1. A method of estimating a property of an earth formation penetrated by a borehole, the method comprising: conveying a carrier through the borehole; performing a plurality of electrical measurements on the formation using a sensor disposed at the carrier and having a plurality of electrodes disposed in a concentric arrangement wherein a standoff distance between the sensor and a wall of the borehole has an influence on each electrical measurement in the plurality of electrical measurements; determining an impedance for each electrical measurement in the plurality of electrical measurements; inputting each determined impedance into an artificial neural network implemented by a processor; and outputting the property from the artificial neural network wherein the outputted property compensates for the influence of sensor standoff distance on each electrical measurement in the plurality of electrical measurements.