Starting of with the additional information we can extract from deep water OBN data, the challenges and possibilities in processing OBN data are explored. In deep water OBN data the tail of the source signature and Vz noise often mask the signal in a time window which otherwise only contains upgoing data. Proper handling of the shot-to-shot variation, designature and the Vz-noise is the key to fully utilize this window of upgoing data only and a good up/down separation. For the source signature we show that it can be extracted from the data itself on a shot-by-shot basis and used for designature.

The datum difference between source and receiver in deep water OBN means that the reflection point even for P-waves is not at the midpoint. We present a method for correctly binning the data without migration which can be used for brute stacks in parameter and workflow testing


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