Omega系统巨浪噪声衰减及逐点速度分析技术的应用
|
摘要
在塔里木盆地山地资料中常常发育有“挂面条”噪声,这类噪声的存在对后续的反褶积等处理影响很大,传统的方法难以对其进行有效的压制。基于空间中值滤波算法的巨浪噪声衰减技术对于此类噪声的衰减效果良好,但其应用存在一些限制条件。通过研究提出了一个突破这些限制的有效解决方案。逐点速度分析技术解决了常规速度分析方法存在的缺陷,它在常规动校正和切除的基础上,进行逐点CMP速度分析并自动生成速度函数。实际处理表明,该技术能进一步提高叠加速度的精度,改善构造复杂区或速度横向变化较大时的叠加成像。
The noodle hang-like noise often presented in the seismic data of mountain area in Tarim basin greatly affects the validity of following deconvolution processing.It is difficult to effectively eliminate this kind of noise using conventional methods.A new approach named swell noise attenuation,which is based on spatial median filter arithmetic,can be adopted to suppress such a noise with some limitations.This paper presents spatial continuous velocity analysis technique,an effective solution to overcome these limitations.This technique depends on conventional NMO and mute as well as CMP velocity analysis,self-creates suitable velocity functions in order to resolve the deficiency existed in conventional velocity analysis.The case study shows that using this technique can be able to further improve the precision of stacking velocity and imaging in complex structural areas or with big variation of lateral velocity.
The noodle hang-like noise often presented in the seismic data of mountain area in Tarim basin greatly affects the validity of following deconvolution processing.It is difficult to effectively eliminate this kind of noise using conventional methods.A new approach named swell noise attenuation,which is based on spatial median filter arithmetic,can be adopted to suppress such a noise with some limitations.This paper presents spatial continuous velocity analysis technique,an effective solution to overcome these limitations.This technique depends on conventional NMO and mute as well as CMP velocity analysis,self-creates suitable velocity functions in order to resolve the deficiency existed in conventional velocity analysis.The case study shows that using this technique can be able to further improve the precision of stacking velocity and imaging in complex structural areas or with big variation of lateral velocity.
引文
[1]陈兴盛,周建军,陈新.叠前去噪方法在吐哈盆地地震资料处理中的应用[J].新疆石油地质,2000,21(4):292-294.
[2]许峰,李海燕,周述才.去噪技术在新疆地震资料处理中的应用[J].新疆石油地质,1999,20(1):172-175.
[3]夏洪瑞,冯德刚,周开明.剩余动校正量的拾取与消除[J].石油地球物理勘探,1997,3(2 6):872-877.
[4]苑春方,余钦范,王彦春,等.动校正剩余时差的估计与校正[J].石油物探,2002,4(1 3):317-321.
[2]许峰,李海燕,周述才.去噪技术在新疆地震资料处理中的应用[J].新疆石油地质,1999,20(1):172-175.
[3]夏洪瑞,冯德刚,周开明.剩余动校正量的拾取与消除[J].石油地球物理勘探,1997,3(2 6):872-877.
[4]苑春方,余钦范,王彦春,等.动校正剩余时差的估计与校正[J].石油物探,2002,4(1 3):317-321.
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