Venezuelan state oil firm PdV said cyber attacks on company systems that started on 13 December have been contained.
In an internal communication seen by Argus over the weekend PdV told workers that all of the company's computers had been infected with a virus that erased information. The attack appeared to be focused on operations in the Oriente Norte division, where a number of pipelines, refineries and upgraders of Orinoco extra heavy crude operate.
Workers had been instructed not to turn on any work computers until further notice.
Exiled oil union boss Ivan Freites posted on social media on Sunday that the attack shut down operating and control systems for docks, production and refineries in the region. "Workers are operating in emergency mode, under extremely risky conditions," Freites said.
US oil major Chevron, which is a partner with PdV in four joint ventures, including two located in or near the Oriente Norte area, said its operations continue without disruption.
