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• W3005666978 endingPage "S183" @default.
• W3005666978 startingPage "S169" @default.
• W3005666978 abstract "Reverse time migration with [Formula: see text] compensation ([Formula: see text]-RTM) is an effective approach to enhance the resolution of seismic images because it retrieves the amplitude loss and phase distortion induced by the viscosity of media. According to the crosscorrelation imaging condition, [Formula: see text]-RTM requires compensation for the amplitude loss in the propagation paths of source and receiver wavefields, which can be realized by solving an amplitude-boosted wave equation. However, the amplitude-boosted simulations suffer from numerical instability due to the amplification of high-frequency noise. We have developed a robust stabilization strategy for [Formula: see text]-RTM by incorporating a time-variant filter into the amplitude-boosted wavefield extrapolation step. We modify the Fourier spectrum of the operator that controls the amplitude compensation to be time variant, and we add to the spectrum a stabilization factor. Doing so, we integrate the time-variant filter into the viscoacoustic wave propagator implicitly, and we avoid any explicit filtering operation in [Formula: see text]-RTM. We verify the robustness of this stabilized [Formula: see text]-RTM with two synthetic data examples. We also apply this technique to a field data set to demonstrate the imaging improvements compared to an acoustic RTM and a more traditional [Formula: see text]-RTM method." @default.
• W3005666978 created "2020-02-24" @default.
• W3005666978 creator A5019958102 @default.
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• W3005666978 date "2020-05-01" @default.
• W3005666978 modified "2023-10-11" @default.
• W3005666978 title "An implicit stabilization strategy for <i>Q</i>-compensated reverse time migration" @default.
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• W3005666978 doi "https://doi.org/10.1190/geo2019-0235.1" @default.
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