Page Time-Frequency Distribution Characteristics Of Array Acoustic Logging Signal

As one of the main methods of geophysical logging, sonic logging plays an important part. For the array acoustic data,time- frequency analysis used to process data was proposed in this paper. That was when analyzing signals, relating the information about frequency of acoustic signals with time information. In this paper, the second-time-frequency analysis-Page distribution which had a more obvious physical sense was used. It has gotten very good results for the acoustic array which contained a number of components,non-stationary signals. Page distribution can make it better curb cross-term and has better resolution.In this paper, analyzing the raw data, eliminate the gaining of the raw signal and Fourier transform filter processing to provide accurate, non-interferential data for the behind the work. The Page energy distribution picture (Contour and 3D) of the array measured by array acoustic logging was made. The different characteristics of the reservoir and non-reservoir were summed up. And then the time-frequency characteristics of the oil-water reservoir with different nature of the oil-water was analyzed and summarized especially.Through processing the data of the array acoustic with time-frequency method, noise and other interference signals are not only suppressed, but also distribution characteristics of the energy of each wave at different times and different frequency.