Time variant filter for range dependent tuning

Details Time variant filter for range dependent tuning Time variant filter for range dependent tuning

1984-03-30

1986-12-09

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 43, 367 47, 364421, G01V 136

Patent

active

046284915

ABSTRACT:
A method and apparatus for enhancing the resolution of true variations of a seismic signal amplitude as a function of range. A time-variant bandpass filter is impressed upon the seismic data having a bandpass frequency dependent upon the range between the seismic sources and the seismic receivers of a common depth point array of seismic sources and seismic receivers. A maximum bandpass frequency is derived from the maximum range between the seismic sources and the seismic receivers of a common depth point array of seismic sources and seismic receivers. The maximum bandpass frequency is adapted to accommodate time varying ranges as well as time varying stacking velocities so as to produce a seismic signal having enhanced resolution of amplitude variations of the seismic signal.

REFERENCES:
patent: 2716733 (1955-08-01), Roark
patent: 3421141 (1969-01-01), Meyerhoff
patent: 3806929 (1974-04-01), Moore
patent: 4034373 (1977-07-01), de Pierre et al.
patent: 4209854 (1980-06-01), Ruehle
patent: 4375640 (1983-03-01), Harvey
"The Digital Processing of Seismic Data", Silverman Daniel, Geophysics, vol. 32, #6, 12/67, p. 988.
"The Limits of Resolution of Zero Phase Wavelets", Kallweit et al., Geophysics, vol. 47, 1982, p. 1035.

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