[1]孫志峰,唐曉明,蘇遠大,等.隨鉆多極子聲波測井儀接收換能器的數值模擬[J].測井技術,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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隨鉆多極子聲波測井儀接收換能器的數值模擬()
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《測井技術》[ISSN:1004-1338/CN:61-1223/TE]

卷:
第43卷
期數:
2019年02期
頁碼:
118-121128
欄目:
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
文章編號:
1004-1338(2019)02-0118-05
作者:
孫志峰12 唐曉明1 蘇遠大1 劉西恩2 仇傲2 張勇2
(1.中國石油大學(華東)地球科學與技術學院, 山東 青島 266580; 2.中海油田服務股份 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)
關鍵詞:
聲波測井儀 接收換能器 邊界條件 基片厚度 封裝方式 接收靈敏度 有限 元
Keywords:
acoustic logging tool transducer boundary condition substrate thickness sealing method sensitivity finite element method
分類號:
P631.83
DOI:
10.16489/j.issn.1004-1338.2019.02.002
文獻標志碼:
A
摘要:
接收換能器是隨鉆多極聲波測井儀的關鍵器件,其性能直接影響測量信號的質量。 利用有限元法分析了邊界條件、金屬基片厚度以及封裝方式對隨鉆多極子聲波測井儀疊片 型接收換能器振動模態和接收靈敏度的影響。模擬結果表明,兩端鉗定邊界條件下換能器 一階伸縮振動模態的諧振頻率最高,聲波測井工作頻率范圍內接收靈敏度曲線最平緩、起 伏最小,接收靈敏度較高,是隨鉆多極子聲波測井儀最適合的一種機械安裝方式。中間金屬 基片厚度對接收換能器靈敏度有一定影響,接收靈敏度隨著金屬基片厚度的增加而略有升 高,且頻率為3 kHz附近的靈敏度跳躍點往高頻移動、起伏變大。采用充滿硅油的長方體殼 體對接收換能器封裝,接收靈敏度比無殼體有較大差異,靈敏度曲線在多個頻率點存在跳變 ,工作頻段內起伏變大。數值模擬結果對隨鉆多極子聲波測井儀接收換能器設計、制作及 正確安裝起到良好的指導作用。
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.

參考文獻/References:

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備注/Memo

備注/Memo:
(修改回稿日期: 2018-12-19 本文編輯 余迎)基金項目: “十三五”國家科技重大專項“高精度油氣測井技術與裝備研發及應用”(2017ZX05019002-006) 作者簡介: 孫志峰,男,博士研究生,從事聲波測井方法研究。E-mail:[email protected]
更新日期/Last Update: 2019-06-20
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