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An explicit stabilization scheme for Q-compensated reverse time migration
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DOI：10.1190/geo2021-0134.1.png)
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requires nonphysical frequency-dependent energy amplification, which may lead to numerical instability. An explicit stabilization approach is developed for seismic Q compensation after deriving the k-space Green's function of the compensated constant-Q wave equation, which has decoupled fractional Laplacians. At high wavenumbers, as time increases, the time propagator of k-space Green's function increases exponentially. Therefore, an exponential window function is introduced to stabilize the exponentially divergent time propagator. Unlike the conventional low-pass filtering approach in the frequency or wavenumber domain, the proposed method assumes that the exponent of the chosen window is
Keyword:
ATTENUATION COMPENSATION
ADAPTIVE STABILIZATION
WAVE-PROPAGATION
期刊
IF:
3.2
论文数:
8.4K
被引数:
3.3W
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Comparison of two viscoacoustic propagators for Q-compensated reverse time migration.png)
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