• Gross discovered recoverable resource estimate for Stabroek Block increased to approximately 10 billion barrels of oil equivalent
• Cataback is the 21st significant discovery on the block
• Recent discoveries further enhance the development potential of the Stabroek Block

Hess Corporation today announced an increase in the gross discovered recoverable resource estimate for the Stabroek Block offshore Guyana to approximately 10 billion barrels of oil equivalent, up from the previous estimate of more than 9 billion barrels of oil equivalent.

The updated resource estimate includes another significant discovery on the Stabroek Block at the Cataback well. The well encountered 243 feet (74 meters) of net pay in high quality hydrocarbon bearing sandstone reservoirs of which 102 feet (31 meters) is oil bearing. Cataback is located approximately 3.7 miles (6 kilometers) east of Turbot-1 and was drilled in 5,928 feet (1,807 meters) of water by the Noble Tom Madden.

CEO John Hess said: 
“We are pleased that Cataback is our 21st significant discovery on the Stabroek Block and further underpins the potential for future developments. We continue to see multibillion barrels of additional exploration potential remaining on the block.”

The Stabroek Block is 6.6 million acres (26,800 square kilometers). ExxonMobil affiliate Esso Exploration and Production Guyana Limited is operator and holds 45 percent interest in the Stabroek Block. Hess Guyana Exploration Ltd. holds 30 percent interest and CNOOC Petroleum Guyana Limited holds 25 percent interest.

KeyFacts Energy Guyana company/country profiles: ExxonMobil   l   Hess   l   CNOOC International