Paper submitted to IMAGE 2026, by Hao Xing, Faqi Liu, Guanghui Huang, Richard Huang, Zhuoquan Yuan, Brahma Mekala, Aurora Roderiguez-Castelan, Khaled Abdelaziz, Mohammed Hegazy (TGS).
Abstract
The integration of sparse Ocean Bottom Node (OBN) acquisition with Elastic Full-Waveform Inversion (EFWI) has remarkably improved subsalt imaging in the Gulf of America. We present a case study of applying the Elastic Multi-Parameter Full Waveform Inversion (E-MPFWI) to a sparse OBN data in one of the Amendment surveys in Mississippi Canyon. Through proper kernel separation, EMPFWI jointly inverts a low frequency background velocity that accounts for the kinematic effect and a high-resolution reflectivity of the subsurface, which, even compared to the FWI derived reflectivity (FDR) in single parameter FWI, has improved SNR with better illumination, leading to sharper interfaces in the challenging subsalt area.
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