Patent Document ID: 20040186667
Application ID: 10799131
Patent Flag: 0

Claim One:
1. An iterative method of normalized waveform inversion 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 D ji d (t), (j&equals;1˜NG; i&equals;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 D ji d (t) to create a measurement spectral data set D ji d (&ohgr;); ii) normalizing the measurement spectral data set D ji d (&ohgr;) to create a normalized data wavefield T ji d (&ohgr;); 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 T ji d (&ohgr;) and the normalized modeled wavefield T ji m (&ohgr;) 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.