Induced stresses due to fluid extraction from axisymmetric reservoirs
Pure and Applied Geophysics PAGEOPH
By: P. Segall
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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 of Geertsma (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. ?? 1992 Birkha??user Verlag.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Induced stresses due to fluid extraction from axisymmetric reservoirs |
| Series title | Pure and Applied Geophysics PAGEOPH |
| DOI | 10.1007/BF00879950 |
| Volume | 139 |
| Issue | 3-4 |
| Year Published | 1992 |
| Language | English |
| Publisher location | Birkha??user-Verlag |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Pure and Applied Geophysics PAGEOPH |
| First page | 535 |
| Last page | 560 |
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