Selsmic field recording technique

Details Selsmic field recording technique Selsmic field recording technique

1979-12-19

1981-12-29

Birmiel, Howard A.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 43, 367 56, 367 59, G01V 120, G01V 128

Patent

active

043085970

ABSTRACT:
A method for removing an undesired surface wave from a reflected wave in a method for seismic exploration is accomplished by placing first and second detector arrays at a location on the surface of the earth in the direction of movement of the surface wave. The array has a length less than the length of the shortest wave length of the interfering wave to be eliminated. Signals from both arrays are recorded and processed by first adding the received signals to form a first output, subtracting added signals to form a second output, shifting one of the output signals by 90.degree., adjusting its amplitude and subtracting the phase shifted and adjust signal from the remaining signal thereby removing the surface wave.

REFERENCES:
patent: 1799398 (1931-04-01), Taylor
patent: 1959004 (1934-05-01), Owen
patent: 2087702 (1937-07-01), Peters
patent: 2810444 (1957-10-01), Dyk et al.

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