Method for filtering and combining seismic data having different

Details Method for filtering and combining seismic data having different Method for filtering and combining seismic data having different

1984-08-08

1987-12-22

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 46, 364421, G01V 128, G01V 136

Patent

active

047150211

ABSTRACT:
A method of filtering and combining seismic data, such as data from two or more seismic sources having different spectral characteristics. A plurality of seismic signals are transmitted into a subterranean earth formation and a resulting data trace for each seismic signal is recorded. A correlating signal is generated for each data trace, such that the sum of the correlations of each correlating signal with its associated trace is an approximately minimum phase signal whose frequency amplitude spectrum is the sum of the frequency amplitude spectra of the seismic signals. In a preferred embodiment, the correlating signals are generated by obtaining reference signals representing the seismic signals prior to propagation through the earth formation, concatenating these reference signals and inserting a zero-amplitude signal between each reference signal, and then performing least-squares deconvolution on the concatenated signal. The correlating signal for each trace is identified as the portion of the deconvolved signal which corresponds temporally to the reference signal associated with such trace.

REFERENCES:
patent: 4326271 (1982-04-01), Ziolkawski
patent: 4348749 (1982-09-01), Galbraith
patent: 4486865 (1984-12-01), Rueble
patent: 4486866 (1984-12-01), Muir
patent: 4500978 (1985-02-01), Ziolkawski et al.
Gibson et al, "Predietine Deconvolution and . . . ", 4/84, pp. 379-397, Geophysics, vol. 49, #4.
Bickel, "The Effects of Naise or Minimum-Phase . . . ", 8/82, pp. 1174-1184, Geophysics, vol. 47, #8.
Mashara et al, "Concatenated Sequences . . . ", 5/81, pp. 342-350, IEEE Trans. Aerosp. & Elect. Syst., vol. ACS17 #3 abst. provided.

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