Main Frequency Band and the Reflected Sound Field in the Depth Detection of Borehole Wall Based on Microscope Technology
发布时间：2024-01-19
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名 称
Main Frequency Band and the Reflected Sound Field in the Depth Detection of Borehole Wall Based on Microscope Technology
科技资源标识
CSTR:11738.14.NCDC.XDA14.PP6317.2024
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摘 要
The traditional microscope technology has the limitation of short detection distance. In order to solve this problem, a reflective near-field optical microscope based on plasma pulse source is proposed. Firstly, based on the basic theory of the plasma pulse sound source in the well, the influence of the drill collar on the radiated sound field inside and outside the well is studied, and the excitation frequency range of the plasma pulse sound source in the process of drilling is determined. Secondly, the finite element method is used to simulate the reflection wave received by the plasma pulse source when there are reflection surfaces inside and outside the well during the drilling process under the reflective near-field optical microscope. On this basis, the best source distance and source excitation frequency of reflection near-field optical microscope are determined. Finally, through the comparison of open hole wells, it is determined that the excitation frequency of the sound source should be in the range of 2-3khz.
Jing Zhou Lijuan Wang Jie Niu. Main Frequency Band and the Reflected Sound Field in the Depth Detection of Borehole Wall Based on Microscope Technology. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP6317.2024.
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CSTR:11738.14.NCDC.XDA14.PP6317.2024