Key facts

Location: Gulf of Mexico, 130 kilometres (80 miles) off Louisiana

Depth: 2,195 metres (7,200 feet)

Interests: Shell (79% operator), Nexen Petroleum Offshore USA Inc. (21%)

Fields: Appomattox, Vicksburg

Average peak annual production: 175,000 barrels of oil equivalent

Project development

On July 1, 2015, Shell announced the final investment decision to advance the Appomattox deep-water development in the Gulf of Mexico. This decision authorises construction and installation of what will be our eighth and largest floating platform in the Gulf.

The Appomattox development will initially produce from the Appomattox and Vicksburg fields, with average peak production estimated to reach approximately 175,000 barrels of oil equivalent per day (boe/d).

Currently, we are the only operator in the Gulf of Mexico with commercial deep-water discoveries in this formation, called Norphlet, which dates back 150-200 million years to the Jurassic period.


During design work for Appomattox, we reduced the total project cost by 20% thanks in part to design improvements. These include advancements from previous four-column production hosts, such as the Olympus tension leg platform.

Shell Pipeline Company LP also made a final investment decision on the Mattox Pipeline, a 24-inch corridor pipeline that will transport crude oil from the Appomattox host to an existing offshore structure in the South Pass area and then connect onshore through an existing pipeline.

Deep-water milestones

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