Interpolation and deghosting of seismic data acquired in the presence of a rough sea

A system to process seismic data acquired in a survey conducted in the presence of a rough sea, the system comprising:

• an interface to:
• receive a first dataset derived from data acquired by seismic sensors of a first set of least one streamer generally towed at a first depth in the seismic survey, the first dataset representing at least pressure measurements;
• and
• receive a second dataset derived from data acquired by seismic sensors of a second set of at least one streamer generally towed at a second depth different than the first depth in the seismic survey, the second dataset representing at least crossline particle motion measurements containing a rough sea perturbation component;
• and
• a processor to:
• process the first and second datasets to apply a one way propagator to the pressure measurements represented by the first dataset to derive crossline particle motion measurements at the second depth substantially containing the rough sea perturbation component;
• and
• combine the derived crossline particle motion measurements at the second depth with crossline measurements indicated by the first dataset to determine crossline particle motion measurements in the presence of a relatively flat sea surface.

An article comprising a non-transitory computer readable storage medium to store instructions that when executed by a computer cause the computer to:

• receive a first dataset derived from data acquired by seismic sensors of a first set of least one streamer generally towed at a first depth in a seismic survey conducted in the presence of a rough sea, the first dataset representing at least pressure measurements;
• receive a second dataset derived from data acquired by seismic sensors of a second set of at least one streamer generally towed at a second depth different than the first depth in the seismic survey, the second dataset representing at least crossline particle motion measurements containing a rough sea perturbation component;
• apply a one way propagator to the pressure measurements represented by the first dataset to derive crossline particle motion measurements at the second depth substantially containing the rough sea perturbation component;
• and
• combine the derived crossline particle motion measurements at the second depth with crossline measurements indicated by the first dataset to determine the crossline particle motion measurements in the presence of a relatively flat sea surface.

A method comprising:

• receiving data received from seismic sensors of a spread of seismic streamers towed in a survey conducted in the presence of a rough sea, the data representing a plurality of pressure measurements and a plurality of particle motion measurements and at least two of the streamers being towed in the survey at different depths;
• processing the data to generate a dataset indicative of pressure and vertical particle motion measurements conducted in the presence of a relatively flat sea surface, the processing comprising:
• applying a one way propagator to the pressure measurements of the plurality of pressure measurements acquired by sensors of one of the streamers towed at a first depth to derive crossline particle motion measurements corresponding to a depth other than the first depth at which another one of the streamers was towed;
• and
• determining crossline particle motion measurements in the presence of a relatively flat sea based at least in art on the plurality of crossline particle motion measurements and the derived crossline article motion measurements;
• and
• based on the dataset, performing interpolation and deghosting.