Abstract
Wavefield reconstruction inversion (WRI) is an improved full waveform inversion theory that has been proposed in recent years. WRI method expands the searching space by introducing the wave equation into the objective function and reconstructing the wavefield to update model parameters, thereby improving the computing efficiency and mitigating the influence of the local minimum. However, frequency-domain WRI is difficult to apply to real seismic data because of the high computational memory demand and requirement of time-frequency transformation with additional computational costs. In this paper, wavefield reconstruction inversion theory is extended into the time domain, the augmented wave equation of WRI is derived in the time domain, and the model gradient is modified according to the numerical test with anomalies. The examples of synthetic data illustrate the accuracy of time-domain WRI and the low dependency of WRI on low-frequency information.
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Acknowledgments
We are grateful to SWPI laboratory staff for their support and providing use of Matlab software. We also wish to thank Zhang Hua and Yuan San-Yi for their constructive comments.
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This work was supported by the National Natural Science Foundation of China (Nos. 41374122 and 41504100).
Professor Li Zhen-Chun obtained an M.S. in Applied Geophysics in 1991 from the China University of Petroleum (East China) and a Ph.D. in Geophysics in 2000 from Tongji University. He currently works at the School of Geosciences of China University of Petroleum (East China). His main research interests are seismic modeling and imaging.
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Li, ZC., Lin, YZ., Zhang, K. et al. Time-domain wavefield reconstruction inversion. Appl. Geophys. 14, 523–528 (2017). https://doi.org/10.1007/s11770-017-0629-6
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DOI: https://doi.org/10.1007/s11770-017-0629-6