1887

Abstract

Summary

In recent years there has been tremendous progress made on the seismic migration and velocity model-updating technology to achieve better resolution and higher positioning accuracy, thus providing more valuable information to reduce exploration risk. In a dataset from offshore North Africa, the velocity model building is challenging due to a highly faulted geological setting and the presence of gas hydrates in the shallow overburden. Furthermore the image resolution beneath these diffracting and absorptive bodies is poor if we do not compensate for the resulting attenuation. This case study illustrates how a combination of sophisticated velocity update technologies, such as full waveform inversion and the latest tomography developments, together with Q-prestack depth migration, can achieve high quality seismic imaging.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201700553
2017-06-12
2024-03-29
Loading full text...

Full text loading...

References

  1. Gamar-Sadat, F., Guillaume, P., Pica, A., Pignot, G., Poggi, P., Henry-Baudot, A., Prescott, A., Gacha, A., Carotti, D. and Prieux, V.
    [2015] Automatic Gas Pockets Detection by High resolution Volumetric Q-tomography Using Accurate Frequency Peak Estimation. 77th EAGE Conference & Exhibition, Extended Abstracts, Th N107 10.
    [Google Scholar]
  2. Guillaume, P., Lambaré, G., Sioni, S., Carotti, D., Dépré, P., Culianez, G., Montel, J.-P., Mitouard, P., Depagne, S., FrehersS. and Vosberg, H.
    [2011] Geologically consistent velocities obtained by high definition tomography. 81st SEG annual meeting, Expanded Abstracts, 4061–4065.
    [Google Scholar]
  3. Guillaume, P., Reinier, M., Lambaré, G., Cavalié, A., Adamsen, M.I., and Bruun, B.M.
    [2013] Dip-constrained Non-linear Slope Tomography - an Application to Shallow Channel Characterization. 75th EAGE Conference & Exhibition, Extended Abstracts, Tu 02 09.
    [Google Scholar]
  4. Ratcliffe, A., Jupp, R., Wombell, R., Body, G., Durussel, V., Fernandes, A., Gosling, B. and Lombardi, M.
    [2013] Full-waveform inversion of variable-depth streamer data: an application to shallow channel modelling in the North Sea. The Leading Edge, 32(9), 1110–1115.
    [Google Scholar]
  5. Wang, P., Ray, S., Peng, C., Li, Y. and Poole, G.
    [2013] Premigration deghosting for marine streamer data using a bootstrap approach in tau-p domain. 83rd SEG annual meeting, Expanded Abstracts, 4221–4225.
    [Google Scholar]
  6. Yu, Z., Wang, P., Wray, B., Ray, S., Zhao, W. and Z.Zhang
    [2015] Preconditioning input data for full waveform inversion using dipole sparse tau-p inversion. 85th SEG annual meeting, Expanded Abstracts, 1122–1126.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201700553
Loading
/content/papers/10.3997/2214-4609.201700553
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