基于Poynting矢量的地震照明分析

发布时间：2018-06-08 01:49

本文选题：Poynting矢量 + 局部照明矩阵　；参考：《吉林大学学报(地球科学版)》2017年01期

【摘要】：地震照明分析能够定量分析影响逆时偏移成像质量的因素。文章基于Poynting矢量方法进行地震定向照明分析及成像补偿方法研究,利用Poynting矢量进行波场传播角度分解,通过计算不同入射及散射波方向的部分照明建立局部照明矩阵。该矩阵包含了照明分析中波与地质结构相互作用所涉及的所有角度信息,可以方便地分析目标附近所有可能的入射波和散射波对局部照明的贡献。根据局部照明矩阵可以获得对地下结构的照明描述、采集倾角响应,并依此进行成像补偿计算。以SEG/EAGE模型作为数值计算实例,进行基于Poynting矢量的照明分析及成像补偿,有效地提高了成像质量。该方法为角度域逆时偏移成像校正及分辨率分析等提供了高效的处理手段。
[Abstract]:Seismic illumination analysis can quantitatively analyze the factors that affect the imaging quality of inverse time migration. Based on the Poynting vector method, the seismic directional illumination analysis and the imaging compensation method are studied. The Poynting vector is used to decompose the propagation angle of the wave field, and the local illumination matrix is established by calculating the partial illumination with different incident and scattered wave directions. The matrix contains all the angle information involved in the interaction between wave and geological structure in illumination analysis, and it can conveniently analyze the contribution of all possible incident and scattered waves near the target to local illumination. According to the local illumination matrix, the illumination description of underground structure can be obtained, and the obliquity response can be collected, and the imaging compensation can be calculated accordingly. Taking the SEG / EAGE model as a numerical example, the illumination analysis and imaging compensation based on pointing vector are carried out, which can effectively improve the imaging quality. This method provides an efficient processing method for angle domain inverse time migration imaging correction and resolution analysis.
【作者单位】：东北石油大学电气信息工程学院;
【基金】：黑龙江省自然科学基金项目(2014F04)~~
【分类号】：P631.4

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