基于平面波合成的傅里叶有限差分叠前深度偏移  

Prestack depth migration based on both plane wave synthesizing and Fourier finite difference.

作　　者：张叔伦[1] 孙沛勇[2] 

机构地区：[1]大连理工大学数学系 [2]石油地球物理勘探局研究院

出　　处：《石油地球物理勘探》1999年第1期1-7,共7页Oil Geophysical Prospecting

基　　金：国家自然科学基金;大庆石油管理局联合资助

摘　　要：本文将平面波合成的物理模型与傅里叶有限差分波场延拓算子相结合，提出了一种新的基于波场延拓的叠前深度偏移方法。采用平面波合成的物理模型，可显著提高计算效率；利用傅里叶有限差分算子可保证在复杂构造的波场延拓中，地震波场不失真，成像质量高。此外，本文对傅里叶有限差分算子作了必要的优化。Marmousi模型的试算结果验证了本文方法的正确性和优越性。A new prestack depth migration method that is based on wave field continuation has been developed by combining physical model of plane wave synthesizing with Fourier finite difference operator for wave field continuation. A physical model for plane wave synthesizing can be used to obviously improve computation efficiency. Fourier finite difference operator can be adopted to ensure good fidelity of seismic wave field in wave field continuation of complicated geology structure, bringing high quality image. In addition, Fourier finite difference operator is optimized desirably. Trial result of Marmousi model proves this method right and fine.

关 键 词：叠前深度偏移 平面波 计算 数据处理 地震数据 

分 类 号：P631.443[天文地球—地质矿产勘探]