Abstract Array acoustic logging plays an important role in formation evaluation. Its data is a non-linear and non-stationary signal and array acoustic logging signals have time-varying spectrum characteristics. Traditional filtering methods are inadequate. We introduce a Hilbert-Huang transform (HHT) which makes full preservation of the non-linear and non-stationary characteristics and has great advantages in the acoustic signal filtering. Using the empirical mode decomposition (EMD) method, the acoustic log waveforms can be decomposed into a finite and often small number of intrinsic mode functions (IMF). The results of applying HHT to real array acoustic logging signal filtering and de-noising are presented to illustrate the efficiency and power of this new method.
This research is supported by National Natural Science Foundation of China (Grant No. 40874059) and the National Key Science Engineering Projects of the Ninth Five Year Plan ([1999]1423).
Cite this article:
WANG Zhu-Wen,LIU Jing-Hua,YUE Chong-Wang et al. The filtering characteristics of HHT and its application in acoustic log waveform signal processing[J]. APPLIED GEOPHYSICS, 2009, 6(1): 8-16.
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