San Leon said it had agreed to a revised payment schedule in respect to sums owed to Avobone.
The remaining payments of €8m, previously due during October, and €6.69m, previously due during November, will now be paid not later than January 15, San Leon said.
The company said it could make the payments earlier, depending on when it receives Nigerian funds.
The company is scheduled to be repaid approximately US$19m per quarter on its loan notes from the fourth quarter of 2017, with the next payment due to be received on or before January 1.
At 8:35am: (LON:SLE) San Leon Energy PLC share price was +0.25p at 24.75p