| 基于广义S变换的测井信号时频谱分析 |
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| 引用本文： | 魏学强,李辉峰,酆少英,石宝文,张国际.基于广义S变换的测井信号时频谱分析[J].工程地球物理学报,2014(1):60-65. |
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| 作者姓名： | 魏学强 李辉峰 酆少英 石宝文 张国际 |
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| 作者单位： | [1]中国地震局地球物理勘探中心,河南郑州450002 [2]西安石油大学地球科学与工程学院,陕西西安710065 |
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| 基金项目： | 国家科技重大专项项目（编号：2011ZX05024-001-03）资助. |
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| 摘 要： | S变换虽兼备短时傅里叶变换和小波变换的优点,但基本小波固定,在薄互层识别方面受到较大限制。广义S变换,通过引入λ,p两个参数对S变换中的高斯窗函数进行改造,时频分辨率得到了明显提高。本文在对广义S变换方法原理进一步研究的基础上,应用VC++在Qt平台上编写了广义S变换时频分析程序,并构造平稳信号和非平稳信号进行了对比分析,凸显了广义S变换的时频聚焦性。最后,应用该方法对实际测井信号进行了时频谱分析,取得了良好效果。
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| 关 键 词： | 测井信号 广义S变换 时频谱分析 |
The Logging Signal Time-frequency Spectrum Analysis Based on Generalized S Transform |
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| Wei Xueqiang,Li Huifeng,Feng Shaoying,Shi Baowen,Zhang Guoji.The Logging Signal Time-frequency Spectrum Analysis Based on Generalized S Transform[J].Chinese Journal of Engineering Geophysics,2014(1):60-65. |
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| Authors: | Wei Xueqiang Li Huifeng Feng Shaoying Shi Baowen Zhang Guoji |
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| Affiliation: | 1. Geophysical Exploration Center , China Earthquake Administration, Zhengzhou Henan 450002, China 2. School of Earth Sciences and Engineering, Xi＇an Shi you University, Xi ＇ an Shanxi 710065, China) |
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| Abstract: | S transform（ST） is combined with the advantages of short--time Fourier trans- form（STFT） and wavelet transform（WT）. However, the basic wavelet of ST is so fixed that it is very limited in identifying the thin inter--bed strata. As generalized S transform （GST）, due to introduce ,l and p parameters to change the window function of ST, the time --frequency resolution is improved greatly. The program of GST time--frequency analysis is written by VC＋＋ under platform of Qt after deeply studying the principle of GST,and it reflects the high time--frequency focusing properties of GST through comparing the sta- tionary signal and non--stationary signal. Finally, the method is used to analyze the time-- frequency spectrum of the actual logging signals, and obtain a good result. |
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| Keywords: | logging signal generalized S transform time--frequency spectrum analysis |
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