Field DevelopmentChevron-led venture agrees improved deal for Kazakh playerTengiz will deliver gas for processing at a state-run facility at the field due online in 2029Tengizchevroil general director Kevin Lyon (left), KazMunayGaz executive board chairman Askhat Khasenov (centre) and KazMunayGaz deputy executive chairman Dastan Abdulgafarov.Photo: TENGIZCHEVROILVladimir AfanasievEuropean Correspondent