Interpretation Driven Salt Halo Calibration for AFWI Model and Its Impact on Imaging: a Case History

Acoustic FWI (AFWI) remains a widely employed method for updating the overall velocity model. However, one drawback associated with AFWI is the elastic effect stemming from significant impedance contrasts (Liu, et al., 2024). This elastic effect manifests as a smoothing effect around the salt, commonly referred to as "salt halo imprint". To address this issue, the authors propose a calibration approach driven by interpretation around the salt geobodies. This aims to minimize the salt halo imprint in the AFWI model, thereby enhancing both the AFWI velocity model and the imaging quality around complex salt overhangs