[1]孙志峰,唐晓明,苏远大,等.随钻多极子声波测井仪接收换能器的数值模拟[J].测井技术,2019,43(02):118-121128.[doi:10.16489/j.issn.1004-1338.2019.02.002]
 SUN Zhifeng,TANG Xiaoming,SU Yuanda,et al.Numerical Simulation of Transducer of LWD Multipole Acoustic Logging Tool[J].WELL LOGGING TECHNOLOGY,2019,43(02):118-121128.[doi:10.16489/j.issn.1004-1338.2019.02.002]
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随钻多极子声波测井仪接收换能器的数值模拟()
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《测井技术》[ISSN:1004-1338/CN:61-1223/TE]

卷:
第43卷
期数:
2019年02期
页码:
118-121128
栏目:
方法研究
出版日期:
2019-06-20

文章信息/Info

Title:
Numerical Simulation of Transducer of LWD Multipole Acoustic Logging Tool
文章编号:
1004-1338(2019)02-0118-05
作者:
孙志峰12 唐晓明1 苏远大1 刘西恩2 仇傲2 张勇2
(1.中国石油大学(华东)地球科学与技术学院, 山东 青岛 266580; 2.中海油田服务股份 有限公司, 北京 101149)
Author(s):
SUN Zhifeng12 TANG Xiaoming1 SU Yuanda1 LIU Xien2 QIU Ao2 ZHANG Yong2
(1. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China; 2. China Oilfield Services Limited, Beijing 101149, China)
关键词:
声波测井仪 接收换能器 边界条件 基片厚度 封装方式 接收灵敏度 有限 元
Keywords:
acoustic logging tool transducer boundary condition substrate thickness sealing method sensitivity finite element method
分类号:
P631.83
DOI:
10.16489/j.issn.1004-1338.2019.02.002
文献标志码:
A
摘要:
接收换能器是随钻多极声波测井仪的关键器件,其性能直接影响测量信号的质量。 利用有限元法分析了边界条件、金属基片厚度以及封装方式对随钻多极子声波测井仪叠片 型接收换能器振动模态和接收灵敏度的影响。模拟结果表明,两端钳定边界条件下换能器 一阶伸缩振动模态的谐振频率最高,声波测井工作频率范围内接收灵敏度曲线最平缓、起 伏最小,接收灵敏度较高,是随钻多极子声波测井仪最适合的一种机械安装方式。中间金属 基片厚度对接收换能器灵敏度有一定影响,接收灵敏度随着金属基片厚度的增加而略有升 高,且频率为3 kHz附近的灵敏度跳跃点往高频移动、起伏变大。采用充满硅油的长方体壳 体对接收换能器封装,接收灵敏度比无壳体有较大差异,灵敏度曲线在多个频率点存在跳变 ,工作频段内起伏变大。数值模拟结果对随钻多极子声波测井仪接收换能器设计、制作及 正确安装起到良好的指导作用。
Abstract:
As a key part of a LWD multipole acoustic logging tool, the performance of the transducer directly affects the quality of logging data. This study analyzed how boundary conditions, the thickness of metal substrate and sealing method affect the vibration and sensitivity of the laminated transducer of a LWD acoustic logging tool by finite element method. The simulation results show that the clamped boundary at both ends is the most suitable mechanical installation for a LWD acoustic logging tool, because the resonant frequency of the first-order stretching vibration is the highest for the transducer, the sensitivity curve is the smoothest and the least undulating, and the receiving sensitivity is relatively high. It is also found that the thickness of the intermediate metal substrate has a certain effect on the sensitivity of the transducer. The sensitivity rises slightly with the increase of the thickness of the metal substrate, and the sensitivity jump point near 3 kHz moves to high frequency and the fluctuation increases. When a rectangular shell filled with silicone oil is used to seal the transducer, its receiving sensitivity is quite different from that without the shell, the sensitivity curve jumps at several frequency points, and the fluctuation in the working frequency band becomes larger. The results of numerical simulation play a good guiding role in the design, fabrication and installation of the transducer of a LWD multipole acoustic logging tool.

参考文献/References:

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备注/Memo

备注/Memo:
(修改回稿日期: 2018-12-19 本文编辑 余迎)基金项目: “十三五”国家科技重大专项“高精度油气测井技术与装备研发及应用”(2017ZX05019002-006) 作者简介: 孙志峰,男,博士研究生,从事声波测井方法研究。E-mail:sunzhf3@cosl.com.cn
更新日期/Last Update: 2019-06-20