GEOELECTRIC SURVEY METHOD AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC G01V3/12 

FIELD: physics.

SUBSTANCE: variable-frequency electromagnetic field is emitted by an electromagnetic field generator having a frame which is alternately placed vertically and horizontally. The electromagnetic field is received by an electromagnetic field receiver having a frame which is alternately placed vertically and horizontally. Values of the apparent resistance of the geologic environment are found based on the measured complex spectra of a signal which characterises intensity of the component of the received electromagnetic field for all frequencies used. The nature of the change in the apparent resistance of the environment along the profile and on the depth of frequency sections is determined and geophysical interpretation thereof is performed. The apparatus has an electromagnetic field generator and receiver. The electromagnetic field receiver includes a controlled frequency synthesiser, an intermediate frequency amplifier and a computer.

EFFECT: high accuracy, reliability and information value of measurements of apparent resistance of the environment and interpretation results thereof.

4 cl, 1 dwg