Investigation of Fault Properties Using Electrical Resistivity Imaging

Abstract

Forward modeling of Electrical Resistivity Imaging was performed to define the limits present in the algorithms and grids. An analysis was completed of these limits by forward modeling 44 models with the Halihan-Fenstemaker method of acquisition and processing. Twenty four forward models were also run with other arrays and standard processing techniques. Field data was acquired at three field sites in the Arbuckle-Simpson study area. The first site was a saturated fault without water flow at the surface. The second site was a saturated fault with spring flow at the surface. The third site was an unsaturated fault, exposed, and had no water flow. These were examined to determine if resistivity can identify faults that are conduits to flow or barriers to flow.