Atlantic Petroleum said during the last month it produced more than 30,000 barrels of oil equivalent from the Chestnut, Ettrick and Blackbird fields.
The company said production in September had been impacted by the shut down in the Chestnut field due to planned scale squeeze operations.
The average daily production was 1,100 boe per day for the company.
Atlantic said the operations at the Chestnut field were now successfully completed and the field is also back to full production.