×

Source-independent full waveform inversion of seismic data

  • US 6,999,880 B2
  • Filed: 03/11/2004
  • Issued: 02/14/2006
  • Est. Priority Date: 03/18/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. An iterative method of normalized waveform invasion to obtain a model parameter describing one or more physical properties of a medium, the method comprising the steps of:

  • a) inputting a time domain measurement data set Djid(t), (j=1~NG;

    i=1~NS),where d denotes a data tensor, NG is the number of receivers and NS is the number of sources;

    b) means for minimizing a model parameter m below an error bound in the process of creating a normalized waveform inversion, wherein said minimizing step further comprises;

    i) Fourier transforming the time domain measurement data set Djid(t) to create a measurement spectral data set Djid

    );

    ii) normalizing the measurement spectral data set Djid

    ) to create a normalized data wavefield Tjid

    );

    iii) modeling a medium by iterating the model parameter m describing one or more physical properties of the medium;

    by(1) minimizing a weighted error, between the normalized data wavefield Tjid

    ) and the normalized modeled wavefield Tjim

    ) of the response of the medium, to a level below the error bound;

    (2) outputting the iterated model parameter m corresponding to the weighted error below the error bound, as a minimized model parameter.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×