Broadband seismic illumination and resolution analyses based on staining algorithm  

基于染色算法的宽频带地震照明及分辨率分析（英文）

作　　者：Chen Bo Jia Xiao-Feng Xie Xiao-Bi 陈波;贾晓峰;谢小碧(中国科学技术大学地球和空间科学学院地震与地球内部物理实验室,合肥230026;加州大学圣克鲁斯地球物理及行星物理研究所,美国加州95064;地球科学与地质工程学院,中山大学,广州510275)

机构地区：[1]University of Science and Technology of China, School of Earth and Space Sciences, Laboratory of Seismology and Physics of Earth＇s Interior, Hefei Anhui 230026, China [2]Institute of Geophysics and Planetary Physics, University of California at Santa Cruz, CA 95064, U.S.A [3]School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China.

出　　处：《Applied Geophysics》2016年第3期480-490,579,580,共13页应用地球物理（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.41374006 and 41274117)

摘　　要：Seismic migration moves reflections to their true subsurface positions and yields seismic images of subsurface areas. However, due to limited acquisition aperture, complex overburden structure and target dipping angle, the migration often generates a distorted image of the actual subsurface structure. Seismic illumination and resolution analyses provide a quantitative description of how the above-mentioned factors distort the image. The point spread function （PSF） gives the resolution of the depth image and carries full information about the factors affecting the quality of the image. The staining algorithm establishes a correspondence between a certain structure and its relevant wavefield and reflected data. In this paper, we use the staining algorithm to calculate the PSFs, then use these PSFs for extracting the acquisition dip response and correcting the original depth image by deconvolution. We present relevant results of the SEG salt model. The staining algorithm provides an efficient tool for calculating the PSF and for conducting broadband seismic illumination and resolution analyses.偏移成像是将由地下目标产生的地震数据归位到反射界面从而产生地下结构的像。但由于受到采集系统孔径、复杂上覆介质和成像目标倾角等因素的影响,成像结果常常是地下结构的畸变了的像。地震照明和分辨率分析为上述因素对地震成像结果的影响提供了定量的描述方法。点弥散函数中包含地震照明和分辨率分析的全部信息。染色算法建立地下某一特定结构与地震波场和地震数据之间的对应关系。本文利用染色算法计算点弥散函数并进一步获得角度域照明信息,同时通过点弥散函数与原始成像结果反卷积的方法对成像结果予以校正。展示了SEG盐丘模型的相关计算结果。染色算法为点弥散函数的计算及进行宽频带地震照明与分辨率分析提供了一种高效的计算工具。

关 键 词：Staining algorithm Point spreading function Acquisition dip response Seismic resolution 

分 类 号：P631.4[天文地球—地质矿产勘探]