Energy Voice | Chevron Approves $37 Billion Expansion of Kazakh Oil Project Bloomberg The Tengiz expansion comes after oil explorers around the globe slashed more than $1 trillion in investments to weather a downturn that saw oil prices tumble 75 percent from June 2014 to a 12-year low in January. The slump has reduced prices of some ... Chevron, Exxon Commit to $36.8 Billion Expansion Project in Tengiz |