True-amplitude migration through regularized extended linearized waveform inversion

The ability to create subsurface images whose amplitudes are proportional the elastic wavefield variations recorded within seismic data as a function of reflection angle is fundamental for performing accurate amplitude-variation-with-offset (AVO) analysis and inversion. A process that generates such commonly referred true-amplitude migration. We have determined how extended subsurface-offset image space able preserve behavior primary reflections when these events acoustically migrated with reverse time migration approach performed in least-squares fashion. Using single-interface model, we determine angle-domain amplitude from an extended-offset closely follow theoretical Zoeppritz response even at critical angle. Furthermore, develop subsalt synthetic test which 1C ocean-bottom-node (OBN) used regularized linearized waveform inversion procedure. In this test, highlight acoustic extended-angle domain correct reflected three sand lenses. Our method allows elastic-wave parameter reservoir characterization oil gas exploration production. its performance on OBN field set Gulf Mexico AVO potential gas-bearing prospect correctly retrieved.