Independent Oil and Gas's licence P1736 that contains the Blythe gas discovery has been extended by 12 months to the end of December 2018.
IOG said the Blythe gas field contained 33bn cu ft of 2P reserves and was an important part of the combined Blythe and Vulcan Satellites hub developments.
It said the field development plan for Blythe was initially submitted in December 2016 and re-submitted in July as part of a joint development plan with IOG's nearby Elgood discovery.
It said first gas was expected from the Blythe hub in the middle of 2019.
It said: 'The licence extension is contingent upon a number of milestones agreed with the Oil and Gas Authority culminating in the submission of a final FDP that is capable of approval without further clarification, amendment or submissions by 31st August 2018.'
At 9:40am: (LON:IOG) Independent Oil Gas PLC share price was 0p at 18p