An appraisal well in the Cygnus gas field, in the UK's southern North Sea, has achieved a stabilised flow rate of 28 million standard cubic feet a day, operator GDF Suez has announced.
Appraisal well 44 / 11a-4 in the western area of Cygnus lies within the UK Continental Shelf (UKCS) blocks 44 / 12a and 44 / 11a in the UK southern North Sea, 15km northwest of the Tyne Field.
The 44 / 11a-4 well achieved a stabilised flow rate of 28 million standard cubic feet per day, confirming "good quality reservoir", according to GDF.
The well was drilled by the ENSCO 100 jack-up drilling rig and was spudded on 18 February 2010.
It reached a true vertical depth (TVD) of 12,344ft and encountered 133ft of gas-bearing reservoir in the Leman interval.
A second appraisal well is due to spud in fault block 5 once operations are complete on well 44 / 11a-4.
GDF Suez E&P UK is the operator with 38.75%. Its licence partners are Centrica (48.75%) and Endeavour Energy UK Limited (12.5%).
The partners are in the process of detailed development planning and will announce new concept details in due course, GDF said.