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.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
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
关键词
叠前深度偏移
平面波
计算
数据处理
地震数据
prestack depth migration, plane wave, Fourier finite differenceoperator, wave field continuation, Marmousi model
