1887

Abstract

Summary

In this paper a discussion is presented of the main aspects describing the challenges expected and encountered in recording and analyzing STB/BTS data in the presence of the steel casing. To this end, numerical simulations of the casing effect are analysed in relation to the many unknown of the system, i.e. casing, overburden and reservoir properties. The discussion highlights the evident need to either remove the distorting component of the field due to the current flow in the casing, or to directly model the response of the entire system, i.e. including the localized highly conductive anomaly of the metallic casing. In the former case, an estimate of the casing effect could be obtained from the recorded data, but the accuracy may not be enough to remove the casing response while keeping a x100 weaker response of the reservoir. In the later case, aside from the numerical burden of the modelling exercise, the properties of the casing may not be known accurately enough to discriminate the subsurface response from the total field dominated by the casing effect.

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/content/papers/10.3997/2214-4609.201901983
2019-06-03
2024-04-19
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References

  1. Baranwal, V. C., and M. C.Sinha
    , [2009], 3D modelling study of borehole seafloor marine CSEM for shallow water case: 71st Annual International Conference and Exhibition Incorporating SPE EUROPEC, EAGE, Extended Abstracts, 3175–3179, doi: 10.3997/2214‑4609.201400507.
    https://doi.org/10.3997/2214-4609.201400507 [Google Scholar]
  2. Colombo, D, and McNeice, G.W.
    [2013] Quantifying surface-to-reservoir electromagnetics for waterflood monitoring in a Saudi Arabian carbonate reservoir. GEOPHYSICS, 78(6), E281–E29.
    [Google Scholar]
  3. Colombo, D., and McNeice, G.W.
    [2018] Surface to borehole CSEM for waterflood monitoring in Saudi Arabia: data analysis. 88th Annual International Meeting, SEG, Expanded Abstracts, 868–872.
    [Google Scholar]
  4. Colombo, D., McNeice, G.W., Cuevas, N., and Pezzoli, M.
    [2018] Surface to Borehole Electromagnetics for Waterflood Monitoring: Results from First Field Deployment. SPE-191544-MS
    [Google Scholar]
  5. Cuevas, N.
    [2012] Casing effect in borehole-surface (surface borehole) EM fields: 74th Annual International Conference and Exhibition Incorporating SPE EUROPEC, EAGE, Extended Abstracts, 2939–2943, doi: 10.3997/2214‑4609.20148566.
    https://doi.org/10.3997/2214-4609.20148566 [Google Scholar]
  6. [2014]. Analytical solutions of EM fields due to a dipolar source inside an infinite casing. Geophysics, 79(5), E231–E241, doi: 10.1190/geo2013‑0223.1.
    https://doi.org/10.1190/geo2013-0223.1 [Google Scholar]
  7. Cuevas, Colombo, D., McNeice, G., Denaclara, H., Minto, J., Yamasaki, T., Aoki, R., Pezzoli, M., Andreis, D., and Roper, T.
    [2015] Field Testing and Characterization of a Transmitter-receiver System for Surface to Borehole Electromagnetic Surveys. 77th EAGE Conference and Exhibition, Extended Abstract.
    [Google Scholar]
  8. Cuevas, N., and Pezzoli, M.
    [2018] On the effect of the metal casing in surface-borehole electromagnetic methods. GEOPHYSICS, 83(3), E173–E187, 10.1190/GEO2017-0055.1
    [Google Scholar]
  9. KongF.N, RothF., OlsenP. and StalheimS.
    , [2009], Casing effects in the sea-to-borehole electromagnetic method, Geophysics, 74, 5, pp F77 – F8.
    [Google Scholar]
  10. Marsala, A. F., M.Al-Buali, Z.Ali, S. M.Ma, Z.He, T.Biyan, G.Zhao, and T.He
    , 2011, First borehole to surface electromagnetic survey in KSA: Reservoir mapping and monitoring at a new scale: 81st Annual International Meeting, SEG, Expanded Abstracts, 1364–1372.
    [Google Scholar]
  11. Swidinsky, A., R. N.Edwards, and M.Jegen
    , 2013, The marine controlled source electromagnetic response of a steel borehole casing: Applications for the Neptune Canada gas hydrate observatory: Geophysical Prospecting, 61, 842–856
    [Google Scholar]
  12. Tang, W., Y.Li, A.Swidinsky, and J.Liu
    , 2015, Three-dimensional controlled-source electromagnetic modelling with a well casing as a grounded source: A hybrid method of moments and finite element scheme: Geophysical Prospecting, 63, 1491–1507
    [Google Scholar]
  13. Tietze, K., C.Patzer, O.Ritter, P.Veeken, and B.Verboom
    , 2016, 3d inversion of controlled-source electromagnetic data in the presence of steelcased wells: 78th Annual International Conference and Exhibition, EAGE, Extended Abstracts
    [Google Scholar]
  14. Tietze, K., O.Ritter, and P.Veeken
    , 2015, Controlled-source electromagnetic monitoring of reservoir oil saturation using a novel borehole-to-surface configuration: Geophysical Prospecting, 63, 1468–1490,
    [Google Scholar]
  15. Um, E., M.Commer, G.Newman, and G.Hoversten
    , 2015, Finite element modelling of transient electromagnetic fields near steel-cased wells: Geophysical Journal International, 202, 901–913,
    [Google Scholar]
  16. Vilamajó, E., V.Puzyrev, P.Queralt, A.Marcuello, and J.Ledo
    , 2016, Study of the casing effect on borehole-to-surface onshore CSEM: 78th Annual International Conference and Exhibition, EAGE, Extended Abstracts
    [Google Scholar]
  17. Yang, W., C.Torres-Verdin
    , J. Hou, and Z. Zhang, 2009, 1D subsurface electromagnetic fields excited by energized steel casing: Geophysics, 74, no. 4, E159–E180
    [Google Scholar]
  18. Wilt, M. and Ranganayaki, R.P.
    [1990] Surface-to-borehole electromagnetic logging for enhanced oil recovery (EOR) applications. 60th Annual International Meeting, SEG, Expanded Abstracts, 532–534.
    [Google Scholar]
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