摘要
三维VSP正演模拟在三维VSP观测系统设计、三维VSP波场分析及三维VSP偏移成像方法研究中均有重要的作用。以三维单程波动方程为基础,采用基于正交方向加插值(ADIPI)的傅里叶有限差分(FFD)算子,实现了三维VSP正演模拟。克服了对三维算子的双向正交分裂所导致的方位各向异性误差,既保证了模拟精度,又提高了计算效率,还可根据实际需要单独模拟上行波或下行波。模型试验结果证明了方法的有效性。
3D VSP forward modeling plays an important role in the study of 3D VSP survey design,3D VSP wave field analysis and 3D VSP migration.Based on 3D one-way wave equation,we used Fourier finite-difference（FFD） operator based on ADI plus interpolation（ADIPI）,achieved 3D VSP forward modeling and avoided the azimuthal anisotropy error resulted from two-way splitting in 3D situation.This mothed can not only improve computation efficiency and ensure the modeling precision,but also simulate pure upward wave or downward wave according to the situation.The modeling test results verified the feasibility and efficiency of the proposed method.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2011年第5期59-62,共4页
Coal Geology & Exploration
基金
国家科技重大专项课题(2008ZX05024-01)
