1887

Abstract

Summary

We present the most-recent effort in fine-tuning the earth model at the Thunder Horse production field. This update was initiated because of and in parallel with the new ocean-bottom node survey acquisition in 2015. To minimize uncertainty in the resulting earth model, the chosen approach relies on using all available information. For this imaging exercise, this entails incorporating six surface seismic surveys with differing geometry, five 3D vertical seismic profile (VSP) surveys, three walk-away VSPs, five zero-offset VSPs, multiple sonic logs and well-depth markers in the earth model building process to derive a single anisotropic model that adequately minimizes misfit for all inputs. To achieve this, we use joint tomography of surface and borehole seismic data with simultaneous updates of model parameters, including the VSP transit times and well-depth markers as a data constraint. This strategy resulted in improved surface and borehole seismic images that better resolve structural complexity and stratigraphic details, yielding a more accurate interpretation and more reliable future well placement.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201800685
2018-06-11
2020-07-08
Loading full text...

Full text loading...

References

  1. Bakulin, A., Woodward, M., Nichols, D., Osypov, K. and Zdraveva, O.
    [2010] Building tilted transversely isotropic depth models using localized anisotropic tomography with well information. Geophysics, 75, D27–D36.
    [Google Scholar]
  2. Chakraborty, S., L’Heureux, E., Hartman, K., Li, Q., Ahmed, I., Joy, C., Brenders, A., Sandschaper, J.R. and Mitchell, S.
    [2017] Thunder Horse Ocean Bottom Nodes acquisition design. 76th Annual International Meeting, SEG, Expanded Abstracts, 226–231.
    [Google Scholar]
  3. Futterman, W.I.
    [1962] Dispersive body waves. Journal of Geophysical Research, 67, 5279–5291.
    [Google Scholar]
  4. Hartman, K., Chakraborty, S., Nolte, B., Gou, W., Sun, Q. and Chazalnoel, N.
    [2015] Understanding and improving the subsalt image at Thunder Horse, Gulf of Mexico. 74th Annual International Meeting, SEG, Expanded Abstracts, 4028–4032.
    [Google Scholar]
  5. Li, Y., Wu, H., Wong, W., Hewett, B., Liu, Z., Mateeva, A. and Lopez, J.
    [2015], Velocity Analysis and Update with 3D DAS-VSP to Improve Borehole/Surface Seismic Images. 85th Annual International Meeting, SEG, Expanded Abstracts, 5285–5289
    [Google Scholar]
  6. Reitz, A. and Hartman, K.
    [2017] Demonstrating the value of subsalt 3D VSPs: A case study at Thunder Horse North, Gulf of Mexico. 76th Annual International Meeting, SEG, Expanded Abstracts, 2210–2214.
    [Google Scholar]
  7. Woodward, M., Nichols, D., Zdraveva, O., Whitfield, P. and Johns, T.
    [2008] A decade of tomography. Geophysics, 73, 5–11.
    [Google Scholar]
  8. Zdraveva, O., Ramirez, A., Chen, S. and Woodward, M.
    [2017], Optimized use of 3D VSP data in anisotropic model building for depth imaging, 15th International Congress of the Brazilian Geophysical Society.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201800685
Loading
/content/papers/10.3997/2214-4609.201800685
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