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A Stable Q Compensated Reverse Time Migration Method Based on Excitation Amplitude Imaging Condition

文献类型：期刊论文

作者Li, Qingqing1; Fu, Li-Yun1; Sun, Weijia2; Wei, Wei2; Hou, Wanting1
刊名COMMUNICATIONS IN COMPUTATIONAL PHYSICS
出版日期2020-07-01
卷号28期号:1页码:141-166
关键词Stable reverse time migration attenuation
ISSN号1815-2406
DOI10.4208/cicp.OA-2018-0075
英文摘要The stability and efficiency, especially the stability, are generally concerned issues in Q compensated reverse time migration (Q-RTM). The instability occurs because of the exponentially boosted high frequency ambient noise during the forward or backward seismic wavefield propagation. The regularization and low-pass filtering methods are two effective strategies to control the instability of the wave propagation in Q-RTM. However, the regularization parameters are determined experimentally, and the wavefield cannot be recovered accurately. The low-pass filtering method cannot balance the selection of cutoff frequency for varying Q values, andmay damage the effective signals, especiallywhen the signal-to-noise ratio (SNR) of the seismic data is low, the Q-RTM will be a highly unstable process. In order to achieve the purpose of stability, the selection of cutoff frequency will be small enough, which can cause great damage to the effective high frequency signals. In this paper, we present a stable Q-RTMalgorithm based on the excitation amplitude imaging condition, which can compensate both the amplitude attenuation and phase dispersion. Unlike the existing Q-RTM algorithms enlarging the amplitude, the exponentially attenuated seismic wavefield will be used during both the forward and backward wavefield propagation of Q-RTM. Therefore, the new Q- RTM algorithm is relative stable, even for the low SNR seismic data. In order to show the accuracy and stability of our stable Q-RTM algorithm clearly, an example based on Graben model will be illustrated. Then, a realistic BP gas chimney model further demonstrates that the proposed method enjoys good stability and anti-noise performance compared with the traditional Q-RTM with amplitude amplification. Compare the Q-RTMimages of these twomodels to the reference images obtained by the acoustic RTMwith acoustic seismic data, the new Q-RTM results match the reference images quite well. The proposed method is also tested using a field seismic data, the result shows the effectiveness of our proposed method.
资助项目Strategic Research Program of the Chinese Academy of Sciences[XDA14010303] ; National Natural Science Foundation of China[41930429] ; National Natural Science Foundation of China[41804123]
WOS研究方向Physics
语种英语
WOS记录号WOS:000532318100008
出版者GLOBAL SCIENCE PRESS
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 ; 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 ; 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 ; 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
源URL[http://ir.iggcas.ac.cn/handle/132A11/96714]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Li, Qingqing
作者单位1.China Univ Petr, Sch Geosci, Qingdao 266555, Shandong, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Qingqing,Fu, Li-Yun,Sun, Weijia,et al. A Stable Q Compensated Reverse Time Migration Method Based on Excitation Amplitude Imaging Condition[J]. COMMUNICATIONS IN COMPUTATIONAL PHYSICS,2020,28(1):141-166.
APA Li, Qingqing,Fu, Li-Yun,Sun, Weijia,Wei, Wei,&Hou, Wanting.(2020).A Stable Q Compensated Reverse Time Migration Method Based on Excitation Amplitude Imaging Condition.COMMUNICATIONS IN COMPUTATIONAL PHYSICS,28(1),141-166.
MLA Li, Qingqing,et al."A Stable Q Compensated Reverse Time Migration Method Based on Excitation Amplitude Imaging Condition".COMMUNICATIONS IN COMPUTATIONAL PHYSICS 28.1(2020):141-166.

入库方式： OAI收割

来源：地质与地球物理研究所

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