Examine Horizontal Resolution of Dipole-Dipole Array Using Synthetic Models Of 2D and 3D Tomography Techniques

Authors

  • Ahmed S. Al-Zubedi Remote Sensing and Geophysics College, AlKarkh University of Science, Baghdad, IRAQ.
  • Zaidoon T. Abdulrazzaq Space Research and Technology Center, Scientific Research Commission, Baghdad, IRAQ. https://orcid.org/0000-0002-0234-0872

DOI:

https://doi.org/10.22452/

Keywords:

Horizontal Resolution, Dipole-Dipole Array, 2D and 3D Tomography Techniques

Abstract

The horizontal resolution of the array is the most important factor in accurately mapping subsurface features and ensuring reliable geological interpretations in electrical resistivity surveys. Therefore, six two-dimensional (2D) and three-dimensional (3D) synthetic models were used to assess the horizontal resolution of the Dipole-Dipole array. In each synthetic model, two identical structures with a resistivity of 100Ωm are embedded within a medium of 30Ωm. The horizontal distance between the structures is varied between 2m, 3m, and 4m. The results revealed that the Dipole-Dipole array shows difficulties in delineating the exact location and size of the structures. It provides a distorted image of the structures' locations. It shows better resolution with 2D inverse models compared to 3D inverse models when the horizontal distance becomes small. The sensitivity of this array to the horizontal change in resistivity is increased when the distance between the structures is increased. In the 3D inverse models, Dipole-Dipole array generated a distorted image of the structures when the horizontal distance between the structures is small, while it provides reasonable images when the distance between the structures is increased. So, for investigating a subsurface horizontal structure that is separated with small distances, 2D tomography technique is a better approach than 3D tomography technique when using Dipole-Dipole array.

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Published

30-06-2026

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Vol 45 No 2 (2026): June 2026

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