Patent ID: 8976623
Filing Date: 2015-03-10
Classification: G01V

Abstract:
1. A method for geophysical surveying, comprising: towing a first and a second streamer laterally spaced apart through a body of water at a depth of at least 25 meters, each of the first and second streamers comprising geophysical sensors disposed thereon at spaced apart locations; maintaining lateral separation of at least 150 meters between the first and second streamers using at least two submersible deflectors, wherein each of the two submersible deflectors are individually coupled by a line to a separate one of the first and second streamers, wherein the two submersible deflectors have a weight that is at least one third the lift force generated as the submersible deflectors are towed through a body of water at a speed of about 2 to about 6 knots; wherein the two submersible deflectors are configured to have negative buoyancy and provide lateral thrust and vertical thrust as moved through the body of water; and detecting signals using the geophysical sensors while the first and second streamers are towed at the depth of at least 25 meters.