Method for determination of local wave heights and acoustic sensor in marine seismic signals

摘要

A method of analysing seismic signals for use in connection with marine seismic data acquisition activities including the steps of: sensing a receiver ghost signal using a submerged acoustic sensor (18); and estimating the height of the water column above the acoustic sensor using said receiver ghost signal (30). The method may further include the steps of: identifying changes in arrival times from seismic signals received by a plurality of submerged acoustic sensors (18) located at different offsets from an acoustic source; determining time differences between the identified changes in arrival times and expected changes in arrival times associated with an assumed acoustic sensor depth profile; and converting the time differences into depth differences between the assumed acoustic sensor depth profile and the actual depth profile of said acoustic sensors. This method provides for improved determination of local wave heights and acoustic sensor elevations and allows 'noise' in seismic data associated with changes in local wave heights and seismic sensor elevations to be attenuated during subsequent data processing.