Patent ID: 8841914

Claim:
A method of approximating or determining at least one dimension of at least one underground geological feature of an earthen formation using electrolocation, the at least one geological feature being at least partially located within a zone of interest in the earthen formation proximate to a subterranean well bore, the method comprising: while the well bore and geological feature at least partially contain conductive fluid, generating an electric field in the zone of interest, at least one target object in the zone of interest having an electrical impedance that differs from the electrical impedance of the conductive fluid and creating perturbations in the electric field, providing at least two sensing electrodes in the well bore, the sensing electrodes being configured to detect differences therebetween in electric potential caused by the at least one target object, at multiple different times and multiple different locations in the well bore, the sensing electrodes detecting differences therebetween in electric potential caused by at least one target object and providing data relating thereto to at least one data processing system; and the at least one data processing system approximating or determining at least one dimension of at least one geological feature in the earthen formation based at least partially upon data provided by the sensing electrodes.