一种新的剩余静校正方法研究及应用
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摘要
为了弥补自相关方法的缺陷,运用四阶累积量时延估计理论,同时利用高阶统计量对高斯噪声的盲目性和对非高斯噪声也可以起到压制作用的特点,对常规的最大能量法剩余静校正进行改进,得到一种基于四阶累积量时间延迟估计的剩余静校正处理新方法。该方法在处理低信噪比、大剩余静校正量资料时更能体现出独到优势,更适用于山地等复杂地形地震资料的处理工作。和传统方法相比,基于四阶累积量时间延迟估计的剩余静校正方法除在处理速度上略逊于自相关方法外,处理效果更好,鲁棒性更强。
In order to fill a gap of autocorrelation method,this paper applies fourth-order cumulant to estimate time delay.At the same time,in light of the character of high order statistic's being insensitive to Gaussian noise,a new residual static correction method of estimating the time delay by the fourth-order cumulant is achieved through a certain improvement on the conventional residual static correction based on maximum-energy method.The method has the special predominance in processing the seismic data with low signal-to-noise ratio under the condition of complicated near surface or with relevant Gaussian noise and large residual static.Compared with the traditional last static correct method,the model experiment and practical data process indicates that the method performance is excellent and it is more stable and robust excepted processing speed.
In order to fill a gap of autocorrelation method,this paper applies fourth-order cumulant to estimate time delay.At the same time,in light of the character of high order statistic's being insensitive to Gaussian noise,a new residual static correction method of estimating the time delay by the fourth-order cumulant is achieved through a certain improvement on the conventional residual static correction based on maximum-energy method.The method has the special predominance in processing the seismic data with low signal-to-noise ratio under the condition of complicated near surface or with relevant Gaussian noise and large residual static.Compared with the traditional last static correct method,the model experiment and practical data process indicates that the method performance is excellent and it is more stable and robust excepted processing speed.
引文
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[8]熊晓军.基于高阶统计量的地震资料处理与解释方法研究[D].成都:西南石油学院,2004.
[9]尹成.四阶累积量在剩余静校正中的应用研究[J].天然气工业,2004,24(12):48-50.
[2]RothmanD.LargeNear-surfaceAnomalies,SeismicReflectionData and Simulated Annealing[G].Stanford.Explorat ionProject,1985:45.
[3]Kirchheimer F.Residual Static by CDP-localized StackOpti-mization[J].Geophysics Prospecting,1990,38:577-606.
[4]井西利.大剩余静校正量求解的两步法[J].石油地球物理勘探,2003,38(1):22-26.
[5]井西利,李丽,陈淑梅.自适应混合反演剩余静校正[J].石油地球物理勘探,2004,39(2):153-157.
[6]石玉梅,刘天放,谢桂生.三阶累积量法在断层检测和落差估算中的应用[J].地质与勘探,2001,37(4):73-75.
[7]张贤达.时间序列分析-高阶统计量方法[M].北京:清华大学出版社,1996.
[8]熊晓军.基于高阶统计量的地震资料处理与解释方法研究[D].成都:西南石油学院,2004.
[9]尹成.四阶累积量在剩余静校正中的应用研究[J].天然气工业,2004,24(12):48-50.
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