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Book Chapter

PART II: Modeling Case Histories

January 01, 1991


A high relief structure was noted on seismic data beneath a salt overhang. The prospective nature of this subsalt feature hinged upon the ability to discriminate between a structural anticline in depth and the illusion of an anticline in time. Imaging distortion brought about by: (1) velocity pull up due to the high velocity of salt; and (2) raypath bending associated with salt boundaries, complicates structural interpretation. A depth model was created from an interpreted time-migrated line to confirm the presence of a true anticline in depth. The resulting two-dimensional (2-D) synthetic seismic section compared well with the original seismic line. Finally, depth migration was performed on the original seismic data, with a result similar to that of the modeling. This result demonstrated the use of a simple modeling technique to validate a prospective exploration target.

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Geophysical Developments Series

Seismic Modeling of Geologic Structures: Applications to Exploration Problems

Stuart W. Fagin
Stuart W. Fagin
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Society of Exploration Geophysicists
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Publication date:
January 01, 1991




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