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声波测井记录中有关横波速度的估计是目前需要解决的一个难题,原因在于伴随着横波存在着强伪瑞利波(Pseudo-Rayleigh Wave),为了有效地抑制干扰波,突出横波的强度,必须估计测井信号的非色散谱。本文详细讨论了利用CT技术中卷积反投影重建技术估计多道测井记录的非色散谱的算法,并由此进一步得到横波波速的估计。计算机模拟结果表明该算法是有效的,在估计精度上优于传统的相似处理技术。
The estimation of S-wave velocity in sonic logging is a difficult problem that needs to be solved at present. The reason is that with the existence of Pseudo-Rayleigh waves, it is necessary to emphasize the intensity of S-waves in order to effectively suppress the interference waves. Estimate the non-dispersive spectrum of the logging signal. This paper discusses in detail the algorithm of estimating the non-dispersive spectra of multi-channel logs by convolution backprojection reconstruction technique in CT and further obtains the estimation of wave velocity. Computer simulation results show that the algorithm is effective and superior to the traditional similarity processing in estimation accuracy.