Combined resistivity measurement system and method for measuring resistivity by using combined resistivity measurement system

Abstract

The invention relates to a combined resistivity measurement system and a method for measuring resistivity by using the combined resistivity measurement system. The combined resistivity measurement system comprises a probe measurement module, a resistance measurement module, a temperature measurement module, a resistivity calculation module and a liquid accommodating tank; the probe measurement module includes four electrode and a temperature sensitive resistor, wherein the outer electrodes are current electrodes, and the inner electrodes are voltage electrodes; the probe measurement module is inserted into the liquid accommodating tank; the resistance measurement module, the probe measurement module and liquid accommodated in the liquid accommodating tank form a closed loop; and the temperature measurement module and the temperature sensitive resistor are connected with each other so as to form a closed loop. The measurement system provided by the invention has multiple functions of temperature measuring, resistance measuring and resistivity calculation. With the measurement system adopted, the size of the resistivity measurement system can be effectively reduced, and the portability of instruments can be improved; and resistivity measurement and temperature measurements are combined together, so that measurement precision can be ensured.

Description

technical field [0001] The invention relates to the technical field of resistivity measurement systems, in particular to a combined resistivity measurement system and a method for measuring resistivity using it. Background technique [0002] Mud resistivity is an important parameter in well logging interpretation, but the existing mud resistivity testers are all bulky ground test instruments, which are inconvenient to measure and cannot meet the needs of the field where well conditions are becoming more and more complex. There are many preparations before the test and high wiring requirements, which bring a heavy burden to the testers. At the same time, the mud insulation performance is poor, and the temperature has a great influence on the measurement results of the resistivity. The traditional mud resistivity measurement system cannot detect the temperature while detecting the resistance, so the measurement results of the resistivity are not accurate enough. For the resis...

AI Technical Summary

Problems solved by technology

[0002] Mud resistivity is an important parameter in well logging interpretation, and the existing mud resistivity testers are all bulky ground test instruments, which are inconvenient to measure and cannot meet the needs of the field where well conditions are becoming more and more complex

More preparatory work and higher wiring requirements before the test bring a heavy burden to the testers

At the same time, the mud insulation performance is poor, and the temperature has a great influence on the measurement results of the resistivity. The traditional mud resistivity measurement system cannot detect the temperature while detecting the resistance, so the measurement results of the resistivity are not accurate enough.

For the resistance measuring instrument with temperature measurement function, the accuracy of temperature measurement cannot be fully guaranteed, which will have an adverse effect on the resistivity measurement results

[0003] The existing mud resistivity tester adopts a box structure, and the internal circuit part occupies a large space, and needs to occupy a special storage space; at the same time, it does not have the function of temperature measurement, thus limiting the scope of use of the instrument

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