Hard electrode combined logging instrument for logging drill well

Abstract

The invention provides a hard electrode combined logging instrument for logging a drill well. The logging instrument comprises a current-return electrode, an emission electrode and an electronic circuit; the logging instrument is capable of realizing one-time well descending, thus being capable of performing the measurement on data of an electrode system; the electronic circuit comprises a power supply circuit, a measurement amplification circuit, a scale circuit, a power control circuit and a communication interface circuit. The logging instrument provided by the invention has the beneficial effect of being capable of measuring a conventional curve required by a user, and also measuring a potential curve and a gradient curve simultaneously by one-time well descending under the control of a telemetry instrument.

Description

Technical field: [0001] The invention belongs to the field of well logging instruments, in particular to a hard electrode combined well logging instrument for measuring drilling. Background technique: [0002] At present, customers request to provide electrode system data during domestic well logging. For this reason, the oilfield logging team must complete the electrode system logging in a single trip in addition to the Grand Slam conventional logging. This not only increases the logging risk, And lead to lengthening when occupying the well, greatly increasing the expense cost of the drilling company. [0003] Common resistivity logging methods are often used in the prior art, and the measurement principle can be found in the appendix figure 1 , in order to measure the resistance R of a certain resistance, a power supply can be used to supply power to the resistance, and the current I flowing through the resistance and the voltage drop V across the resistance can be measur...

AI Technical Summary

Problems solved by technology

[0002] At present, customers request to provide electrode system data during domestic well logging. For this reason, the oilfield logging team must complete the electrode system logging in a single trip in addition to the Grand Slam conventional logging. This not only increases the logging risk, Moreover, it leads to a longer occupation of the well, which greatly increases the cost of the drilling company.

Images