EXECUTIVE SUMMARY

By USGS World Energy Assessment Team

in
U.S. Geological Survey Digital Data Series 60
 

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Table 1. World level summary of petroleum estimates for undiscovered conventional petroleum and reserve growth for oil, gas, and natural gas liquids (NGL).
[BBOE, billions of barrels of oil equivalent. Six thousand cubic feet of gas equals one barrel of oil equivalent. F95 represents a 95 percent chance of at least the amount tabulated. Other fractiles are defined similarly. Production and reserves normalized to 1/1/96. Shading indicates not applicable]
 
 
Oil
Gas 
NGL
 
Billion Barrels
Trillion Cubic Feet
BBOE
Billion Barrels
 
F95
F50
F5
Mean
F95
F50
F5
Mean
Mean
F95
F50
F5
Mean
 World (excluding United States)
Undiscovered conventional
334
 607
 1,107
 649
 2,299
 4,333
 8,174
4,669
 778
 95
 189
 378
 207
Reserve growth (conventional)
192
 612
 1,031
 612
 1,049
 3,305
 5,543
3.305
 551
 13
 42
 71
 42
Remaining reserves*  
 859
  
4,621
 770
  
 68
Cumulative production*  
 539
  
898
 150
  
 7
Total
2,659
13,493
2,249
324
United States
Undiscovered conventional
66
  
104
83
393
  
698
527
88
combined with oil
Reserve growth (conventional)
      
 76
      
355
 59
combined with oil 
Remaining reserves*
      
 32
      
172
 29
combined with oil 
Cumulative production*
      
 171
      
854
 142
combined with oil 
Total  
362
  
1,908
318
  
World Total
(including United States)		  
3,012
  
15,401
2,567
  
*World reserve and cumulative production data reflect only those parts of the world actually assessed and are from Petroconsultants (1996) and NRG Associates (1995).

**U.S. data from Gautier, D.L., Dolton, G.L., Takahashi, K.I., and Varnes, K.L., eds, 1996, 1995 National assessment of United States oil and gas resources--Results, methodology, and supporting data: U.S. Geological Survey Digital Data Series DDS-30, release 2, one CD-ROM, and from Minerals Management Service, 1996, An assessment of the undiscovered hydrocarbon potential of the Nation's outer continental shelf: Minerals Management Service OCS Report, MMS 96-0034, 40 pages.

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 Executive Summary  -  U.S. Geological Survey Digital Data Series 60