Methods for controlling towed marine sensor array geometry
First Claim
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1. A method, comprising:
- towing a plurality of sensor streamers behind a vessel in a body of water, wherein a forward end of each sensor streamer is associated with a respective lateral distance D from a centerline of the vessel;
controlling the plurality of sensor streamers in a first survey mode which includes;
determining, for each sensor streamer, a desired deflection force for a plurality of deflector devices located at different points on that sensor streamer, wherein the desired deflection force is determined according to a monotonically increasing function of the lateral distance D for that sensor streamer; and
applying, to the deflector devices of each sensor streamer, the corresponding desired deflection force.
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Abstract
A method for towing a streamer array includes moving a vessel along a body of water. Streamers are towed by vessel. A relative position is determined at selected points along each streamer with respect to the vessel. At least one of the streamers is deflected at at least one longitudinal position along the streamer in response to the determined positions to maintain the streamers in a selected geometry. The selected geometry is related to one of survey vessel heading, energy source trajectory, previously plotted sensor trajectory and a lateral separation related to distance from the towing vessel.
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Citations
20 Claims
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1. A method, comprising:
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towing a plurality of sensor streamers behind a vessel in a body of water, wherein a forward end of each sensor streamer is associated with a respective lateral distance D from a centerline of the vessel; controlling the plurality of sensor streamers in a first survey mode which includes; determining, for each sensor streamer, a desired deflection force for a plurality of deflector devices located at different points on that sensor streamer, wherein the desired deflection force is determined according to a monotonically increasing function of the lateral distance D for that sensor streamer; and applying, to the deflector devices of each sensor streamer, the corresponding desired deflection force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An article of manufacture including a non-transitory, computer-readable medium having instructions stored thereon that, in response to execution by a computing system, cause the computing system to carry out operations comprising:
controlling a plurality of sensor streamers towed behind a vessel in a body of water in a proportional force separation mode, wherein a forward end of each sensor streamer is associated with a respective lateral distance D from a centerline of the vessel, and wherein the proportional force separation mode includes; determining, for each sensor streamer, a desired deflection force for a plurality of deflector devices located at different points on that sensor streamer, wherein the desired deflection force is determined according to monotonically increasing function of the lateral distance D for that sensor streamer; and causing the desired deflection force to be applied to the deflector devices of each corresponding sensor streamer. - View Dependent Claims (11, 12, 13, 14)
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15. A system, comprising:
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a vessel; a plurality of sensor streamers coupled to the vessel, wherein a forward end of each sensor streamer is associated with a respective lateral distance D from a centerline of the vessel; and a recording system configured to control the plurality of streamers in a first survey mode, including to; determine, for each sensor streamer, a desired deflection force for a plurality of deflector devices located at different points on that sensor streamer, wherein the desired deflection force is determined according to a monotonically increasing function of the lateral distance D for that sensor streamer; and cause the desired deflection force to be applied to the deflector devices of each corresponding sensor streamer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification