三维黏声最小二乘逆时偏移方法模型研究  

A model study of three-dimensional viscoacoustic least-squares reverse time migration

作　　者：李金丽[1,2] 曲英铭 刘建勋 李振春[3] 王凯 于博[5] LI Jin-Li;QU Ying-Ming;LIU Jian-Xun;LI Zhen-Chun;WANG Kai;YU Bo(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China;National Center for Geolog-ical Exploration Technology,Langfang 065000,China;School of Geosciences,China University of Petroleum（East China）,Qingdao 266580,China;SINOPEC Key Laboratory of Geophysics,Nanjing 211030,China;PetroChina Oil and Gas Pipeline Control Center,China National Petroleum Corpora-tion,Beijing 100007,China)

机构地区：[1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [2]国家现代地质勘查技术研究中心,河北廊坊065000 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [4]中国石化地球物理重点实验室,江苏南京211030 [5]中国石油天然气集团公司北京油气调控中心,北京100007

出　　处：《物探与化探》2018年第5期1013-1025,共13页Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质调查项目(DD20160224;DD20160164);中央级公益性科研院所基本科研业务费专项资金资助项目(AS2017J11)

摘　　要：针对黏介质成像存在的问题及最小二乘逆时偏移方法的优势,通过广义标准线性固体(GSLS)的三维黏声波动方程,基于三维黏声波动方程的伴随算子及最小二乘逆时偏移框架,实现了三维黏声最小二乘逆时偏移方法。采用极性编码技术大幅度降低黏声最小二乘逆时偏移算法的计算量与内存,使三维黏声最小二乘逆时偏移算法的实用化成为可能。在模型试算部分,首先通过Marmousi模型验证了该方法对传统声波最小二乘逆时偏移方法的优势,最后对三维含Q平层模型及盐丘模型进行试算,证明了三维黏声最小二乘逆时偏移算法的正确性。In view of the problem of viscous imaging and the advantage of least-squares reverse time migration（ LSRTM）,a 3 D viscoacoustic LSRTM method is proposed by using the viscoacoustic wave equation of the General Standard Linear Solid（ GSLS）,which is based on the adjoint operator of the 3 D viscoacoustic wave equation and the frame of LSRTM.The polar encoding technology is used to dramatically decrease the computational cost and memory storage of the 3 D viscoacoustic LSRTM,which can make it possible to be practical.In the numerical examples,the authors firstly verify the advantage of the proposed method over the traditional acoustic LSRTM using the Marmousi model.Finally,the test of the 3 D flat model and salt dome model with Q proves the accuracy of the proposed 3 D viscoacoustic LSRTM.

关 键 词：三维 黏声介质 最小二乘逆时偏移 伴随算子 相位编码 

分 类 号：P631.4[天文地球—地质矿产勘探]