Royal Dutch/Shell Group's reclassification of proven reserves downward ... its 2002 figures (see "U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves 2002 Annual Report" on the ...

In 2005, Dallas-based petroleum consulting company DeGolyer & MacNaughton said Bolivia had 26.7 TCF of proven reserves and held the second-largest gas reserves in South America behind Venezuela.

The Organization of Petroleum exporting countries, OPEC, holds 77.2% of the world's proven reserves and 49.3% of natural gas, according to the latest Annual Statistical Bulletin for 2006 ...