RESISTIVITY IMAGING USING COMBINATION CAPACITIVE AND INDUCTIVE SENSORS

A system for measuring electric characteristics of an earth formation includes a carrier configured to be disposed in an earth formation, and an inductive measurement assembly including an antenna configured to generate an oscillating magnetic field in the earth formation and measure a resistivity of the formation by detecting a signal in response to currents induced in the formation. The system also includes a capacitive measurement assembly including a capacitive measurement electrode configured to detect a signal in response to a measurement current injected into the formation, the capacitive measurement electrode disposed between the antenna and the formation and in a path of the magnetic field, the capacitive measurement electrode formed from a plurality of constituent electrodes that are electrically isolated from each other so as to prevent induction of eddy currents across the plurality of electrodes.