摘要
地震信号的时频特性分析对于地层界面分析和油气储层研究具有重要意义。不同频段的地震数据反映的地质信息也不同,即不同频率成分对应不同性质的界面信息。地震信号是典型的非平稳信号,应用适合于非平稳信号的时频分析方法研究地震信号的时频特性,能够较好地反映信号频率随时间的变化情况,并且可为后续的地层界面及储层分析提供帮助。本文采用具有高分辨特性的同步挤压变换时频方法分析地震信号的时频特性,较之于传统小波时频分析能更加真实地反映地震信号的频率随时间的变化情况。
The time-frequency characteristic analysis of seismic prospecting signal is important to stratigraphic interface analysis and hydrocarbon reservoir research.The different frequency bands of seismic data reflect different geological information,that is,different frequency components correspond to interface information of different properties.Seismic signal is a typical non-stationary signal,applying the time-frequency analysis method which is suitable for non-stationary signals to study the time-frequency characteristics of seismic signals,could reflect the change of signal frequency with time better and provide help for subsequent stratigraphic interface and reservoir analysis.This paper adopts the time-frequency method named synchrosqueezing transform of high resolution characteristic to analyze the time-frequency characteristic of seismic signals.Compared with conventional wavelet time-frequency analysis,it can reflect the signal frequency variation of seismic signal with time more truly by the synchrosqueezing transform.
作者
张琪
刘彦萍
Zhang Qi;Liu Yanping(Electronic Engineering College,Xi’an Shiyou University,shaanxi 710065,China)
出处
《石化技术》
CAS
2019年第8期116-118,127,共4页
Petrochemical Industry Technology
基金
国家自然科学基金青年科学基金项目,41704106
陕西省自然科学基础研究计划项目(青年),2018JQ4045
国家级大学生创新创业训练计划项目,201710705029
关键词
地震信号
时频分析
高分辨特性
同步挤压变换
seismic signal
time-frequency analysis
high resolution characteristic
synchrosqueezing transform
