测井技术2018，Vol.42Issue(6)：629-633,5.DOI:10.16489/j.issn.1004-1338.2018.06.004
随钻声波测井的正弦脉冲激励方法和实验研究
Sine-wave Pulse Excitation Circuit Method and Experiment Study for LWD Acoustic Logging
摘要
Abstract
Multipole LWD acoustic logging are affected seriously by direct waves along the drill collar.In order to obtain high SNR data, it is an effective method to control the frequency of excitation sources into the attenuation domains of the isolator.However, the traditional single pulse signals cannot meet the above demands for their broad frequencies and resonance working status.Therefore, this paper designs a gate sine-wave pulse excitation circuit based on push-pull power amplification structure to solve this problem.The circuit consists of an excitation controller, a signal generator, a detector, apower amplifier, apulse transformer and a power storage circuit.Through experimental research, the frequency, phase and bandwidth of the sound source of the same transducer are all adjustable, which realizes the multi-pole mode emission and obtains the reference basis for the design of the number of sound source cycles.关键词
随钻声波测井/声源激励/推挽式功率放大/频率/带宽Key words
LWD acoustic logging/transducer excitation/push-pull power amplifier/frequency/bandwidth分类
天文与地球科学引用本文复制引用
谭宝海,唐晓明,张凯..随钻声波测井的正弦脉冲激励方法和实验研究[J].测井技术,2018,42(6):629-633,5.基金项目
国家自然科学基金面上项目"随钻声波测井双源反激隔声方法及实验研究" (41774138) （41774138）
国家自然科学基金青年基金项目"基于反褶积最优化设计的双源反激过套管声波测井理论和方法研究" (41804121) （41804121）
