As of December 31, 2002, about 5.71billion barrels of petroleum liquids (both oil and natural gas condensate) and about 24.6 trillion cubic feet of natural gas were estimated to exist as "remaining proved reserves" in 928 proved active fields of the Gulf of Mexico Outer Continental Shelf. This report, Estimated Oil and Gas Reserves Gulf of Mexico Outer Continental Shelf, December 31, 2002, indicates an increase of about 1.68 billion barrels of liquid (oil and gas condensate) and a increase of 0.3 trillion cubic feet of gas in remaining proved reserves as compared with the December 31, 2001, estimates.

Unproved reserves as of December 31, 2002, have been estimated to be 1.35 billion barrels of oil and 3.1 trillion cubic feet of gas. These reserves include unproved reserves from proved and unproved active fields. There are 64 unproved active fields. In summary, there are 992 active fields located in Federal waters.

Proved reserves are estimated to have been 18.75 billion barrels of oil and 176.8 trillion cubic feet of gas from 1,112 proved fields under the Federal submerged lands in the Gulf of Mexico. Included in this number are 184 fields that are depleted and abandoned; not included are the 64 unproved active fields. As of December 31, 2002, cumulative production from these 1,112 fields was 13.04 billion barrels of oil and 152.2 trillion cubic feet of gas.