摘要
在三维点源、二维介质构造定义下的Born反散射模型,采用WKBJ近似,建立由地震反射数据求取速度摄动量或反射系数(界面)的反演公式,反演效果与深度偏移类似.本文目的是将所反演的反射系数(界面),用作最优拟合参数反演的反射层位约束信息,也可用作深度偏移处理.本技术在速度场分析、去噪与频率加权以及反射系数界面确定等方面加上智能干预与小波奇异点分析.现已在实际资料应用中取得了满意的地质效果.
We use the 2. 5 dimentional inverse scattering model and WKBJ approximation to derive an inversion formula which relates the refiection coefficients to the recorded seismic data, the method is equivalent to prestack and poststack depth migration with arbitrary reference velocities. The depth section of reflection coefficients and the corresponding relative impedence obtained through this process can be used as geologic constraint information in nonlinear inversion. Effectiveness of the result depends on the reliability of initial guess model.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1995年第A01期112-122,共11页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
地震勘探
反散射技术
变背景速度
拟合参数反演
Inverse scattering technique, Priori information of refectors position constraint,Nonlinear inversion of optimum parameters.