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OALib Journal期刊
ISSN: 2333-9721
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基于伪谱法的复杂构造模型双程波地震照明模拟
Keywords: 地震照明,复杂构造,伪谱法,波场外推,观测系统优化
Abstract:
？面向复杂构造目标的地震照明分析对采集观测系统的优化设计具有重要的指导意义。照明分析方法中以双程波波动方程法在理论上更具优势。但常用的双程波波动方程有限差分方法受计算精度和计算效率的限制。本文将基于伪谱法的波场外推算子应用于双程波地震照明的计算中，通过简单透镜体模型试算表明，伪谱法双程波照明能够有效地克服数值频散现象，同时不受传播角度的限制，计算的地震波场照明能量精度高、波场信息丰富。将该方法用于marmousi模型的照明模拟和分析，结果表明基于伪谱法的双程波地震照明模拟能够适应强烈的横向速度变化。利用波场上传法、地面源照明分析，能够对复杂构造目标的采集观测系统进行评价和优化。
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