Editor's note: The other two parts of this study—titled “Dipping salt bodies, asymmetry of amplitude response and salt peaks” and “Salt ridges and furrows, shooting orientation of acquisition”—will be published in the July and August issues of TLE.

Advances in seismic technology, particularly 3-D prestack depth migration (PreSDM), were crucial to providing reliable seismic images below salt sheets. These improved seismic images allowed discovery and development of numerous fields in the Gulf of Mexico. Figures 1 and 2 illustrate the difference in imaging and interpretability between 3-D poststack time migration and 3-D prestack depth migration. There remains, however, a...

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