Section 3 

Results 

3.0 RESULTS 

The results of the analyses are presented below where they are summarized by access category 

for land area and resources. Table 3a shows the results for the combined study areas and Tables 

3b through 3f show the results for individual study areas. These tables show the results for land 

access categorization for land area, total liquids (oil, NGLs and liquids associated with gas 

reservoirs), and total natural gas (associated and non-associated). Total liquids and total natural 

gas comprise undiscovered technically recoverable resources and proved reserves. Matching 

charts depicting the access categorization are shown in figures 3a through 3f. Federal land access 

categorization maps for each study area are shown in figures 3g through 3k. 

Corresponding maps showing the accessibility of undiscovered liquids resources on Federal lands 

for each study area are shown in figures 3l through 3p. Maps showing the accessibility of 

undiscovered natural gas resources on Federal lands for each study area are shown in figures 3q 

through 3ad. Note that, by way of example, figures 3s through 3ab show the GGRB Study Area 

where, in a sequence of the ten maps, the undiscovered natural gas resources available at each of 

the land access hierarchy levels are presented. This represents a sample of what can be derived 

from the GIS data that can be found on the CD-ROM. 

For the remainder of Section 3 the term “resources” is used to denote “undiscovered technically 

recoverable resources and proved reserves.” 

3.1 STUDY AREA FEATURES 

Each of the study areas is unique in terms of its Federal lands, resources and reserves 

accessibility. Noted features are presented below: 

3.1.1 Paradox/San Juan Basin 

• Approximately 34 percent (5.96 million acres) of the Federal land in the basin is 

available for oil and gas leasing with standard stipulations (Figure 3b, “Leasing, Standard 

Lease Terms”). Based on resource estimates, these lands contain 52 percent (224 million 

barrels) of the technically recoverable oil and 79 percent (28.9 trillion cubic feet) of the 

technically recoverable gas in the basin. 

• Approximately 9 percent (1.62 million acres) of the Federal land is available for 

leasing with restrictions on oil and gas operations beyond standard stipulations (Figure 

3b, all other “Leasing” categories except “Leasing, Standard Lease Terms”). Based on 

resource estimates, these lands contain 16 percent (68 million barrels) of the technically 

recoverable oil and 17 percent (6.28 trillion cubic feet) of the technically recoverable gas 

in the basins. 

• Approximately 57 percent (10 million acres) of the Federal land in the basin is not 

available for leasing (Figure 3b, 3 “No Leasing” categories). Based on resource 

estimates, these lands contain about 32 percent (138 million barrels) of the technically 

recoverable oil and 3 percent (1.18 trillion cubic feet) of the technically recoverable 

natural gas in the basins. 

• The estimated volume of oil under all lands within the basin ranges from 174 to 1,319 

million barrels, with a mean estimate of 660 million barrels1

. 

1

USGS reports the volume of undiscovered oil and natural using a range of likelihoods (or percentage) that 

a certain volume of oil and natural gas is present. These estimates range from a 5 percent chance for a 

3-1 
Section 3 

Results 

• The estimated volume of natural gas under all lands within the basin ranges from 41 to 

64 trillion cubic feet, with a mean estimate of 52 trillion cubic feet. 

• Most of the undiscovered natural gas (approximately 95 percent) is found widely 

dispersed in continuous2

 deposits rather than distinct structural traps. 

• Most of the oil (52 percent) and natural gas (79 percent) are available under standard 

lease terms. 

• Among the five study areas in the inventory, this area has the greatest proportion of 

proved natural gas reserves (28 percent) relative to undiscovered resources. 

3.1.2 Uinta/Piceance Basin 

• Approximately 45 percent (6.23 million acres) of the Federal land in the basin is 

available for oil and gas leasing with standard stipulations (Figure 3c, “Leasing, Standard 

Lease Terms”). Based on resource estimates, these lands contain 85 percent (186 million 

barrels) of the technically recoverable oil and 57 percent (9.26 trillion cubic feet) of the 

technically recoverable gas in the basin. 

