Some issues of electrical prospecting technology using low-frequency alternating current

Abstract

In the pre-war years, in the laboratories of the Department of Geophysical Exploration Methods of LOLGI, the development of new methods and new techniques for electrical prospecting using low and high frequency currents was carried out. A number of new electrical prospecting methods have been developed: a method for measuring anomalous fields at high frequencies, a method for measuring fields out of phase with the generator field, electrical profiling on alternating current with compensation for the normal field, etc. All of them are based on measuring only anomalous parts of the field, which leads to greater sensitivity of the methods and their extraordinary portability. At the same time, the technology and methodology of already existing electrical prospecting methods were developed and, for example, for the intensity method, equipment was designed that makes this modernized method completely different from the old method. Below are some results of some of the extensive work carried out (see article).