ExxonMobil Guyana Limited is continuing exploration drilling at the Ranger-3 well site at the Stabroek Block, according to a notice from the Maritime Administration Department.
Drilling activities, carried out by the Stena Carron, began on September 8, and are scheduled to conclude on December 31, 2025.
Ranger still holds ranking as Exxon’s deepest well drilled in Guyana’s Stabroek Block | OilNOW
The Ranger-3 site is located about 136.69 nautical miles (253.16 kilometers) off Guyana’s coast and covers an area of one square kilometer. Ranger was first discovered in 2018, marking Exxon’s sixth find in the block and its deepest that year, positioned some 60 miles northwest of the Liza field.
Initial estimates from Rystad Energy in 2018 placed Ranger’s potential at 346 million barrels of oil, a figure revised to 432 million in 2022. Later that year, S&P Global Platts further lifted the estimate to between 500 and 600 million barrels.
Ranger is located in a carbonate play, a reservoir type known for being more porous and chemically active than sandstone formations. These rocks are formed in marine environments and made up largely of marine organism fragments, coral, algae, and skeletons.
Exxon signaled its intention to test the discovery, with its Guyana country President, Alistair Routledge, noting in 2023 that Ranger was considered relatively small and not particularly economical as a standalone development.
