In addition, the Department of Energy and Climate Change (DECC) has awarded Cygnus field participants interest in P1731 covering blocks 44/11b and 44/12b. This new license contains additional fault blocks forming a northerly extension of the Cygnus structure that are yet to be appraised by drilling.
William Transier, chairman, CEO and president of Endeavour, said: “With the successful completion of this well in the Cygnus gas field, we are now pursuing an optimized field development concept that will be designed to accommodate the potentially significant flow rates from this world-class gas field.
“Our expanded leasehold position will allow us to maximize the potential of the field and to accelerate first production in a country where new natural gas supply is needed.”
The 44/12a-5 appraisal well achieved a stabilized flow rate of 29 million standard cubic feet of natural gas per day from 94ft of perforations in the Leman reservoir.
According to Endeavour, analysis of the results from Cygnus well data combined with seismic data has led to a reserve estimate in the five appraised fault blocks ranging from a low case of 500 billion cubic feet to an upside of 1.2 trillion cubic feet. The additional fault blocks falling mainly in the new license can add material volumes once drilled.
Endeavour holds a 12.5% interest in blocks 44/11a and 12a and 17.24% in blocks 44/11b and 44/12b. License participants are GDF Suez E&P, the operator, and Centrica.
