1887
ASEG2009 - 20th Geophysical Conference
  • ISSN: 2202-0586
  • E-ISSN:
PDF

Abstract

Introduction

Recently, reverse-time migration (RTM) has drawn a lot of attention in the industry. Unlike one-way wave equation migration, RTM does not need to deal with the theory of singular pseudo-differential operators. A straightforward implementation of RTM correctly handles complex velocities and produces a complete set of acoustic waves (reflections, refractions, diffractions, multiples, evanescent waves, etc.). The RTM propagator also carries the correct propagation amplitude and imposes no dip limitations on the image. In the past, the strong migration artifacts and the intensive computational cost have been the two major problems that prevented RTM from being used in production. In this paper, we first formulate RTM based on inversion theory and then we address some solutions to suppress the low frequency migration artifacts. At the end, we propose harmonic-source migration as a way to improve the efficiency of delayed-shot RTM.

© 2009 ASEG
Loading

Article metrics loading...

/content/journals/10.1071/ASEG2009ab033
2009-12-01
2026-01-23

  • From This Site

    /content/journals/10.1071/ASEG2009ab033
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Baysal, E., Kosloff, D. D. and Sherwood, J. W. C., 1984, A two-way nonreflecting wave equation: Geophysics, 49, 132-141.
  2. Billette, F. J. and Brandsberg-Dahl, S., 2005, The 2004 BP velocity benchmark: 67th Ann. Mtg.: EAGE, B035.
  3. Fletcher, R. F., Fowler, P., Kitchenside, P. and Albertin, U., 2005, Suppressing artifacts in prestack reverse time migration, 75th Ann. Mtg.: SEG, 2049-2051
  4. Liu, F., Zhang, G., Morton, S. and Leveille, J., 2007, Reverse-time migration using one-way wavefield imaging condition, 77thAnn. Mtg: SEG, 2170-2174.
  5. Mulder, W. A. and Plessix R.-E., 2003, One-way and two-way wave equation migration, 73rd Ann. Mtg: SEG, 881-884.
  6. Sava, P. C. and Fomel, S., 2003, Angle-domain common-image gathers by wavefield continuation methods: Geophysics, 68, 1065-1074.
  7. Whitmore, N. D., 1995, An imaging hierarchy for common angle plane wave seismograms: Ph.D. thesis, University of Tulsa.
  8. Yoon, K., Marfurt, K. J. and Starr, W., 2004, Challenges in reverse-time migration: 74th Ann. Mtg.: SEG, 1057-1060.
  9. Zhang, Y., Zhang, G. and Bleistein, N., 2005b, Theory of true amplitude one-way wave equations and true amplitude common-shot migration: Geophysics, 70, El-10.
  10. Zhang, Y., Sun, J., Gray, S. and Young, J., 2006, Sampling issues in delayed-shot migration and common-shot migration: 68th Mtg.: EAGE, GO 12.
  11. Zhang, Y., Xu, S., Bleistein, N. and Zhang, G., 2007a, True amplitude angle domain common image gathers from one-way wave equation migrations: Geophysics, 72, S49-58.
  12. Zhang, Y., Sun, J. and Gray, S., 2007b, Reverse-time migration: amplitude and implementation issues, 77thAnn. Mtg.: SEG, 2145-2149.
/content/journals/10.1071/ASEG2009ab033
Loading
  • Article Type: Research Article
Keyword(s): harmonic-source; migration; noise; reverse-time; trae-amplitude

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error