Chevron to pour $15B into Kazakh Field

    TengizChevroil LLP, the Kazakh oil venture led by Chevron Corp, plans to invest $15.2 billion to boost oil output at the country's largest producing field from 2016, KazMunaiGaz National Co. said.     The venture plans to increase oil production at the Tengiz field to 36.4 million metric tons a year after 2016,...