SINGLE SWITCHING METHOD OF ELIMINATING THE EFFECT OF ELECTROMAGNETIC COUPLING BETWEEN A PAIR OF RECEIVERS

摘要

The invention is directed toward the elimination of the effects of electromagnetic coupling between pairs of receivers. The preferred embodiment encompasses the measurement of resistivity and other electromagnetic properties of earth formation in a borehole environment. The invention also incorporates techniques for eliminating the effects of receiver antenna drift and the effects of power variations of two or more transmitters.