基于LSMR算法的斜缆数据鬼波压制方法

发布时间：2018-02-06 00:54

本文关键词： 斜缆去鬼波线性τ-p方程 LSMR算法拓宽频带　出处：《石油地球物理勘探》2017年03期 　论文类型：期刊论文

【摘要】：由于鬼波陷波频率的多样性而使海上地震记录频带变窄、分辨率降低,为此,基于平面波传播理论,推导出τ-p域拖缆观测的总波场与海水表面观测的上行波波场之间新的关系式,建立线性τ-p方程,利用最小平方残差方法(Least Squares Minimal Residual,LSMR)反演求解方程得到海水表面观测的上行波波场,并延拓得到拖缆观测的上行波波场。合成数据及海上实际斜缆数据测试结果表明,本文方法不仅迭代收敛速度快,而且能得到更好、更稳定的解,提高计算效率的同时改善鬼波的压制效果,达到拓宽地震记录频带的目的。
[Abstract]:Because of the diversity of the frequency of ghost wave, the frequency band of offshore seismic records is narrowed and the resolution is reduced. Therefore, the theory of plane wave propagation is based on the theory of plane wave propagation. A new relation between the total wave field observed by towed cable in 蟿 -p domain and the upward wave field observed on sea water surface is derived, and the linear 蟿 -p equation is established. The least square residuals method is used to inverse the equation of least Squares Minimal resilience (LSMR) to obtain the upward wave field observed on the surface of sea water. The combined data and the measured data of the actual skew cable show that the proposed method not only converges fast but also can obtain better and more stable solutions. The efficiency of calculation is improved and the suppression effect of ghost waves is improved to widen the frequency band of seismic records.
【作者单位】：吉林大学地球探测科学与技术学院;中国石化石油物探技术研究院;
【基金】：国家自然科学基金项目(41674124) 国家“863”计划重大项目(2014AA06A605)资助
【分类号】：P631.44

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