Key facts

Location: Gulf of Mexico, USA

Depth: 914 metres (3,000 feet)

Interests: Shell (71.5%, operator) and BP (28.5%)

Field: Mars

Design capacity: 100,000 bbl/d

Shell’s Mars B development is the first deep-water project in the US Gulf of Mexico to expand an existing offshore oil and gas field with significant new infrastructure. This should extend the life of the greater Mars basin to 2050 or beyond.

First oil production from Mars B began in February 2014 through Olympus, Shell’s seventh, and largest, floating deep-water platform in the Gulf of Mexico.

In addition to the Olympus drilling and production platform, the Shell Mars B development includes subsea wells at the West Boreas and South Deimos fields, export pipelines, and a shallow-water platform located near the Louisiana coast.

Olympus is located in about 914 metres (3,000 feet) of water.

The Mars field has been one of Shell’s most important fields over the past 20 years. When we discovered the field in 1989, we estimated that it would have nearly 700 million barrels of oil equivalent (boe) of resources. To date the field has produced more than 850 million boe.

Environment and society

During the project’s development and operations, Mars B will generate opportunities for the Gulf of Mexico region through the creation of jobs, revenues and better infrastructure.

Shell is also investing $5 million in community and environmental initiatives, partnering with groups that include The Nature Conservancy, Barataria-Terrebonne National Estuary Program, and LA-1 Coalition.

Deep-water milestones

More in about us


We have taken the final investment decision to move ahead with the Appomattox deep-water project in the Gulf of Mexico, the latest of our deep-water developments.


Stones, in the US Gulf of Mexico, is the world’s deepest oil and gas project, operating in around 2,900 metres of water.

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