Paper Summary
In this paper, the authors propose an elastic dynamic matching FWI (EDMFWI) as an extension of the acoustic algorithm. With the successful applications to variety of datasets, it demonstrates the significance to improve P-wave imaging in different scenarios: in a shallow ocean bottom cable (OBC) acquisition in North Sea, EDMFWI successfully inverts the velocity for a target reservoir with a known class 2p amplitude variation with offset response; its application to a sparse OBN data in deep water Gulf of Mexico produces a velocity model with better focused salt boundary and reduced salt halo resulting improved image underneath; the final example is from a DAS-VSP survey also in deep water, Gulf of Mexico, where elastic FWI takes advantage of the contribution from mode converted wave at salt interfaces benefiting considerably subsalt images.