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Abstract

The multifocusing method consists in stacking seismic data with arbitrary source-receiver distribution<br>according to a new local moveout correction. This moveout correction is based on a local spherical<br>approximation of the reflection wave front in the vicinity of an observation surface. We demonstrate that the<br>multifocusing method does not require any knowledge of the subsurface model and can produce an accurate<br>zero offset section, even in cases of a complex geological structure and low signal-to-noise ratio. The<br>estimated sets of parameters, namely the emergence angle and the wave front curvatures for the normal wave<br>and normal-incidence-point wave, which define the local moveout correction, contain important information<br>regarding the subsurface model and may be used for structural and lithological inversion. We illustrate an<br>application of the multifocusing imaging to synthetic data and compare it with conventional NMO + DMO<br>stacking, prestack time and depth migrations.

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/content/papers/10.3997/2214-4609-pdb.215.sbgf195
1999-08-15
2020-04-04
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.215.sbgf195
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