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Method and device for acquisition of seismic data

  • US 4,914,636 A
  • Filed: 10/20/1988
  • Issued: 04/03/1990
  • Est. Priority Date: 10/20/1987
  • Status: Expired due to Fees
First Claim
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1. Method of acquiring seismic data in a prospecting area comprising, in order to establish a trace, the steps of:

  • (a) disposing on or over the terrestrial surface in said prospecting area an array of vibration receivers, said array including at least one row of regularly spaced receivers,(b) disposing in the vicinity of said array a plurality of vibration sources each adapted to emit vibrations with a frequency spectrum in a specific frequency band, the frequency bands of the spectra of said sources being adjacent and together covering the frequency band of seismic data signals, a high-frequency first source being placed at the center of said array and a low-frequency second source being placed near an end of said array, said first source emitting vibrations at a higher frequency than said second source, said first and second sources having adjacent vibration frequency spectra and being separated by a distance substantially equal to one half the length of said array,(c) emitting vibrations with different frequency spectra from said first and second sources,(d) recording said vibrations after reflection from strata beneath the terrestrial surface by means of said receivers,(e) moving said sources relative to said array in an acquisition direction by a trace displacement increment, and(f) repeated the above steps (c), (d) and (e) for a plurality of successive movements by said trace displacement increment.

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