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Abstract

Summary

There are two fundamental effects associated with seismic wave propagation in the real Earth media: amplitude attenuation and velocity dispersion. It is of great importance to correct for these effects in the migration. A decoupled fractional Laplacian method has a major advantage that it accounts for the amplitude absorption and velocity dispersion effects separately, which allows the wave equation to be adapted for accurately compensating for the attenuating effects in migration. In order to take into account of spatially variable Q, we apply a low-rank approximation to the fractional Laplacian. This method preserves the major advantage of decoupled amplitude absorption and velocity dispersion effects. Since the only difference between our RTM scheme and conventional acoustic RTM scheme is the kernel for seismic modelling, it requires very little effort to the conventional framework of acoustic RTM.

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/content/papers/10.3997/2214-4609.201601211
2016-05-30
2024-04-24

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References

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601211
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Reverse-time Migration with Spatially Variable Q
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201601211
/content/papers/10.3997/2214-4609.201601211
/content/papers/10.3997/2214-4609.201601211
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