A model study of three-dimensional viscoacoustic least-squares reverse time migration
Jin-Li LI1,2, Ying-Ming QU3,4, Jian-Xun LIU1,2, Zhen-Chun LI3, Kai WANG1,2, Bo YU5
1. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China 2. National Center for Geological Exploration Technology,Langfang 065000,China 3. School of Geosciences,China University of Petroleum (East China),Qingdao 266580,China 4. SINOPEC Key Laboratory of Geophysics,Nanjing 211030,China 5. PetroChina Oil and Gas Pipeline Control Center,China National Petroleum Corporation,Beijing 100007,China;
In view of the problem of viscous imaging and the advantage of least-squares reverse time migration (LSRTM),a 3D 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 3D 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 3D 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 3D flat model and salt dome model with Q proves the accuracy of the proposed 3D viscoacoustic LSRTM.
李金丽, 曲英铭, 刘建勋, 李振春, 王凯, 于博. 三维黏声最小二乘逆时偏移方法模型研究[J]. 物探与化探, 2018, 42(5): 1013-1025.
Jin-Li LI, Ying-Ming QU, Jian-Xun LIU, Zhen-Chun LI, Kai WANG, Bo YU. A model study of three-dimensional viscoacoustic least-squares reverse time migration. Geophysical and Geochemical Exploration, 2018, 42(5): 1013-1025.
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