基于S变换求取地层的品质因子Q值  

THE ESTIMATION OF Q UALITY FACTOR BASED ON S-TRANSFORM

作　　者：付勋勋 张君学 陈阵[2] 徐峰[3] 卓新叙 南娜娜 郑博文 

机构地区：[1]中国石油长庆油田分公司第二采油厂,甘肃庆阳745000 [2]中国石油长庆油田分公司超低渗透油藏研究中心,陕西西安710021 [3]西南石油大学资源与环境学院,四川成都610500

出　　处：《物探与化探》2013年第1期113-116,共4页Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2008ZX05046)

摘　　要：地层的品质因子Q对衡量地震波传播过程中的能量衰减以及预测油气具有重要意义。生产中最常用的方法是通过频谱比法求品质因子Q值,但是传统的频谱比法面临时窗选取等问题。利用S变换优越的时频分析特性以及与傅里叶谱直接相联系的特性,提取地层上下界面对应的瞬时频谱,然后通过拟合频率与振幅比的关系,得到地层的品质因子Q值。通过数值模拟证明了该方法的有效性。It is important to measure quality factor Q in the processing of seismic wave propagation and the predictiing of hydrocarbon.In practical production,the most commonly used to estimate quality factor Q is spectral ratio method.However,the traditional spectral ratio method is facing windowing problem.In this paper,the authors took the advantage of superior time-frequency characteristics of the S-transform and the direct linkage between the Fourier spectrum and the S-transform to extract the corresponding instantaneous spectra of the upper and lower interfaces of the formation.Then by fitting the relationship between frequency and amplitude ratio,the authors estimated the quality factor.Numerical simulation shows the effectiveness of this method.

关 键 词：品质因子Q S变换 频谱比法 

分 类 号：P631.4[天文地球—地质矿产勘探]