Learnings from an FWI imaging study using 3D and 4D data over a postsalt field in Campos Basin

Seismic images obtained through conventional migration methods have limitations as amplitude distortions and migration artifacts. To mitigate these limitations, we can generate FWI Images by computing the reflector-normal derivatives of the high-frequency FWI velocities. Given the resolution, accuracy, and geological consistency of the velocities obtained from TLFWI, FWI Images can be compared with traditional migration images. Thus, we present the advantages of 3D FWI Images over conventional RTM images when dealing with geological obstructions. By computing FWI Images from the individual FWI velocities of baseline and monitor, we can also illustrate the benefits of FWI Imaging for 4D by retrieving more continuous amplitudes at the reservoir level and analyze the effects of using respective baseline and monitor velocities in 4D images.