Linearized AVO and poroelasticity

Brian H. Russell, David Gray, Daniel P. Hampson, Laurence R. Lines

This study combines the technique of amplitude variations with offset, or AVO, analysis with the theory of poroelasticity to derive a linearized AVO approximation that provides the basis for the estimation of fluid, rigidity and density parameters from the weighted stacking of pre-stack seismic amplitudes. The method proposed is a generalization of the two AVO approximations introduced by Gray et al. (1999) using the formulation introduced by Russell et al. (2003). After a review of linearized AVO theory, we present the theory of our approach. We then apply our method to both model and real datasets.