Digital signalbehandling og bildeanalyse, UiO and PGS
The effects of moving rough sea surfaces on seismic data.
A major hindrance in fully understanding the data acquired in marine seismic exploration is the restricting assumption of flat and stationary sea surface used in modeling and processing tools. A vital first step for an accurate removal of ghost effects during data processing, is a thorough investigation of the ghost effects originating from a time-varying sea surface.
Here, we present a novel tool for modelling source and receiver ghosts in the presence of rough time-varying sea surfaces. Based on acoustic reciprocity, we derived an integral method to couple up-going subsurface reflection data with modelled time-varying sea surface reflectivity. First modeling results show the major difference on seismic data between a time varying sea surface and a stationary one.