Wave Equation Prestack Depth Migration Method in 3D VTI Media

详细信息   

• 责任者：Liu Linong (Key Laboratory of Petroleum Resources Research ; Institute of Geology and Geophysics Chinese Academy of Sciences ; Beijing 100029 ; China) ; Zhang Jianfeng
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(11)
• 关键词：地震勘探 ; seismic exploration ; 叠前深度偏移 ; prestack depth migration ; 波动方程 ; wave equation
• 页码：p.2906-2915
• 图表：6 illus., 19 refs.
• 分类号：1600
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

The resulting 3D VTI wave equation prestack migration algorithm can accommodate  a wide range of anisotropy rather than the weak anisotropy. For its practical aspects, the authors present a frequency-dependent varying-step depth extrapolation scheme for reducing the computational cost of wavefield depth extrapolation and an anti-alias one-way propagator aiming at imaging the steep dipped structures with 3D sparsely sampling dataset in 3D VTI media. The proposed 3D VTI wave equation prestack migration scheme is demonstrated by SEG 2D Hess VTI dataset and a 3D migration impulse response with its layout resulting from the 3D field data.