IGGCAS OpenIR
Effective Q-compensated reverse time migration using new decoupled fractional Laplacian viscoacoustic wave equation
Li, Qingqing1; Fu, Li-Yun1; Zhou, Hui2; Wei, Wei3; Hou, Wanting1
2019-03-01
Source PublicationGEOPHYSICS
ISSN0016-8033
Volume84Issue:2Pages:S57-S69
AbstractSeismic waves are attenuated and distorted during propagation because of the conversion of acoustic energy to heat energy. We focus on intrinsic attenuation, which is caused by Q, which is the portion of energy lost during each cycle or wavelength. Amplitude attenuation can decrease the energy of the wavefields, and dispersion effects distort the phase of seismic waves. Attenuation and dispersion effects can reduce the resolution of image, and they can especially distort the real position of interfaces. On the basis of the viscoacoustic wave equation consisting of a single standard linear solid, we have derived a new viscoacoustic wave equation with decoupled amplitude attenuation and phase dispersion. Subsequently, we adopt a theoretical framework of viscoacoustic reverse time migration that can compensate the amplitude loss and the phase dispersion. Compared with the other variable fractional Laplacian viscoacoustic wave equations with decoupled amplitude attenuation and phase dispersion terms, the order of the Laplacian operator in our equation is a constant. The amplitude attenuation term is solved by pseudospectral method. and only one fast Fourier transform is required in each time step. The phase dispersion term can be computed using a finite-difference method. Numerical examples prove that our equation can accurately simulate the attenuation effects very well. Simulation of the new viscoacoustic equation indicates high efficiency because only one constant fractional Laplacian operator exists in this new viscoacoustic wave equation, which can reduce the number of inverse Fourier transforms to improve the computation efficiency of forward modeling and Q-compensated reverse time migration (Q-RTM). We tested the Q-RTM by using Marmousi and BP gas models and compared the Q-RTM images with those without compensation and attenuation (the reference image). Q-RTM results match well with the reference images. We also compared the field data migration images with and without compensation. Results demonstrate the accuracy and efficiency of the presented new viscoacoustic wave equation.
DOI10.1190/GEO2017-0748.1
Funding OrganizationStrategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS KeywordPRESTACK DEPTH MIGRATION
Language英语
Funding ProjectStrategic Research Program of the Chinese Academy of Sciences[XDA14010303] ; National Natural Science Foundation of China[41630314] ; China Postdoctoral Science Foundation[2017M622312]
Funding OrganizationStrategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Strategic Research Program of the Chinese Academy of Sciences ; Strategic Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000462613600005
PublisherSOC EXPLORATION GEOPHYSICISTS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/91083
Collection中国科学院地质与地球物理研究所
Corresponding AuthorFu, Li-Yun
Affiliation1.China Univ Petr, Qingdao, Peoples R China
2.China Univ Petr, State Key Lab Petr Resources & Prospecting, CNPC Key Lab Geophys Prospecting, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Li, Qingqing,Fu, Li-Yun,Zhou, Hui,et al. Effective Q-compensated reverse time migration using new decoupled fractional Laplacian viscoacoustic wave equation[J]. GEOPHYSICS,2019,84(2):S57-S69.
APA Li, Qingqing,Fu, Li-Yun,Zhou, Hui,Wei, Wei,&Hou, Wanting.(2019).Effective Q-compensated reverse time migration using new decoupled fractional Laplacian viscoacoustic wave equation.GEOPHYSICS,84(2),S57-S69.
MLA Li, Qingqing,et al."Effective Q-compensated reverse time migration using new decoupled fractional Laplacian viscoacoustic wave equation".GEOPHYSICS 84.2(2019):S57-S69.
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