BP and a consortium of partners on Dec. 31 announced the start of commercial gas deliveries to Europe from the Shah Deniz gas field in the Caspian Sea offshore Azerbaijan via the newly-completed Southern Gas Corridor (SGC) pipeline system. Shares of the multinational oil and gas company lost 2.4% at the close on Dec. 31. BP (BP) has a 28.8% stake in the consortium. BP discovered Shah Deniz, its largest gas discovery to date, in 1999. The start of gas deliveries through the final section of the SGC stretches 3,500 kilometres from Azerbaijan to Europe.