Modularized through-drill string three-parameter logging method and system

By using a modularly designed three-parameter logging method through the drill string, the tension and mud resistivity of the downhole instrument string can be monitored in real time. This solves the logging problem under high temperature and high pressure conditions, achieves efficient and accurate logging data acquisition and storage, reduces maintenance costs, and is suitable for special well types.

CN122257789APending Publication Date: 2026-06-23CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202411903535.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies are difficult to perform effective three-parameter logging in high-temperature and high-pressure environments, and their modular design and lack of interchangeability result in long maintenance times and high costs for logging instruments.

Method used

A modular three-parameter logging method is adopted, which uses modular circuit design to monitor the tension and mud resistivity of the downhole instrument string in real time. High-temperature and high-pressure resistant sensors and memory are used to realize continuous measurement and data storage of well temperature, tension and mud resistivity.

Benefits of technology

It improves the continuity and accuracy of logging operations, reduces maintenance time and costs, enhances the reliability and adaptability of instruments, is suitable for harsh environments such as high pressure and high temperature, adapts to special well types, and ensures the integrity and security of data.

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Abstract

The application discloses a modularized through-drilling tool three-parameter logging method and system, and the method comprises the following steps: acquiring tension sensor output signals, temperature sensor output signals, resistivity sensor output signals and instrument power supply in the cable logging mode or the storage logging mode; pre-processing the acquired tension sensor output signals, temperature sensor output signals, resistivity sensor output signals and instrument power supply; and calculating the pre-processed tension sensor output signals, temperature sensor output signals, resistivity sensor output signals and instrument power supply to obtain well temperature, tension and mud resistivity logging curves. The system comprises a data acquisition module, a data preprocessing module and a calculation module. The application can obtain the measurement data of tension, temperature and mud resistivity in real time, and provides important technical parameters for the safety of logging instruments and the interpretation and processing of logging data.
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Citation Information

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