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反偏移技术对叠前资料的噪声消除

查树贵,陈洪堤,龚小金
(中国石化江汉油田分公司物探研究院,湖北 潜江 433100)

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。
关键词 叠前时间偏移 反偏移 低信噪比
 



Demigration Technolgy Used to Eliminate the Noise in Prestack Data

Zha ShuguiChen HongdiGong Xiaojin
(Geophysical prospecting Research Institute JiangHan oil field,Sinopec 433100)

[Abstract] 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.
[Keywords] Prestack time migration;Demigration;Low S/N ratio.q



作者简介:查树贵,教授级高级工程师,1993年毕业于中国石油大学(北京)应用地球物理专业,现就职于中国石化江汉油田分公司物探研究院,任院长职务,一致从事地震资料数字处理方法研究,获部、局科技进步奖多项,发表科技论文多篇。