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pure and applied geophysics

, Volume 139, Issue 3–4, pp 535–560 | Cite as

Induced stresses due to fluid extraction from axisymmetric reservoirs

  • Paul Segall
Article

Abstract

Earthquakes can be induced by fluid extraction, as well as by fluid injection.Segall (1989) proposed that poroelastic stresses are responsible for inducing earthquakes associated with fluid extraction. Here, I present methods for computing poroelastic stress changes due to fluid extraction for general axisymmetric reservoir geometries. The results ofGeertsma (1973) for a thin disk reservoir with uniform pressure drop are recovered as a special case. Predicted surface subsidence agrees very well with measured leveling changes over the deep Lacq gas field in southwestern France. The induced stresses are finite if the reservoir pressure changes are continuous. Computed stress changes are on the order of several bars, suggesting that the preexisting stress states in regions of extraction induced seismicity are very close to frictional instability prior to production.

Key words

Induced seismicity poroelasticity fluid extraction 

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Copyright information

© Birkhäuser Verlag 1992

Authors and Affiliations

  • Paul Segall
    • 1
  1. 1.Department of GeophysicsStanford University and U.S. Geological SurveyMenlo ParkUSA

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