DIELECTRIC LOGGING METHOD OF NEAR-WELLBORE Russian patent published in 2020 - IPC E21B47/12 G01V3/30 

FIELD: measurement.

SUBSTANCE: invention relates to near-wellbore geophysical exploration means, particularly to methods of electromagnetic logging of near-wellbore. Method, in which downhole part consisting of optic-electric converter arranged along one axis is moved on logging cable inside well, downhole emitter and remote at two fixed distances from said emitter of upper and lower downhole receivers; when well part is moved by well emitter, harmonic radio signals are emitted in near-wellbore space at several frequencies, selected from frequency range from 1 to 50 MHz in accordance with emission program, received by downhole radiator from ground part, consisting of retransmitter and computation module and connected to borehole part by means of logging cable, recording values of current amplitude and complex resistance at the input of the radiator antenna during each radiation of the radio signal, these values are transmitted in digital form to the ground part; receive the radio signals transmitted through rocks in near-wellbore on each receiver, wherein when each radio signal is received, values of the axial component of the electric field of the received radio signal and the phase difference of the measured field between the antennae of the receivers are recorded, said values are transmitted in digital form to the ground part; method includes calculating, on a computer module, a ground portion of electrical resistance and dielectric permeability of rocks lying in a near-wellbore space based on values recorded by the emitter and receivers.

EFFECT: technical result is higher accuracy of determining information parameters characterizing rocks lying in near-wellbore space.

7 cl, 4 dwg