1887
Volume 38 Number 6
  • ISSN: 0263-5046
  • E-ISSN: 1365-2397

Abstract

Abstract

Distributed Acoustic Sensor (DAS) is increasingly recognized as a viable alternative to downhole geophone arrays for the acquisition of borehole seismic (VSP – Vertical Seismic Profile) or DAS-VSP data. When acquiring surface seismic data in the field, simultaneously acquired DAS-VSP data in an available well or wells can provide full well VSP imaging and significantly enhance surface seismic data processing. Borehole seismic data can provide higher resolution structural images around the borehole as the receivers are located inside a borehole and near the reservoir. In addition, the formation velocity, deconvolution operator, absorption, attenuation (Q value), anisotropy parameters and other reservoir formation information in a certain range around the wellbore can be obtained directly from the VSP data. These can be used to significantly enhance the surface 3D seismic data processing, such as velocity model calibration and modification, static correction, deconvolution, demultiple processing, high frequency restoration, anisotropic migration, and Q-compensation or Q-migration.

In this project, Q-migration was conducted with the enhanced Q-field data volume obtained from the joint inversion of both the near surface 3D Q-field data volume from uphole data and the mid-deep layer Q-field data volume from VSP data. The Q-migration results show much sharper and more focused faults and fracture zones. A new 3D formation top structural model was built with much finer details based on the Q-migration data, and three new borehole locations were recommended to the client. The final drilling results on these three new boreholes are very successful with high volume of commercial oil flow.

Loading

Article metrics loading...

/content/journals/10.3997/1365-2397.fb2020039
2020-06-01
2024-04-26
Loading full text...

Full text loading...

References

  1. Caussen, E. and Ursin, B.
    [2000]. Viscoacoustic Reserve-Time migration. Journal of Seismic Exploration, 9 (2), 165–183.
    [Google Scholar]
  2. Chen, Y. Z., Li, Y. P., Zhao, H., Jin, Q. H., Wang, X. M. and Liang, X.
    [2012]. Improving the precision of surface seismic data processing by walkaway-VSP. 74th EAGE Conference & Exhibition incorporating SPE EUROPEC, A032.
    [Google Scholar]
  3. Correa, J., Egorov, A., Tertyshnikov, K., Bona, A., Pevzner, R., Dean, T., Freifeld, B. and Marshall, S.
    [2017]. Analysis of signal to noise and directivity characteristics of DAS VSP at near and far offsets - A CO2CRC Otway Project data example. The Leading Edge, 36 (12), 994a1–994a7.
    [Google Scholar]
  4. Correa, J., Pevzner, R., Popik, S., Tertyshnikov, K., Bona, A. and Freifeld, B.
    [2018]. Application of 3D VSP acquired with DAS and 3C geophones for site characterization and monitoring program design: preliminary results from Stage 3 of the CO2CRC Otway project. SEG International Exposition and 88th Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  5. Dai, N. and West, G. F.
    [1994]. Reserve Q migration. SEG International Exposition and 66th Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  6. Daley, T., Freifeld, B., Ajo-Franklin, J., Dou, S., Pevzner, R., Shulakova, V., Kashikar, S., Miller, D., Götz, J., Henninges, J. and Lüth, S.
    [2013]. Field testing of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring. The Leading Edge, 32 (6), 699–706.
    [Google Scholar]
  7. Daley, T.M., Miller, D.E., Dodds, K., Cook, P. and Freifeld, B.M.
    [2016]. Field testing of modular borehole monitoring with simultaneous distributed acoustic sensing and geophone vertical seismic profiles at Citronelle, Alabama. Geophysical Prospecting, 64 (5), 1318–1334.
    [Google Scholar]
  8. Dean, T. and Correa, J.
    [2017]. The Determination of the Seismic Quality Factor Q from VSP Data Acquired Using Distributed Acoustic Sensing. 79th EAGE Conference and Exhibition, Extended Abstracts.
    [Google Scholar]
  9. Frignet, B. and Hartog, A.
    [2014]. Optical vertical seismic profile on wireline cable. SPWLA 55th Annual Logging Symposium.
    [Google Scholar]
  10. Hartog, A., Frignet, B., Mackie, D. and Clark, M.
    [2014]. Vertical seismic optical profiling on wireline logging cable. Geophysical Prospecting,62 (4), 693–701.
    [Google Scholar]
  11. Jiang, T., Zhan, G., Hance, T., Sugitanto, S., Soulas, S. and Kjos, E.
    , [2016]. Valhall dual-well 3D DAS VSP field trial and imaging for active wells. SEG International Exposition and 86th Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  12. La Follett, J., Wyker, B., Hemink, G., Hornman, K., Lumens, P., Franzen, A.
    [2014]. Evaluation of fiber-optic cables for use in Distributed Acoustic Sensing: commercially available cables and novel cable designs. SEG International Exposition and 84th Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  13. Lesnikov, V., Allanic, C.
    [2014]. DAS VSP acquisition – perspectives and challenges. 76th EAGE Conference and Exhibition, Extended Abstracts.
    [Google Scholar]
  14. Li, Y. P., Chen, Y. Z., Peng, J. and Jin, Q. H.
    [2010]. Walkaway VSP Multi-wave Imaging over a Gas Cloud Area. 72nd EAGE Conference & Exhibition incorporating SPE EUROPEC, Extended Abstracts.
    [Google Scholar]
  15. Madsen, K., Thompson, M., Parker, T. and Finfer, D.
    , 2013, A VSP field trial using distributed acoustic sensing in a producing well in the North Sea. First break, 31, 51–56.
    [Google Scholar]
  16. Mateeva, A., Mestayer, J., Cox, B., Kiyashchenko, D., Wills, P., Lopez, J., Grandi, S., Hornman, K., Lumens, P., Franzen, A., Hill, D. and Roy, J.
    [2012]. Advances in distributed acoustic sensing (DAS) for VSP. SEG International Exposition and 82nd Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  17. Mateeva, A., Lopez, J., Potters, H., Mestayer, J., Cox, B., Kiyashchenko, D., Wills, P., Grandi, S., Hornman, K., Kuvshinov, B., Berlang, W., Yang, Z. and Detomo, R.
    [2014]. Distributed acoustic sensing for reservoir monitoring with vertical seismic profiling. Geophysical Prospecting, 62, 679–692.
    [Google Scholar]
  18. Mateeva, A., Lopez, J., Chalenski, D., Tatanova, M., Zwartjes, P., Yang, Z., Bakku, S., K. de Vos, K. and Potters, H.
    [2017]. 4D DAS VSP as a tool for frequent seismic monitoring in deep water. The Leading Edge,36, 995–1000.
    [Google Scholar]
  19. Mittet, R., Sollie, R. and Hokstad, K.
    [1995]. Prestack depth migration with compensation for absorption and dispersion. Geophysics, 60 (5), 1485–1494.
    [Google Scholar]
  20. Parker, T., Shatalin, S. and Farhadiroushan, M.
    [2014]. Distributed Acoustic Sensing – a new tool for seismic applications. First Break, 32, 61–69.
    [Google Scholar]
  21. Sun, X. G., Lin, Y., Gao, J., Sun, Z. S. and Lin, J. X.
    [2009]. Anisotropic parameter calculation by walkaway VSP and full azimuth seismic data. SEG International Exposition and 79th Annual Meeting, Expanded Abstracts.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.3997/1365-2397.fb2020039
Loading
/content/journals/10.3997/1365-2397.fb2020039
Loading

Data & Media loading...

  • Article Type: Research Article
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