Patent ID: 7068568
Filing Date: 2006-06-27
Classification: G01V

Abstract:
1. A method of de-ghosting seismic data, the method comprising the steps of: a) obtaining seismic data using a seismic source and a seismic receiver disposed within a fluid medium; b) determining a derivative with respect to time of the fluid pressure at a point in the vicinity of a selected one of the seismic source and the receiver; c) determining a derivative with respect to a first direction of the fluid pressure at a point in the vicinity of the selected one of the seismic source and receiver; d) determining a derivative with respect to a second direction of the fluid pressure at a point in the vicinity of the selected one of the seismic source and receiver from the results of steps (b) and (c); and e) processing the seismic data using the derivative with respect to a second direction of the fluid pressure, thereby to reduce the effects in the processed seismic data of seismic energy reflected and/or scattered at the sea surface.