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Cross-well connectivity mapping including separation of compressional and shear wave energy

  • US 6,009,043 A
  • Filed: 04/03/1998
  • Issued: 12/28/1999
  • Est. Priority Date: 08/30/1996
  • Status: Expired due to Term
First Claim
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1. A method of determining continuity of earth formations between wellbores from analysis of seismic energy imparted to the formations at selected of depths in one wellbore and received at selected depths in another wellbore, comprising:

  • separating compressional and shear components of said seismic energy;

    for each of said compressional and said shear components, determining a frequency spectrum of said seismic energy over selected paths, each of said paths including one of said selected depths at which said seismic energy is imparted and one of said selected depths at which said energy is received;

    for each of said compressional and said shear components, calculating transmissivity of said earth formations, at individual frequencies, for each of said paths for a plurality of said frequencies in said frequency spectrum;

    summing said calculated transmissivity values, for each said individual frequency, for each of said compressional and said shear components, at depth and position locations common to more than one of said paths.

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