Theoretical Model for 2D Resistivity Mapping with Enhancing Horizontal Resolution (EHR) Technique

 

M.M. Nordiana

Postgradute Student, Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia
e-mail: mmnordiana@gmail.com

Dr. Rosli Saad

Senior Lecturer, Geophysics Section, School of Physics, 11800 Universiti Sains Malaysia, Penang, Malaysia
e-mail: e-mail:rosli@usm.my

 

ABSTRACT

A theoretical model of 2D resistivity was done in order to enhance the horizontal resolution (EHR) technique. This paper reviews the theoretical aspects of 2D resistivity method to define target with the intent of defining conditions where the EHR technique can be expected to produce useful results and the limitations of 2D resistivity measurements without EHR technique. One anomalous of block will generate in RES2DMOD software at specific distance and depth using Wenner, Wenner Schlumberger and Pole dipole arrays. In order to see the effectiveness of EHR technique, 41 electrodes were used with 0.10 m electrode separations: without EHR technique and with EHR technique. The medium was created with two different layers of 1 ohm-m and 10 ohm-m with the embedded anomalous body of 500 ohm-m. To evaluate the performance of proposed technique, a comparison study is include here with results obtain from a conventional 2D resistivity inversion technique based on a least square algorithm, available in the RES2DINV software. The proposed technique when executed appears to be computationally efficient.

Keywords: Theoretical model, 2D resistivity, Enhancing Horizontal Resolution (EHR), Wenner, Wenner Schlumberger, Pole-dipole

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