Device and method for deghosting variable depth streamer data

摘要

Computing device, computer instructions and method for deghosting seismic data related to a subsurface of a body of water. The method may include receiving input seismic data recorded by seismic receivers that located at different depths (zr), generating migration data (du) and mirror migration data (dd) from the input seismic data, deriving a ghost free model (m) based on simultaneously using the migration data (du) and mirror migration data (dd), generating primary (p) and ghost (g) datasets based on the ghost free model (m), simultaneously adaptively subtracting the primary (p) and ghost (g) datasets from the migration data (du) to provide adapted primary (p′1 and p′2) and adapted residual (r′1 and r′2) datasets and generating a final image (f) of the subsurface based on the adapted primary (p′1 and p′2) and the adapted residual (r′1 and r′2) datasets.

主权项

1. A method for de-ghosting seismic data related to a subsurface of a body of water, the method comprising:
receiving input seismic data recorded by a plurality of seismic receivers, wherein the input seismic data is recorded in a time-space domain and the seismic receivers are located at different depths (zr) in the body of water; generating migration data (du) and mirror migration data (dd) from the seismic data; deriving a ghost free model (m) based on simultaneously using the migration data (du) and mirror migration data (dd); using the ghost free model to generate a deghosted dataset; and generating a final image (f) of the subsurface using the deghosted dataset.