High-frequency content boost for vibratory seismic source and method

摘要

Computer software, controller and method for generating a desired pilot signal for driving a vibratory source. The method includes steps for selecting a pilot target amplitude spectrum for the vibratory source; determining an initial pilot signal that matches the pilot target amplitude spectrum; associating the initial pilot signal with first and second frequency bands, the second frequency band including a high-frequency end of a range of the vibratory source; band-passing a first part of the initial pilot signal associated with the first frequency band with a first band-pass configuration; band-passing a second part of the initial pilot signal associated with the second frequency band with a second band-pass configuration; level compressing the first and second parts of the initial pilot signal; recombining the first and second parts of the initial pilot signal to form a recombined pilot signal; and processing the recombined pilot signal to obtain the desired pilot signal.

主权项

1. A method for generating with a computing device a desired pilot signal for driving a vibratory source to generate seismic waves, the method comprising:
selecting a pilot target amplitude spectrum for the vibratory source; determining an initial pilot signal that matches the pilot target amplitude spectrum; associating the initial pilot signal with first and second frequency bands, the second frequency band including a high-frequency end of a range of the vibratory source; selecting a first band-pass configuration for the first frequency band and a second band-pass configuration for the second frequency band; band-passing a first part of the initial pilot signal associated with the first frequency band with the first band-pass configuration; band-passing a second part of the initial pilot signal associated with the second frequency band with the second band-pass configuration; level compressing the first and second parts of the initial pilot signal; recombining the first and second parts of the initial pilot signal to form a recombined pilot signal; and processing the recombined pilot signal to obtain the desired pilot signal, wherein the desired pilot signal boosts the high-frequency end of the range of the vibratory source comparative to the initial pilot signal.