The stability problem of reverse time migration for viscoacoustic VTI media

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Abstract In real strata anisotropy and viscosity extensively exists. They degraded waveforms in amplitude, resulting in which reducing of image resolution. To obtain high-precision imaging of deep reservoirs, we extended the separated viscous and anisotropic reverse time migration (RTM) to a stable viscoacoustic anisotropic RTM for vertical transverse isotropic (VTI) media, based on single generalized standard and linear solid (GSLS) media theory.. We used a pseudo-spectral method to develop the numerical simulation. By introducing a regularization operator to eliminate the high-frequency instability problem, we built a stable inverse propagator and achieved viscoacoustic VTI media RTM. High-resolution imaging results were obtained after correcting for the effects of anisotropy and viscosity. Synthetic tests verify the validity and accuracy of algorithm.

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Key words： Viscoacoustic vertical transverse isotropic VTI medium Pseudo-differential equations Reverse-time propagator Reverse-time migration

Received: 2016-03-05;

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Research is sponsored by the National Natural Science Fund (No. 41274117), the National Natural Science Fund (No. 41574098), and Sinopec Geophysical Key Laboratory Open Fund (No. wtyjy-wx2016-04-2).

Cite this article:

. The stability problem of reverse time migration for viscoacoustic VTI media[J]. APPLIED GEOPHYSICS, 2016, 13(4): 608-613.

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