地震分界面频率属性分析  

Seismic interphase frequency attributes analysis

作　　者：杜世通[1] 

机构地区：[1]石油大学地球资源与信息学院

出　　处：《油气地球物理》2004年第4期39-48,共10页Petroleum Geophysics

摘　　要：分界面的频率属性分析是一项新的地震界面属性拾取和解释方法。与时间域反射波成像、地震振幅研究相比,地震信号频率域的研究较弱。本文系统分析了脉冲信号的各类频率意义,指出瞬时频率属性不能提供在到达时间位置上的准确的简谐成分频率信息;引用傅立叶积分的概念解释了时频分析方法原理,介绍了(俄罗斯)穆申教授的时频分析算法;给出了时频分析剖面、分频剖面、层位切片解释模型以及时频分析数据体的时间剖面显示方式(多频合成时间剖面、多频信息RGB三原色合成时间剖面);发展了三维地震数据体的层位地震数据时频分析技术。文后对三维数据体频率属性结果的应用给出了一些提示。Analysis of interphase frequency attributes is a seismic interphase attributes extraction and interpretation method.The study of seismic signal in frequency domain is less developed than that of reflection image and amplitudein time domain. The paper analyzes systematically the meaning of all kinds of frequencies, and points out that the at-tributes of instantaneous frequency can't provide exact frequency information of simple harmonic wave at the ar-rived time position. The principle of time-frequency analysis is explained by the concept of Fourier integral, and pro-fessor Mushin time-frequency analysis algorithm is also introduced. The paper provides sections of time-frequencyanalysis and frequency division, the interpretation model of horizon slice and the display systems of time sections(multi-frequency synthetic time section, multi-frequency information RGB tricolor time section) of time frequencyanalysis data volume. The horizon time frequency analysis of 3D seismic data volume is developed greatly. Appliedmethods for the results of 3D data volumes are provided.

关 键 词：分界面 地震勘探技术 地震信号 频率 属性分析技术 脉冲信号 分频剖面 

分 类 号：P631.44[天文地球—地质矿产勘探]