时频域高分辨地震层序识别  

Seismic Sequence Identifying with High Resolution in Time-Frequency Domain

作　　者：陈学华[1] 贺振华[1] 黄德济[1] 

机构地区：[1]成都理工大学信息工程学院

出　　处：《吉林大学学报（地球科学版）》2008年第1期152-155,共4页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40474044);四川省教育厅青年基金项目(ZY0010)

摘　　要：地震信号频率随着时间的不稳定变化包含了地下反射层序特征的重要信息,时频分析是检测地震信号局部谱特征的重要工具。为适应实际地震信号处理,对S变换改进后得到一种新的广义S变换,用于分析和补偿地震信号的高频成分,得到了精细的地震层序识别剖面。实际资料处理表明,它对砂岩油气藏的成层特征的分析具有分辨率高和高信噪比的优点。地震信号的广义S变换时频谱分解可作为地震层序识别和解释的重要补充。The non stationary variation of frequency content of seismic signal with time characterizes information related to the properties of the subsurface reflection stratification. Time-frequency analysis of seismic signal was an important tool for detecting local properties of spectral content. In order to adapt to the seismic signal processing in real application, a generalized S transform （GST） was presented by altering the normal S transform. The seismic sequence identification section with high resolution was achieved by applying GST to analyze and compensate the high frequency content of seismic signal. The real data processing demonstrated that using GST-based time- frequency decomposition, the properties analysis of seismic stratification of sandstone reservoir possess both high resolution and better signal-to-noise ratio. Time - frequency spectral decomposition of seismic signal based on GST can aid in the classification of seismic sequences and serve as an important tool for seismic interpretation.

关 键 词：地震层序 时频分析 S变换 广义S变换 谱分解 

分 类 号：P631.4[天文地球—地质矿产勘探] TN911.7[天文地球—地质学]