RANGING BY MEANS OF CURRENT PROFILING Russian patent published in 2017 - IPC E21B47/228 E21B7/04 G01V3/38 

FIELD: mining.

SUBSTANCE: method for determining the distance between the wells, comprising: generating a voltage profile taking into account the excitation current measured by the selected electrodes from a plurality of electrodes disposed along the first well pipe; generating an impedance profile taking into account the location along the noted first well using selected electrodes from a plurality of electrodes; generating a current profile using a voltage profile and an impedance profile; and performing a step of determining the distance to the noted first well relative to the second well using the current profile and the measured magnetic field.

EFFECT: increased accuracy of determining the distance between the wellbores of proximal wells.

39 cl, 11 dwg