|
|||||
|
|
| 时频～炮检距域面波衰减方法及应用 | |
| 引用本文： | 杨兆斌,张铭记,贾正虹.时频～炮检距域面波衰减方法及应用[J].物探化探计算技术,2011,33(1):30-35,118. |
| 作者姓名： | 杨兆斌 张铭记 贾正虹 |
| 作者单位： | 1. 东方地球物理公司研究院,河北,涿州,072750 2. 东方地球物理公司,东部勘探事业部长庆经理部,陕西,西安,710021 3. 东方地球物理公司,物探技术研究中心,河北,涿州,072750 |
| 摘 要： | 面波以低频强能量为特征,数据处理中常用的面波衰减技术有:频率滤波、F-K滤波和速度滤波等.由于面波特殊的频散现象,使得上述方法的应用效果受到一定的影响.基于面波的特征随炮检距变化这一特点,提出一种时频～炮检距域面波衰减方法:①对单炮记录中的面波区域做Fourier变换或时频分析,了解面波频率随时间和炮检距的变化规律;②... |
| 关 键 词： | 面波衰减 时频～炮检距域 高密度 点接收 滤波 |
Ground roll attenuation in time-frequency and its application |
|
| YANG Zhao-bin,ZHANG Ming-ji,JIA Zheng-hong.Ground roll attenuation in time-frequency and its application[J].Computing Techniques For Geophysical and Geochemical Exploration,2011,33(1):30-35,118. | |
| Authors: | YANG Zhao-bin ZHANG Ming-ji JIA Zheng-hong |
| Institution: | 1.Geophysical Research Institute of BGP,CNPC,Zhuozhou Heibei 072750,China;2.ChangQing Branch in East Exploration of BGP,CNPC,Xian,Shanxi 710021,China;3.Geophysical Techniques Research center of BGP,CNPC,Zhuozhou Heibei 072750,China). |
| Abstract: | Ground roll is a kind of strong noises in seismic data.Some methods are applied to attenuate ground roll such as frequency filter,F-K filtering,velocity filtering and so on,which have limitations because of the frequency dispersion of ground roll.A new method is proposed based on the ground roll’s features that change with offsets,which includes(1) understanding the characteristics of ground roll with offsets by decomposing the zone data contained ground roll using Fourier or time-frequency analysis;(2)designing filters with different offsets and apply them to data;(3) Analyzing the removed noises by subtract them from raw data and research the filter parameters;(4) determining the optimal parameters in time-frequency and offset domain to ensure that we attenuate noise and preserve the low frequency signals.Good results are obtained when applying the method to high density seismic data. |
| Keywords: | ground roll attenuation time-frequency and offset domain high density single point receiver filter |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |