On April 6, 1993, the Tengizchevroil (TCO) joint venture was formed between Chevron, the Republic of Kazakhstan, Exxon, LUKOIL, and other partners to develop the massive Tengiz oil field. Located near the Caspian Sea, Tengiz ranks among the deepest and most technically challenging oil fields ever developed.
Tengiz contains an estimated 6 to 9 billion barrels of recoverable oil, with reservoirs buried more than 13,000 feet below the surface and containing extremely high sulfur levels. At peak output, the field has produced over 600,000 barrels per day, becoming the backbone of Kazakhstan's oil economy.
The TCO venture helped establish Kazakhstan as a major global oil producer and reshaped post-Soviet energy development in Central Asia.
