Array laterolog tool techniques

A method for obtaining information indicative of a formation resistivity, comprising:

• lowering a well tool in a borehole, the well tool comprising an array of electrodes located on the well tool, the array of electrodes including at least one excitation electrode and a number of monitor electrodes that include a number of pairs of monitor electrodes;
• coupling an electrical excitation from the well tool in the borehole to a geologic formation through which the borehole extends, the electrical excitation coupled through the at least one excitation electrode on the well tool selected according to one of a number of excitation modes that defines at least one of a current waveform and a frequency of the electrical excitation;
• receiving from the geologic formation induced voltages resulting from the electrical excitation using the number of monitor electrodes selected according to one of the number of excitation modes;
• estimating a voltage difference between a first pair of monitor electrodes in a first excitation mode of the number of excitation modes at least in part through use of at least one of an induced voltage received through a different monitor electrode from the first pair of monitor electrodes and a voltage difference associated with the first pair of monitor electrodes which is received in a second excitation mode of the number of excitation modes;
• and
• determining the formation resistivity using the estimated voltage difference.