Table C6. Assumed Lower 48 Total Natural Gas Resource Base as of January 1, 1998

Table C6. Assumed Lower 48 Total Natural Gas Resource
Base as of January 1, 1998
(Trillion Cubic Feet)

Resource	NPC Study	EIA Study
Resource	NPC Study	As Reported	With Associated Gas Allocated
Proved Reserves	157	157	157
Conventional
New Field Discoveries	633	356	450
Onshore	376	172	200
Offshore	257	184	250
Shallow	118	63	70
Deep	139	121	180
Reserve Growth	222	223	253
Unconventional	454	502	502
Tight Gas	230	351	351
Coalbed Methane	74	86	86
Gas Shales	52	65	65
Other	15	—	—
Reserve Growth	^a83	—	—
Associated Gas	—	124	^b—
Total	1,446	1,362	1,362
^aUsing unconventional gas resource growth of 83 trillion cubic feet to match aggregate values in summary tables. ^bAfter allocating 94 trillion cubic feet to new fields and 30 trillion cubic feet to reserve growth. Sources: National Petroleum Council, Natural Gas: Meeting the Challenges of the Nation’s Growing Natural Gas Demand (Washington, DC, December 1999); and Energy Information Administration, Office of Integrated Analysis and Forecasting, National Energy Modeling System runs OGBASE.D051200A and OGDEPL.D051200A.