The Wressle-1 well has been brought back into production at the joint venture within PEDL180/192 oil field in Lincolnshire.
Project partners comprise operator Egdon Energy plc (30%), Union Jack Oil plc (40%) and Europa Oil & Gas (Holdings) plc (30%).
Union Jack and Europa said that the down-hole jet pump, installed in October, and associated surface equipment was operating.
Since production resumed, W1 has produced at gross rates of more than 950 bbls of oil per day compared with approximately 750 bopd prior to the jet pump.
Union Jack Oil plc (LON:UJO) is an onshore oil and gas exploration company with a focus on drilling, development and investment opportunities in the United Kingdom hydrocarbon sector.