1887

Abstract

Summary

3D pre-stack depth imaging was conducted for an 1800 km2 narrow-azimuth streamer survey in the Baffin Bay, West Greenland. The survey area is characterised by a hard, shallow and rugose sea bed as well as a high-velocity Quaternary layer immediately beneath. The seismic data are therefore plagued with serious multiple contamination and degraded signal-to-noise ratio. The velocity model building of the Quaternary layer with the conventional tomographic approach is challenging due to the lack of offset coverage and poor data quality on the whole. To tackle these challenges, the high-fidelity depth imaging presented here focuses on three key components: (1) enhanced multiple attenuation with the Shallow Water Demultiple (SWD) technique; (2) incorporating 3D Full Waveform Inversion (FWI) in the velocity model building flow to effectively resolve the details of Quaternary velocity variations - and (3) high-end imaging with the amplitude-preserving Controlled Beam Migration (CBM) to mitigate migration artefacts and further improve signal-noise ratio in the image domain.

We demonstrate the effectiveness of the methodology and show the step change in the resulting image quality, which contributed to robust and optimal structural interpretations throughout the survey area.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20140684
2014-06-16
2024-03-28
Loading full text...

Full text loading...

References

  1. Guillaume, P., Zhang, X., Prescott, A., Lambare, G., Reinier, M., Montel, J.P., and Cavalie, A.
    , [2013]. Multi-layer non-linear slope tomography. 75th EAGE Conference & Exhibition, Extended Abstracts.
    [Google Scholar]
  2. Ratcliffe, A., Jupp, R., Wombell, R., Body, G., Durussel, V., Fernandes, A., Gosling, B., Lombardi, M.
    , [2013]. Full-waveform inversion of variable-depth streamer data: An application to shallow channel modelling in the North Sea. The Leading Edge, Vol. 32, No. 9.
    [Google Scholar]
  3. Roende, H., Andersen, J., Calvert, D., Valasek, P., Walker, R., Duve, A.
    , [2013]. Designing, acquiring and processing a 1800 km2 arctic 3D seismic survey, Baffin Bay, Greenland. 83rd SEG Conference & Exhibition, Extended Abstracts.
    [Google Scholar]
  4. Vinje, V., Roberts, G., Taylor, R.
    , [2008]. Controlled Beam Migration: a versatile structural imaging tool, First Break, Vol. 26, pages 109–113.
    [Google Scholar]
  5. Yang, K.L. and Hung, B.
    , [2013]. Shallow Water Demultiple using hybrid multichannel prediction. 75th EAGE Conference & Exhibition, Extended Abstracts.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20140684
Loading
/content/papers/10.3997/2214-4609.20140684
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