Dithered Slip Sweep Vibroseis Acquisition System and Technique
AssigneeWesternGeco L.L.C.
InventorsClaudio Bagaini, Ian Moore
Life of this patent
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Abstract
A technique includes generating vibroseis sweeps for a vibroseis survey to produce seismic data acquired in response to seismic signals produced by the sweeps. The generation of the vibroseis sweeps including temporally arranging the sweeps into time-overlapping groups. The technique includes regulating a timing of the groups relative to each other based on a slip time. The technique also includes regulating a timing of the sweeps of each group such that consecutive sweep firings of each group are spaced apart by a time substantially less than the slip time.
Claims16
A method comprising:
- generating vibroseis sweeps for a vibroseis survey to produce seismic data acquired in response to seismic signals produced by the sweeps, the generating including temporally arranging the sweeps into time-overlapping groups;
- regulating a timing of the groups relative to each other based on a slip time;
- and
- regulating a timing of the sweeps of each group such that consecutive sweep firings of each group are spaced apart by a time substantially less than the slip time.
A system comprising:
- actuators to generate vibroseis sweeps for a vibroseis survey to produce seismic data acquired in response to seismic signals produced by the sweeps, the sweeps being arranged in time-overlapping groups;
- and
- a control subsystem to:
- regulate a timing of the groups relative to each other based on a slip time;
- and
- regulate a timing of the sweeps of each group such that consecutive sweep firings of each group are spaced apart by a time substantially less than the slip time.
A system comprising:
- an interface to receive seismic data acquired in response to vibroseis sweeps temporally arranged in time-overlapping groups;
- and
- a processor to:
- process the seismic data based on a slip time separation technique to separate the data into first datasets that are each associated with a different group;
- and
- process the first datasets based on a source dithering separation technique to separate each first dataset into second datasets that are each associated with a different one of the sweeps.
Dependencies are inferred from the claim text.