Deepwater subsalt discoveries along the Sigsbee Escarpment in the Gulf of Mexico are approaching 10 years old. Some of these fields have begun production, and as we have drilled more wells into the subsalt we have learned that there are still uncertainties in our structural maps. Distortions due to salt overburden and noise from multiples reduce our ability to accurately map structures and the detailed faulting which is required for optimal production of these fields. The industry needs to find better ways to use seismic data to reduce our subsurface uncertainty. This article is a case study of the progress made at the BP-operated Mad Dog Field.

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