1887

Abstract

Summary

The presence of multiples, especially interbed multiples in the reservoir zone, pose an interpretation risk; hence, ambiguity in the extraction of meaningful reservoir properties. In this paper, we present a case study from the Culzean project high-density ocean-bottom cable (HDOBC) survey demonstrating our multiple attenuation approach for predicting and subtracting surface and interbed multiples.

The main differentiators for this study are the use of curvelet transforms for the surface multiple model subtraction and a layer-based method for interbed multiple prediction. The curvelet transform facilitated the separation of conflicting dips in the reservoir zone; hence, a more effective deterministic water layer demultiple and 3D surface-related multiple elimination SRME model subtraction. As the legacy processing and initial analysis of the Culzean data emphasised the fact that interbed multiples have limited velocity discrimination from the primaries in the reservoir zone, conventional methods based on velocity, dip or periodicity are not capable of targeting these multiples. However, with a geophysical constraint on the generator information derived from the borehole data available in the area, the data-driven technique of layer-based interbed multiple prediction provided good results.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201600874
2016-05-31
2020-07-06
Loading full text...

Full text loading...

References

  1. Merry, A., Miguel, K., Hickman, P.
    [2013] Delineating a Sub-Salt field in the Central North Sea Using High Density OBC- A Case study from the Culzean Development. 75th EAGE Conference and Exhibitio n, Expanded Abstract.
    [Google Scholar]
  2. Moore, I. and Bisley, R.
    [2006] Multiple attenuation in shallow-water situations. 68th EAGE Conference and Exhibition, Expanded Abstract, F018.
    [Google Scholar]
  3. Moore, I. and Dragoset, W.H.
    [2008] General Surface Multiple Prediction (GSMP) – A Flexible 3D SRME Algorithm. 70th EAGE Conference and Exhibition, Expanded Abstract, 2426–2429.
    [Google Scholar]
  4. Dawson, A., Wolfarth, S., Leone, C., Salgadoe, M. and Alexandre, R.
    [2014] Surface multiple attenuation development in the Claire Field. 76th EAGE Conference and Exhibition, Expanded Abstract.
    [Google Scholar]
  5. Jakubowicz, H.
    , 1998, Wave equation prediction and removal of interbed multiples. SEG 68th Annual Meeting, Expanded Abstract, 1527–1530
    [Google Scholar]
  6. Wu, Z.J., Sonika, S. and Dragoset, B.
    [2011] Robust internal multiple prediction, 81st SEG Annual Meeting, Expanded Abstract, 3541–3545.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201600874
Loading
/content/papers/10.3997/2214-4609.201600874
Loading

Data & Media loading...

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