远探测声波测井多尺度相关法提取反射波

Extraction of Reflection Wave by Multi-scale Correlation Method of Remote Exploration Acoustic Logging

为解决通过f-k滤波法提取的反射波信噪比低、成像效果差的问题,提出了多尺度相关法提取远探测声波成像测井的反射波,把双树复小波变换和慢度时间相关法结合起来提取反射波,较好地抑制了直达波和噪声,提高了反射波的信噪比和相关性。实验数据及实测数据处理结果表明,多尺度相关法提取的反射波同相轴清晰、信噪比高,是一种反射波测井高精度的波场分析方法。

In order to the problem that the reflection wave extracted using F-K filtering method has low signal-to-noise ratio and poor imaging effect,a multi-scale correlation method for extracting the reflection wave from the remote acoustic reflection imaging logging is proposed, and the dual-tree complex wavelet transform is combined with the slowness time correlation method for the extraction of reflec- tion wave, which well suppresses direct wave and noise, and improves the signal-to-noise ratio and the correlation of reflection wave. The processing results of experimental data and logging data show that the reflection wave extracted using the multi-scale correlation method is of high accuracy and high signal-to-noise ratio. The multi-scale correlation method is a kind of wave field analysis method with high accuracy for reflection wave logging.