About 30 billion barrels?
Recent seismic studies suggest that Tengiz may have between 9 and 13.5 billion barrels of oil.
Tengizchevroil, the joint-venture consortium developing the Tengiz field, is comprised of ChevronTexaco, ExxonMobil, KazakhOil, and LukArco.
At Karachaganak, the Karachaganak Integrated Organization (KIO) is a consortium of ENI, British Gas and ChevronTexaco, and manages drilling. In addition to major oil deposits, Karachaganak also has 500 billion cubic meters of natural gas.
The most promising recent discovery of major hydrocarbon deposits is at offshore Kashagan, which is three times larger than Tengiz. The consortium developing this 2,000 square mile block 14,000 feet below the Caspian seabed includes seven companies: ENI, British Gas, ExxonMobil, Shell, Total Fina Elf, Phillips, and Inpex.