FULL WAVEFORM INVERSION METHOD FOR SEISMIC DATA PROCESSING USING PRESERVED AMPLITUDE REVERSE TIME MIGRATION

摘要

A preserved-amplitude RTM-based FWI method is used to obtain an image of an explored subsurface formation (400). Model data corresponding to detected data is generated using a velocity model of the formation (420). Residuals representing differences between the modeled data and the detected data are back-propagated (430) to then update the velocity model a local optimization based on a deconvolution formula employing a backward propagating wavefield and a forward propagating wavefield (440). Geophysical features of the formation are imaged based on the updated velocity model (450).