• Approximately 35 percent (4.74 million acres) of the Federal land is available for 

leasing with restrictions on oil and gas operations beyond standard stipulations (Figure 

3c, all other “Leasing” categories except “Leasing, Standard Lease Terms”). Based on 

resource estimates, these lands contain 9 percent (19 million barrels) of the technically 

recoverable oil and 37 percent (5.99 trillion cubic feet) of the technically recoverable gas 

in the basins. 

• Approximately 20 percent (2.72 million acres) of the Federal land in the basin is not 

available for leasing (Figure 3c, 3 “No Leasing” categories). Based on resource 

estimates, these lands contain about 7 percent (14 million barrels) of the technically 

recoverable oil and 6 percent (0.89 trillion cubic feet) of the technically recoverable 

natural gas in the basins. 

• The estimated volume of oil under all lands within the basin ranges from 61 to 296 

million barrels, with a mean estimate of 149 million barrels. 

• The estimated volume of natural gas under all lands within the basin ranges from 12 to 

35 trillion cubic feet, with a mean estimate of 22 trillion cubic feet. 

• Most of the undiscovered natural gas (greater than 95 percent) is found widely 

dispersed in continuous deposits rather than distinct structural traps. 

• Among the five study areas, this area has the highest percentage of oil (85 percent) 

available under standard lease terms. This is partly because most of the oil (63 percent) 

is proved reserves. 

• Compared to the other four areas in this inventory, this area has the highest percentage 

of federal lands (9 percent), as well as the natural gas (15 percent) resources designated 

within the “no surface occupancy” category. 

3.1.3 Greater Green River Basin 

large volume to a 95 percent chance for a small volume of oil and natural gas to occur. This inventory used 

the mean or the average of all the possible likelihoods and volumes. For the Paradox/San Juan Basin, there 

is a 5 percent likelihood that 1,319 million barrels of oil and a 95 percent likelihood that 174 million barrels 

of oil could occur. However, the average estimate for the area is 600 million barrels of oil. 

2

 A continuous accumulation of oil or natural gas is one that is located throughout a large area and lacks a 

discrete border or structural trap. 

3-2 
Section 3 

Results 

• Approximately 45 percent (5.12 million acres) of the Federal land in the basin is 

available for oil and gas leasing with standard stipulations (Figure 3d, “Leasing, Standard 

Lease Terms”). Based on resource estimates, these lands contain 57 percent (1,162 

million barrels) of the technically recoverable oil and 61 percent (43.6 trillion cubic feet) 

of the technically recoverable gas in the basin. 

• Approximately 37 percent (4.24 million acres) of the Federal land is available for 

leasing with restrictions on oil and gas operations beyond standard stipulations (Figure 

3d, all other “Leasing” categories except “Leasing, Standard Lease Terms”). Based on 

resource estimates, these lands contain 31 percent (635 million barrels) of the technically 

recoverable oil and 29 percent (20.6 trillion cubic feet) of the technically recoverable gas 

in the basins. 

• Approximately 19 percent (2.16 million acres) of the Federal land in the basin is not 

available for leasing (Figure 3d, 3 “No Leasing” categories). Based on resource 

estimates, these lands contain about 13 percent (259 million barrels) of the technically 

recoverable oil and 10 percent (7.35 trillion cubic feet) of the technically recoverable 

natural gas in the basins. 

• The estimated volume of oil under all lands within the basin ranges from 1,367 to 

4,724 million barrels, with a mean estimate of 2,709 million barrels. 

• The estimated volume of natural gas under all lands within the basin ranges from 53 to 

127 trillion cubic feet, with a mean estimate of 85 trillion cubic feet. 

• Almost all of the undiscovered natural gas (97 percent) is widely dispersed in 

continuous deposits rather than distinct structural traps. 

• A relatively large portion of the federal land (29 percent of the surface area) and, 27 

percent of the oil and 25 percent of the natural gas are under timing limitations of 3 to 9 

months. 

