Kazakhstan says Tengiz oilfield outage last week was caused by a faulty transformer, Ifax reports

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- An outage at Kazakhstan's largest oilfield, Tengiz, last week was caused by a malfunctioning transformer, Russia's Interfax news agency reported on Tuesday, citing the Kazakh emergencies ministry.

Kazakhstan said on Monday it had restored its oil production to 290,000 metric tons per day following earlier output losses at Tengiz.