Comparative Study of 2D Resistivity Forward and Inversion Imaging with Different Arrays of High-Density Resistivity Method

The high-density resistivity method is one of the important methods in geophysical exploration, with an early development stage, wide application, and multiple advantages. 2D resistivity imaging technology is widely used in resource exploration, study of geological formations, and solving various geological problems. In this paper, in order to investigate the characteristics and applicability of each array, the ELRIS2D software is used to conduct a comparative study on forward and inverse modeling of Wenner array, dipole-dipole array, and Schlumberger array, which shows the difference between the apparent resistivity of low-resistance double-sphere anomalies and the surrounding medium. Results show that the Wenner array is sensitive to low-resistance anomalies and tends to mask the details of adjacent anomalies resulting in low lateral resolution. The dipole-dipole array has strong lateral resolution for apparent resistivity, which can be used to identify faults, mineral veins, and other lateral anomalies. The Schlumberger array and the dipole-dipole array are more suitable for the detection of adjacent anomalies. This study is of great significance for the array selection, joint inversion and comprehensive interpretation in the practical electrical prospecting.