Method for quantification of the level of weather and sea noise during marine seismic surveys
AssigneeGeco A.S.
InventorMorten Svendsen
Life of this patent
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Abstract
A method of quantifying the level of weather and sea noise during marine seismic surveys which often negatively effect the acquired data produced thereby, by recording this noise along the seismic line prior to the shot registration and possibly also during a break in the shot registration and/or after the conclusion of the shot registration, and obtaining a picture of these noise conditions which correspond to those which are found in the stacked records of common reflection points for improving the signal/noise ratio in the stacked CMP data.
Claims20
A method for determining the quantity of the level of weather and sea noise in marine seismic surveys utilizing a seismic energy source for producing seismic signals directed toward the area being surveyed and reflected from said area, and at least one seismic streamer cable having detectors in spaced relationship along the seismic streamer cable for detecting the reflected signals to produce shot recordings for said seismic signals comprising:
- obtaining at least one noise record along a seismic line of at least some of the channels in the seismic streamer at least one given point in time before an actual shot recording;
- stacking individual traces forming part of the noise record;
- and
- determining the number of traces used in the stack by the number of folds in the gather of each common reflection point to provide the quantity of the level of weather and sea noise.
Dependencies are inferred from the claim text.