基于小波域从叠前地震数据提取地层品质因子Q  

Estimation of Quality Factor Q from Pre-stack Seismic Data in Wavelet Domain

作　　者：袁恩辉[1] 顾汉明[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,武汉430074

出　　处：《工程地球物理学报》2010年第2期190-196,共7页Chinese Journal of Engineering Geophysics

基　　金：国家重点基础研究发展计划(973计划)(编号:2009CB219403)资助

摘　　要：结合小波理论,利用地震波在黏弹性介质中的吸收衰减传播规律,在小波域以修正的复Morlet小波为基本小波,实现了从叠前炮集和共中心点道集地震数据,提取等效地层品质因子,然后通过剥层法估算层品质因子。文中采用地面地震正演记录和实际海上地震资料试算,验证了本文提出的方法的正确性.结果表明,方法正确可行,可靠有效,最后提出改善效果的措施和实际应用中应注意的问题。This paper uses an energy attenuation formula of seismic scale domain from the wavelet theory and seismic wave propagation waves in the wavelet equation in an elastic medium. And subsequently a formula is obtained through which can calculate the factor in the wavelet domain. Using the amended complex Morlet wavelet as analyzing wavelets, a new method for estimating Q-factors from CMP gathers and shot gathers in the wavelet domain is adopted to estimates the Q-factors with layer--stripping approach. By synthetic seismic record and real sea seismic data, we estimate the Q which are nearly the same as model parameter and proved the method we adopted is correct. Desired results have been achieved. The final recommendations on improvement measures and the practical application of results should be attention.

关 键 词：品质因子 共中心点道集 小波变换 均方根品质因子 层品质因子 

分 类 号：P631[天文地球—地质矿产勘探]