Effective Q-compensated reverse time migration using new decoupled fractional Laplacian viscoacoustic wave equation
文献类型：期刊论文
| 作者 | Li, Qingqing1; Fu, Li-Yun1; Zhou, Hui2; Wei, Wei3; Hou, Wanting1 |
| 刊名 | GEOPHYSICS
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 84期号:2页码:S57-S69 |
| ISSN号 | 0016-8033 |
| DOI | 10.1190/GEO2017-0748.1 |
| 英文摘要 | Seismic 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. |
| WOS关键词 | PRESTACK DEPTH MIGRATION |
| 资助项目 | Strategic Research Program of the Chinese Academy of Sciences[XDA14010303] ; National Natural Science Foundation of China[41630314] ; China Postdoctoral Science Foundation[2017M622312] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000462613600005 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | 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 ; 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 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/91083]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Fu, Li-Yun |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
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