Electrode for measuring formation resistivity

Abstract

The embodiment of the invention relates to an electrode for measuring formation resistivity, which belongs to the technical field of seismic exploration. The electrode comprises a main electrode, supervising electrodes and shielding electrodes, wherein the main electrode consists of one circular electrode and a plurality of azimuth electrodes; the plurality of azimuth electrodes are continuously arranged along the circumference of the circular electrode; and one pair of supervising electrodes for detecting whether the main electrode and the shielding electrodes on the two sides are equipotential or not is arranged on each of two axial sides of the circular electrode. The structure of the electrode shows that no supervising electrode is arranged in the main electrode of the embodiment, namely no complicated monitoring circuits, so the electrode for measuring the formation resistivity avoids interference efficiently in work. The electrode has no complicated monitoring circuits in the main electrode, effectively avoids interference in work, has a simple structure and accurate resistivity measured practically and is favaroable for popularization and use.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of formation exploration, and in particular to an electrode for measuring formation resistivity. Background technique [0002] In the field of formation exploration, it is inevitable to measure the formation resistivity, and the accuracy of the measurement of the resistivity directly affects the oil and gas judgment of the measured formation. In the prior art, an electrode system is usually used as an electrode for measuring formation resistivity, which includes a main electrode, a monitoring electrode and a shielding electrode, so this electrode can realize three-dimensional resistivity measurement, that is, not only the resistance of the well wall can be realized It can also realize radial resistivity imaging. [0003] However, since the monitoring electrodes are arranged around the azimuth electrode on the main electrode in the electrodes for measuring the formation resistivity in t...

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Problems solved by technology

[0003] However, since the monitoring electrodes are arranged around the azimuth electrode on the main electrode in the electrodes for measuring the formation resistivity in the prior art, the monitoring circuit in the main electrode is complicated, and the electrodes are easily disturbed when the electrodes are working. The actual measured The resistivity is not accurate, which is not conducive to the popularization and utilization of this electrode series products

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