摘要
基于射线理论的Kirchoff三维偏移方法 ,在解决复杂构造的成像时遇到了困难。基于波动方程的三维叠前深度偏移对横向剧烈变速具有较强的适应性 ,且成像精度较高。Born近似傅里叶偏移方法 ,是基于小扰动假设 ,引入参考慢度 ,可以适应横向变速。利用频率波数域与空间频率域混合域偏移算子 ,构造出炮域波动方程三维叠前深度偏移算法 ,形成相应的处理流程。对SEG/EAGE盐丘模型数据集C的宽方位角三维数据进行了测试 ,实现真正全三维波动方程叠前深度偏移处理 ;对胜利油田CB地区部分海上实际资料进行了试处理。
The common 3 D Kirchhoff migration that is based on ray theory encounters difficulties in imaging complex structures. Born approximated Fourier pre stack depth migration method which is on the hypothesis of small slowness perturbation can accommodate severe lateral velocity variations. In this paper we discuss details about the construction of 3 D wave equation pre stack depth migration algorithm in shot gathers by combining migration operators of frequency wavenumber domain and spatial frequency domain, and its corresponding processing flow. The method has been successfully applied to the data set C of SEG/EADE salt model and the real marine data from CB area of Shengli Oilfield.
出处
《勘探地球物理进展》
2002年第3期32-36,共5页
Progress in Exploration Geophysics
基金
国家自然科学基金项目 (4 9894190 )
上海市重点学科资助项目。
