一种基于连续补偿函数的时变增益限反Q滤波方法  

A new time-varying gain limits inverse Q filtering with the continuous compensation function

作　　者：邓儒炳 阎建国[1] 陈琪 宋鑫磊 DENG Ru-Bing;YAN Jian-Guo;CHEN Qi;SONG Xin-Lei(College of Geophysics,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地球物理学院,四川成都610059

出　　处：《物探与化探》2021年第3期702-711,共10页Geophysical and Geochemical Exploration

基　　金：中国石油科技重大专项(2017E⁃0402,2019E⁃26)。

摘　　要：反Q滤波是提高地震资料分辨率和保幅处理的常用方法之一,在地震储层预测中具有重要的实用价值。长期以来人们不断加以研究改进,其中采用时变增益限振幅补偿函数的反Q滤波方法是当前研究改进的方向之一。本文通过对几种常用的反Q滤波方法进行研究,提出了一种基于Teager-Kaiser能量原理求取振幅补偿函数增益限的时变增益限反Q滤波方法,改进了传统反Q滤波方法中存在的不足。新方法基于平滑连续函数而不是基于常用反Q滤波方法中采用的分段函数或截止频率来计算补偿函数的时变增益极限,因此新方法具有稳定调整时变增益极限的优点,从而提高了反Q滤波的可靠性和精度,特别是对于深层介质的保幅及分辨率提高效果较好。本文用理论模型及实际资料证明了新方法的有效性及实用性。Inverse Q filtering is one of the practical methods for improving the resolution and preserving the amplitude of seismic data, and hence it has important practical value in seismic reservoir prediction.Researchers have been studying the function of amplitude for a long time, and have found that the inverse Q filtering method using time-varying amplitude compensation function is one of the current research and improvement directions.In this paper, by studying several commonly used and effective inverse Q filtering methods, a time-varying gain limit inverse Q filtering method based on the Teager-Kaiser energy principle to obtain the gain limit of the amplitude compensation function is proposed, which improves the traditional inverse Q filter.The new method calculates the time-varying gain limit of the compensation function based on a smooth continuous function instead of the piecewise function or cut-off frequency used in traditional inverse Q filtering.Therefore, the new method has the advantage of stably adjusting the time-varying gain limit, so it can increase the accuracy of the inverse Q filter, especially for the amplitude preservation and resolution improvement of deep media.The effectiveness and practicability of the proposed method were proved with theoretical models and practical data.

关 键 词：振幅损失 相位畸变 衰减补偿 高分辨率地震资料 反Q滤波 

分 类 号：P631.4[天文地球—地质矿产勘探]