• Among the five inventory areas, this area has the greatest volume of oil (2.1 billion 

barrels) and natural gas (72 trillion cubic feet) under federal lands. 

• The land ownership pattern is highly complex due a checkerboard pattern of ownership 

resulting from railroad grants. 

3.1.4 Powder River Basin 

• Approximately 52 percent (5.51 million acres) of the Federal land in the basin is 

available for oil and gas leasing with standard stipulations (Figure 3e, “Leasing, Standard 

Lease Terms”). Based on resource estimates, these lands contain 63 percent (620 million 

barrels) of the technically recoverable oil and 59 percent (4.82 trillion cubic feet) of the 

technically recoverable gas in the basin. 

• Approximately 35 percent (3.73 million acres) of the Federal land is available for 

leasing with restrictions on oil and gas operations beyond standard stipulations (Figure 

3e, all other “Leasing” categories except “Leasing, Standard Lease Terms”). Based on 

resource estimates, these lands contain 33 percent (324 million barrels) of the technically 

recoverable oil and 32 percent (2.57 trillion cubic feet) of the technically recoverable gas 

in the basins. 

• Approximately 14 percent (1.45 million acres) of the Federal land in the basin is not 

available for leasing (Figure 3e, 3 “No Leasing” categories). Based on resource 

estimates, these lands contain about 4 percent (36 million barrels) of the technically 

recoverable oil and 9 percent (0.76 trillion cubic feet) of the technically recoverable 

natural gas in the basins. 

3-3 
Section 3 

Results 

• The estimated volume of oil under all lands within the basin ranges from 350 to 3,345 

million barrels, with a mean estimate of 1,642 million barrels. 

• The estimated volume of natural gas under all lands within the basin ranges from 9 to 

27 trillion cubic feet, with a mean estimate of 16 trillion cubic feet. 

• Almost all undiscovered natural gas is continuous coalbed natural gas (98 percent). 

• Most of the federal land (52 percent) and 63 percent of the oil and 59 percent of the 

natural gas are available under standard lease terms. 

• Among the five inventory areas, this area has the highest proportion of federal land (10 

percent) and 12 percent of the oil, and 11 percent of the natural gas available under the 

controlled surface use category. 

• Among the five inventory areas, this area has the highest proportion of split estate 

lands3

 (60 percent of federal lands). 

3.1.5 Montana Thrust Belt 

• Approximately 4 percent (0.23 million acres) of the Federal land in the basin is 

available for oil and gas leasing with standard stipulations (Figure 3f, “Leasing, Standard 

Lease Terms”). Based on resource estimates, these lands contain 3 percent (6 million 

barrels) of the technically recoverable oil and 1 percent (0.05 trillion cubic feet) of the 

technically recoverable gas in the basin. 

• Approximately 14 percent (0.83 million acres) of the Federal land is available for 

leasing with restrictions on oil and gas operations beyond standard stipulations (Figure 

3f, all other “Leasing” categories except “Leasing, Standard Lease Terms”). Based on 

resource estimates, these lands contain 9 percent (15 million barrels) of the technically 

recoverable oil and 8 percent (0.52 trillion cubic feet) of the technically recoverable gas 

in the basins. 

• Approximately 82 percent (4.79 million acres) of the Federal land in the basin is not 

available for leasing (Figure 3f, 3 “No Leasing” categories). Based on resource 

estimates, these lands contain about 88 percent (149 million barrels) of the technically 

recoverable oil and 91 percent (5.73 trillion cubic feet) of the technically recoverable 

natural gas in the basins. 

• The estimated volume of oil under all lands within the area ranges from 55 to 843 

million barrels, with a mean estimate of 348 million barrels. 

• The estimated volume of natural gas under all lands within the area ranges from 1.1 to 

21 trillion cubic feet, with a mean estimate of 8.6 trillion cubic feet. 

• The area contains the smallest volume of resource of all five-inventory areas (oil, 348 

million barrels; natural gas, 8.6 trillion cubic feet). 

