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Injection Scheme for Exact Wavefield Reconstruction and Applications to Imaging and Inversion
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 77th EAGE Conference and Exhibition 2015, Jun 2015, Volume 2015, p.1 - 5
Abstract
Seismic imaging and inversion of complex geologies is driving the development of high precision wavefield modeling tools. Most of the attention in the literature relating to accurate wavefield representation is focused on propagation and relatively little on the source implementation. Source representations are needed in imaging and inversion algorithms for both forward propagating physical source wavefields and back-propagating data. This is especially true for multi-component receivers at or near interfaces in the propagation model.
In this paper we describe a method to handle recorded seismograms with an injection scheme in time domain extrapolators that is an analytic exact solution of the wave equation. This method not only facilitates inversion studies for a refined characterization of subsurface targets, but also enables localized reproduction of wavefields in spatially confined sections of the subsurface model. The solution is derived for the general elastic wave equation and for specific applications in acoustic media.