1887
  1. Home
  2. Conferences
  3. Conference Proceedings
  4. 77th EAGE Conference and Exhibition 2015
  5. Conference paper

Abstract

Summary

Electromagnetic (EM) methods are an accepted tool to reduce offshore hydrocarbon exploration risk. One of the companies offering such a service is the Norwegian geophysical company PetroMarker, which acquires offshore time domain CSEM data with a vertical stationary transmitter and vertical E-field sensors placed on the sea bed.

In many cases a 1D inversion approach will give a good enough understanding of such data. Still, to fully exploit the information inherent in the data set and enhance the resolution of subsurface features it is necessary to account for geometrical effects such as bathymetry and the lateral extension of the resistive features through 2D or 3D inversion.

Recently a new 2D time domain inversion code for CSEM data with induced polarization (IP) capability was developed based on the well-established frequency domain MARE2DEM finite element code.

Accounting for induced polarization allows for a wider range of transmitter receiver offsets in a single 2D inversion run. In this paper we show some first examples of this code on synthetic and field data. It is found that a resistivity structure can fast and reliably be recovered, also in the presence of induced polarization.

© EAGE Publications BV
Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201413213
2015-06-01
2024-04-25

  • From This Site

    /content/papers/10.3997/2214-4609.201413213
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Barsukov, P., Fainberg, E. and Singer, B.
    [2007] A method for hydrocarbon reservoir mapping and apparatus for use when performing the method. International patent WO 2007/053025.
     [Google Scholar]
  2. Constable, S.
    [2010] Ten years of marine CSEM for hydrocarbon exploration. Geophysics, 75(5), 75A67–75A81.
     [Google Scholar]
  3. El Kaffas, A.M., Frafjord, Ø., Helwig, S.L. and Eide, K.
    [2013] Vertical Dipole Electromagnetic Survey to Reduce Hydrocarbon Exploration Risk, Kakelborg – A Case Study. 75th EAGE Conference & Exhibition, We 04 08.
     [Google Scholar]
  4. Flekkøy, E.G. and Hansen, A.
    [2015] An effective medium derivation of the Cole-Cole relation for electric conductivity. Geophysics, 80 (2), E23–E28.
     [Google Scholar]
  5. Holten, T., Flekkøy, E.G., Singer, B., Blixt, E.M., Hanssen, A. and Måløy, K. J.
    [2009] Vertical source, vertical receiver, electromagnetic technique for offshore hydrocarbon exploration. First Break, 27, 89–93.
     [Google Scholar]
  6. Holten, T., Singer, B. and Flekkøy, E.G.
    [2010] Effects of a limited reservoir and induced polarization on acquisition with vertical electrodes. SEG Technical Program Expanded Abstracts 2010. 874–878.
     [Google Scholar]
  7. Holten, T., Commer, M., Newman, G. and Helwig, S.L.
    [2014] 3D Inversion of Vertical Dipole – Time Domain CSEM data. 76th EAGE Conference & Exhibition.
     [Google Scholar]
  8. Key, K. and Ovall, J.
    [2011] A parallel goal-oriented adaptive finite element method for 2.5-D electromagnetic modelling, Geophys J Int, 186 (1), 137–154.
     [Google Scholar]
  9. Key, K.
    [2012a] Is the fast Hankel transform faster than quadrature?Geophysics, 77 (3), F21–F30.
     [Google Scholar]
  10. [2012b] Marine EM inversion using unstructured grids: a 2D parallel adaptive finite element algorithm, SEG Technical Program Expanded Abstracts 2012, 1–5.
     [Google Scholar]
  11. Pelton, W. H., Ward, S.H., Hallof, P. G., Sill, W. R. and NelsonP. H.
    [1978] Mineral discrimination and removal of inductive coupling with multifrequency IP, Geophysics, 43 (3), 588–609.
     [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201413213
Loading
Time Domain 2D CSEM Inversion with Induced Polarization
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201413213
/content/papers/10.3997/2214-4609.201413213
/content/papers/10.3997/2214-4609.201413213
Loading

Data & Media loading...

Most Cited This Month Most Cited RSS feed

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