BP plc has asked U.S. regulators to force Venture Global LNG Inc. to release confidential documents related to the extended commissioning process of the Calcasieu Pass export terminal, arguing that Venture Global has failed to meet FERC disclosure rules for the delayed start-up of commercial operations.

BP’s filing to the Federal Energy Regulatory Commission on Monday is the latest escalation in an increasingly public dispute over Venture Global’s 10 million metric tons/year (mmty) Calcasieu Pass terminal, which loaded its first commissioning cargo early last year. 

BP contracted for 2 mmty of its capacity, but Venture Global has yet to declare the facility complete and commercially operable, a status that would require it to begin supplying cargoes under its long-term...