Application of 3-D prestack depth migration for subsalt exploration in the deepwater Gulf of Mexico requires efficient interaction between geophysical imaging and geologic modeling to obtain optimum imaging quality. When this process is applied to massive 3-D seismic volumes, time and cost concerns are critical. Salt-model building through conventional 2-D vertical section interpretation is too labor-intensive and error-prone to be cost-effective. The ability to visualize a full seismic volume greatly expedites interpretation while offering insight and perspective not possible with 3-D in-line and cross-line interpretations. 3-D visualization techniques, an essential component of our technical strategy, allowed us to build velocity...

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