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Analysis of borehole failure modes and pore pressure effects

Sammendrag

The theoretical background and finite element simulations of Red Wildmoor sandstone hollow-cylinder experiments performed under various axial and radial loading conditions are presented together with borehole failure predictions. A non-linear, stress dependent elastic, Mohr-Coulomb elastoplastic constitutive model generalized for three-dimensional Cosserat continua is employed. The failure predictions are based on the bifurcation theory and incorporate the effect of microstructure. Two bifurcation instability criteria are formulated, one for lateral and one for axial failure modes. The effect of fluid flow on borehole failure is investigated with reservoir depletion and drawdown simulations and the results are corroborated through experimental data.

Kategori

Vitenskapelig artikkel

Språk

Engelsk

Forfatter(e)

Institusjon(er)

  • SINTEF Industri / Petroleum
  • Aristotle University of Thessaloniki

År

2010

Publisert i

Computers and geotechnics

ISSN

0266-352X

Årgang

37

Side(r)

141 - 152

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