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National Assessment of Oil and Gas Fact Sheet

Assessment of Undiscovered Oil and Gas Resources in Selected Rocky Mountain Provinces for the Energy Policy and Conservation Act of 2000 (EPCA 2000)

Table 1. Assessment results for six Energy Policy and Conservation Act of 2000 provinces.
[MMBO, million barrels of oil; BCFG, billion cubic feet of gas; MMBNGL, million barrels of natural gas liquids. Results shown are fully risked estimates. For gas fields, all liquids are included under the NGL (natural gas liquids) category. F95 denotes 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. Assessment results for the Paradox Basin are from Dolton and Fox (1996). Gray shading indicates not applicable (N / A)]

Total undiscovered resources


Total Petroleum Systems (TPS)
and Assessment Units (AU)		 Field
type

Oil (MMBO)
F95
F50
F5
Mean

Gas (BCFG)
F95
F50
F5
Mean

NGL (MMBNGL)
F95
F50
F5
Mean
Montana Thrust Belt Province
Conventional Resources
Oil
Gas
11.80
68.60
191.50
80.90
N / A
N / A
N / A
N / A
25.00
137.50
408.80
167.10
1,075.50
6,994.50
20,265.40
8,359.70
1.00
5.40
16.70
6.60
27.20
184.30
573.30
227.60
Continuous Resources
Oil
12.90
25.50
50.60
27.90
46.80
100.10
214.30
111.40
2.10
4.90
11.30
5.60
Paradox Basin Province
Conventional Resources
Oil
Gas
17.40
137.30
458.50
233.30
N / A
N / A
N / A
N / A
40.71
332.05
1,110.50
570.57
64.60
483.20
1,501.40
716.20
4.25
34.44
115.36
59.47
0.55
4.21
12.96
5.28
Continuous Resources
Oil
60.68
190.34
597.03
242.32
48.55
152.27
477.62
193.86
0.00
0.00
0.00
0.00
Powder River Basin Province
Conventional Resources
Oil
Gas
80.70
629.70
2,513.80
1,131.20
N / A
N / A
N / A
N / A
57.73
446.51
1,679.05
739.22
22.40
155.50
574.30
271.80
3.75
28.67
85.43
44.75
1.34
9.33
34.46
16.31
Continuous Resources
Oil
Gas
252.52
406.81
655.41
424.28
N / A
N / A
N / A
N / A
222.89
398.60
712.82
424.28
8,585.99
14,335.40
23,903.15
15,051.13
11.99
23.44
45.77
25.46
0.00
0.00
0.00
0.00
San Juan Basin Province
Conventional Resources
Oil
Gas
7.00
17.76
35.92
19.10
N / A
N / A
N / A
N / A
31.35
87.03
175.31
93.33
27.21
66.21
135.49
71.82
0.45
1.23
2.79
1.37
0.93
2.34
5.14
2.60
Continuous Resources
Gas
N / A
N / A
N / A
N / A
41,015.03
49,929.85
61,488.02
50,419.45
91.52
139.56
213.68
144.40
Southwestern Wyoming
Province
Conventional Resources
Oil
Gas
7.30
22.60
68.40
19.10
N / A
N / A
N / A
N / A
20.60
59.80
164.90
72.00
590.10
2,028.90
5,211.40
2,348.80
1.00
3.10
9.20
3.90
16.50
58.90
162.10
70.20
Continuous Resources
Oil
Gas
66.90
100.50
151.00
103.60
N / A
N / A
N / A
N / A
34.90
59.10
99.90
62.20
52,574.00
79,075.70
121,731.00
82,169.10
1.90
3.50
6.50
3.70
1,275.60
2,326.10
4,335.20
2,503.90
Uinta-Piceance Province
Conventional Resources
Oil
Gas
7.15
19.09
40.44
20.39
N / A
N / A
N / A
N / A
8.77
27.74
70.09
32.11
59.01
162.31
366.71
181.15
0.49
1.62
4.38
1.92
0.93
2.67
6.28
3.01
Continuous Resources
Oil
Gas
24.83
37.57
56.84
38.78
N / A
N / A
N / A
N / A
35.72
60.74
103.29
63.99
2,118.77
20,060.53
33,875.52
21,147.04
2.23
4.17
7.79
4.48
16.49
30.88
58.62
33.36

Total Conventional
Resources
131.35
895.05
3,306.56
1,512.69
2,023.48
10,981.25
31,663.35
13,623.80
58.39
336.21
1,038.10
443.01

Total Continuous
Resources
 
417.83
760.72
1,510.88
836.88
114,862.65
164,172.29
242,605.62
169,580.25
1,339.93
2,529.05
4,672.36
2,717.20

Total Undiscovered
Oil and Gas Resources
 
549.18
1,655.77
4,817.44
2,349.57
116,886.13
175,153.54
274,268.97
183,204.97
1,458.32
2,865.26
5,710.46
3,160.21
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