反偏移技术对叠前资料的噪声消除
|
摘要
在采集的地震资料中,存在各种噪声,现有的去噪软件对某些噪声消除的同时,对有效信号也有一定的压制。本文采用射线理论的非递推Kirchhoff积分法,研究了针对低信噪比的单炮地震记录的反偏移技术。它可以增强有效信号,消弱随机噪声,提高地震资料的信噪比。实际地震资料处理结果表明,单炮记录信噪比明显提高,速度谱质量得到改善,叠加剖面效果明显。
There are various noise in the seismic data.Many methods available nowadays suppress the effective signal while eliminating some noise.The paper puts forword a demigration technique which aims at the low S/N ratio shot seismic recorders.It adopts non-recursion KIRCHHOFF integral method based on ray theory,which can enhance the effective signal,attenuate the random noise improve the S/N ratio of seismic data. The results show that the S/N ratio of shot recorders is increased,the quality of velocity spectrum is improved and the effect of stacked section is obvious better.
There are various noise in the seismic data.Many methods available nowadays suppress the effective signal while eliminating some noise.The paper puts forword a demigration technique which aims at the low S/N ratio shot seismic recorders.It adopts non-recursion KIRCHHOFF integral method based on ray theory,which can enhance the effective signal,attenuate the random noise improve the S/N ratio of seismic data. The results show that the S/N ratio of shot recorders is increased,the quality of velocity spectrum is improved and the effect of stacked section is obvious better.
引文
1Jianguo Sun.Limited-aperture migration.Geophysics,2000,65(2):584￣595
2孙建国.Kirchhoff型真振幅偏移与反偏移.勘探地球物理进展,2000,25(6):1￣5
3马在田.论反射地震偏移成像.勘探地球物理进展,2002,25(3):1￣5
2孙建国.Kirchhoff型真振幅偏移与反偏移.勘探地球物理进展,2000,25(6):1￣5
3马在田.论反射地震偏移成像.勘探地球物理进展,2002,25(3):1￣5
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