A major offshore gas discovery has been made by Kosmos Energy that looks likely to contain reserves greater than 20 trillion cubic feet.
Texas based Kosmos Energy made the discovery, with the offshore drillship Atwood Achiever, whilst exploring offshore Senegal.
Kosmos announced the news Wednesday 27th saying: “We are pleased to have delivered another major discovery with our first exploration well offshore Senegal.”
Offshore Gas Discovery
The Guembeul-1 offshore gas discovery is part of Kosmos Energy’s wider exploration of an area located due north of Senegalese capital Dakar. The firm is officially calling the the offshore discovery ‘significant’.
Kosmos stated that they now believe the wider Tortue reservoir formation, which includes Guembeul-1, holds reserves in the region of 11 trillion cubic feet (Tcf).
They have also been more bullish with their estimations of gas reserves across the entire complex, upping them form 15 Tcf to 17 Tcf, although further exploration wells over wider area are yet to be drilled.
The remaining wells are likely to tip the gross reserves north of 20 trillion cubic feet of natural gas bringing it further towards ENI’s giant Zohr gas discovery that came in at 30 trillion cubic feet last year.
Commenting on the news Kosmos Energy CEO, Andrew G. Inglis, said: “Guembeul-1 confirms the presence of a world class gas resource that extends into both Senegal and Mauritania.”
“With our successful appraisal program and support of both governments, the initial gas development is gaining momentum,”
“The Guembeul-1 well continues our 100% success rate in the outboard Cretaceous petroleum system offshore Senegal and Mauritania, which we believe is a strategically important new oil and gas province and we are focused on unlocking the basin’s full potential.”
Guembeul-1 was drilled by the Atwood Achiever drillship in a water depth of 8,858 feet (2,700m) and a total well depth of 17,208 feet (5,245m), with the well encountering a net gas pay of 331 feet (101m).
Kosmos Energy Senegal
The Guembeul-1 is part of a joint venture between Kosmos Energy 60%; Timis Corporation Limited 30%; and Petrosen 10%.
Under the terms of the Senegal offshore licence, Kosmos are entitled to explore the area offshore St Louis, with a Senegal Government production sharing agreement coming in to force when production starts.
The Atwood Achiever deepwater drillship, delivered in 2014 by Daewoo Shipbuilding & Marine Engineering (DSME) in Korea, is on lease from Atwood Oceanics at a day rate of US$495,500.
The drillship has been designed to operate in a maximum water depth of 12,000 ft (3,657 m) and the maximum drilling depth of 40,000 ft (12,192 m).