FIELD: electromagnetic methods of geophysical investigations. SUBSTANCE: electromagnetic field is excited in the ground with the aid of supply line and nonsteady-state field is measured by means of several reception frames located at different distances from supply line. Obtained results are integrated by spacing for each fixed time of registration. Then range of spacing is increased and integral value of field is found again for each range and geoelectric parameters are determined under such range of spacing at which value of integral field refers to asymptotic value. EFFECT: increased accuracy of prospecting.
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