Detection of three-dimensional conductive or resistive anomalous bodies using resistivity profiling method
Resistivity methods, with some limitations and field difficulties, are still considered among the most important geophysical techniques. Remarkable advantages such as simple and inexpensive instruments, and also less complicated theory and interpretation of these methods compared to electromagnetic methods, popularity of these methods, in many cases, even have been increased. Although the detectability of the methods is relatively low, the resistivity profiling method can be used for the detection and exploration of conductive or resistive anomalies (such as mineral deposits or subsurface contaminated zones having different resistivities from their surrounding rocks). For such geoelectrical situations (i.e. anomalous bodies in a layered earth or host rock), using suitable mathematical algorithms, numerical modeling of resistivity data, obtained with the resistivity profiling method, are carried out, and thus, the correct results are known ahead of the application of the method In this paper, resistivity responses of a layered earth containing three-dimensional conductive or resistive anomalous bodies are obtained using a suitable forward modeling technique, and then, the resistivity data are investigated for the detection and exploration of the anomalous bodies.