Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Offshore prospecting
Patent
1983-12-28
1987-02-17
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Offshore prospecting
367 57, 367 61, G01V 138, G01V 100
Patent
active
046445080
ABSTRACT:
A method and apparatus are disclosed for selectively reinforcing an acoustic wave traveling in a first predetermined direction in a body of water while attenuating an acoustic wave traveling in a second opposite direction. The output signals from vertically spaced receivers are appropriately delayed and summed to reinforce a wave traveling in the first direction and attenuate the wave traveling in the opposite direction. The invention is particularly useful for reinforcing desirably detected ascending acoustic waves and attenuating undesirably detected surface reflected descending waves.
REFERENCES:
patent: 3343626 (1967-09-01), Sparks
patent: 3371310 (1968-02-01), Silverman
patent: 3952281 (1976-04-01), Parrack
patent: 3967233 (1976-06-01), Maguer et al.
patent: 4064479 (1977-12-01), Ruehle
patent: 4242740 (1980-12-01), Ruehle
patent: 4244037 (1981-01-01), Jelks
patent: 4441174 (1984-04-01), Ray et al.
Galperin, E. I., Verticle Seismic Profiling, Society Exploration Geophysicists, #12, 1973, pp. 1-101.
Gilman Michael G.
Jordan Charles T.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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