Redatuming and Deghosting of Variable-Depth Streamer Data

The frequency of ghost notch is naturally diversified by random variations at the sea surface. Further diversity may be achieved by towing a variable depth streamer. Regardless of the streamer shape however, the recorded seismic data needs redatuming and deghosting with respect to both ray parameter and individual source and receiver depths. We present a slowness-variant redatuming and deghosting method, capable of handling variable depths and irregular offsets. We utilize fine-tuned depths for deghosting and estimated elevations for redatuming. The effectiveness of the presented method has been validated by application to field data acquired by various configurations including flat, slant and curved streamers.