A Fast Imaging Technique Applied to 2D Electrical Resistivity Data
A new technique is proposed to process 2D apparent resistivity datasets, in order to obtain a fast and contrasted resistivity image, useful for a rapid data check in field or as a starting model to constrain the inversion procedure. In the past some modifications to the back-projection algorithm, as...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Geophysics |
| Online Access: | http://dx.doi.org/10.1155/2014/846024 |
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| author | Raffaele Martorana Patrizia Capizzi |
| author_facet | Raffaele Martorana Patrizia Capizzi |
| author_sort | Raffaele Martorana |
| collection | DOAJ |
| description | A new technique is proposed to process 2D apparent resistivity datasets, in order to obtain a fast and contrasted resistivity image, useful for a rapid data check in field or as a starting model to constrain the inversion procedure. In the past some modifications to the back-projection algorithm, as well as the use of filtering techniques for the sensitivity matrix were proposed. An implementation of this technique is proposed here, considering a two-step approach. Initially a damped least squares solution is obtained after a full matrix inversion of the linearized geoelectrical problem. Furthermore, on the basis of the results, a subsequent filtering algorithm is applied to the Jacobian matrix, aiming at reducing smoothness, and the linearized damped least square inversion is repeated to get the final result. This fast imaging technique aims at increasing the resistivity contrasts and practically, since it does not require a parameter set optimization, it can be used to easily obtain fast and preliminary results. The proposed technique is tested on synthetic data, the objective of which is to find the optimal parameter set. Finally, two field cases are discussed and the comparison between back-projection and inversion is shown. |
| format | Article |
| id | doaj-art-6b71caf6905f4feeae1e48dd3d4b5834 |
| institution | Kabale University |
| issn | 1687-885X 1687-8868 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Geophysics |
| spelling | doaj-art-6b71caf6905f4feeae1e48dd3d4b58342025-02-03T01:10:17ZengWileyInternational Journal of Geophysics1687-885X1687-88682014-01-01201410.1155/2014/846024846024A Fast Imaging Technique Applied to 2D Electrical Resistivity DataRaffaele Martorana0Patrizia Capizzi1Dipartimento di Scienze della Terra e del Mare, University of Palermo, Via Archirafi 26, 90123 Palermo, ItalyDipartimento di Scienze della Terra e del Mare, University of Palermo, Via Archirafi 26, 90123 Palermo, ItalyA new technique is proposed to process 2D apparent resistivity datasets, in order to obtain a fast and contrasted resistivity image, useful for a rapid data check in field or as a starting model to constrain the inversion procedure. In the past some modifications to the back-projection algorithm, as well as the use of filtering techniques for the sensitivity matrix were proposed. An implementation of this technique is proposed here, considering a two-step approach. Initially a damped least squares solution is obtained after a full matrix inversion of the linearized geoelectrical problem. Furthermore, on the basis of the results, a subsequent filtering algorithm is applied to the Jacobian matrix, aiming at reducing smoothness, and the linearized damped least square inversion is repeated to get the final result. This fast imaging technique aims at increasing the resistivity contrasts and practically, since it does not require a parameter set optimization, it can be used to easily obtain fast and preliminary results. The proposed technique is tested on synthetic data, the objective of which is to find the optimal parameter set. Finally, two field cases are discussed and the comparison between back-projection and inversion is shown.http://dx.doi.org/10.1155/2014/846024 |
| spellingShingle | Raffaele Martorana Patrizia Capizzi A Fast Imaging Technique Applied to 2D Electrical Resistivity Data International Journal of Geophysics |
| title | A Fast Imaging Technique Applied to 2D Electrical Resistivity Data |
| title_full | A Fast Imaging Technique Applied to 2D Electrical Resistivity Data |
| title_fullStr | A Fast Imaging Technique Applied to 2D Electrical Resistivity Data |
| title_full_unstemmed | A Fast Imaging Technique Applied to 2D Electrical Resistivity Data |
| title_short | A Fast Imaging Technique Applied to 2D Electrical Resistivity Data |
| title_sort | fast imaging technique applied to 2d electrical resistivity data |
| url | http://dx.doi.org/10.1155/2014/846024 |
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