Guyana: ExxonMobil advances next phase of Guyana development with Longtail
ExxonMobil received approval for the Longtail project in Guyana, planning a $12.5B investment. The project, targeting 2030 startup, aims to produce 1.2B scf/d of gas and 250K bpd of condensate. ExxonMobil operates the Stabroek block with partners Hess and CNOOC.
How this was made
The 30-second read
Why it matters
The FID confirms a $12.5 bn capital commitment, expanding long‑term reserve base and future cash flow for all partners.
Market read
First‑report of a major offshore development that could reshape Guyana’s gas supply and benefit three listed oil majors.
What to watch
Potential regulatory, financing, or infrastructure constraints in Guyana could affect project economics.
Background
ExxonMobil’s Stabroek block already produces ~900,000 bpd oil; Longtail is the fifth project, targeting 1.2 bcf/d gas and 250,000 bpd condensate.
Ticker impact
ExxonMobil announced a final investment decision and $12.5 bn spend for the Longtail offshore Guyana project, a new development phase.
potential modest upside as investors price in long‑term reserve growth, but limited near‑term move.
The FID is a primary, material disclosure for a large‑cap oil major; the scale of investment and future production are new information.
Market effects
Boosts the offshore oil & gas sector outlook, especially Guyana assets.
Strengthens investor sentiment toward Caribbean energy projects.
Adds to global gas supply expectations, modestly influencing energy commodity outlook.
Counterpoint
Long lead time and execution risk could delay or curtail expected benefits, limiting near‑term stock reaction.
Key entities
- CompanyExxonMobil
Operator of the Longtail project with 45% stake.
- CompanyHess
30% partner in the Stabroek block.
- CompanyCNOOC
25% partner in the Stabroek block.





