摘要
针对地震信号是非平稳信号 ,本文讨论了非平稳信号理论中的联合时频分布方法及其时频属性。联合时频分布方法把整体频谱推广到局部频率 ,根据频率随着时间的变化情况 ,对信号进行有效的分析。由联合时频分布提取的地震属性 (平均频率、瞬时带宽、扭度、峰态 )可以突破传统的瞬时属性的局限 ,有效地指示地质层位的变化 ,可以作为较好的属性应用于地震资料解释中。
In view of the seismic signal being non-stationary signal,the paper discussed the methods of joint time-frequency distribution in analysis of non-stationary signal theory and its time-frequency attributes.Generalized into local frequen cy from integral frequency,the method of joint time-frequency distribution effe ctively analyzes the signal based on the variation of frequency with time.The attributes (average frequency,instantaneous bandwidth,twist and peak level ) obt ained from joint time-frequency distribution can break out the limitation of tr aditional instantaneous attributes,effectively point out the variation in geolog ic formation and be applied in seismic data interpretation as a good attributtes .
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2003年第5期522-526,共5页
Oil Geophysical Prospecting
