It is well established that hydrocarbon wellbores fail under tension mode or shear
compressive mode. Although there are sophisticated constitutive models that
may represent the behavior of the rock, the lack of data available lead to the use
of simple models such as elastic models with a failure criteria, and the Drucker-
Prager or Mohr-Coulomb elastic-plastic models with associated or nonassociated
flow rules. Recently, many studies have been published on the
behavior of porous rocks. Mechanisms of pure compression failure (no shear)
have been described. Cap plasticity models may represent the material pure
compression failure. An experimental program and numerical simulations on
porous carbonate rock from Campos Basin, offshore Brazil, carried out
in
Keywords
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