• A high percentage of the federal land (82 percent) and 88 percent of the oil and 91 

percent of the natural gas are currently “closed” to leasing. 

• The USDA-Forest Service is the primary federal land manager in the area (69 percent 

of the area of which almost half is currently “closed” to leasing while undergoing new 

land use planning). 

3

 Split estate lands are those lands where the surface rights belong to private individuals but the subsurface 

mineral rights are publicly held, and managed by the federal government. 

3-4 
More Area Resources 

Total Liquids* Total Natural Gas**

Level

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

No Leasing (Statutory/Executive Order) 10,068 17% 298 8% 9,035 7% 

No Leasing (Administrative, Pending Land Use Plan) 6,007 10% 116 3% 3,690 3% 

No Leasing (Administrative) 5,098 9% 182 5% 3,185 2% 

Leasing, No Surface Occupancy 2,714 5% 50 1% 3,120 2% 

Leasing, Cumulative Timing Limitations on Drilling >9 Months 25 0% 3 0% 114 0% 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 2,521 4% 250 6% 5,549 4% 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 5,442 9% 528 14% 20,401 15% 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 697 1% 8 0% 733 1% 

Leasing, Controlled Surface Use 3,753 6% 221 6% 6,080 4% 

10. Leasing, Standard Lease Terms 23,091 39% 2,198 57% 86,566 63% 

Total, Federal Lands Including Split Estate 59,416 100% 3,854 100% 138,472 100% 

Total Non-Federal 44,256 2,455 87,668 

Total Study Area 103,672 6,309 226,141 

* Comprising oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels Small rounding errors 

** Comprising associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet may be present 

Closed to leasing 21,173 36% 596 15% 15,910 11% 

Leasing with restrictions 15,152 26% 1,060 28% 35,997 26% 

Leasing with standard lease terms 23,091 39% 2,198 57% 86,566 63% 

Table 3a Summary of All EPCA Inventory Areas – Oil and Natural Gas Resources Affected by Access Categories 

Constrained 

1. 

2. 

3. 

4. 

5. 

6. 

7. 

8. 

9. 

Less 

Constrained 

Results

Section 3

3-5
Results

Section 3

Percent of Federal and Split Estate Lands 

1% 

<1% 

4% 

5% 

9% 

10% 

17% 

39% 

6% 

9% 

No Leasing (Statutory/Executive Order)

No Leasing (Administrative, Pending Land Use Plan)

No Leasing (Administrative)

Leasing, No Surface Occupancy 

Leasing, Cumulative Timing Limitations on Drilling >9 Months 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

Leasing, Controlled Surface Use 

Leasing, Standard Lease Terms 

Percent of Natural Gas Resources 

Percent of Oil Resources 

3% 

8% 

5% 

7% 

<1% 

14% 

6% 

57% 

1% 

<1% 

3% 

2% 

2% 

<1% 

4% 

7% 

4% 

15% 

63% 

1% 

Figure 3a Summary of All EPCA Inventory Areas – Oil and Natural Gas Resources Affected by Access Categories 

