INDUCED STRESSES DUE TO FLUID EXTRACTION FROM AXISYMMETRICAL RESERVOIRS

被引：131

作者：

SEGALL, P

机构：

[1] Department of Geophysics, Stanford University and U.S. Geological Survey, Menlo Park, California

来源：

PURE AND APPLIED GEOPHYSICS | 1992年 / 139卷 / 3-4期

关键词：

INDUCED SEISMICITY; POROELASTICITY; FLUID EXTRACTION;

D O I：

10.1007/BF00879950

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页码：535 / 560

页数：26

共 25 条

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