Random sampling for geophysical acquisitions
First Claim
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1. A method for designing a geophysical survey having at least one source and at least one receiver, wherein the geophysical survey comprises a plurality of survey locations for the at least one source and the at least one receiver within a survey area, the method comprising:
- randomizing a first set of survey locations from the plurality of survey locations, wherein randomizing the first set of survey locations comprises randomizing the positions of at least one circle center defining a sail line used in the geophysical survey.
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Abstract
The presently disclosed technique includes a method for geophysical survey having at least one source and one receiver, wherein the survey has two sets of survey locations within the survey area, one set of survey locations for the source(s) and the other set of survey locations for the receiver(s), wherein the survey locations in one set are randomized.
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18 Claims
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1. A method for designing a geophysical survey having at least one source and at least one receiver, wherein the geophysical survey comprises a plurality of survey locations for the at least one source and the at least one receiver within a survey area, the method comprising:
randomizing a first set of survey locations from the plurality of survey locations, wherein randomizing the first set of survey locations comprises randomizing the positions of at least one circle center defining a sail line used in the geophysical survey. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12)
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7. A method for designing a geophysical survey having at least one source and at least one receiver, wherein the geophysical survey comprises a plurality of survey locations for the at least one source and the at least one receiver within a survey area, the method comprising:
randomizing a set of survey locations from the plurality of survey locations using a method selected from the group consisting of a Hammersley and Halton point method, a jittering method and a Poisson sampling method.
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13. A method for designing a geophysical survey having at least one source and at least one receiver, wherein the geophysical survey comprises a plurality of survey locations for the at least one source and the at least one receiver within a survey area, the method comprising:
randomizing a set of survey locations from the plurality of survey locations, wherein randomizing the set of survey locations comprises determining survey locations to be positions on overlapping circles, wherein the centers of the overlapping circles are randomized locations within the survey area.
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14. A geophysical survey system, comprising:
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a plurality of sources; a plurality of receivers; and at least one controller controlling the sources and receivers, wherein the at least one controller is configured to position the sources and the receivers at a plurality of survey locations, wherein the survey locations comprise randomized positions for at least one circle center that defines a sail line used in the geophysical survey system. - View Dependent Claims (15, 16, 17)
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18. A method for designing a geophysical survey having at least one source and at least one receiver, wherein the geophysical survey comprises a plurality of survey locations for the at least one source and the at least one receiver within a survey area, the method comprising:
randomizing a set of survey locations from the plurality of survey locations, wherein randomizing the set of survey locations comprises permitting streamers in which the at least one receiver is situated to drift off their respective sail lines while maintaining a crossline streamer separation.
Specification