Optimization of the parameters in complex Padé Fourier finite-difference migration

What is it about?

Complex Padé Fourier finite-difference (FFD) migration overcomes stability problems in conventional real-valued FFD migration. Like its real counterpart, complex Padé FFD migration relies on model-dependent parameters that can be optimized to achieve the best-possible dip-angle coverage.

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Why is it important?

All one-way wave-equation migration procedures suffer from limited dip-angle coverage. Higher dips are desirable to be able to see steeply-dipping geological interfaces in the seismic image. Complex Padé FFD migration with optimized parameters is one of the few methods able to image very high dip angles of over 70 degrees.