Gazprom PJSC said Friday that it discovered an oil leak on equipment that would prevent it from resuming natural gas deliveries on Nord Stream 1 (NS1) until repairs can be made, dealing a blow to Europe’s already tight market. 


The 6 Bcf/d, 745-mile system, which has been operating at 20% capacity since July, was taken offline Wednesday for work on the sole turbine feeding the pipeline. Gazprom said it discovered an oil leak impacting various parts of the unit during maintenance work it was carrying out with Siemens AG, thwarting a restart planned for Saturday.

“The complete elimination of oil leakage on these engines is possible only in the conditions of a specialized repair shop,” Gazprom said in a statement on Telegram shortly after European gas markets...