Production is under way from the Juliet North Sea gas field, operator GDF Suez has confirmed.
Intial gas is now being produced from the first of two wells on the field, which sits 39km off the Lincolnshire coast.
A second well is due to come online in the next few weeks as the French firm looks to produce a maximum of 800million cubic metres of gas each year.
“Start of commercial production from Juliet is an important and exciting milestone as GDF SUEZ becomes a fully fledged North Sea production operator,” said GDF vice president Jean-Marie Dauger.
“Juliet demonstrates our commitment to continuously developing the potential of the United Kingdom Continental Shelf and the value that can be derived in a mature region through the efficient use of existing infrastructure.”
Gas from the field, originally discovered five years ago, is transported to the Pickerill A platform, before being transported to the Theddlethorpe gas terminal in Lincolnshire.