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Seismic exploration method and apparatus for cancelling non-uniformly distributed noise

  • US 4,890,264 A
  • Filed: 03/21/1988
  • Issued: 12/26/1989
  • Est. Priority Date: 03/21/1988
  • Status: Expired due to Term
First Claim
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1. A method of seismic exploration comprising the steps of:

  • generating and applying seismic waves to the surface of the earth, said waves traveling into the earth and reflecting from formations in the earth and also traveling along the surface of the earth in a nonuniformly distributed manner;

    placing a plurality of seismic detectors on the surface of the earth at a plurality of locations spaced on the surface of the earth from the point of application of said seismic waves for receiving said seismic waves reflecting from formations in the earth;

    placing at each of said plurality of locations at least one surface wave detector adapted to receive said nonuniformly distributed surface waves;

    placing at least one mechanical noise detector adapted to receive mechanical noise signals proximate to a source of nonuniform mechanical noise; and

    adaptively processing said seismic waves received at each of said plurality of locations in combination with said nonuniformly distributed surface waves received at each of said plurality of locations and said received mechanical noise signal to produce an output signal representative of seismic waves reflecting from formations in the earth.

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