Determining sea surface elevation to reduce effect of sea surface ghost reflections

摘要

The invention concerns a method for reducing the effect of a rough sea ghost reflection in marine seismic data. According to the invention, the method comprises the steps of: providing one or a plurality of pressure sensors sensitive to frequencies below about 1 Hz;-using said sensor(s) to receive and acquire pressure data in a frequency band comprised between about 0.03 and about 1 Hz;-recording said data; and-processing said data to provide information about the sea-height above the or each sensor. The or each sensor may be a seismic sensor that can acquire seismic data substantially simultaneously with the acquisition of the pressure data in a frequency band between about 0.03 and about 1 Hz.