Patent ID: 9176249
Filing Date: 2015-11-03
Classification: G01V

Abstract:
1. A method for separating primaries from ghosts of seismic data related to a subsurface of a body of water, the method comprising: receiving seismic data recorded by seismic receivers, wherein the seismic data is recorded in a time-space domain and the seismic receivers are located in the body of water; deriving a model domain describing the seismic data, the model domain being determined based on a function of a first operator representative of receiver ghost energy and a second operator representative of primary energy, wherein the first operator introduces sea-surface ghost energy by multiplying the first operator with a reflection coefficient at the sea-surface, and, in addition, the first and second operators reverse transform the model domain to obtain a representation of the seismic data, and the model domain is a domain other than the time-space domain; using the derived model domain to separate primary from ghost energy by applying a third operator to the derived model domain; and generating a final image of the subsurface based on the separated primary or ghost energy.