Near Surface Resistivity Responses To Lithostratigraphy And Fluid Contents

Resistivity variation is an important physical property to investigate near surface structures such as<br>salt water intrusion, sinkholes, cavities, as well as active faults. The electrical property of the rocks is severely<br>affected by pore connectivity and fluid type, thus their subsurface variation can be an indicator of the<br>subsurface geology and its fluids. Shallow fractures, faults, and unconformities are expected to have low<br>resistivity as they normally behave as conduits for ground water flow. However when those fractures and<br>faults were filled with resistive fluid (such as liquid hydrocarbon and gas), it should reads a high resistivity.