The field has proven reserves of over 230 million barrels of oil.

Offshore drilling by American companies had recently proved huge reserves of oil and natural gas.

The mine also has proven reserves of 46 million ounces of gold, according to the company's 2004 annual report.

Saudi Arabia alone says it has proven reserves of 260 billion barrels of oil.

They still need to prove additional reserves, specifically in eastern Siberia.

The three categories of reserves generally used are proven, probable, and possible reserves.

The basin has proven reserves of 56 billion tons, enough to supply the nation for more than 50 years at current consumption rates.

Proved reserves of natural gas amount to 5.663 bln.

Qatar has proven reserves of oil and natural gas.

American fields, by contrast, often have proven reserves and can often be made more productive at low cost.