波动方程地震定向照明分析

Analysis on wave equation seismic directional illumination

本文从地震波能量理论出发,提出了基于玻印亭矢量的地震波场方向性分解方法和地震波定向照明度计算方法。根据声波方程高精度正演模拟,计算出声波波场的能量密度矢量和能量传播方向,并通过角域滤波器实现对波场的方向性分解;进而基于方向性分解后的波场,可以计算出震源定向照明度和源—检定向照明度。数值模型试验结果表明:该法计算精度高且速度快,具有非常良好的实用性;定向照明可以用于定量分析地震采集参数对成像质量的影响;目标层CRP点照明角分布可用于地震分辨率分析。

Starting from the theory of seismic wave energy,the paper presented seismic wavefield directional decomposition method based on Poynting vector and computational method of seismic wave directional illumination.The energy density vector and energy propagation direction are computed on the basis of high-precision forward simulation of acoustic wave equation,the directional decomposition of wavefield is implemented by filter in angle domain,and the source and source-receiver directional illumination can be fur...