Marine detector spread having arrays of different lengths

Details Marine detector spread having arrays of different lengths Marine detector spread having arrays of different lengths

1976-08-18

1978-07-18

Birmiel, Howard A.

Communications: electrical

Selective

Having indication or alarm

340 155MC, G01V 138

Patent

active

041018664

ABSTRACT:
A detector spread for marine seismic exploration has arrays with lengths which are dependent upon the acoustic velocity and dip of the subsurface formations being explored, upon the offset distance from the seismic source to the array and upon the reflection time of reflections from formations of interest. Hydrophones are positioned at approximately equally spaced intervals on a towing cable. The outputs of these hydrophones are combined to form arrays having lengths which are multiples of the intervals. Each array has the longest length possible, such that reflection amplitude response will remain in the band 0 .ltoreq. .DELTA.T/.tau. .ltoreq. 1.

REFERENCES:
patent: 3096846 (1963-07-01), Savit et al.
patent: 3335401 (1967-08-01), Kerns
patent: 3400783 (1968-09-01), Lee et al.
patent: 3430193 (1969-02-01), Lindsey et al.
patent: 3613071 (1971-10-01), Quay
patent: 3863201 (1975-01-01), Briggs et al.
patent: 3887897 (1975-06-01), Neitzel
patent: 4011539 (1977-03-01), Rogers

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