Pgs Geophysical As

Pgs Americas, Inc.

John Frier Willis

Junru Jiao

Yeashung Sonny Lin

Daniel Solano

Shu-Schung Lee

David Richard Lowrey

A method for interpreting seismic data below a salt layer includes depth migrating the seismic data to a bottom of the salt layer. The migrating including generating an initial model of velocities below the salt layer. The initial model is scaled by a plurality of scale factors at at least one image position. At least one of the plurality of scale factors for which a depth migrated image below the salt layer is optimum is selected as the scale factor.

Method for sub-salt migration velocity analysis

A method is disclosed for depth migrating seismic data. The method includes pre-stack time migrating the seismic data to form a stacked, time migrated image. The stacked, time migrated image is demigrated, and post-stack depth migration is then performed on the demigrated image. In some embodiments, the pre-stack time migration and the demigration account for ray bending in vertically transversely isotropic media.

Method for depth migrating seismic data using pre-stack time migration, demigration, and post-stack depth migration

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Houston, TX, United States of America

John Frier Willis