Positioning system for repeat marine seismic surveying of a previously surveyed area

摘要

In order to improve the repeatability of marine seismic surveys carried out over the same subsurface area using a towed seismic source and a towed array of seismic streamers 66, the source and streamer array used to perform surveys after the first are depth-controlled and steered laterally 38 so that the source and at least some of the sensors in the streamers occupy at least some of the same positions as the source and sensors of the first survey 72.