随钻声波测井仪条带型接收换能器的有限元分析  

Finite Element Analysis of Strip-type Receiving Transducer for Acoustic LWD Tool

作　　者：孙志峰[1] 仇傲[1] 罗瑜林[1] 罗博 李杰[1] 刘西恩[1] SUN Zhifeng;QIU Ao;LUO Yulin;LUO Bo;LI Jie;LIU Xi’en(China Oilfield Services Limited, Beijing 101149, China)

机构地区：[1]中海油田服务股份有限公司,北京101149

出　　处：《压电与声光》2022年第3期413-417,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(U21B2064);中国海洋石油集团有限公司科研项目(YJB22YF002)。

摘　　要：条带型接收换能器是随钻声波测井仪的关键器件,其声学性能直接影响测量信号的质量。利用有限元法对条带型接收换能器进行设计分析。结果表明,接收换能器中的压电片采用并联接线方式接收灵敏度较高,在钻铤波隔声阻带内接收灵敏度起伏小于20 dB。在此基础上分析了压电片个数及几何尺寸对换能器接收灵敏度的影响。条带型接收换能器的压电片个数越多,压电片厚度越大,钻铤波隔声阻带范围内接收灵敏度越高,有利于提高地层波信号测量;压电片高度越大,压电片宽度越小,钻铤波通带范围内灵敏度越低,有利于降低钻铤波信号能量。数值模拟结果对随钻声波测井仪条带型接收换能器的设计及制作有良好的指导作用。The strip-type receiving transducer is a key element of the acoustic logging-while-drilling(LWD)tool and its performance directly affects the signal quality.The strip-type receiving transducer is designed and analyzed by the finite element method.The results show that the parallel connection of the receiving crystal has higher receiving sensitivity,and the fluctuation of the receiving sensitivity is less than 20 dB in the insulator stopband of the collar wave.On this basis,the influences of the number of piezoelectric ceramics and geometric size on the receiving sensitivity of the transducer are analyzed.The greater the number of crystals in the strip-type receiving transducer,the greater the thickness of the crystal,the higher the receiving sensitivity within the range of the insulator stopband of the collar wave,which is beneficial to improve the measurement of formation wave signals.The larger the crystal height,the smaller the crystal width,the lower the sensitivity within the range of passband of the collar wave,which is beneficial to reduce the signal energy of the collar wave.The numerical simulation results have a good guidance for the design and fabrication of the strip-type receiving transducer of the acoustic logging-while-drilling tool.

关 键 词：条带型接收换能器 压电片 接收灵敏度 有限元法 随钻声波 

分 类 号：P631.53[天文地球—地质矿产勘探] TN384[天文地球—地质学] TN64[电子电信—物理电子学]