Cygnus Confirms Largest Ever Discovered UK Sector of North Sea

A sixth appraisal well has been drilled and tested on the Cygnus gas field, further confirming the find as one of the largest ever discovered in the UK sector of the southern North Sea. The 44/12a-5 appraisal well achieved a stabilized flow rate of 29 MMcf/d from 94 feet (29 meters) of perforations in the Leman reservoir. Data from the well coupled with seismic interpretation has led to a reserve estimate (in the five appraised fault blocks) ranging from 500 Bcf to 1.2 Tcf of natural gas. Additionally, the Department of Energy and Climate Change awarded the Cygnus field participants interests in license P1731, which covers Blocks 44/11b and 44/12b. This new license contains additional fault blocks forming a northern extension of the Cygnus structure. GDF Suez E&P, the operator of the field, is now pursuing an optimized field development concept for Cygnus. The Cygnus field is located within UKCS Blocks 44/12a and 44/11a. Partners on the field include Centrica (48.75%), and Endeavour (12.5%).

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