Multicomponent elastic reflection full waveform inversion

Kris Innanen

ABSTRACT

Full waveform inversion applied to reflection mode, multicomponent land data is considered, in the context of the iterated recovery of a range of parameters, ranging from standard elastic λ, μ and ρ, through to petrophysically relevant parameters such as the fluid term f of Russell and Gray. Much of the effort lies in constructing a flexible framework for elastic multicomponent sensitivities, which we address with a two-stage integration by parts regimen. Matrix forms for a multicomponent objective function and three term gradient and nine term Hessian are then determined, and the reductions necessary to invert PP, PS, SP, and SS modes independently or jointly are formed.

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