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Seismic exploration using non-impulsive vibratory sources activated by stationary, Gaussian codes, and processing the results in distortion-free final records particularly useful in urban areas

  • US 4,601,022 A
  • Filed: 08/23/1983
  • Issued: 07/15/1986
  • Est. Priority Date: 08/23/1983
  • Status: Expired due to Fees
First Claim
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1. A method of seismic surveying using non-impulsive vibratory sources that recovers all the essential information of full-waveform recording in a distortion-free manner in an urban area having statutes controlling drive level of such sources to a maximum level Fm (t) which, comprises:

  • A. injecting non-impulsive, seismic vibrations into the earth by activating at least one vibratory source with a driving code of Gaussian, zero-mean, stationary characteristics wherein the drive level Fm (t) is not exceeded;

    B. recording the seismic vibrations that have propagated through the earth from said at least one vibratory source to at least one receiver; and

    C. cross-correlating a full-waveform-preserved representation of said injected vibrations with said received seismic vibrations;

    the result of said cross-correlation being a seismic survey record that is essentially distortion-free.

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