Pressure and velocity detectors for seismic exploration

Details Pressure and velocity detectors for seismic exploration Pressure and velocity detectors for seismic exploration

1981-08-25

1984-12-04

Wilbur, Maynard R.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367 46, G01V 136

Patent

active

044868650

ABSTRACT:
Pressure and velocity detectors produce outputs which are combined to substantially cancel ghost reflections. The pressure detector produces a positive output in response to upwardly travelling compressional waves and a negative output in response to downwardly travelling rarefaction waves. The velocity detector for this is a positive output in response to upwardly travelling compressional waves and a positive output in response to downwardly travelling rarefaction waves. These outputs are filtered so that the impulse response of the rarefaction waves cancels. The filtered outputs are combined to produce an output in which the ghost reflection is substantially suppressed.

REFERENCES:
patent: 2740945 (1956-04-01), Howes
patent: 3274542 (1966-09-01), Ruehle
patent: 3290645 (1966-12-01), Pavey, Jr. et al.
patent: 3863201 (1975-01-01), Briggs et al.
patent: 4134097 (1979-01-01), Cowles
patent: 4210897 (1980-07-01), Hutchins
patent: 4348749 (1982-09-01), Galbraith, Jr.

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