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Abstract

Summary

This abstract presents the results of the first attempt at inverting data from the Electromagnetic Multifrequency method to resolve 2D structures. This method’s observations are the radial magnetic component of the field generated by a very large loop of current on the surface, at distances of several kilometers, and at a wide range of frequencies. The method is being applied with good results in sedimentary basins in Brazil. We present examples of 2D inversion of synthetic data, applying two regularization methods. The results give an indication of the resolving power of this kind of data to delineate bi-dimensional geoelectric structures.

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/content/papers/10.3997/2214-4609.201413069
2015-06-01
2024-04-26
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References

  1. Axelsson, O. and Barker, V.A.
    [2001] Finite Element Solution of Boundary Value Problems, Theory and Computation. Classics in applied mathematics, Society for Industrial and Applied Mathematics.
    [Google Scholar]
  2. Constable, S.C., Parker, R.L. and Constable, C.G.
    [1987] Occam’s inversion: a practical algorithm for generating smooth models from em sounding data. Geophysics, 52(3), 289–300.
    [Google Scholar]
  3. Dias, C.A., de Lima HédisonK. Sato, O.A.L. and Moraes, J.A.C.
    [2006] Contribution to oil exploration and development - a successful inductive multi-frequency em survey on-shore brazil. EAGE 68th Conference & Exhibition, EAGE.
    [Google Scholar]
  4. Key, K.
    [2012] Is the fast hankel transform faster than quadrature?Geophysics, 77(3), F21–F30.
    [Google Scholar]
  5. Lima, W.A., Martins, C.M., Silva, J.B.C. and Barbosa, V.C.F.
    [2011] Total variation regularization for depth-to-basement estimate: Part 2 — physicogeologic meaning and comparisons with previous inversion methods. Geophysics, 76(1), I13–I20, doi:10.1190/1.3524547.
    https://doi.org/10.1190/1.3524547 [Google Scholar]
  6. Machado, M.V.B. and Dias, C.A.
    [2012] Zone of main contribution to the measured signal for a circular current loop source and receiver on the surface of a conductive half-space. Geophysical Prospecting, 60(6), 1167–1185, ISSN 00168025, doi:10.1111/j.1365‑2478.2011.01042.x.
    https://doi.org/10.1111/j.1365-2478.2011.01042.x [Google Scholar]
  7. Martins, C.M., Lima, W.A., Barbosa, V.C.F. and Silva, J.B.C.
    [2011] Total variation regularization for depth-to-basement estimate: Part 1 — mathematical details and applications. Geophysics, 76(1), I1–I12, doi: 10.1190/1.3524286.
    https://doi.org/10.1190/1.3524286 [Google Scholar]
  8. Mitsuhata, Y.
    [2000] 2-d electromagnetic modeling by finite-element method with a dipole source and topography. Geophysics, 65(2), 465–475, doi:10.1190/1.1444740.
    https://doi.org/10.1190/1.1444740 [Google Scholar]
  9. Silva, V.d.S.E., Régis, C. and Howard, A.Q.
    [2014] Complex plane integration in the modelling of electromagnetic fields in layered media: part 1. Application to a very large loop. Journal of Geophysics and Engineering, 11(1), 015004, ISSN 1742-2132, doi:10.1088/1742‑2132/11/1/015004.
    https://doi.org/10.1088/1742-2132/11/1/015004 [Google Scholar]
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