Abstract

Direct arrivals are often discarded in the usual marine data processing workflows. Again application of refraction tomography is mostly applied to land data, and rarely in deep-water marine data. The following study combines these two elements into an innovative workflow designed to reposition half the shots in a vintage marine survey populated with erroneous shot coordinates on the headers. The workflow has an in-built auto-correction that precisely repositions all the incorrect shots with the desired accuracy, without affecting the correctly positioned shots. The study shows the direct impact of this process by comparing the stacks before and after the application of this workflow. The value-addition obtained in the final deliverable by this workflow is also demonstrated by comparing the reprocessed stack with a legacy output.