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Abstract

Summary

In this study, Elastic reverse time migration (ERTM) along with source normalized cross-correlation imaging condition is proposed to map subsurface geological features with clear physical meanings. RTM is a robust depth migration technique which can efficiently handle the lateral velocity variations, highly dipping reflectors, salt bodies and other complex structures all together. Irregular surface topography is properly honored during the modelling of seismic wave propagation which is not always a straightforward undertaking. The high order DRP/opt MacCormack scheme is used to solve partial differential velocity stress equations. Before back-propagating the receiver wavefield, proper pre-processing techniques are applied to remove surface waves and direct arrivals because only reflected signals are useful to image subsurface reflectors.The source and receiver wavefields are cross-correlated at each specific time step then all snapshots are stacked together to get final RTM results. The numerical experiments clearly demonstrate that our method can handle the surface topography and image subsurface geological features accurately.

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/content/papers/10.3997/2214-4609.201901536
2019-06-03
2024-04-23

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References

  1. Chang, W., and McMechan, G.
    [1986] ‘Reverse-time migration of offset vertical seismic profiling data using the excitation-time imaging condition’, Geophysics, 51(1), p. 67–84.
     [Google Scholar]
  2. Chang, W. and Mcmechan, G. A.
    [1987] ‘Elastic reverse-time migration’, 52(10), pp. 1365–1375.
     [Google Scholar]
  3. Chen Tang, G. A. M.
    [2018] ‘Elastic reverse time migration with a combination of scalar and vector imaging conditions’, SEG Technical Program Expanded Abstracts 2018, pp. 4453–4457.
     [Google Scholar]
  4. Du, Q., Zhu, Y., and Ba, J.
    [2012] ‘Polarity reversal correction for elastic reverse time migration’, Geophysics, 77(2), pp. S31–S41.
     [Google Scholar]
  5. Du, Q., Guo, C., Zhao, Q., Gong, X., Wang, C. and Li, X.
    [2017] ‘Vector-based elastic reverse time migration based on scalar imaging condition’, Geophysics, 82(2), pp. S111–S127.
     [Google Scholar]
  6. Kaelin, B., and Guitton, A.
    [2006] ‘Imaging condition for reverse time migration’:, SEG Eightieth Annual Meeting Expanded Abstract, pp. 2594–2598.
     [Google Scholar]
  7. Loewenthal, D., and Hu, L.
    [1991] ‘2-methods for computing the imaging condition for common-shot prestack migration’, Geophysics, 56(3), pp. 378–381.
     [Google Scholar]
  8. Yan, J., and Sava, P.
    [2007] ‘Elastic wavefield imaging with scalar and vector potentials’, SEG San Antonio Annual Meeting Expanded Abstract, p. 2150–2154.
     [Google Scholar]
  9. Zhang, W. and Chen, X.
    [2006] ‘Traction image method for irregular free surface boundaries in finite difference seismic wave simulation’, Geophysical Journal International, 167(1), pp. 337–353.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201901536
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Elastic Reverse Time Migration with Non-Staggered Grid Finite Difference Modeling Approach
Conference Proceedings 2019, 1 (2019); https://doi.org/10.3997/2214-4609.201901536
/content/papers/10.3997/2214-4609.201901536
/content/papers/10.3997/2214-4609.201901536
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