随钻钻孔深度的声学测量技术实验研究  

Experimental Study on Acoustic Measurement Technique of Drilling Depth

作　　者：仇海生[1,2] 孙波 杨春丽 

机构地区：[1]辽宁工程技术大学,阜新123000 [2]煤科集团沈阳研究院有限公司,抚顺113122

出　　处：《世界科技研究与发展》2015年第4期338-341,共4页World Sci-Tech R&D

基　　金：大型油气田及煤层气开发国家科技重大专项(2008ZX05041-002)资助

摘　　要：通过建立声学测量实验系统,提出了用声波回声技术测量随钻钻孔深度的技术手段。利用阻抗分析仪测量了发射换能器阻抗特性,同时用脉冲法测量了发射换能器频谱,研究了单脉冲激发和burst信号激发测量等直径钻杆的波形和频谱。实验结果表明,利用不同频率的信号进行激发时,频率为2.5 k Hz的信号更适宜于声波传播。波形随着钻杆长度的增加而衰减,可测量的钻杆长度为30 m。对于等直径的伪钻杆结构,理论上一次直达波可传播480 m,但在当前的实验条件下可传播的距离只有120 m。By establishing an experimental system of acoustic measurement, the method of measuring the acoustic echo tech- nique with the depth of drilling is proposed. The impedance characteristics of the transducer were measured by impedance analyzer, and the spectrum of the transmitting transducer was measured by pulse method, and the waveforms and spectra of the diameter of the drill rod, such as single pulse excitation and burst signal excitation, were studied. Experimental results show that the signal is more suitable for the measurement of acoustic wave propagation in the frequency of 2. 5 kHz. With the increase of the length of the drii1 pipe, the waveform is fast and can be measured. The length of the drill pipe is 30m. The diameter of the pseudo drill pipe structure ,the theory on a direct waves propagation 480 m. under the current experi- mental conditions can be the propagation distance of 120 m.

关 键 词：孔深 测定 实验系统 换能器 频谱 滤波 

分 类 号：TE24[石油与天然气工程—油气井工程] P631.81[天文地球—地质矿产勘探]