GEOELECTRIC SURVEY METHOD Russian patent published in 2015 - IPC G01V3/08 

FIELD: physics; geophysics.

SUBSTANCE: invention relates to electrical survey by induction profiling and can be used when studying the structure of the top part of a geological section during search-mapping geoelectric survey. The method comprises using an electromagnetic field sensor and a receiving magnetic sensor aligned with the axis thereof, mounted such that in the detected signal, the contributions of the primary field of the source and the normal secondary field excited in the geoelectric section under investigation are close to zero, and the measured component of the magnetic field characterises an anomalous effect in the secondary field from the investigated inhomogeneity of the section. Profiling is carried out via horizontal shift relative to the Earth's surface of the electromagnetic field source and the receiving magnetic sensor mounted on the axis of a transmitter loop along a profile parallel to the axis of the sensor and passing across the range of the presumed conducting geologic formations with continuous or discrete detection of the anomalous component of the magnetic field. The presence and location of the geoelectric inhomogeneity is determined from the distribution thereof.

EFFECT: high information content and noise-immunity of measurements, reduced labour input of electrical survey.

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