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Combination of ID laterally constrained inversion and smooth inversion of resistivity data with a priori data from boreholes

Wisén, Roger LU ; Auken, E and Dahlin, Torleif LU (2005) In Near Surface Geophysics 3(2). p.71-78
Abstract
Resistivity imaging in combination with borehole information is a powerful tool for site investigation. We show that the combination of 1D laterally constrained inversion (1D-LCI) with the use of a priori information from borehole data and 2D smooth inversion adds significant value to the interpretation of continuous vertical electrical sounding (CVES) data. The ID-LCI offers an analysis of the resolution of the model parameters. This is helpful when evaluating the integrity of the model. Furthermore, with the 1D-LCI it is possible to constrain model parameters with a priori information, e.g. depth-to-layer interfaces, based on borehole information. We show that 2D smooth inversion resolves lateral changes well, while 1D-LCI results in... (More)
Resistivity imaging in combination with borehole information is a powerful tool for site investigation. We show that the combination of 1D laterally constrained inversion (1D-LCI) with the use of a priori information from borehole data and 2D smooth inversion adds significant value to the interpretation of continuous vertical electrical sounding (CVES) data. The ID-LCI offers an analysis of the resolution of the model parameters. This is helpful when evaluating the integrity of the model. Furthermore, with the 1D-LCI it is possible to constrain model parameters with a priori information, e.g. depth-to-layer interfaces, based on borehole information. We show that 2D smooth inversion resolves lateral changes well, while 1D-LCI results in well-defined horizontal layer interfaces. In geological environments where the lateral variations are not too pronounced, the 1D-LCI contributes to a geological interpretation of the resistivity measurements. Depths to layers can be interpreted with greater certainty than if using results from 2D smooth inversion only. The inclusion of a priori information in the inversion reveals further details and enhances the geological interpretation significantly. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Near Surface Geophysics
volume
3
issue
2
pages
71 - 78
publisher
EAGE
external identifiers
  • wos:000232533600002
ISSN
1873-0604
language
English
LU publication?
yes
id
4cbeb2a7-12f5-4310-98ad-6b95d50547ef (old id 220115)
date added to LUP
2007-08-08 11:21:13
date last changed
2016-04-15 19:35:44
@article{4cbeb2a7-12f5-4310-98ad-6b95d50547ef,
  abstract     = {Resistivity imaging in combination with borehole information is a powerful tool for site investigation. We show that the combination of 1D laterally constrained inversion (1D-LCI) with the use of a priori information from borehole data and 2D smooth inversion adds significant value to the interpretation of continuous vertical electrical sounding (CVES) data. The ID-LCI offers an analysis of the resolution of the model parameters. This is helpful when evaluating the integrity of the model. Furthermore, with the 1D-LCI it is possible to constrain model parameters with a priori information, e.g. depth-to-layer interfaces, based on borehole information. We show that 2D smooth inversion resolves lateral changes well, while 1D-LCI results in well-defined horizontal layer interfaces. In geological environments where the lateral variations are not too pronounced, the 1D-LCI contributes to a geological interpretation of the resistivity measurements. Depths to layers can be interpreted with greater certainty than if using results from 2D smooth inversion only. The inclusion of a priori information in the inversion reveals further details and enhances the geological interpretation significantly.},
  author       = {Wisén, Roger and Auken, E and Dahlin, Torleif},
  issn         = {1873-0604},
  language     = {eng},
  number       = {2},
  pages        = {71--78},
  publisher    = {EAGE},
  series       = {Near Surface Geophysics},
  title        = {Combination of ID laterally constrained inversion and smooth inversion of resistivity data with a priori data from boreholes},
  volume       = {3},
  year         = {2005},
}