叠前地震数据射线束道集叠加压制噪声
|
摘要
提出了一种提高叠前地震数据信噪比的射线束道集叠加方法。与共反射面元叠加类似,它基于同相叠加原理,将时差在四分之一周期之内的道数据叠加到一道。首先制定叠加规则,抽取叠前地震数据射线束道集;然后根据同相叠加原理剔除不满足条件的地震道;最后将满足条件的射线束道集通过动校和静校进行叠加。最终得到的叠加道可以起到数据规则化的作用,同时,也可以进行高信噪比的构造成像,提高速度分析的质量。
We propose a prestack noise suppression method based on ray beam stacking. Similar to common surface stacking, this method bases on cophasal stacking principle. It stacks the traces with moveout differences less than 1/4 cycle into one trace. Firstly, set rules for stacking and extract ray beam gathers from prestack seismic data. Secondly, dismiss the seismic traces that do not meet the cophasal stacking principle. Finally, stack the resulting ray beam gathers after performing dynamic correction and static correction. The resulted traces are regularized and can be used for high signal-to-noise ratio structural imaging and high quality velocity analysis.
We propose a prestack noise suppression method based on ray beam stacking. Similar to common surface stacking, this method bases on cophasal stacking principle. It stacks the traces with moveout differences less than 1/4 cycle into one trace. Firstly, set rules for stacking and extract ray beam gathers from prestack seismic data. Secondly, dismiss the seismic traces that do not meet the cophasal stacking principle. Finally, stack the resulting ray beam gathers after performing dynamic correction and static correction. The resulted traces are regularized and can be used for high signal-to-noise ratio structural imaging and high quality velocity analysis.
引文
1石人骥．光学的启示——地震资料横向分辨率问题辨析[J]．石油物探,2003,42(4):562-565
2裴江云．在随机噪音背景下地震反射信号的增强[J]．地球物理学进展,2002,17(1):91-95
3臧绍先,周元泽．N次根倾斜叠加方法在间断面研究中的应用[J]．地球物理学报,2002,45(3):407-415
4 Monk D J, Cowan B. Approach to optimum slant stack and its application as a seismic noise attenuator [J]. Expanded Abstracts of 62nd Annual International SEG Meeting, 1992, 1 161-1 164
5 Sun Yonghe, Qin Fuhao, Checkles S, et al. 3-D pres-tack Kirchhoff beam migration for depth imaging[J]. Geophysics,2000,65(5):1 592-1 603
6 Sun Yonghe, Fuhao Qin, Checkles S, et al. A beam approach to Kirchhoff depth imaging[J]. The Leading Edge,2000,19(11):1 168-1 173
2裴江云．在随机噪音背景下地震反射信号的增强[J]．地球物理学进展,2002,17(1):91-95
3臧绍先,周元泽．N次根倾斜叠加方法在间断面研究中的应用[J]．地球物理学报,2002,45(3):407-415
4 Monk D J, Cowan B. Approach to optimum slant stack and its application as a seismic noise attenuator [J]. Expanded Abstracts of 62nd Annual International SEG Meeting, 1992, 1 161-1 164
5 Sun Yonghe, Qin Fuhao, Checkles S, et al. 3-D pres-tack Kirchhoff beam migration for depth imaging[J]. Geophysics,2000,65(5):1 592-1 603
6 Sun Yonghe, Fuhao Qin, Checkles S, et al. A beam approach to Kirchhoff depth imaging[J]. The Leading Edge,2000,19(11):1 168-1 173
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