FIELD: physics; measuring.
SUBSTANCE: device of the tool for well logging transiting through an underground formation, is intended to realisation of measurings in a surrounding medium round the chink. The device contains the extended spending rod having a long axis, the antenna sondes located round a rod and including the transmitter for transmission of electromagnetic energy in a formation and the case located round antenna sondes. The plug has the outside surface located for exhibiting for a surrounding medium round a chink and an interior surface, located radially inside from an outside surface. Besides, the device contains the first gang of electrodes and the second gang of electrodes. Each electrode has the outside extremity and the interior extremity located radially inside from the outside extremity. Besides, the first and second gangs of electrodes are separated from each other by some distance in a dilatational direction. Current contours include the first spending trajectory, between a spending surrounding medium round a chink, one of the first gang of electrodes and a rod, and the second spending trajectory, between a spending surrounding medium round the chink, an electrode from the second gang of electrodes and a rod.
EFFECT: increase of measurement accuracy of a signal in the chink.
22 cl, 11 dwg
