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Medium frequency pseudo noise geological radar

  • US 6,651,739 B2
  • Filed: 02/21/2001
  • Issued: 11/25/2003
  • Est. Priority Date: 02/21/2001
  • Status: Expired due to Fees
First Claim
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1. A method for detecting interfaces in an earth formation, comprising:

  • generating a plurality of digital pulses;

    producing said plurality of digital pulses at a carrier frequency;

    transmitting said plurality of digital pulses into said geological formation from a first physical position;

    detecting a received signal comprised of reflections from said geological formation due to said transmitting of said plurality of digital pulses;

    over sampling said received signal such that a sampling rate is greater than five times said carrier frequency to produce a digitized received signal;

    gating said digitized received signal for selecting a selected time frame of said received signal to produce a gated digitized received signal;

    correlating said plurality of digital pulses with said gated digitized received signal for detecting an interface at a selected distance from said first physical position.

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