MARINE SEISMIC EXPLORATION IN ICE-COATED OR HAVING OBSTACLES OF WATERS

摘要

1. Marine seismic survey installation for waters with obstacles, the installation comprising: at least one source towed from a vessel below the surface of the water and generating a seismic source signal; at least one towed streamer towed from a vessel below the surface of the water and detecting a seismic signal source; at least one controllable device located on at least one towed streamer, at least one controllable device has a vertical position, adjustable in water relative to the surface of the water, at least one controllable device has a receiver that receives global positioning system information being at least close to the surface of the water. 2. An offshore seismic installation for waters with obstacles, the installation comprising: at least one source towed from the vessel below the surface of the water and generating a seismic source signal; at least one towed streamer towed from the vessel below the surface of the water and detecting the signal of the seismic source; and an immersible floating device towed below the surface of the water and supporting at least one source level in the water. 3. An offshore seismic installation for waters with obstacles, the installation comprising: an exhaust device located at the end of a seismic towed streamer towed below the surface of the water, while the released device creates resistance when towing a seismic towed streamer; a buoy having a receiver for receiving global positioning system information , for �