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Resolution of 2D Wenner resistivity imaging as assessed by numerical modelling

Dahlin, Torleif LU and Loke, Meng Heng (1998) In Journal of Applied Geophysics 38(4). p.237-249
Abstract
Modelling of 2D resistivity imaging was done in order to understand the principle resolution of the technique in different geological situations, and for assessing the behaviour of the interpretation methods under controlled circumstances. The Wenner array was used throughout. The results show that the 1D approximation only provides reasonable results in environments with very gradual lateral resistivity changes, otherwise the result may be strongly misleading. Inversion using the 2D quasi-Newton technique results in adequate resolution of the structures in moderately complex environments, but the Gauss–Newton method holds a significant advantage in some complicated cases. The data density can also be of crucial importance for the... (More)
Modelling of 2D resistivity imaging was done in order to understand the principle resolution of the technique in different geological situations, and for assessing the behaviour of the interpretation methods under controlled circumstances. The Wenner array was used throughout. The results show that the 1D approximation only provides reasonable results in environments with very gradual lateral resistivity changes, otherwise the result may be strongly misleading. Inversion using the 2D quasi-Newton technique results in adequate resolution of the structures in moderately complex environments, but the Gauss–Newton method holds a significant advantage in some complicated cases. The data density can also be of crucial importance for the resolution capability, notably of narrow structures. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Geophysics
volume
38
issue
4
pages
237 - 249
publisher
Elsevier
external identifiers
  • scopus:0032001634
ISSN
0926-9851
DOI
10.1016/S0926-9851(97)00030-X
language
English
LU publication?
yes
id
19a2bbca-be78-4709-b510-8cb0d2d0e4b8 (old id 2344583)
date added to LUP
2012-02-27 13:12:27
date last changed
2017-10-22 04:41:02
@article{19a2bbca-be78-4709-b510-8cb0d2d0e4b8,
  abstract     = {Modelling of 2D resistivity imaging was done in order to understand the principle resolution of the technique in different geological situations, and for assessing the behaviour of the interpretation methods under controlled circumstances. The Wenner array was used throughout. The results show that the 1D approximation only provides reasonable results in environments with very gradual lateral resistivity changes, otherwise the result may be strongly misleading. Inversion using the 2D quasi-Newton technique results in adequate resolution of the structures in moderately complex environments, but the Gauss–Newton method holds a significant advantage in some complicated cases. The data density can also be of crucial importance for the resolution capability, notably of narrow structures.},
  author       = {Dahlin, Torleif and Loke, Meng Heng},
  issn         = {0926-9851},
  language     = {eng},
  number       = {4},
  pages        = {237--249},
  publisher    = {Elsevier},
  series       = {Journal of Applied Geophysics},
  title        = {Resolution of 2D Wenner resistivity imaging as assessed by numerical modelling},
  url          = {http://dx.doi.org/10.1016/S0926-9851(97)00030-X},
  volume       = {38},
  year         = {1998},
}