叠前反Q滤波与品质因数Q估计

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英文篇名：PRESTACKING INVERSE Q FILTERRING AND QUALITY-FACTOR Q ESTIMATION 中文刊名：物探化探计算技术 英文刊名：COMPUTING TECHNIQUES FOR GIOPHYSICAL AND GEOCHENICAL EXPLORATION 作者：赵宪生 ; 黄德济 英文作者：Zhao Xiansheng ; Huang Deji(Chengdu Institute of Technology) 出版日期：1995-02-28 机构：成都理工学院 年：1995 期：01 出版单位：物探化探计算技术

摘要

应用Ｈａｒｇｒｅａｖｅｓ的反Ｑ滤波算法，可准确校正零炮检距射线路径条件下地震记录的频散吸收。研究表明，只要能够获得时变的品质因数Ｑ结构，这种反Ｑ滤波算法也同样适用于非零炮检距射线路径条件下地震记录的反Ｑ滤波。本文叙述了采用Ｈａｒｇｒｅａｖｅｓ算于以相邻层间地震子波相似系数的相关性确定品质因数Ｑ的方法原理，并对相速度弥散式及参考频率ω＿ｒ的选取方法进行了讨论，数值模拟结果表明，用该方法提取的Ｑ值，可实现迭前反Ｑ滤波处理，能使浅、中、深层地震子波波形基本保持一致。
The dispersion abeorption of seismic data with zero offset ray peth can be reduced significantly byusing the Hargreavers′s inverse Q filter.It has been shown that onece the time-variing Q factorsknown,the inverse Q filter algorithm could also be extented to non-zero offset seismic data。This po per deals with the determination of quality-factor Q based on the semblance of seismicwavelets in successive layers by Hargreaves′s Opreator methed and the selection of dispersion relation re-lated to phase velocity and reference frequeeies ωr.Numerical modeling results show that the prestack-ing inverse Q filterring can be implimented by using the abstracted Q values and the shaps of seismicwavelets both from shallow layers and from middle- deep layers will be kept consistently。

引文

［1］CahitC，，Ruhi，Saatcilar．《EstimationofQ－FactorforspectralWhitening》［2］N。D。Hargreaves等：1991．一维射线偏移：一种准确而快速的反Q滤波，国外油气勘探，Vol．2，No。5。［3］赵宪生、黄德济：1994．地震记录的Q值正演模拟与反滤波，石油物探，vol．33，No。2。［4］赵建勋等：1992．串联反Q滤波及其应用，石油地球物理勘探，Vol．27．No。6。［5］贺振华、G，H。F加德纳：1985．F一K波动方程偏移的频率域插值方法，Vol．24，No，1。