World Assessment Summaries
By USGS World Energy 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
5        North America (non-U. S.)
Oil Fields
1.00
6,802
70,837
157,491
70,491
11,754
85,536
213,925
91,926
656
4,911
13,505
5,515
 Gas Fields
          
8,690
60,598
139,674
62,574
241
2,158
5,652
2,338
Total
1.00
6,802
70,837
157,491
70,491
20,444
146,134
353,599
154,499
897
7,069
19,157
7,853
6        Central and South America
Oil Fields
1.00
20,090
92,658
230,727
105,106
30,352
147,403
404,102
173,881
1,502
7,675
22,416
9,276
 Gas Fields
          
65,816
273,591
683,420
313,309
2,059
9,168
25,372
10,919
Total
1.00
20,090
92,658
230,727
105,106
96,168
420,994
1,087,521
487,190
3,561
16,843
47,788
20,196
7        Sub-Saharan Africa and Antarctica
Oil Fields
1.00
26,783
68,999
124,447
71,512
47,393
130,775
268,891
140,685
1,763
5,180
11,533
5,722
 Gas Fields
          
36,081
89,369
170,545
94,604
2,015
4,762
9,031
5,044
Total
1.00
26,783
68,999
124,447
71,512
83,474
220,144
439,436
235,290
3,778
9,942
20,564
10,766
8        South Asia
Oil Fields
1.00
1,032
3,330
6,957
3,580
2,354
8,345
19,888
9,370
90
357
967
420
 Gas Fields
          
28,164
98,823
228,759
110,240
516
1,873
4,878
2,184
Total
1.00
1,0321
3,330
6,957
3,580
30,518
107,168
248,647
119,610
606
2,230
5,845
2,604
 
 
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U. S. Geological Survey Digital Data Series - DDS-60