Full-elastic AVA extraction using acoustic FWI
Michael R. Warner, John Armitage, Adrian P. Umpleby, Nikhil Shah, Henry A. Debens, Fabio Mancini · 2022
We demonstrate that accurate amplitude-vs-angle param-eters can be extracted from raw unprocessed seismic data using purely acoustic full-waveform inversion. The result-ant parameters incorporate the full elastic response of the observed data, and it is not necessary to use elastic FWI in order to determine AVA. This approach naturally corrects for a multitude of other amplitude effects including reflector geometry and transmission losses, and it deals correctly with near-critical and post-critical reflections. FWI-based work-flows are consequently simpler than conventional work-flows, and AVA parameters can normally be generated by FWI within days of raw field data first becoming available.