J4 ›› 2012, Vol. 42 ›› Issue (5): 1553-1559.

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Time-Frequency Analysis for Full Waveform Characteristics of Acoustic Logging Based on Fractal Fourier Transform

Wang Zhu-wen1, Xiang Min1, Liu Jing-hua1, Wang Xiao-li1|2, Zhang Xue-ang1, Yang Chuang1   

  1. 1.College of GeoExploration Science and Technology, Jilin University, Changchun130026|China;
    2.Editorial Department of Journal, Jilin University, Changchun130026, China
  • Received:2012-05-11 Online:2012-09-26 Published:2012-09-26

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Abstract:

As we knew, most of the process techniques for array acoustic logging data still use the analysis methods only in either time domain or frequency domain, but these methods all have obvious limitation for signal analysis. In order to break these limitations, the authors used the fratal Fourier for analysing the array acoustic logging signals and researching the law of signal amplitude variation with the order of the fratal Fourier transform variation in different kinds of reservoirs. As the results, in the dry formation, amplitude shows “1” type distribution;In water formation, amplitude shows “Y” type distribution, two branch of “Y” open narrow and in area of order greater than 0.3, amplitude is larger; In oil formation, amplitude shows “Y” type distribution, two branch of “Y” open wide and in area of order greater than 0.6, amplitude is larger. So the fratal Fourier transform have very good prospect for extracting the reservoir liquid properties information embedded in the array acoustic logging data.

Key words: fractal Fourier transforms, array acoustic logging, reservoirs, liquid properties, information extraction

CLC Number: 

  • P631.8
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