3-6 
Level 

Area Resources 

Total Liquids* Total Natural Gas** 

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

1. No Leasing (Statutory/Executive Order), (NLS) 5,309 30% 66 15% 540 1% 

2. No Leasing (Administrative), (NLA/LUP) 2,050 12% 4 1% 1 0% 

3. No Leasing (Administrative), (NLA) 2,690 15% 68 16% 647 2% 

4. Leasing, No Surface Occupancy (NSO) 196 1% 6 1% 67 0% 

5. Leasing, Cumulative Timing Limitations on Drilling >9 Months (TLs >9) 0 0% 0 0% 0 0% 

6. Leasing, Cumulative Timing Limitations on Drilling 6-9 Months (TLs 6-9) 95 1% 4 1% 402 1% 

7. Leasing, Cumulative Timing Limitations on Drilling 3-6 Months (TLs 3-6) 764 4% 33 8% 4,015 11% 

8. Leasing, Cumulative Timing Limitations on Drilling <3 Months (TLs <3) 23 0% 1 0% 10 0% 

9. Leasing, Controlled Surface Use (CSU) 542 3% 23 5% 1,789 5% 

10. Leasing, Standard Lease Terms (SLTs) 5,960 34% 224 52% 28,869 79% 

Total, Federal Lands Including Split Estate 17,628 100% 430 100% 36,340 100% 

Total Non-Federal 11,040 404 36,142

Total Study Area 28,669 834 72,482 

* Comprising oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels 

** Comprising associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet 

Closed to leasing 10,048 

Leasing with restrictions 1,620 

Leasing with standard lease terms 5,960 

57% 138 32% 1,187 3% 

9% 68 16% 6,283 17% 

34% 224 52% 28,869 79% 

Table 3b Results–Land and Resources Categorization, Paradox/San Juan Study Areas 

Results

Section 3

3-7
Results

Section 3 

1% 

1% 

2% 

<1% 

5% 

8% 

0% 

16% 

15% 

52% 

0% 

<1% 

4% 

34% 

15% 

12% 

30% 

1% 

3% 

1% 

No Leasing (Statutory/Executive Order) 

No Leasing (Administrative, Pending Land Use Plan) 

No Leasing (Administrative) 

Leasing, No Surface Occupancy 

Leasing, Cumulative Timing Limitations on Drilling >9 Months 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

Leasing, Controlled Surface Use 

Leasing, Standard Lease Terms 

Percent of Federal and Split Estate Lands 

Percent of Oil Resources 

<1% 

<1% 

11% 

5% 

79% 

1% 

2% 

<1% 

2% 0% 

Percent of Natural Gas Resources 

Figure 3b Chart of Results–Land and Resources Categorization, Paradox/San Juan Study Area 

3-8 
Level 

Area Resources 

Total Liquids* Total Natural Gas** 

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

1. No Leasing (Statutory/Executive Order), (NLS) 1,661 12.1% 13 5.8% 661 4.1% 

2. No Leasing (Administrative), (NLA/LUP) 644 4.7% 1 0.6% 149 0.9% 

3. No Leasing (Administrative), (NLA) 419 3.1% 0 0.2% 81 0.5% 

4. Leasing, No Surface Occupancy (NSO) 1,268 9.3% 8 3.6% 2,433 15.1% 

5. Leasing, Cumulative Timing Limitations on Drilling >9 Months (TLs >9) 0 0.0% 0 0.0% 0 0.0% 

6. Leasing, Cumulative Timing Limitations on Drilling 6-9 Months (TLs 6-9) 238 1.7% 1 0.5% 86 0.5% 

7. Leasing, Cumulative Timing Limitations on Drilling 3-6 Months (TLs 3-6) 1,314 9.6% 4 2.0% 1,652 10.2% 

8. Leasing, Cumulative Timing Limitations on Drilling <3 Months (TLs <3) 538 3.9% 2 0.8% 585 3.6% 

9. Leasing, Controlled Surface Use (CSU) 1,381 10.1% 4 1.7% 1,232 7.6% 

10. Leasing, Standard Lease Terms (SLTs) 6,231 45.5% 186 84.8% 9,255 57.4% 

Total, Federal Lands Including Split Estate 13,694 100.0% 220 100.0% 16,135 100.0% 

Total Non-Federal 5,252 184 12,708

Total Study Area 18,945 404 28,843 

* including oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels Small rounding errors 

** including associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet may be present 

Table 3c Results–Land and Resources Categorization, Uinta/Piceance Study Area 

Results

Section 3

3-9
Percent of Federal and Split Estate Lands No Leasing (Statutory/Executive Order) 

Results 

Section 3

46% 

10% 4% 

10% 

9% 

5% 

12% 

No Leasing (Administrative, Pending Land Use Plan)

No Leasing (Administrative)

