基于匹配滤波的保幅动校拉伸校正方法  

A NMO stretch correction based on an amplitude-preserved matched filtering

作　　者：罗鑫[1,2] 陈学华[1,2] 齐迎凯 宋丽娟[3] 周元茂 

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]成都理工大学地球探测与信息技术教育部重点实验室,四川成都610059 [3]成都理工大学外国语学院,四川成都610059

出　　处：《石油地球物理勘探》2016年第4期654-660,1,共7页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目(41374134);国家自然科学基金项目(41574130)联合资助;四川省杰出青年科学基金项目(2013JQ0011)

摘　　要：动校拉伸现象会影响地震资料的分辨率和AVO分析,而常规的动校拉伸校正方法会破坏原始地震资料的振幅变化信息,破坏AVO效应。本文利用匹配滤波算法,可以有效消除动校正拉伸现象,使同相轴更连续,消除常规NMO引起的频率降低现象,提高地震资料的分辨率,而且可以有效保留原始地震资料的振幅随炮检距的变化信息。该算法不需要已知地震子波,适合任何炮检距的地震资料。NMO correction is an important step in seismic data processing. However, conventional NMO correction leads to seismic wavelet stretch, especially for shallow far-offset seismic data in which wavelet shifts to lower frequency and amplitude gets larger. This NMO stretch damages seismic data resolution and affects AVO analysis. We propose in this paper an approach to NMO stretch correction based on an amplitude-preserved matched filtering algorithm. The proposed approach can enhance seismic event continuity, eliminate frequency shifts, and improve data resolution. Furthermore, it can preserve inherent amplitude variation in original data. This approach is suitable for any offset seismic data without knowing its wavelet. © 2016, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.

关 键 词：匹配滤波 动校拉伸校正 保幅 AVO效应 

分 类 号：P631[天文地球—地质矿产勘探]