Egdon Resources and Union Jack Oil both told shareholders on Monday that an appeal against a refusal by the Lincolnshire County Council had been submitted.
The AIM-traded firms said the council had refused an extension of time to the existing planning permission for the drilling and testing of a conventional exploration well at the North Kelsey site in licence PEDL241 in March.
Egdon holds a 50% interest in PEDL241, and is the operator, while Union Jack holds the remaining 50%.
Egdon Resources plc (LON:EDR) is an independent onshore focused oil and gas exploration and production business. An established oil and gas exploration and production business with 41 licences in proven oil and gas producing basins in the UK.