ExxonMobil has submitted the environmental impact assessment and environmental impact statement for the proposed Longtail development offshore Guyana, a key step toward the country’s first non-associated gas project.
The documents were filed with the Environmental Protection Agency, according to a public notice. Exxon’s consultant Acorn International conducted the assessment.
Members of the public have 60 days from March 15, 2026, to review the environmental assessment and submit written comments to the EPA.
Longtail would be the eighth hydrocarbon development proposed by the Exxon-led consortium in the Stabroek Block offshore Guyana, where ExxonMobil operates alongside Hess and CNOOC.
The project is expected to produce around 1.2 billion cubic feet of natural gas per day and about 250,000 barrels per day of condensate. The development is scheduled to begin production in 2030 and is projected to operate for roughly 30 years.
During the early phase of production, most of the gas will be reinjected into the reservoir to maintain pressure and maximize condensate recovery. Volumes available for domestic use are expected to increase over time.
The US$12.5 billion project will develop the Longtail, Tripletail and Turbot discoveries made between 2017 and 2019.
Longtail is expected to integrate with Guyana’s existing and planned natural gas infrastructure, including the government’s Gas-to-Energy pipeline system.
ExxonMobil is targeting a final investment decision on the development by the end of 2026. The company must also submit a field development plan to the government ahead of that review.
