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Abstract

Summary

To overcome defects of conventional least-squares reverse time migration, we propose a least-squares reverse time migration algorithm in pseudo-time domain. Our algorithm reduce the depth/velocity ambiguities; and the imaging results are less affected by the velocity error. It relieves the accuracy requirements on migration velocity model of least-squares migration. Numerical tests shows that our algorithm can bear about 20% velocity error. Compared to the conventional method in depth domain, the pseudo-time domain algorithm eliminates the irregular wavelength sampling in vertical direction. Thus it can reduce the vertical grid points and memory requirement. Numerical tests and land field data confirms the effectiveness of our method and its suitability for complex models.

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/content/papers/10.3997/2214-4609.201601376
2016-05-30
2024-04-28

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References

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Least-squares Reverse Time Migration in Pseudo-time Domain
Conference Proceedings 2016, 1 (2016); https://doi.org/10.3997/2214-4609.201601376
/content/papers/10.3997/2214-4609.201601376
/content/papers/10.3997/2214-4609.201601376
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