低频液体声学参数的实验测量  

Measurement of acoustic parameters of a liquid in low frequency

作　　者：丛健生[1] 刘力[2] 谭宁[2] 车承轩[1] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318 [2]吉林石油集团有限责任公司测井公司,吉林松原138003

出　　处：《大庆石油学院学报》2005年第6期14-16,共3页Journal of Daqing Petroleum Institute

基　　金：黑龙江省自然科学基金资助项目(A2004-03)

摘　　要：低频(2 kHz)液体(如泥浆、聚合物溶液等)的声学参数对于油气井的精确解释具有重要意义.根据共振声谱学原理,给出最低阶模式液体声速表达式,建立了低频液体声学参数实验测量系统,测量得到了变压器油的声速、声阻抗及其品质因子.利用脉冲反射法测量得到了高频(1 MHz)时变压器油的声速、声阻抗率.结果表明:低频法测量得到的声速和声阻抗率略小于脉冲反射法的测量结果.共振声谱法适用于低频液体的声参数测量.The acoustic parameters of a liquid in low frequency,such as mud,polymer etc.,are very important for the log interpretation technology.Based on the theory of acoustic resonance spectroscopy(ARS),the expressions of acoustic velocity of a liquid are derived in the lowest mode.The measuring system of ARS is established for measuring the velocity,acoustic impedance and attenuation factor of a liquid in a low frequency(about 2 kHz).The velocity and acoustic impedance of the liquid in a high frequency(about 1 MHz) are also measured through the pulse reflect method.The results show that the velocity,acoustic impedance measured through the low frequency method are mostly the same as those measured through the pulse reflection method;the method of ARS may be applied to the measurement of acoustic parameters of a liquid in low frequency.

关 键 词：共振声谱 声参数 品质因子 测量系统 

分 类 号：P631[天文地球—地质矿产勘探]