摘要
传统的单程波动方程偏移算法对大倾角成像困难,本文基于时空域任意广角单程声波方程,通过对时间变量进行傅立叶变换得到其频率-空间域形式,利用有限差分进行离散化,设计并实现了频率-空间域有限差分叠后偏移成像算法。模型试算表明,该方法能够通过参数优化使得低阶数算子适应较大倾角地层的偏移成像。
It is limited for migration algorithm based on the conventional one-way wave equation to image geological structure with large angle correctly. Based on the time-space domain arbitrarily wide-angle equation, a new frequency-space domain finite-difference post-stack migration scheme is developed by transforming time-variable through the Fourier transform into frequency domain, using finite difference discretization. Test of the models show that the method can adapt to a larger angle strata migration by the parameter optimization.
出处
《CT理论与应用研究（中英文）》
2010年第2期17-24,共8页
Computerized Tomography Theory and Applications
基金
国家高技术研究发展计划(863计划)(2006AA06Z202)
中石油物探重点实验室开放基金(GPKL0802)
