American oil and gas multinational ExxonMobil announced on Wednesday that it made two discoveries in the Stabroek Block offshore Guyana.

The discoveries at the Tilapia-1 and Haimara-1 wells bring the total number of discoveries on the 26,800km2 Stabroek Block to 12. ExxonMobil affiliate Esso Exploration and Production Guyana is operator of the Stabroek Block, holding 45% interest in the licence.

Tilapia-1 is the fourth discovery in the Turbot area of the field, which includes the Turbot, Puma and Longtail discoveries. The Tilapia-1 discovery well was drilled to a depth of 5,726m in 1,783m of water, encountering 93m of high-quality oil-bearing sandstone reservoir.

The Noble Tom Madden drillship began drilling the Tilapia-1 well in January and will move on to drill the Yellowtail-1 well, approximately 10km west of Tilapia-1 in the Turbot area.

ExxonMobil Exploration Company president Steve Greenlee said: “We see a lot of development potential in the Turbot area and continue to prioritise exploration of high-potential prospects here.

“We expect this area to progress to a major development hub providing substantial value to Guyana, our partners and ExxonMobil.”

The Haimara-1 well was drilled to a depth of 5,575m in 1,399m of water, encountering approximately 63m of high-quality gas-condensate bearing sandstone reservoir. It is located approximately 31km east of the Pluma-1 discovery, and is a potential new area for development.

The Stena Carron drillship began drilling the well in January, and will now return to complete a well test at the Longtail discovery.

According to ExxonMobil, there is potential on the Liza prospect in the Stabroek Block for at least five floating, production storage and offloading vessels (FPSOs), which could produce more than 750,000 barrels of oil per day by 2025.

The Liza Phase 1 development is progressing on schedule and is expected to use the Liza Destiny FPSO to produce up to 120,000 barrels of oil per day in early 2020.

Liza Phase 2 is expected to start up by 2020, with sanctioning for this project and a third development expected in the first quarter of 2019.