Simultaneous inversion for source wavelet and AVO parameters from prestack seismic data
First Claim
1. A method of seismic data processing, the method comprising:
- (a) obtaining prestack seismic data containing a plurality of reflectors;
(b) utilizing non-parallel moveout of said plurality of reflectors to determine a source wavelet using an L2-Norm and a reflectivity parameter using an L1-Norm.
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Abstract
The present invention provides for a method and apparatus for seismic data processing. Prestack seismic data is obtained that contains a plurality of reflectors. Non-parallel moveout of the plurality of reflectors is utilized to determine a source wavelet using an L2-Norm and a reflectivity parameter using an L1-Norm. The source wavelet and reflectivity parameters can be determined simultaneously. Source and reflectivity determination may further comprise minimization of a model objective function. The model objective function may be a function of at least one of i) said source wavelet, ii) a gradient parameter and iii) an intercept parameter. An AVO intercept and gradient parameters can be determined using the determined source wavelet and reflectivity parameter. Constraints may be placed on parameters to ensure physically realistic solutions.
99 Citations
20 Claims
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1. A method of seismic data processing, the method comprising:
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(a) obtaining prestack seismic data containing a plurality of reflectors; (b) utilizing non-parallel moveout of said plurality of reflectors to determine a source wavelet using an L2-Norm and a reflectivity parameter using an L1-Norm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of obtaining AVO parameters from seismic data, the method comprising:
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(a) obtaining prestack seismic data containing a plurality of reflectors; (b) utilizing non-parallel moveout of said plurality of reflectors to determine a source wavelet using an L2-Norm and AVO parameters intercept and gradient using L1-Norms. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method of obtaining a source wavelet and AVO parameters from seismic data, the method comprising:
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(a) obtaining prestack seismic data containing a plurality of reflectors; and (b) minimizing a model objective function utilizing non-parallel moveout of said plurality of reflectors to simultaneously determine a source wavelet using an L2-Norin and an AVO parameters intercept and gradient using L1-Norms.
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Specification