Steel-cased wells can be used as galvanic sources to detect and estimate variations in subsurface electrical conductivity. Most of the modeling approaches are based on approximations to the casing and ignore the variations in magnetic permeability. In this paper, we investigate the impact of varying electrical conductivity and magnetic permeability on the electromagnetic response of steel-cased wells. As an example, we consider a full three-dimensional realistic representation of a steel-cased well in the surface-to-borehole and borehole-to-surface configurations. We show how the variable conductivity and permeability along the length of the casing can affect the electromagnetic measurements.


Article metrics loading...

Loading full text...

Full text loading...


  1. Alumbaugh, D.L., Newman, G.A., Prevost, L. and Shadid, J.N.
    [1996] Three-dimensional wideband electromagnetic modeling on massively parallel computers. Radio Science, 31(1),1–23.
    [Google Scholar]
  2. Augustin, A.M., Kennedy, W.D., Morrison, H.F. and Lee, K.H.
    [1989] A theoretical study of surface-to-borehole electromagnetic logging in cased holes. Geophysics, 54, 90–99.
    [Google Scholar]
  3. Cuevas, N.
    [2016] Field distortion due to surface pipes in surface to borehole electromagnetic. Proceedings of the 78th EAGE Conference and Exhibition, EAGE.
    [Google Scholar]
  4. Haber, E., Schwarzbach, C. and Shekhtman, R.
    [2016] Modeling electromagnetic fields in the presence of casing. SEG Technical Program Expanded Abstracts, SEG, 959–964.
    [Google Scholar]
  5. Heagy, L.J., Cockett, R., Oldenburg, D.W. and Wilt, M.
    [2015] Modelling electromagnetic problems in the presence of cased wells. SEG Technical Program Expanded Abstracts, SEG, 699–703.
    [Google Scholar]
  6. Kaufman, A.
    [1990] The electrical field in a borehole with casing. Geophysics, 55, 29–38.
    [Google Scholar]
  7. Noh, K., Oh, S., Seol, S.J., Lee, K.H. and Byun, J.
    [2016] Analysis of anomalous electrical conductivity and magnetic permeability effects using a frequency domain controlled-source electromagnetic method. Geophysical Journal International, 204(3), 1550–1564.
    [Google Scholar]
  8. Pardo, D., Torres-Verdin, C., Nam, M.J., Paszynski, M. and Calo, V.M.
    [2008] Fourier series expansion in a non-orthogonal system of coordinates for the simulation of 3D alternating current borehole resistivity measurements. Computer Methods in Applied Mechanics and Engineering, 197(45), 3836–3849.
    [Google Scholar]
  9. Puzyrev, V., Vilamajo, E., Queralt, P., Ledo, J. and Marcuello, A.
    [2017] Three-dimensional modeling of the casing effect in onshore controlled-source electromagnetic surveys. Surveys in Geophysics, 1–19, doi: 10.1007/s10712‑016‑9397‑8.
    https://doi.org/10.1007/s10712-016-9397-8. [Google Scholar]
  10. Um, E.S., Commer, M., Newman, G.A. and Hoversten, G.M.
    [2015] Finite element modelling of transient electromagnetic fields near steel-cased wells. Geophysical Journal International, 202(2), 901–913.
    [Google Scholar]
  11. Wu, X. and Habashy, T.M.
    [1994] Influence of steel casings on electromagnetic signals. Geophysics, 59(3), 378–390.
    [Google Scholar]
  12. Yang, W., Torres-Verdin, C., Hou, J. and Zhang, Z.
    [2009] 1D subsurface electromagnetic fields excited by energized steel casing. Geophysics, 74(4), E159–E180.
    [Google Scholar]

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