Marine diffraction survey for small object detection
AssigneeMagseis FF LLC
InventorGraham Gillott
Life of this patent
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Abstract
A seabed object detection system is provided. The system can include a receiver array. The receiver array can include a plurality of receivers disposed on a plurality of streamers. The plurality of streamers can include a central port side streamer, a central starboard side streamer, an auxiliary port side streamer and an auxiliary starboard side streamer. The system can include a source array. The source array can include a plurality of sources. The plurality of sources can include a central port side source, a central starboard side source, an auxiliary port side source, and an auxiliary port side streamer.
Claims14
A seabed object detection system, comprising:
- a streamer array including at least one streamer, the at least one streamer comprises a central pair of streamers, the central pair of streamers comprises a central port side streamer and a central starboard side streamer;
- a receiver array including at least one receiver, the at least one receiver disposed on the at least one streamer and the at least one receiver to receive diffraction data, the diffraction data indicative of acoustic waves diffracted off an object in a seabed;
- a source array including at least one source comprising at least one central pair of sources that includes a central port side source and a central starboard side source, wherein each of the central port side source and the central starboard side source includes two sources, wherein the at least one central pair of sources is disposed between the central pair of streamers, and wherein the at least one source further comprises at least one auxiliary port side source and the at least one auxiliary port side source is located between the central port side streamer and a midline of the central port side streamer and at least one auxiliary port side streamer;
- the at least one receiver disposed beyond a critical angle of reflection for the at least one source, the at least one receiver to receive the diffraction data responsive to an acoustic source;
- and
- the critical angle of reflection defined by an angle at which a refracted wave from the acoustic source travels along an interface between the seabed and seawater.
A method of seabed object detection, comprising:
- providing a streamer array including at least one streamer, the at least one streamer comprises a central pair of streamers, the central pair of streamers comprises a central port side streamer and a central starboard side streamer;
- providing a receiver array including at least one receiver, the at least one receiver disposed on the at least one streamer and the at least one receiver to receive diffraction data, the diffraction data indicative of acoustic waves diffracted off a seabed object;
- providing a source array including at least one source comprising at least one central pair of sources that includes a central port side source and a central starboard side source, wherein each of the central port side source and the central starboard side source includes two sources, wherein the at least one central pair of sources is disposed between the central pair of streamers, and wherein the at least one source further comprises at least one auxiliary port side source and the at least one auxiliary port side source is located between the central port side streamer and a midline of the central port side streamer and at least one auxiliary port side streamer;
- disposing the at least one receiver beyond a critical angle of reflection for the at least one source, the at least one receiver to receive diffraction data responsive to an acoustic source, the critical angle of reflection defined by an angle at which a refracted wave from the acoustic source travels along an interface between a seabed and seawater.
Dependencies are inferred from the claim text.