1887

Abstract

Summary

With the current global uncertainty in the hydrocarbon exploration environment, it is becoming ever more important to ensure that the maximum value is extracted from existing seismic datasets. Advances in data-processing technology mean that improvements in image accuracy, resolution, signal-to-noise ratio and amplitude fidelity can be made even on conventional datasets acquired and processed within the last few years. Following the this strategy, we recently finished a 3D PSDM re-processing project in the UK North Sea. The survey area comprises 6 different legacy surveys from 3 vendors. To make this project efficient in terms of timing and cost, we used the archived partially pre-processed gathers after denoise and demultiple processing as a starting point for the re-processing. The datasets were carefully matched, merged and regularized to provide a single seamless final product.

Ray-based tomography has been very successful in building sub-surface velocity. However, as many other geophysical inversion problems, tomography suffers from non-uniqueness in the solution. To reduce the uncertainty in the velocity model, numerous extra constraints were introduced in tomography to constrain the inversion result. Here we also show how the velocity model was updated by following the local geological constraints and consequently achieve a much improved final imaging.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201412776
2015-06-01
2024-03-29
Loading full text...

Full text loading...

References

  1. Bakulin, A., Woodward, M., Liu, Y., Zdraveva, O., Nichols, D. and Osypov, K.
    [2010] Application of steering filters to localized anisotropic tomography with well data. 80th SEG Annual International Meeting, Expanded Abstracts, 4286–4290.
    [Google Scholar]
  2. Duquet, B., Chavanne, E., Poupion, J. P., RowlandsM., Santos-LuisB. and Ugolini, J.M.
    [2013] Seismic Processing and Imaging in Central North Sea Area – Recent Advances and Remaining Challenges. 75th EAGE Conference & Exhibition, Expanded Abstracts.
    [Google Scholar]
  3. Jones, I.F.
    [2010] An introduction to velocity model building. EAGE, ISBN 978-90-73781-84-9.
    [Google Scholar]
  4. Guillaume, P., Reinier, M., Lambare, G., Cavalie, A., Adamsen, M. and Bruun, B.
    [2013] Dipconstrained non-linear slope tomography: an application to shallow channel characterization. 75th EAGE Conference & Exhibition, Expanded Abstracts.
    [Google Scholar]
  5. Hilburn, G., He, Y., Yan, Z. and Sherrill, F.
    [2014] High-resolution tomography using offset-dependent picking and inversion conditioned by image-guided interpolation. 76th EAGE Conference & Exhibition, Expanded Abstracts.
    [Google Scholar]
  6. Mao, W., Fletcher, R. and Deregowski, S.
    [2000] Automated interval velocity inversion. 70th SEG Annual International Meeting, Expanded Abstracts.
    [Google Scholar]
  7. Moore, I. and Kostov, C.
    [2002] Stable, Efficient, High-resolution Radon Transforms. 64th EAGE Conference & Exhibition, Expanded Abstracts.
    [Google Scholar]
  8. Nickel, M. and Sønneland, L.
    [1999] Non-Rigid matching of migrated time-lapse seismic. SEG Annual International Meeting, Expanded Abstracts.
    [Google Scholar]
  9. Schonewille, M., Yan, Z., Bayly, M. and Bisley, R.
    [2013] Matching pursuit Fourier interpolation using priors derived from a second data set. 83rd SEG Annual International Meeting, Expanded Abstracts.
    [Google Scholar]
  10. Woodward, M., Nichols, D., Zdraveva, O., Whitfield, P. and Johns, T.
    [2008] A decade of tomography. Geophysics, 73, 5–11.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201412776
Loading
/content/papers/10.3997/2214-4609.201412776
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