Full wavefield least-squares reverse time migration

Waveform inversion based on least-squares reverse time migration (LSRTM) usually involves Born modeling, which models the primary-only data. As a result, process handles only primaries and corresponding multiple elimination preprocessing of input data is required prior to imaging inversion. Otherwise, multiples left in are mapped as false reflectors, also known crosstalk, final image. At same time, developed full-wavefield (FWM) methodology can handle internal an inversion-based process. However, because it framework one-way wave equation, cannot image dips close beyond 90°. Therefore, we have aimed at upgrading LSRTM by bringing functionality FWM multiples. We inject secondary source term, used original formulation FWM, define wavefield relationship that allows modeling scattering via reflectivity. The term estimated reflectivity be injected into pressure component when simulating two-way equation using finite-difference modeling. use this modified forward model for estimating FWM-type manner validate method synthetic field containing visible