Method for calculating the optimum vibrator spacing for ground r

Details Method for calculating the optimum vibrator spacing for ground r Method for calculating the optimum vibrator spacing for ground r

1995-02-06

1996-04-23

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 40, 364421, G01V 1143, G01V 128

Patent

active

055110401

ABSTRACT:
A method for increasing the signal-to-coherent-noise ratio of seismic signals propagating along multi-azimuthal trajectories by abating Rayleigh wave contamination. A plurality of seismic receivers surround a nest of vibrators separated by a first uniform incremental spacing whereupon the vibrators emit chirp signals. The chirp signals are received by the seismic sensors, the received signals are stacked, auto-correlated, integrated and the integrated signal level is tabulated as a function of vibrator separation. The first vibrator separation is repeatedly uniformly expanded by a selected increment and the steps of emitting, receiving, stacking, auto-correlating and tabulating are repeated after each incremental separation. The separation corresponding to the minimal integrated signal level is selected.

REFERENCES:
patent: 3277977 (1966-10-01), Siberman
patent: 3479638 (1969-11-01), Rusnah
patent: 4403312 (1983-09-01), Thomason
patent: 4758998 (1988-07-01), Johnson et al.
Sallas, J. J.; 57 Oh Annu Soc. Explor. Geophys. Int. Ortg., Oct. 11, 1987, pp. 236-238, ISBN 0-931830-52-4.
Anstiy, N. A.,; Leading Edge, vol. 5, #3, pp. 40-51 Mar. 1986.

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