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

• 地球探测与信息技术 • 上一篇    下一篇

基于分数阶Fourier变换的声波测井全波列特征时频分析

王祝文1|向旻1|刘菁华1|王晓丽1,2|张雪昂1|杨闯1   

  1. 1.吉林大学地球探测科学与技术学院|长春130026;2.吉林大学学报编辑部|长春130026
  • 收稿日期:2012-05-11 出版日期:2012-09-26 发布日期:2012-09-26
  • 作者简介:王祝文(1961-)|男|教授|博士生导师|博士|主要从事地球物理测井、核地球物理、测井新方法新技术等方面的解释理论和方法的教学与科研工作|E-mail:wangzw@jlu.edu.cn
  • 基金资助:

    国家自然科学基金项目(40874059)

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

摘要:

目前,阵列声波测井信号处理大多在时间域或频率域中进行。但是,单纯的时间域或频率域方法有很大的局限性。为了打破这些局限性,笔者将分数阶Fourier变换方法用于阵列声波测井信号的分析之中,研究了不同性质储集层中信号幅度随分数阶Fourier变换阶数变化的规律。实验结果表明:在干层,幅度呈“1”型分布;在水层,幅度呈“Y”型分布,“Y”的两支开口较小,在阶数大于0.3的区域中,幅度较大;在油层,幅度呈“Y”型分布,“Y”的两支开口较大,在阶数大于0.6的区域中,幅度较大。因此,分数阶Fourier变换在提取阵列声波测井蕴含的储集层流体性质信息方面具有很好的前景。

关键词: 分数阶Fourier变换, 阵列声波测井, 储集层, 流体性质, 信息提取

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

中图分类号: 

  • P631.8
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