Instantaneous spectral analysis
AssigneeGas Technology Institute
InventorsJohn P. Castagna, Robert W. Siegfried, II, Shengjie Sun
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Abstract
A method of seismic data processing is described in which a particular wavelet is selected from a plurality of wavelets as being most characteristic of a received seismic signal. A subtracted signal can be determined by subtracting a weighted signal of the particular wavelet from the received signal. From the subtracted signal, an additional particular wavelet can be chosen. The process of subtracting a signal and determining an additional particular one of the plurality of wavelets can be repeated until a criterion is met. The method can be repeated at several depths. The resultant spectral analysis can be used to determine, for example, an absorption coefficient.
Claims6
A method of seismic data processing, the method comprising:
- (a) using a seismic source for propagating seismic waves into an earth formation and receiving a signal indicative of a property thereof, said signals resulting from interaction of said seismic waves with the earth formation;
- (b) defining a plurality of wavelets characteristic of said received signal;
- (c) determining a particular one of said plurality of wavelets most characteristic of said received signal, and
- (d) adding said particular one of said plurality of wavelets to a select list of wavelets.
Dependencies are inferred from the claim text.