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从波动声学的角度讨论声波测井的探测深度问题。依据不同时刻液体固体界面附近的波阵面所反映的声波在液体和固体中的传播特征及其在液固界面上的耦合关系 ,确定了液固水平界面情况下声波测井的探测深度的概念。与电法和放射性测井等基于稳态情况下的解以及依据这些解建立的探测深度的概念不同 ,基于声传播过程的声波测井有一个最小探测深度的概念。基于两种不同声速的固体界面上声波的耦合关系实验结果 ,分析了长源距声波测井能够测量声速较高的原状地层纵波速度的原理。
Discuss the sounding depth of sonic logging from the perspective of wave acoustics. According to the propagation characteristics of sound waves in liquid and solid and the coupling relationship between them at liquid-solid interface reflected by the wave front near liquid-solid interface at different time, the concept of sounding depth . Unlike the solutions based on steady-state solutions, such as electrical and radiological logging, and the probing depths established from these solutions, acoustic logging based on acoustic propagation has a concept of minimum probing depth. Based on the experimental results of acoustic coupling between two different acoustic velocities at solid interface, the principle of long-distance acoustic logging can be used to measure the P-