压制叠前相干噪音的速度变换域滤波方法
|
摘要
叠前压制相干噪音是地震资料处理技术研究中的重要课题之一。由于各种相干噪音具有不同的特性 ,所以必须采用不同的压制方法。本文提出的压制叠前相干噪音的速度变换域滤波方法 ,依据叠前地震资料中折射波以及各种形式的面波与视速度或叠加速度存在不同关系这一特征 ,有针对性地选择叠前道集的相应速度变换域进行有针对性的滤波 ,从而不仅可以对相应的噪音进行有效的压制 ,而且可以使有效信号得到较好的保护。将此法用于实际资料处理 ,效果明显。
Prestack coherent noise elimination is an important study topic in seismic data processing. Different noise elimination methods should be adopted due to the distinct characteristics of various coherent noises. This paper presents a method that suppresses prestack coherent noises via filtering in different velocity domains. The method is based on the fact that in the prestack data, the relationships between refracted waves and various surface waves with apparent velocities or stack velocities are varied. Thus, different filtering may be carried out in different domains in accordance with the different gathers. The method not only can effectively suppress prestack coherent noises, but also can prevent efficient signals from attenuation. Satisfactory results have been obtained by applying this method to real data processing.
Prestack coherent noise elimination is an important study topic in seismic data processing. Different noise elimination methods should be adopted due to the distinct characteristics of various coherent noises. This paper presents a method that suppresses prestack coherent noises via filtering in different velocity domains. The method is based on the fact that in the prestack data, the relationships between refracted waves and various surface waves with apparent velocities or stack velocities are varied. Thus, different filtering may be carried out in different domains in accordance with the different gathers. The method not only can effectively suppress prestack coherent noises, but also can prevent efficient signals from attenuation. Satisfactory results have been obtained by applying this method to real data processing.
引文
1 YilmazO .SeismicDataProcessing.1988
2 陈遵德,段天友,朱广生.SVD滤波方法的改进及应用.石油地球物理勘探,1994,29(6):783～792
3 EugeneLichmanetal.没有吉布斯效应的高分辨率速度陷波滤波器.程芳译.国外油气勘探,1998,10(3):314～326
4 ReiterEC ,ToksozMN ,PurdyGM .Asemblanceguidedmedianfilter.GeophysicalProspecting,1993,41:15～41
5 LinvilleAF ,MeekRA .Aprocedureforoptimallyremovinglocalizedcoherentnoise.Geophysics,1995,60(1):191～203
6 李卫忠,张明振,王成礼,等.压制面波的波场分离方法.石油地球物理勘探,1998,33(5):679～690
7 程荃.改进的叠前去噪方法.石油地球物理勘探,1999,34(4):453～456
8 LiuX .GroundrollsuppressionusingtheKarhunen-Loevetransform.Geophysics,1999,64(2):564～566
9 蔡希玲.声波和强能量干扰的分频自适应检测与压制方法.石油地球物理勘探,1999,34(4):373～380
10 吕景贵.基于速度的波场变换叠前噪音压制处理技术方法研究:[学位论文].北京:中国地质大学,2000
2 陈遵德,段天友,朱广生.SVD滤波方法的改进及应用.石油地球物理勘探,1994,29(6):783～792
3 EugeneLichmanetal.没有吉布斯效应的高分辨率速度陷波滤波器.程芳译.国外油气勘探,1998,10(3):314～326
4 ReiterEC ,ToksozMN ,PurdyGM .Asemblanceguidedmedianfilter.GeophysicalProspecting,1993,41:15～41
5 LinvilleAF ,MeekRA .Aprocedureforoptimallyremovinglocalizedcoherentnoise.Geophysics,1995,60(1):191～203
6 李卫忠,张明振,王成礼,等.压制面波的波场分离方法.石油地球物理勘探,1998,33(5):679～690
7 程荃.改进的叠前去噪方法.石油地球物理勘探,1999,34(4):453～456
8 LiuX .GroundrollsuppressionusingtheKarhunen-Loevetransform.Geophysics,1999,64(2):564～566
9 蔡希玲.声波和强能量干扰的分频自适应检测与压制方法.石油地球物理勘探,1999,34(4):373～380
10 吕景贵.基于速度的波场变换叠前噪音压制处理技术方法研究:[学位论文].北京:中国地质大学,2000
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心