Use of four-electrode arrays in three-dimensional electrical resistivity imaging survey |
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| Authors: | Ahmad Neyamadpour W A T Wan Abdullah Samsudin Taib |
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| Institution: | (1) Korea Institute of Geoscience and Mineral Resources, 30 Kajung-dong Yusung-gu, 305-350 Daejeon, South Korea;(2) Department of Geology, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria |
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| Abstract: | The objective of this paper is to investigate the applicability of four-electrode arrays in 3D electrical resistivity imaging
survey. A 3D resistivity imaging survey was carried out along fourteen parallel lines using dipole-dipole, Wenner-Schlumberger,
and Wenner arrays with 2 m minimum electrode spacings. Roll-along measurements using a line spacing of 1 m were carried out
covering a grid of 20 × 14 electrodes. The 3D least squares algorithm, based on the robust inversion method, was used in the
inversion of the 3D apparent resistivity data sets. The results show that the 3D electrical resistivity imaging survey using
the Wenner-Schlumberger and the dipole-dipole arrays, or the Wenner and the dipole-dipole arrays, in combination with an appropriate
3D inversion method, can be highly useful when the site conditions do not allow using the pole-pole or pole-dipole arrays. |
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