Methods for gathering marine geophysical data
First Claim
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1. A method for gathering geophysical data, comprising:
- towing geophysical data gathering equipment behind a survey vessel in a body of water, the equipment including at least one geophysical source and an array of sensor streamers extending behind the vessel;
determining a geodetic location of a first steering reference point at a forward end of the sensor streamers;
determining a reference direction based on the first steering reference point and a selected location on the survey vessel; and
laterally deflecting both at least one sensor streamer included in the array of sensor streamers and the at least one geophysical source, wherein the laterally deflecting is based on the determined geodetic location of the first steering reference point and the determined reference direction.
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Abstract
In a first embodiment the invention comprises a method for gathering geophysical data, including towing geophysical data gathering equipment behind a survey vessel in a body of water, said equipment including an array of sensor streamers extending behind said vessel, and determining a geodetic location of a streamer steering reference point at a forward end of the sensor streamers and a reference direction. At least one sensor streamer included in said array of sensor streamers is laterally deflected in response to the determined geodetic location of said streamer steering reference point and the determined reference direction.
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Citations
15 Claims
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1. A method for gathering geophysical data, comprising:
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towing geophysical data gathering equipment behind a survey vessel in a body of water, the equipment including at least one geophysical source and an array of sensor streamers extending behind the vessel; determining a geodetic location of a first steering reference point at a forward end of the sensor streamers; determining a reference direction based on the first steering reference point and a selected location on the survey vessel; and laterally deflecting both at least one sensor streamer included in the array of sensor streamers and the at least one geophysical source, wherein the laterally deflecting is based on the determined geodetic location of the first steering reference point and the determined reference direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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at least one geophysical source and an array of streamers towable behind a survey vessel in a body of water; and control equipment configured to; determine a location of a first steering reference point at a forward end of the array of streamers; determine a reference direction based on the first steering reference point and a selected location on the survey vessel; laterally deflect both a selected streamer from the array of streamers and the at least one geophysical source based on the determined location of the first steering reference point and the determined reference direction. - View Dependent Claims (13, 14, 15)
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Specification