L17_SeismicReflectionIV-page2

L17_SeismicReflectionIV-page2 - Curved interfaces...

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Applied Geophysics – Seismic reflection IV Dipping layers For horizontal reflectors the reflection point is vertically below the source/receiver For dipping layers the reflection comes from a point up dip Therefore, a traveltime section will always show a reduced dip δ sin ' tan = Applied Geophysics – Seismic reflection IV Migration Intended to deal with • Dipping interfaces
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Unformatted text preview: Curved interfaces Diffractions Reflections from the 3 rd dimension The process of trying to move reflections back to their point of origin Time migration: restore the geometrical relationships between seismic events on the time section Depth migration: generates a true depth section. Necessary when strong lateral velocity gradients...
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