角度域各向异性高斯束逆时偏移  

Angle domain reverse time migration with Gaussian beams in anisotropic media

作　　者：张凯[1] 段新意 李振春[1] 黄建平[1] 张晴[2] 李娜[3] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]辽河油田勘探开发研究院,辽宁盘锦124010 [3]中原油田物探研究院,河南濮阳457001

出　　处：《石油地球物理勘探》2015年第5期912-918,804-805,共7页Oil Geophysical Prospecting

摘　　要：通过引入经典弹性参数表征的各向异性介质运动学和动力学射线追踪体系,结合高斯束传播过程中角度信息的计算提出了基于格林函数的角度域各向异性高斯束逆时偏移方法。通过对国际通用模型数据及实际资料进行测试表明:本文方法具有对各向异性介质进行精确成像的能力,在低信噪比及复杂构造地区成像效果明显优于Kirchhoff叠前深度偏移。Based on Green function we propose in this paper a new method of the angle domain reverse time migration with Gaussian beams in anisotropic media.This method introduces the kinematic and dynamic ray tracing systems with classic elastic parameters in anisotropic media,and combines with the computation of the angle information in Gaussian beams propagation process.Test results on international standard model data and real data show that the proposed method can accurately image anisotropic media,and obtain better imaging in low S/N and complex structures than Kirchhoff prestack depth migration.

关 键 词：各向异性 高斯束 格林函数 射线追踪 共成像点道集 

分 类 号：P631[天文地球—地质矿产勘探]