数字模拟研究声波检测和成像方法的鱼顶在下洞环境中的数值模拟研究
Zhongzhi Hu1, Dingrui Yang2, Wenxing Wu2
1School of Mechanical Engineering, Sichuan University of Science & Engineering, Zigong, 644002, Yibin Province, People's Republic of China. zhongzhi-hu@suse.edu.cn.
Scientific reports
|December 30, 2025
概括
本研究介绍了一种声学成像方法,用于在深井中定位破碎的钻井工具. 线阵扫描技术成功地成像了鱼顶,通过更少的传感器提高了捕捞效率.
科学领域:
- 石油工程是石油工程中的一个.
- 声学 声学 在声学方面
- 地理学井的记录记录时间
背景情况:
- 在深井和超深井中捕捞和对接破碎的钻井工具,由于精确定位的困难,造成了重大挑战.
- 现有的方法通常在复杂的深孔环境中效率和准确性较低.
研究的目的:
- 开发和验证一种新的声学成像方法,用于准确地定位破碎的钻头工具 (鱼) 的顶部.
- 提高在具有挑战性的井口条件下渔业操作的效率和成功率.
主要方法:
- 采用线阵扫描方法,使用声传感器生成鱼顶图像.
- 建立了一个基于钻井声学理论的鱼环空间模型.
- 分析了声波传播,一维线性阵列接收属性和反射回声.
主要成果:
- 声学成像成功地在水平和倾斜的井段中识别了鱼顶.
- 在水平截面中,鱼顶中心的错误率为2%,证明了高精度.
- 该方法揭示了鱼在倾斜部分的倾斜方向.
结论:
- 直线阵列声学成像方法为定位破碎的钻头工具提供了有效的解决方案.
- 通过减少数量的声传感器成功实现成像,提高了操作效率.
- 为开发先进的下洞工具和系统提供了宝贵的参考.
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01:15Sampling Theorem
In signal processing, the analysis of continuous-time signals, denoted as x(t), often involves sampling techniques to convert these signals into discrete-time signals. This process is essential for digital representation and manipulation. A critical component in sampling is the train of impulses, characterized by the sampling interval and the sampling frequency. The relationship between these parameters and the original signal's properties dictates the success of the sampling process.
01:18Aliasing
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...