FORMATION IMAGING IN DRILLING IN NONCONDUCTIVE LIQUIDS

摘要

FIELD: oil and gas production. ^ SUBSTANCE: device comprises a case designed to be integrated in a well-logging system in drilling, a resistivity transducer attached to the case. The resistivity transducer comprises a measuring pad which supports a current injector electrode, a current return electrode and a pickup electrode array. The pickup electrode array is provided between the current injector electrode and the current return electrode. The measuring pad comprises a conductive link with a potential equal to that of a bore wall. The transducer is equipped on the case so that it does not contact with the bore wall when the case presses itself thereto. Besides the device accommodates circuits of current feed from the current injector electrode and for potential measurement between the electrodes within the pickup electrode array. ^ EFFECT: enabled well-logging operations in drilling with using a nonconductive drilling agent with reducing current injection electrode disturbance and applying relatively high frequencies and reducing the influence of unequal gaps. ^ 23 cl, 13 dwg