ExxonMobil has reached a final investment decision on Longtail, a gas and condensate development in the southeastern part of the Stabroek block offshore Guyana. The project is the eighth development in that part of the block. An FID marks the point at which a project moves from design and evaluation into execution, with procurement, fabrication and installation work now able to proceed.
Longtail will target non-associated gas and condensate-rich reservoirs. Non-associated gas is produced from reservoirs that hold gas in its own right rather than as a by-product of oil production, which shapes how wells, flowlines and processing are designed. Condensate, the light liquid hydrocarbon that separates from the gas at surface conditions, gives the project a second product stream alongside the gas.
Output will be handled by an FPSO designed to process 1.2 billion cubic feet of gas per day and to produce up to 250,000 barrels of condensate per day. Those figures define the scale of the processing train, compression and liquid-handling systems on the vessel, and they set the requirements for the subsea infrastructure that will tie the reservoirs back to the facility. Handling gas at that rate calls for substantial separation and compression capacity on board, while producing condensate at that level requires dedicated stabilization and storage arrangements.
In the southeastern Stabroek area, Longtail adds a gas-led project to an existing development sequence. For engineers and operators, it shows how non-associated gas can anchor a standalone offshore development, with condensate recovered as a separate liquid stream on the same floating facility. The stated capacities give contractors and equipment suppliers a clear basis for sizing topsides and subsea equipment as the project enters execution.
Source: Drilling Contractor
