Leveraging Angle Gathers for Refining Subsurface Models in Multi-Parameter FWI

We discuss the use of angle gathers in updating subsurface models within multi-parameter Full Waveform Inversion (FWI). The framework utilizes binned image gathers for modeling full pre stack data during simultaneous inversion of velocity and angle-dependent reflectivity. Tested on field data, the method demonstrated significant improvements in imaging, producing an accurate high-resolution subsurface model. Angle gathers are instrumental in both refining the velocity model and enabling analysis of amplitude variation with angle.