Dual-algorithm wavefield extrapolation applied to depth Imaging

Yanpeng Mi and Gary F. Margrave

ABSTRACT

The dual-extrapolation algorithm using large-step nonstationary wavefield extrapolators and vertical wavefield interpolation for depth imaging is reviewed. The PSPI dual-algorithm is applied to complex-structure prestack depth imaging from both flat and topographic recording surfaces. The imaging results are compared with images produced by other authors using different algorithms. It is shown that the dual-algorithm is capable of imaging very complicated structures.

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