FIELD: mining.
SUBSTANCE: invention relates to electric coring of geological survey of cased wells and can be used to determine resistance of adjacent strata in outer annulus of wells. Electromagnetic field in surrounding medium is excited by a pulsed current simultaneously in two coaxial generator inductive coils with different counter-points moving along the investigated well. According to value of energy-dispersive spectrometer of axial decay of magnetic induction component, measured by means of a measuring coil and located between the generator coils, determine the value of specific electrical resistance of adjacent strata.
EFFECT: increasing accuracy of medium resistance in outer annulus space of cased wells in geophysical researches.
1 cl, 4 dwg
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