Tullow and Shell will pursue and evaluate transformational geological plays in underexplored frontier basins. This partnership combines the knowledge base and specialist capabilities of both companies to allow more effective de-risking and development in areas of mutual interest, according to Tullow.

In September 2011, Shell, as part of a Tullow-operated joint venture, confirmed a deepwater oil discovery in the Guyane Maritime permit approximately 150 kilometers offshore French Guiana. The GM-ES-1 well is being drilled in a water depth of more than 2,000 meters (6,562 feet) and to date has drilled to a depth of 5,711 meters (18,737 feet). (Earlier post.)