基于任意广角波动方程的频率-空间域深度偏移方法研究

基金项目:

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)

详细信息

The Frequency-Space Domain Depth Migration Based on Arbitrarily Wide-Angle Wave Equation

College of Computer and Communication Engineering, China University of Petroleum(East China), Dongying 257061, China

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。
- 任意广角波动方程 /
- 频率-空间域 /
- 深度偏移
Abstract: 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.
- AWWE /
- frequency-space domain /
- depth migration