Abstract
Depth conversion and depth imaging (depth migration) of 3-D seismic data require a geologically and geophysically competent velocity model. The constantly improving quality of seismic data and increasing survey accuracy demand a correspondingly high quality and accuracy standard for velocity models. In depth conversion of time‐based maps, for example, using a single regional velocity function is rapidly being replaced by depth conversion of both the interpreted surfaces and the seismic data using a single unified high quality 3-D velocity model.
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