Patent ID: 9442209
Filing Date: 2016-09-13
CPC Classification: G01V

Claim Text:
1. A method to determine structural information about a subterranean formation to be carried out by a computer system that includes one or more processors and one or more data-storage devices, the method comprising: computing vertical velocity wavefields associated with marine seismic receivers based on reflectivity of a time-varying, rough free surface profile above the marine seismic receivers and for frequencies below a threshold frequency using pressure wavefields measured at the receivers; computing receiver deghosted wavefields based on the measured pressure wavefields, vertical velocity wavefields measured at the receivers above the threshold frequency, and the computed vertical velocity wavefields; and generating an image of the subterranean formation using at least in part the receiver deghosted wavefields, the image revealing structural information about the subterranean formation.