摘要
在低信噪比地震资料处理中,剩余静校正是其中的关键处理环节。传统的剩余静校正方法容易陷入局部极值,难以实现全局寻优,从而造成叠加剖面成像效果不佳。为此,提出了一种高精度的非线性剩余静校正方法,该方法以互相关值最大为目标函数,采用了逐步缩小范围的郭涛算法进行剩余静校正量的全局寻优。通过理论模型和低信噪比资料的测试表明,该方法优于传统的剩余静校正方法,能够快速逼近全局最优解,并且能够有效改善低信噪比地震资料的成像效果。
Residual static correction was the key to process the low signal-to-noise ratio seismic data.The traditional residual static correction was easy to fall into the local value,and it was difficult to realize the global optimization,which would result in bad stacking of imaging effect.To solve these problems,a non-linear inversion method of residual static correction was proposed.In this method,the cross-correlation value was the maximum objective function,the optimal residual static correction value was searched by the GT(Guotao)Algorithm with variable search intervals for global optimization.The theoretical model and test of low-signal-noise data show that the method is better than the traditional residual static correction,its convergence in global range is rapid,and can greatly improve the imaging quality of the low signal-to-noise ratio seismic data.
出处
《石油天然气学报》
CAS
CSCD
2014年第2期62-65,6,共4页
Journal of Oil and Gas Technology
基金
中国石油天然气集团公司科学研究与技术开发项目(2011B-3706)
关键词
改进的郭涛算法
反演
剩余静校正
improved GT Algorithm
inversion
residual static correction
