First look at seismic data from a towed dual-sensor streamer

3D Seismic Survey Design, Second edition

“…A much nicer option is to use this technique in combination with over/under acquisition or, even better, with a dual-sensor streamer (Carlson et al, 2007b;Pharez et al, 2008). These techniques use much deeper streamers, so a depth can be chosen where the streamers are no longer affected by the turbulence caused by the source vessel.…”

“…As long as the first notch of the hydrophone data is well above 20 Hz (cable shallower than about 25 m), the velocity sensor can still be used to remove the first hydrophone notch from the recorded data (Cambois et al, 2009a). Processing results of data acquired with the dualsensor streamer can be found in Carlson et al (2007b) or in Pharez et al (2008). Figure 5.26 illustrates the power of combining the data acquired with the two types of sensor.…”

A Comparison of Strategies for Seismic Interferometry

“…Let's assume that the total field at every location can be decomposed in a downgoing field D and upgoing field U. For acoustic waves this decomposition can be carried out by combining pressure and particle velocity using dual sensor summation (Robinson 1999; Pharez et al 2008), or alternatively by towing streamers in marine seismology using the over-under configuration (Hill et al 2006;Moldoveanu et al 2007). For electromagnetic fields the up-down separation can be achieved by making suitable combinations of electric (Amundsen et al 2006).…”

Directional interpolation of multicomponent data

“…Therefore, most of the interpolation methods have been targeted at interpolating pressure measurements (Liu and Sacchi ; Abma and Kabir ; Trad ). However, new acquisition technologies that measure more than one wavefield component at the streamers are now available (Pharez, Hendrick and Tenghamn ; van Manen et al . ; Mellier et al .…”