Leasing, No Surface Occupancy

Leasing, Cumulative Timing Limitations on Drilling >9 Months

3% Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

0% Leasing, Controlled Surface Use 

2% Leasing, Standard Lease Terms 

Percent of Oil Resources Percent of Natural Gas Resources 

1% 

1% 

1% 

56% 

8% 

4% 

10% 

15% 

4% 

<1% 

1% 

0% 

2% 

1% 

85% 

4% 6% 

2% 

<1% 1% 

Figure 3c Chart of Results–Land and Resources Categorization, Uinta/Piceance Study Area 

3-10 
3.0 

Level 

Area Resources 

Total Liquids* Total Natural Gas** 

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

1. No Leasing (Statutory/Executive Order), (NLS) 638 5.5% 135 6.6% 4,598 6.4% 

2. No Leasing (Administrative), (NLA/LUP) 461 4.0% 37 1.8% 702 1.0% 

3. No Leasing (Administrative), (NLA) 1,058 9.2% 86 4.2% 2,046 2.9% 

4. Leasing, No Surface Occupancy (NSO) 266 2.3% 12 0.6% 175 0.2% 

5. Leasing, Cumulative Timing Limitations on Drilling >9 Months (TLs >9) 8 0.1% 3 0.1% 107 0.1% 

6. Leasing, Cumulative Timing Limitations on Drilling 6-9 Months (TLs 6-9) 992 8.6% 110 5.3% 4,055 5.7% 

7. Leasing, Cumulative Timing Limitations on Drilling 3-6 Months (TLs 3-6) 2,369 20.5% 437 21.3% 14,117 19.7% 

8. Leasing, Cumulative Timing Limitations on Drilling <3 Months (TLs <3) 64 0.6% 4 0.2% 104 0.1% 

9. Leasing, Controlled Surface Use (CSU) 536 4.6% 69 3.4% 2,076 2.9% 

10. Leasing, Standard Lease Terms (SLTs) 5,159 44.7% 1,162 56.5% 43,565 60.9% 

Total, Federal Lands Including Split Estate 11,551 100.0% 2,055 100.0% 71,546 100.0% 

Total Non-Federal 5,033 832 25,747

Total Study Area 16,583 2,887 97,293 

* including oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels Small rounding errors 

** including associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet may be present 

Table 3d Results–Land and Resources Categorization, Greater Green River Study Area 

Results

Section 3

3-11
Percent of Federal and Split Estate Lands No Leasing (Statutory/Executive Order)

No Leasing (Administrative, Pending Land Use Plan)

2% 

6% 4% 

9% 

9% 

5% 

21% 

45% 

Results 

Section 3

No Leasing (Administrative)

Leasing, No Surface Occupancy

Leasing, Cumulative Timing Limitations on Drilling >9 Months

<1% 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

Leasing, Controlled Surface Use 

Leasing, Standard Lease Terms 

1% Percent of Natural Gas Resources 

Percent of Oil Resources 

1% 

3% 

2% 

4% 

<1% 

7% <1%

5% 

21% 57% 

3% 

<1% 

3% 

1% 

<1% 

<1% 

6% 

6% 

20% 61% 

Figure 3d Chart of Results–Land and Resources Categorization, Greater Green River Study Area 

