Tullow said it was having a problem with how gas is compressed at a storage and production ship stationed on the Jubilee Field. Until it is fixed, the company has had to reduce oil production by about a third. "Tullow has mobilised a team of experts to rectify the fault within the gas compression system and estimates that it will take approximately a further three weeks to reinstate gas export and full oil production," the firm said. Analysts immediately turned to whether Tullow would have to cut its production forecasts when it issues its half-year results at the end of this month. Tullow had been guiding an average production of 103,000 BOPD in 2015, but Davy Stockbrokers' Caren Crowley said that may now turn out to be closer to 100,000. "The impact of constrained oil production for a period of a month and half implies that Jubilee's oil production in 2015 could average 100,000 BOPD, down from recent guidance of 103,000 BOPD.