曲博文,谭宝海,张凯,等. 自适应声波测井换能器激励电路设计[J]. 石油钻探技术,2024,52(0):1-7. DOI: 10.11911/syztjs.2024077
引用本文: 曲博文,谭宝海,张凯,等. 自适应声波测井换能器激励电路设计[J]. 石油钻探技术,2024,52(0):1-7. DOI: 10.11911/syztjs.2024077
Qu Bowen, Tan Baohai, Zhang Kai, et al. Design of excitation circuit of adaptive acoustic logging transducer[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024077
Citation: Qu Bowen, Tan Baohai, Zhang Kai, et al. Design of excitation circuit of adaptive acoustic logging transducer[J]. Petroleum Drilling Techniques, 2024, 52(0):1-7. DOI: 10.11911/syztjs.2024077

自适应声波测井换能器激励电路设计

Design of excitation circuit of adaptive acoustic logging transducer

  • 摘要: 随着对声波测井仪器探测距离和探测精度要求的不断提高,传统的脉冲方波激励方式已难以满足低频激励等现场需求。因此,设计了一种基于推挽功率放大技术的正弦波宽频激励电路,以实现对换能器激励频率的精确调节,并设计了信号放大和整流电路以优化正弦激励信号。此外,针对声波测井仪器在井下作业时受到环境如温度和压力的影响,还设计了基于PID控制的功率自适应调整电路,以保持激励能量的恒定。试验结果表明,所设计的激励电路能够实现宽频带、高功率和自适应的正弦波激励,将其应用于井下仪器可显著提高激励性能,增加声波远探测测井仪器的探测距离和分辨率,进而促进油气田的勘探与开发。

     

    Abstract: The requirements of acoustic logging on the detection distance and detection accuracy of the instrument are constantly improving. The traditional pulse square wave excitation method only excites the acoustic energy near the resonant frequency of the transducer, which is difficult to meet the field needs such as low-frequency excitation. This paper designs a sine wave wide frequency excitation circuit based on push-pull power amplification technology to achieve accurate adjustment of the transducer excitation frequency, and designs a signal amplification and rectification circuit to optimize the sine excitation signal. In addition, the performance of the excitation circuit is seriously affected by the environment such as temperature and pressure during the downhole operation of acoustic logging tools. In order to keep the excitation energy constant, this paper designs a power adaptive adjustment technology based on PID control. The experimental results show that the excitation circuit can realize wide frequency high-power and adaptive sine wave excitation. Applying this circuit to downhole instruments can significantly improve the excitation performance, improve the detection distance and resolution of instruments, and promote the exploration and development of oil and gas fields.

     

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