ExxonMobil is advancing four Stabroek Block projects that would follow the Uaru development and its Errea Wittu floating production, storage and offloading vessel (FPSO).
Whiptail is expected to begin production in 2027, followed by Hammerhead in 2029. ExxonMobil is also pursuing the Longtail gas and condensate development for 2030 and evaluating Haimara as the foundation for a ninth offshore project.
The projects would expand Guyana’s oil production capacity and support the development of its offshore gas resources.
Whiptail is ExxonMobil’s sixth approved Stabroek Block development. The US$12.7 billion project is expected to begin production by the end of 2027. Its Jaguar FPSO is being constructed by SBM Offshore. The vessel will use the company’s Fast4Ward multipurpose hull design and produce up to 250,000 barrels of oil per day (b/d).
Whiptail will comprise up to 10 drill centers and 48 production and injection wells. The wells will be connected to Jaguar through subsea infrastructure. The project is targeting more than 850 million barrels of oil.
Work is progressing on the project’s offshore installation campaign. ExxonMobil selected Sercel’s Marlin software to help coordinate vessel movements, pipelay work and mooring installation during simultaneous operations.
Hammerhead, the seventh sanctioned development, is scheduled to begin production in the second quarter of 2029. Guyana approved the US$6.8 billion project and issued its production license in September 2025.
MODEC is constructing the Essequibo 1899 FPSO by converting a very large crude carrier. The vessel will be designed to produce approximately 150,000 b/d and process 90 million cubic feet of gas per day.
The development will use 10 production wells and eight injection wells. Approximately 445 million barrels of oil are expected to be produced.
Hammerhead’s associated gas could first support operations aboard the FPSO. Remaining volumes could be delivered to shore through the Gas-to-Energy pipeline, connected to future infrastructure serving Berbice or transferred to the Unity FPSO to support production from the Liza field.
Longtail will be a shift toward large-scale gas and condensate production. The proposed eighth Stabroek Block development is expected to produce up to 1.2 billion cubic feet of gas per day and about 250,000 barrels of condensate per day.
ExxonMobil plans to begin production in 2030, subject to government approval and a final investment decision. The project is expected to operate for approximately 30 years.
SBM Offshore received front-end engineering and design contracts for the Longtail FPSO. The company also allocated a Fast4Ward hull for the development. Construction and installation remain subject to project approvals and ExxonMobil’s investment decision.
Longtail will anchor several discoveries in the southeastern section of the Stabroek Block. ExxonMobil refers to the area extending from Longtail to Haimara as the southeast gas area.
Haimara is being considered as the anchor for a ninth development. ExxonMobil Chairman and Chief Executive Officer Darren Woods said the company sees an opportunity to replicate the Longtail concept for that project.
“One of the things that we now see an opportunity for is this ninth FPSO, and really take advantage of what we’ve done with Longtail to replicate that and get some significant capital advantages to apply,” Woods said.
The ninth project has not been finalized. ExxonMobil operates the Stabroek Block with a 45% interest. Hess, which is owned by Chevron, holds 30%, while CNOOC holds 25%.
