Alteration of regional stress by reservoirs and other in homogeneities: Stabilizing or destabilizing?

J. W. Rudnicki*

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

68 Scopus citations

Abstract

The solution of Eshelby (1957) is used to calculate the alteration of regional stress by a reservoir or other region with elastic constants, pore pressure, or temperature different than the surrounding material. As the aspect ratio of the inhomogeneity, the ratio of thickness to lateral extent, approaches zero, the local strain change approaches uniaxial plus the imposed far field (regional) strain. The approach to uniaxial strain with decreasing aspect ratio is slower if the shear modulus of the inhomogeneity exceeds that of the surrounding material. Depletion or withdrawal stress paths in a space of shear stress vs. Effective mean stress are steeper for flatter reservoirs, smaller reservoir Poisson's ratios, smaller ratios of reservoir shear modulus to matrix shear modulus and bigger ç, Biofs porous media constant. Generally, steeper stress paths cause the reservoir stress state to move toward failure for injection and away from failure for withdrawal.

Original languageEnglish (US)
Pages1629-1637
Number of pages9
StatePublished - Jan 1 1999
Event9th International Society for Rock Mechanics Congress, ISRM 1999 - Paris, France
Duration: Aug 25 1999Aug 28 1999

Conference

Conference9th International Society for Rock Mechanics Congress, ISRM 1999
Country/TerritoryFrance
CityParis
Period8/25/998/28/99

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology

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