ExxonMobil has made its eighth oil discovery offshore Guyana at the Longtail-1 well, creating the potential for additional resource development in the southeast area of the Stabroek Block.
ExxonMobil encountered approximately 256 ft (78 m) of high-quality, oil-bearing sandstone reservoir. The well was safely drilled to 18,057 ft (5,504 m) depth in 6,365 ft (1,940 m) of water. The Stena Carron drillship commenced drilling on 25 May of this year.
“The Longtail discovery is in close proximity to the Turbot discovery southeast of the Liza field,” said Steve Greenlee, President of ExxonMobil Exploration Company. “Longtail drilling results are under evaluation. However, the combined estimated recoverable resources of Turbot and Longtail will exceed 500 million BOE and will contribute to the evaluation of development options in this eastern portion of the block.”
ExxonMobil is currently making plans to add a second exploration vessel offshore Guyana in addition to the Stena Carron drillship, bringing its total number of drillships on the Stabroek Block to three. The new vessel will operate in parallel to the Stena Carron to explore the block’s numerous high-value prospects.
The Noble Bob Douglas is completing initial stages of development drilling for Liza Phase 1, for which ExxonMobil announced a funding decision in 2017. Phase 1 will consist of 17 wells connected to a floating production, storage and offloading (FPSO) vessel designed to produce up to 120,000 bbl/day of oil. First oil is expected in early 2020. Phase 2 concepts are similar to Phase 1 and involve a second FPSO with production capacity of 220,000 bbl/day. A third development, Payara, is planned to follow Liza Phase 2.
Guyanese businesses, contractors and employees continue to play an important role in ExxonMobil’s operations in the country. ExxonMobil and project partners spent $24 million with more than 300 local suppliers in 2017 and opened the Centre for Local Business Development in the capital city of Georgetown to promote the establishment and growth of small- and medium-sized local businesses. ExxonMobil’s priorities in Guyana are focused on enabling local workforce and supplier development and collaborating with government to support the growth and success of its economy, both in the energy and non-energy sectors.
The Stabroek Block is 6.6 million acres (26,800 sq km). Esso Exploration and Production Guyana Limited is operator and holds 45% interest in the Stabroek Block. Hess Guyana Exploration Ltd. holds 30% interest and CNOOC Nexen Petroleum Guyana Limited holds 25% interest.