3-12 
Level 

Area Resources 

Total Liquids* Total Natural Gas** 

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

1. No Leasing (Statutory/Executive Order), (NLS) 109 1% 0 0.0% 26 0.3% 

2. No Leasing (Administrative), (NLA/LUP) 1,006 9% 17 1.7% 570 7.0% 

3. No Leasing (Administrative), (NLA) 335 3% 18 1.9% 165 2.0% 

4. Leasing, No Surface Occupancy (NSO) 644 6% 17 1.7% 178 2.2% 

5. Leasing, Cumulative Timing Limitations on Drilling >9 Months (TLs >9) 1 0% 0 0.0% 1 0.0% 

6. Leasing, Cumulative Timing Limitations on Drilling 6-9 Months (TLs 6-9) 1,122 10% 133 13.6% 961 11.8% 

7. Leasing, Cumulative Timing Limitations on Drilling 3-6 Months (TLs 3-6) 870 8% 52 5.3% 545 6.7% 

8. Leasing, Cumulative Timing Limitations on Drilling <3 Months (TLs <3) 3 0% 1 0.1% 4 0.1% 

9. Leasing, Controlled Surface Use (CSU) 1,092 10% 121 12.4% 884 10.8% 

10. Leasing, Standard Lease Terms (SLTs) 5,511 52% 620 63.3% 4,824 59.1% 

Total, Federal Lands Including Split Estate 10,693 100% 979 100% 8,157 100% 

Total Non-Federal 17,102 856 10,728

Total Study Area 27,796 1,835 18,885 

* Comprising oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels 

** Comprising associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet 

Closed to leasing 1,450 

Leasing with restrictions 3,733 

Leasing with standard lease terms 5,511 

14% 36 4% 761 9% 

35% 324 33% 2,572 32% 

52% 620 63% 4,824 59% 

Table 3e. Results–Land and Resources Categorization, Powder River Study Area 

Results

Section 3

3-13
Results 

Section 3

Percent of Federal and Split Estate Lands No Leasing (Statutory/Executive Order) 

1% 

9% 

3% 

6% 

11% 

8% 

<1% 

10% 

52% 

No Leasing (Administrative, Pending Land Use Plan)

No Leasing (Administrative)

Leasing, No Surface Occupancy

Leasing, Cumulative Timing Limitations on Drilling >9 Months <1% 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

Leasing, Controlled Surface Use 

Leasing, Standard Lease Terms 

Percent of Natural Gas Resources Percent of Oil Resources 

2% 2% 

<1% 

14% 

5% 

12% 

63% 

2% 

<1% 

<1% 

<1% 

12% 

11% 

59% 

2% 

2% 

7% 

<1% 

7% 

<1% 

Figure 3e. Chart of Results–Land and Resources Categorization, Powder River Study Area 

3-14 
Level 

Area Resources 

Total Liquids* Total Natural Gas** 

Percent of Percent of Percent of 

Access Category (acres x1000) Federal (MMBbl)*** Federal (Bcf)**** Federal 

1. No Leasing (Statutory/Executive Order), (NLS) 2,351 40.2% 83 49.2% 3,210 51.0% 

2. No Leasing (Administrative), (NLA/LUP) 1,846 31.6% 57 33.4% 2,269 36.0% 

3. No Leasing (Administrative), (NLA) 597 10.2% 9 5.2% 247 3.9% 

4. Leasing, No Surface Occupancy (NSO) 340 5.8% 7 3.9% 266 4.2% 

5. Leasing, Cumulative Timing Limitations on Drilling >9 Months (TLs >9) 16 0.3% 0 0.1% 6 0.1% 

6. Leasing, Cumulative Timing Limitations on Drilling 6-9 Months (TLs 6-9) 74 1.3% 1 0.6% 45 0.7% 

7. Leasing, Cumulative Timing Limitations on Drilling 3-6 Months (TLs 3-6) 124 2.1% 3 1.5% 72 1.1% 

8. Leasing, Cumulative Timing Limitations on Drilling <3 Months (TLs <3) 69 1.2% 1 0.4% 29 0.5% 

9. Leasing, Controlled Surface Use (CSU) 203 3.5% 4 2.3% 99 1.6% 

10. Leasing, Standard Lease Terms (SLTs) 230 3.9% 6 3.4% 52 0.8% 

Total, Federal Lands Including Split Estate 5,849 100.0% 170 100.0% 6,294 100.0% 

Total Non-Federal 5,829 179 2,344

Total Study Area 11,678 348 8,638 

* including oil, NGLs and liquids associated with natural gas reservoirs ***MMBbl -- Millions of Barrels Small rounding errors 

** including associated dissolved and nonassociated natural gas ****Bcf -- Billion cubic feet may be present 

Table 3f. Results–Land and Resources Categorization, Montana Thrust Belt Study Area 

Results

Section 3

3-15
Results 

Section 3

Percent of Federal and Split Estate Lands No Leasing (Statutory/Executive Order) 

