Dynamic liquid level tracking monitoring method and system in complex shaft environment and electronic equipment

By emitting and processing sound wave signals in a complex wellbore environment, extracting and correcting downhole sound velocity and liquid level echo signals, the problem of inaccurate liquid level depth calculation in the prior art is solved, and accurate monitoring of downhole liquid level depth and effective identification of overflow risk is achieved.

CN119712067APending Publication Date: 2025-03-28CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202411734921.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to accurately monitor the downhole sound velocity and echo characteristics in complex wellbore environments, resulting in inaccurate calculation of liquid level depth and the inability to effectively identify the risk of downhole spills.

Method used

By transmitting acoustic wave signals to the drilling wellbore, receiving and denoising the first echo signal, extracting the coupling echo signal and liquid level echo signal, and determining the change law of the downhole sound speed with the depth of the wellbore based on the conversion relationship between sound waves and thermodynamics, the liquid level depth is accurately calculated.

Benefits of technology

It realizes accurate calculation of the depth of the underground fluid level in complex wellbore environments, improves the ability to identify the risk of downhole spills, and ensures accurate monitoring of dynamic changes in the working fluid volume of the wellbore.

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Abstract

The invention relates to the technical field of oil-gas exploration, and discloses a dynamic liquid level tracking monitoring method and system in a complex shaft environment and electronic equipment. The method comprises the steps of transmitting a sound wave signal to a drilling shaft, and receiving a first echo signal reflected by the shaft; performing de-noising processing on the first echo signal to obtain a de-noised second echo signal; respectively extracting a first coupling echo signal and a liquid level echo signal from the second echo signal; based on the first coupling echo signal and the second echo signal of the shallow well section and the conversion relation between sound waves and thermodynamics, the change rule of the underground sound velocity along with the depth of a shaft is determined, and a second coupling echo signal after sound velocity compensation is obtained; and the liquid level depth is determined according to the second coupling echo signal and the liquid level echo signal. According to the invention, the real-time monitoring and calculation precision of the annulus liquid level can be effectively improved, the requirements of measurement and sound wave signal processing under various complex wellbore conditions are met, and adaptive calculation can be carried out in a data driving mode when the underground environment changes.
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