Publications

Every reflection wavelet recorded by a marine streamer is accompanied by a ghost reflection from the sea surface. If both the seismic pressure wavefield and the vertical component of the particle velocity can be acquired using co-located pressure and velocity sensors, it is then possible to combine these datasets to produce a seismic image with the receiver ghost removed. A new dual-sensor streamer has been developed to record both of these desired seismic wavefields and enable extraction of the up-going and down-going pressure and velocity wavefields. The up-going pressure wavefield represents the de-ghosted pressure result. The new dual-sensor streamer architecture uses densely sampled co-located pressure and velocity sensors housed in a low-noise ruggedized solid streamer to deliver de-ghosted data in one pass, using one streamer depth. Deep streamer towing facilitated by the dual-sensor technology increases the operational weather window (and therefore improves operational efficiency), reduces noise, and increases signal penetration. The de-ghosted seismic data exhibit a greater frequency bandwidth and a greater signal-to-noise ratio than can be obtained using conventional streamers. The new dual-sensor streamer technology enhances resolution, and through new opportunities for advanced multiple removal, seismic inversion and data interpretation, will contribute to improved imaging of the subsurface.