Cggveritas Services S.a.

Cgg Services Sa

Cgg Services Sas

Sercel Inc.

Jean-Pierre Degez

Fabrice Mandroux

Raphaël Macquin

Thomas Mensch

Thomas Elboth

Christophe Guevel

Pierre Le Roux

Thierry Favier

System and method for shooting plural seismic sources Si in a marine acquisition system with a deblending-designed dithering sequence DS. The method includes generating the deblending-designed dithering sequence DSto include random dithering times D, a range of the dithering times Dbeing larger than a preset, non-zero, minimum value pmv; selecting a shooting sequence SS for the plural seismic sources Si; and shooting the plural seismic sources Si with the deblending-designed dithering sequence DS, based on the shooting sequence SS. All odd or all even members of the shooting sequence SS are shot with zero dithering times.

System and method for generating dithering sequences with minimum value for seismic exploration

Method and system for improving azimuth distribution. The system includes plural streamers towed by a streamer vessel; a central source towed by the streamer vessel; first and second front sources located in front of the plural streamers along a traveling direction of the streamer vessel; and first and second large offset front sources located in front of the first and second front sources along the traveling direction. The offset distance between the first and second large offset front sources, along a cross-line direction, is larger than an offset distance between the first and second front sources.

Method and device for marine seismic acquisition

Method and system for improving offset/azimuth distribution. The system includes plural streamers towed by a streamer vessel; a central source towed by the streamer vessel; first and second front sources located in front of the plural streamers along a traveling direction of the streamer vessel; and first and second large offset front sources located in front of the first and second front sources along the traveling direction. The offset distance between the first and second large offset front sources, along a cross-line direction, is larger than an offset distance between the first and second front sources.

A method and a marine front-end gear for connecting a set of streamers to a towing vessel. The front-end gear includes ropes for connecting a first sub-set of streamers to the vessel; lead-ins for connecting a second sub-set of streamers to the vessel; and a back loop cable electrically connected between tails of first and second adjacent streamers. The first streamer belongs to the first sub-set of streamers and the second streamer belongs to the second sub-set of streamers, and streamers of the first sub-set are interspersed with streamers of the second sub-set.

Growing community of inventors

Massy, France

Jean-Pierre Degez