小波变换在瞬时带宽提取中的应用

基金项目:

大庆油田联合资助的“九五”重大课题(编号:49894190)

中国科学院知识创新工程重大项目(编号:KZXCL-Y-01)

国家自然科学基金

详细信息

Applications of wavelet transform for extraction of instantaneous spectrum bandwidth

1. School of Earth science, Jiling University, Changchun 130023, China;
2. School of Electronic & Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
3. School of Electronics & Information Engineering, Nothwestern polytechnical University, Xi'an 710072, China

摘要: 采用最佳匹配地震子波的解析小波 (简称SW小波) 作为基本小波, 提出了基于小波变换计算瞬时带宽的方法 (简称小波换变方法)。通过比较小波变换方法和通常使用的基于希尔伯特变换的瞬时带宽计算方法 (简称希尔伯特变换方法), 结果表明小波变换方法在精确度和抗噪性能等方面优于希尔伯特变换方法。用小波变换方法来计算某油田地震记录的瞬时带宽图, 结果可清楚的看到古潜沟的位置和模式。
- 小波分析 /
- 瞬时带宽 /
- 地震资料解释
Abstract: By taking one of the analyzing wavelet as basic wavelet, which best matching seismic wavelets, a new method of calculating the instantaneous spectrum bandwidth (ISB) is given (called WT method).For a comparison between WT method and the commonly used Hibert Transform (HT method), the ISB maps of a noisy synthetic data are calculated using both methods.The results demonstrated the advantages of WT method over HT method both in precision and in anti-noise performance.The WT method was used for calculating the ISB map of a seismic recording from an oilfield;the map of the ISB distinctly displyed the position and pattern of an ancient subsurface ditch.
- wavelet analysis /
- instantaneous bandwidth /
- seismic data interpretation.