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Book Chapter

Diffractions, statics, and downward continuation

January 01, 2007


Repeated acquisition experiments when the elevation of the surface is lowered to one scatterpoint

Diffraction estimation at various depths using surface measurements.

Assume the source and receiver arrays are lowered into the earth at the levels indicated on the left side of the geological model.

Sketch the seismic image on the following time sections for the appropriate depths.

Copy the zero-time energy to the corresponding depth section below.

Compare the migrated depth section with the original geology.

Note that:

the data always remains as a time section

only the top edge of the time section is copied to the migrated section

this top edge is referred to as the imaging condition.

Estimating the downward layer diffraction from the surface diffraction using vertical elevation corrections.

Generalized diffraction estimation using all possible ray path correction.

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Society of Exploration Geophysicists Course Notes

A Practical Understanding of Pre- and Poststack Migrations

John C. Bancroft, Ph.D.
John C. Bancroft, Ph.D.
University of Calgary
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Society of Exploration Geophysicists
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Publication date:
January 01, 2007




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