1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 76th EAGE Conference and Exhibition 2014
  5. Conference paper

Abstract

Summary

A streamlined and semi-automated Pre-stack depth migration velocity model building approach has been used to solve imaging distortions caused by near surface channel systems in offshore Tanzania. In this abstract we show how,

  • an automated shallow channel extraction algorithm, and,
  • a whole volume based pre-stack anomaly extraction algorithm,

were used in unison to identify potential prospects impacted by shallow channels. An automated shallow channel extraction algorithm was developed and used in PreSDM velocity model building. Coupled with wavelet shift tomography this successfully solved the imaging distortions associated with the shallow channel systems.

We focus on key aspects of the PreSDM velocity model building, which are transferable to other areas where the near surface impacts deeper imaging, and are suited to exploration schedules. The main learning’s have been:

  • PreSDM is preferred over PreSTM even for compressed exploration schedules, and,
  • Whole volume analysis of pre-stack migrated gathers complements prospectivity assessment and processing objectives.
© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20141106
2014-06-16
2024-04-26

  • From This Site

    /content/papers/10.3997/2214-4609.20141106
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Edgar, J.A. and Selvage, J.I.
    [2013] Dynamic Intercept-gradient Inversion. 75th EAGE Conference & Exhibition.
     [Google Scholar]
  2. Jones, C.E., Valler, V., Dean, S., Sherazi-Selby, H. and Bystoel, L.
    [2013] Improving Gather Picking for Tomography in Complex Velocity Models, a Case Study on Shale Diapirs. 75th EAGE Conference & Exhibition.
     [Google Scholar]
  3. Lambaré, G.
    [2008] Stereotomography. Geophysics, 73, VE25–VE34.
     [Google Scholar]
  4. Rieber, F.
    [1936] Visual presentation of elastic wave patterns under various structural conditions. Geophysics, 1, 196–218.
     [Google Scholar]
  5. Selvage, J.I. and Edgar, J.A.
    [2013] Rapid Screening of Pre-stack Seismic for Hydrocarbon Prospectivity. 75th EAGE Conference & Exhibition.
     [Google Scholar]
  6. Sherwood, J., Sherwood, K., Tieman, H. and Schleicher, K.
    [2008] 3D beam prestack depth migration with examples from around the world. SEG Technical Program Expanded Abstract.
     [Google Scholar]
  7. Sherwood, J., Jiao, J., Tieman, H., Sherwood, K., Zhou, C., Lin, S. and Brandsberg-Dahl, S.
    [2011] Hybrid tomography based on beam migration. SEG Technical Program Expanded Abstract.
     [Google Scholar]
  8. Woodward, M.J., Nichols, D., Zdraveva, O., Whitfield, P. and Johns, T.
    [2008] A decade of tomography. Geophysics, 73, VE5–VE11.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20141106
Loading
Unifying Tomography & Pre-stack Anomaly Detection in PreSDM to Correct for Near Surface Channels in Exploration Settings
Conference Proceedings 2014, 1 (2014); https://doi.org/10.3997/2214-4609.20141106
/content/papers/10.3997/2214-4609.20141106
/content/papers/10.3997/2214-4609.20141106
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