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U. S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

Appendix B
U.S. Geological Survey Estimates of undiscovered resources for Niger Delta Province
[mmbo, million barrels of oil. bcfg, billion cubic feet of gas. mmbngl, million barrels of natural gas liquids. mfs, minimum field size assessed (mmbo or bcfg). Prob., probability (including both geologic and accessibility probabilities) of at least one field equal to or greater than the mfs. Results shown are fully risked estimates. For gas fields, all liquids are included under the NGL (natural gas liquids) category. F95 represents a 95% chance of at least the amount tabulated. Other fractiles are defined similarly. Fractiles are additive under the assumption of perfect positive correlation.]
 
 
Undiscovered Resources
Largest Undiscovered Field
USGS   ID
mfs
Prob.
Oil (mmbo)
Gas (bcfg)
NGL (mmbngl)
(MMBO or BCFG)
Number
(0-1)
F95
F50
F5
Mean
F95
F50
F5
Mean
F95
F50
F5
Mean
F95
F50
F5
Mean
7 Sub-Saharan Africa and Antarctica Region
7192 Niger Delta Province
 
719201 Tertiary Niger Delta (Agbada/Akata) Total Petroleum System
71920101 Agbada Reservoirs Assessment Unit
Oil Fields
1
1.00
11,597
21,659
33,021
21,925
18,788
38,085
68,615
40,078
585
1,245
2,376
1,330
559
1,018
1,440
1,013
Gas Fields
6
1.00        
24,738
44,619
66,857
45,098
1,492
2,709
4,135
2,748
1,704
3,600
6,410
3,778
 
71920102 Akata Reservoirs Assessment Unit
 
1
1.00
5,891
18,316
32,102
18,562
9,915
32,035
64,965
33,977
317
1,046
2,233
1,130
630
1,517
2,747
1,586
Gas Fields
6
1.00
       
4,107
13,292
23,729
13,563
249
808
1,459
826
555
1,373
2,956
1,513
 
Sums: Niger Delta Province
Oil Fields
1.00
17,487
39,975
65,123
40,487
28,703
70,120
133,579
74,056
903
2,292
4,608
2,459
Gas Fields
1.00
       
28,845
57,910
90,585
58,660
1,741
3,517
5,594
3,574
 

 
 

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U. S. Geological Survey Open File Report 99-50H