1% 4% 

2% 

1% 

<1% 4% 

6% 

10% 

32% 

40% 

No Leasing (Administrative, Pending Land Use Plan) 

No Leasing (Administrative) 

Leasing, No Surface Occupancy 

Leasing, Cumulative Timing Limitations on Drilling >9 Months 

Leasing, Cumulative Timing Limitations on Drilling 6-9 Months 

Leasing, Cumulative Timing Limitations on Drilling 3-6 Months 

Leasing, Cumulative Timing Limitations on Drilling <3 Months 

Leasing, Controlled Surface Use 

Leasing, Standard Lease Terms 

Percent of Natural Gas Resources Percent of Oil Resources 1% 

2% 

51% 

36% 

4% 

4% 

2% 

<1% 

1% 1% 

1% 

2% 

1% 

<1% 

<1% 

3% 

4% 

5% 

33% 

49% 

Figure 3f. Chart of Results–Land and Resources Categorization, Montana Thrust Belt Study Area 

3-16 
Section 3

Results

Figure 3g Land Access Categorization Map – Paradox/San Juan Study Areas 

3-17 
Section 3

Results

Figure 3h Land Access Categorization – Uinta/Piceance Study Areas 

3-18 
Section 3

Results

Figure 3i Land Access Categorization – Greater Green River Study Area 

3-19 
Section 3

Results

Figure 3j Land Access Categorization – Powder River Study Area 

3-20
Section 3

Results

Figure 3k Land Access Categorization – Montana Thrust Belt Study Area 

3-21 
Section 3 

Results 

Figure 3l Access Map, Total Liquids – Paradox/San Juan Study Areas – Categories 1-10

3-22
Section 3 

Results 

Figure 3m Access Map, Total Liquids – Uinta/Piceance Study Areas - Categories 1-10

3-23
Section 3 

Results 

Figure 3n Access Map, Total Liquids – Greater Green River Study Area- Categories 1-10

3-24
Section 3 

Results 

Figure 3o Access Map, Total Liquids – Powder River Study Area - Categories 1-10

3-25 
Section 3 

Results 

Figure 3p Access Map, Total Liquids – Montana Thrust Belt Study Area - Categories 1-10

3-26
Section 3 

Results 

Figure 3q Access Map, Total Gas – Paradox/San Juan Study Areas - Categories 1-10

3-27
Section 3 

Results 

Figure 3r Access Map, Total Gas – Uinta/Piceance Study Areas - Categories 1-10

3-28
Section 3 

Results 

Figure 3s Access Map, Total Gas – Greater Green River Study Area - Categories 1-10

3-29 
Section 3 

Results 

Figure 3t Access Map, Total Gas – Greater Green River Study Area - - Categories 2-10

3-30 
Section 3 

Results 

Figure 3u Access Map, Total Gas – Greater Green River Study Area - Categories 3-10

3-31
Section 3 

Results 

Figure 3v Access Map, Total Gas – Greater Green River Study Area - Categories 4-10

3-32
Section 3 

Results 

Figure 3w Access Map, Total Gas – Greater Green River Study Area - Categories 5-10

3-33
Section 3 

Results 

Figure 3x Access Map, Total Gas, Greater Green River Study Area - Categories 6-10

3-34
Section 3 

Results 

Figure 3y Access Map, Total Gas – Greater Green River Study Area - Categories 7-10

3-35
Section 3 

Results 

Figure 3z Access Map, Total Gas – Greater Green River Study Area- Categories 8-10

3-36
Section 3

Results

 Figure 3aa Access Map, Total Gas – Greater Green River Study Area - Categories 9-10 

3-37
Section 3 

Results 

Figure 3ab Access Map, Total Gas -- Greater Green River Study Area - Category 10

3-38
Section 3 

Results 

Figure 3ac Access Map, Total Gas -- Powder River Study Area - Categories 1-10

3-39 
Section 3 

Results 

Figure 3ad Access Map, Total Gas – Montana Thrust Belt Study Area - Categories 1-10

3-40