声波测井中首波共振理论的实验验证

Experiments on the Head Wave Resonance Theory in Acoustic Logging

余恬刘银斌：声波测井中首波共振理论的实验验证，测井技术，１９９６（３）２０，１７８～１８５。对声波测井实验资料进行了细致的分析，结果表明首波无几何衰减，Ｓ波特征频率等于简正模式的截止频率，首波的频率和走时与共振理论公式相合，从而全面验证了首波的共振理论。＂临界折射波至＂模型则被实验所否定，对走时公式涉及到的某些概念性问题做了说明，并由共振理论求出了模型井材料的粘滞系数。

S.T.Chenl s experiment modelling acoustic well logging is analysed in detail.The result shows that the head waves do not possess geometrical attenuation, andthat the characteristic frequencies of the S waves are equal to the cut-off frequencieso f the normal modes, and that the frequencies of head waves and their arrival timesare in good agreement with the resonance theory.The theory of 'critical refractedarrival' is shown to be unsuccessful.The two viscosity coefficients of the materialcons.tituting the model well are obtained by the resonance theory.