This paper presents closed-form analytical solutions for the stress and deformation outside and inside a porous layer embedded within elastic strata of dissimilar mechanical properties and subjected to pore pressure disturbances due to fluid extraction or injection. Previous solutions for axisymmetric pore pressure reduction in a homogenous half-space (Geertsma, 1973a; Segall, 1992) are recovered as special cases of current study. In particular, practical implications of the proposed solution, such as surface deformation, reservoir compaction, and depletion/injection-induced stress redistribution are reevaluated under the relaxed assumptions made in this study. It is shown that obtained results can be generalized to the case of multilayered strata.
All Science Journal Classification (ASJC) codes
- Fuel Technology
- Geotechnical Engineering and Engineering Geology