1887
  1. Home
  2. A-Z Publications
  3. Geophysical Prospecting
  4. Volume 60, Issue 4
  5. Article
Volume 60 Number 4
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

In 2008, a wide azimuth simultaneous source (SimSrc) 3D data set was acquired over an area coinciding with an existing conventional wide azimuth survey. Using two (nearly) simultaneous sources provided twice the number of shots, an increased shot density and twice the fold for essentially the same acquisition time. Although the improved sampling for the SimSrc data was predicted to yield improvements in processes such as 3D multiple attenuation and migration, cross‐talk between the sources was a concern. Cross‐talk can be suppressed by known techniques such as separation algorithms that estimate the individual shots and thereby separate SimSrc records into their constituent shots. However, separation algorithms available at the time suffered from aliasing and were not effective for severely shot‐aliased data such as those encountered in the experimental data set, which had a 75‐m in‐line shot spacing, half that typical for wide azimuth geometries.

In this paper we present a new separation technique called the Alternating Projection Method (APM), which is demonstrated to be robust in the presence of aliasing. Through comparisons with conventional wide azimuth data we show that 3D multiple removal and migration are both aided by the increase in shots. Moreover, the high quality of the APM separated data indicates that prestack products such as migration angle gathers will have better quality than was achieved a few years ago using a passive separation approach. We found that by carefully selecting and tailoring the method's projection operators, excellent separation results can be achieved efficiently.

© 2012 European Association of Geoscientists & Engineers
Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.2011.01038.x
2012-02-13
2024-04-19

  • From This Site

    /content/journals/10.1111/j.1365-2478.2011.01038.x
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. AbmaR.L., ManningT., TanisM., YuJ. and FosterM.2010. High quality separation of simultaneous sources by sparse inversion. 72nd EAGE Meeting, Barcelona, Spain, Expanded Abstracts, B003.
  2. AkerbergP., HampsonG., RickettJ., MartinH. and ColeJ.2008. Simultaneous source separation by sparse Radon transform. 78th SEG Annual Meeting, Las Vegas, USA, Expanded Abstracts 27, 2801–2805.
  3. BeasleyC.J.2008. A new look at marine simultaneous sources.The Leading Edge27, 914–917.
    [Google Scholar]
  4. BeasleyC.J., ChambersR.E. and JiangZ.1998. A new look at simultaneous sources. 68th SEG Annual Meeting, New Orleans, USA, Expanded Abstracts 17, 133–135.
  5. BerkhoutA.J.G.2008. Changing the mindset in seismic data acquisition. The Leading Edge27, 924–938.
    [Google Scholar]
  6. DoulgerisP., MahdadA. and BlacquiereG.2010. Separation of blended impulsive sources using an iterative approach. 72nd EAGE Meeting, Barcelona, Spain, Expanded Abstracts, B004.
  7. DragosetW.H., LiH., CooperL., EkeD., KapoorJ., MooreI. and BeasleyC.2009. A 3D wide‐azimuth field test with simultaneous marine sources. 71st EAGE Meeting, Amsterdam, The Netherlands, Expanded Abstracts, Z037.
  8. HalperinI.1962. The product of projection operators. Acta Scientiarum Mathematicarum23, 96–99.
    [Google Scholar]
  9. HampsonG., StefaniJ. and HerkenhoffF.2008. Acquisition using simultaneous sources.The Leading Edge27, 918–923.
    [Google Scholar]
  10. MenkeW.H.1991. Applications of the POCS method to interpolating topography and other geophysical fields.Geophysical Research Letters18, 435–438.
    [Google Scholar]
  11. MooreI.2010. Simultaneous sources – Processing and applications. 72nd EAGE Meeting, Barcelona, Spain, Expanded Abstracts, B001.
  12. MooreI., BeasleyC.J. and DragosetW.H.2010. Separating seismic signals produced by interfering seismic sources. U.S. Patent Application. US 2010/0271904 A1.
  13. NeubergerJ.W.2009. Sobolev gradients and differential equations . Springer‐Verlag. ISBN 3642040403.
    [Google Scholar]
  14. Von NeumannJ.1940. Functional Operators Volume 2. Annals of Mathematical Studies, 22.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.2011.01038.x
Loading
A 3D simultaneous source field test processed using alternating projections: a new active separation method
Geophysical Prospecting 60, 591 (2012); https://doi.org/10.1111/j.1365-2478.2011.01038.x
/content/journals/10.1111/j.1365-2478.2011.01038.x
/content/journals/10.1111/j.1365-2478.2011.01038.x
Loading

Data & Media loading...

  • Article Type: Research Article
Keyword(s): Acquisition; Data Processing; Imaging; Signal Processing

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