摘要：Acoustic full waveform logging provides information about different properties such as compressional waves,shear waves and Stoneley waves,The velocity and amplitude of these waves are closely related to the fluid properties of reservoirs.In this paper,we will introduce the Hilbert-Huang transform and smoothed pseudo Wigner-Ville time-frequency distribution into array acoustic logging signal processing.We can identify reservoir fluid properties by studying the cumulative energy of a signal under different intrinsic modal functions (IMF).The results show that the cumulative energy of water layers is higher than that of gas layers,especially at IMF3.This method was applied to fluids in low-porosity and low-permeability reservoirs in the Sulige gas field and produced good results.
