World Assessment Summaries
By USGS World Assessment Team
in
U.S. Geological Survey Digital Data Series 60

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World Undiscovered Assessment Results Summary
[MMBO, million barrels of oil. BCFG, billion cubic feet of gas. MMBNGL, million barrels of natural gas liquids. Prob., probability (including both geologic and accessibility probabilities) of at least one field equal to or greater than the minimum assessed field size. Results shown are fully risked estimates. For gas fields, all liquids are included under the NGL (natural gas liquids) category. F95 represents a 95 percent chance of at least the amount tabulated. Other fractiles are defined similarly. Fractiles are additive under the assumption of perfect positive correlation. For the total of non-U.S. undiscovered petroleum, the resources in oil fields and in gas fields were aggregated by a separate Monte Carlo procedure from that of total resources; thus these lines do not add perfectly. Shading indicates not applicable]
Code
and Field
Type
Prob
(0-1).
Undiscovered Resources
Oil (MMBO)
Gas (BCFG)
NGL (MMBNGL)
F95
F50
F5
Mean
F95
F50
F5
Mean
F95
F50
F5
Mean
TOTAL: Non-U.S. Undiscovered Petroleum
Oil Fields
1.00
333,881
607,458
1,107,468
648,628
525,104
1,029,753
2,039,030
1,122,365
25,606
53,366
112,825
59,355
Gas Fields
         
1,787,043
3,297,448
6,188,050
3,547,123
69,145
135,388
266,202
147,662
Total
1.00
333,881
607,458
1,107,468
648,628
2,298,554
4,333,377
8,173,731
4,669,488
94,842
189,105
378,368
207,017
U.S. Undiscovered Petroleum
(from USGS 1995 National Assessment and MMS 1996 Outer Continental Shelf Assessment)
Total
1.00
60,500
 
94,700
75,600
392,600
  697,600
526,900
6,500  
9,900
8,000
Grand Total: World Undiscovered Petroleum
Total
1.00
394,381
 
1,202,168
724,228
2,691,154
  8,871,331
5,196,388
101,342
 
388,268
215,017

 
[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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