Patent ID: 7295490
Filing Date: 2007-11-13
Classification: G01V

Abstract:
1. A method of evaluating a suite of vibrator sweep signals for use in a vibratory seismic survey, wherein said suite of vibrator sweep signals is for use with a predetermined number of sweeps and a predetermined number of vibrators, wherein said predetermined number of sweeps is greater than or equal to said predetermined number of vibrators, comprising the steps of: a. calculating a Fourier transform of each of said vibrator suite sweep signals in said suite of vibrator sweep signals, thereby producing a plurality of Fourier transformed sweep signals; b. selecting at least one frequency; c. for each of said plurality of Fourier transformed sweep signals, identifying a numerical value corresponding to said selected at least one frequency, thereby obtaining a same number of identified numerical values as Fourier transformed sweep signals; d. calculating at least a largest and a smallest eigenvalue using at least said identified numerical values; and, e. using at least said largest and said smallest eigenvalues to evaluate said suite of vibrator sweep signals.