Kazakhstan was able to divert only a small fraction of the crude it could not ship through the CPC pipeline to the Black Sea in January, contributing to a sharp drop in production.

Exports on routes other than CPC rose by about 25,000 barrels a day in January compared with November, representing just 6% of the drop in flows along the pipeline route over the same period, The Caspian Post reports via Bloomberg.

The Central Asian nation shipped 1.36 million tons of crude through the Atyrau-Samara and Atasu-Alashankou pipelines to Russia and China respectively and across the Caspian Sea from the port of Aktau in January. That was up from 1.22 million tons in November, the Ministry of Energy said in response to Bloomberg questions.

The barrel-per-day figure is calculated using Bloomberg’s 7.905 barrels per ton conversion factor applied to CPC shipments.

Over the same period, exports chaneled through CPC dropped by about 440,000 barrels a day to the lowest in more than seven years, ship-tracking data compiled by Bloomberg show.

The CPC marine terminal suffered a sea-drone attack in late-November that damaged one of the two operational loading buoys, reducing capacity by half. The mooring was replaced almost two months later and brought into operation on Jan. 25, tracking data show.

The inability to reroute exports contributed to a 35% drop in oil output, which fell to 5.25 million tons, or about 1.34 million barrels a day, in January, from 8.1 million tons, or 2.13 million barrels a day, in November, official data show. These figures include condensates, a light form of oil extracted from gas fields.

January’s production issues were compounded by a fire at a power plant on the giant Tengiz project, which forced operator Tengizchevroil to halt pumping from its Tengiz and Korolev fields from Jan. 19. It began restoring output a week later.