FIELD: running well survey, particularly to control fluid flow during oil production from the well by controllable injection of tracer isotopes.
SUBSTANCE: system has device arranged around part of tube well structure, which prevents passage of time-changing electric signal transmitted through above tube structure part. System also has downhole electrically controlled device to inject tracer isotopes, which is permitted to eject tracer isotope material into above well due to electrical connection thereof with tube structure and due to supply of time-changing electric signal to it. Well structures for hydrocarbon production and methods of above wells operation are also disclosed.
EFFECT: increased oil output from reservoir and increased oil production control responsiveness.
33 cl, 41 dwg, 2 tbl
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