Deep-Shelf and ultra-deep well challenges ///

Offshore drilling continues to be very challenging and cost intensive, where $50-million wells are not uncommon. This article discusses deep-shelf drilling and completion challenges. It reviews two active areas for Anadarko Petroleum Corp. – Grand Island (GI) 116 “Hickory” Shelf subsalt field at a water depth of 328 ft, and Green Canyon 518 deepwater subsalt field at a water depth of »4,000 ft. It also shows a number of other fields Anadarko has been working for the last 10 years. Almost all of these fields have wells drilled to depths below 15,000 ft. They all had to deal with multiple casing strings, depleted sands and demanding directional solutions to connect multiple stacked pay sands.

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