1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 77th EAGE Conference and Exhibition 2015
  5. Conference paper

Abstract

Summary

Full waveform inversion (FWI) iteratively minimizes the misfit between the recorded and modelled seismic data to derive an accurate velocity model. The method can produce high-resolution velocity models, provided that the target areas are well-sampled by the seismic waves (e.g. shallow targets with refracted waves and deep targets with reflected waves). Here, we present an application of FWI to a wide-azimuth dataset from the Gulf of Mexico. Due to the large water depth, refracted and diving waves are not well represented in the recorded data. Thus, the inversion must rely on the reflected waves. This in turn places more stringent requirements on the fidelity of the computed amplitudes, so variable density was included in the inversion. Through reflection FWI, we were able to obtain a velocity model with much higher resolution than is shown in the preliminary, ray-tomography model. We observed that the FWI model improve the flatness of common-image gathers and the quality of the stacked, migrated images. Furthermore, the small-scale velocity features revealed by FWI correlated well with the migrated image.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201413201
2015-06-01
2024-04-19

  • From This Site

    /content/papers/10.3997/2214-4609.201413201
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Gardner, G.H.F., Gardner, L.W., and Gregory, A.R.
    [1974] Formation velocity and density – the diagnostic basics for stratigraphic traps, Geophysics, 39, 770–780.
     [Google Scholar]
  2. Ramos-Martinez, J., Crawley, S., Kelly, S., and Tsimelzon, B.
    [2011] Full-waveform inversion by pseudo-analytic extrapolation, 81st Annual Meeting, SEG, Expanded Abstracts, 2684–2688.
     [Google Scholar]
  3. Ramos-Martinez, J, Zou, K., Kelly, S., Tsimelzon, B.
    [2013] Reflection FWI from fully deghosted towed-streamer data: A field data example. 83rd Annual International Meeting, SEG, Expanded Abstracts2013: 887–891.
     [Google Scholar]
  4. Sirgue, L., Barkved, O.J., Van Gestel, J.P, Askim, O.J. and Kommedal, J.H.
    [2009] 3D waveform inversion on Valhall wide-azimuth OBC, 71st EAGE Conference & Exhibition, Extended Abstracts, U038.
     [Google Scholar]
  5. Vigh, A. Starr, B., Kapoor, J., and Li, H.
    [2010] 3D Full Waveform Inversion on a Gulf of Mexico WAZ Data Set, 80th Annual Meeting, SEG, Expanded Abstracts, 957–961.
     [Google Scholar]
  6. Warner, M., Ratcliffe, A., Nangoo, T., Morgan, J., Umpleby, A., Shah, M., Vinje, V., Štek, I., Guasch, L., Win, C., Conroy, G. and Bertrand, A.
    [2013] Anisotropic 3D full-waveform inversion, Geophysics, 78, R59–R80.
     [Google Scholar]
  7. Zou, Z., Ramos-Martínez, J., Kelly, S., Ronholt, G., Langlo, L.T., Valenciano Mavilio, A., Chemingui, N. and Lie, J.E.
    [2014] Refraction Full-waveform Inversion in a Shallow Water Environment, 76th EAGE Conference & Exhibition, Extended Abstracts, E106
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201413201
Loading
Reflection Full Waveform Inversion for a Wide-azimuth Dataset in the Gulf of Mexico
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201413201
/content/papers/10.3997/2214-4609.201413201
/content/papers/10.3997/2214-4609.201413201
Loading

Data & Media loading...

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