Optimizing the casing program is one of the most critical factors in well design for deepwater applications. Conventional design often dictates that very large surface casing be used to allow passage of a high number of subsequent casing strings telescoping down in size that are required to...
Challenge: Redevelop an established Gulf of Mexico deepwater field by accessing additional reserves.
A Norwegian Sea Operator was unable to drill into a depleted reservoir with a planned 12-1/4 in. BHA, which left a short section of shale cap rock that needed to be isolated to enable use of water-based mud as the reservoir drill fluid.