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We develop an anisotropic plane-wave migration method based on wavefield extrapola- tion. In this new scheme, we decompose both source and receiver wavefields into plane waves by delaying shots. For each plane wave, we design a tilted coordinate system whose tilting angle depends on the propagation direction of the plane wave. The wave- field extrapolation is done by an implicit isotropic operato r plus an explicit anisotropic correction operator. We apply this method on a synthetic dataset. The results show that our scheme can accurately handle overturned waves and image steeply dipping reflectors in transversely isotropic media with a vertical axis of symmetry (VTI).

Imaging steeply dipping reflectors in TI media by wavefield extrapolation