1. U.S. Upstream Almanac
January 2011

2. U.S. Upstream Almanac
January 2011
Table of Contents
1. Introduction 4
2. Continental United States 8
3. Rocky Mountain Region 30
4. Alaska Region 159
5. Offshore GoM Region 173
6. Gulf Coast Region 187
7. Mid-Continent Region 208
8. Permian Region 283
9. Ark-LA-Tex Region 291
10. Central Texas Region 312
11. West Coast Region 333
12. Eastern U.S. Region 374
13. Offshore Pacific Region 404
Data Source: HPDI, LLC. Production data as of August 2010; permitting data as of January 2011
U.S. Upstream Almanac
January 2011 2

3. Introduction
U.S. Upstream Almanac
January 2011

4. Introduction
Key Themes
Oil Plays Are Being Targeted1
As the oil price/gas price
26.00x 8.0 80%
ratio has climbed from 8x
to nearly 26x, drillers
have progressively 7.0
focused more efforts to
6.4 6.5
oil-rich plays 6.3
6.1
21.00x 6.0 5.7 70%
The graph at right 5.5
compares:
Total oil and gas wells
% Gas of Total Wells Drilled
4.7
drilled (blue/gray 4.6
Oil Price / Gas Price
4.5
Wells Drilled (000's)
bars)
The percentage of 16.00x 4.0
3.9 3.9
60%
wells drilled targeting 3.6
gas (red line) 3.3
3.1
The oil/gas price ratio 2.9
(blue line)
Gas plays are clearly 11.00x 2.0 50%
losing favor as gas wells
have dropped from ~75%
of total wells drilled in Q1
2007 to ~45% in Q4 2010
6.00x 0.0 40%
2007 Q1
2007 Q2
2007 Q3
2007 Q4
2008 Q1
2008 Q2
2008 Q3
2008 Q4
2009 Q1
2009 Q2
2009 Q3
2009 Q4
2010 Q1
2010 Q2
2010 Q3
2010 Q4
Gas Wells Drilled Oil Wells Drilled % Gas Wells Oil Price / Gas Price
________________________________________
U.S. Upstream Almanac 1. Wells drilled are based on permits "At Total Depth" with timing based on permit granted date. Only wells classified as "Oil", "Gas" or 4
"CBM" are included (i.e., well types including Injection, CO2, Oil & Gas, Unclassified, etc. were excluded)
January 2011

5. Introduction
Key Themes (cont'd)
Horizontal Wells Are Increasing1
9,000 90%
As horizontal drilling
8,149
8,121
techniques are refined
8,049
7,950
and optimized, an
7,559
7,413
increasing proportion of
7,351
7,151
wells drilled are utilizing
6,988
6,840
this technology
6,643
Since Q1 2006, horizontal
wells have increased from 6,000 60%
9% of total wells drilled to
5,034
34% Q4 2010
4,493
Wells Drilled
4,331
% of Total
In the same time period,
4,040
vertical wells have
3,631
dropped from 81% of
3,351
3,275
3,139
total wells drilled to 57%
2,891
3,000 30%
2,458
2,289
2,143
2,122
2,093
1,986
1,932
1,765
1,758
1,650
1,616
1,521
1,408
1,323
1,320
1,201
1,102
1,041
1,008
903
0 0%
2006 Q1
2006 Q2
2006 Q3
2006 Q4
2007 Q1
2007 Q2
2007 Q3
2007 Q4
2008 Q1
2008 Q2
2008 Q3
2008 Q4
2009 Q1
2009 Q2
2009 Q3
2009 Q4
2010 Q1
2010 Q2
2010 Q3
2010 Q4
Horizontal Vertical % Horizontal % Vertical
________________________________________
U.S. Upstream Almanac 1. Wells drilled are based on permits "At Total Depth" with timing based on permit granted date. Directional are not shown on graph but 5
are included in "% of Total" calculations
January 2011

6. Introduction
Key Themes (cont'd)
Top Horizontal Plays
1,353
Barnett 0.45x
The Barnett Shale 3,030
retained the top spot for 970
Marcellus 10.66x
horizontally drilled 91
formation, but also came 820
Haynesville 7.39x
up the biggest loser in 111
terms of growth Fayetteville
812
0.88x
928
The Eagleford, Niobrara, 724
Marcellus and Haynesville Eagleford 45.25x
16
shales showed the largest 575
Bakken 0.97x
two-year growth, with 591
multiples ranging from 280
Woodford 1.07x
10x to 45x from 2008 to 261
2010 181
Cleveland 1.01x
180
Moderate gains were
171
seen in the Granite Wash, Granite Wash
61
2.80x
Bone Spring, 120
Mississippian and Bone Spring 3.53x
34
Spraberry Wolfcamp 102
Austin Chalk 0.80x
formations 128
95
The Bakken, Woodford Niobrara 13.57x
7
and Cleveland held
93
relatively flat, while the Mississippi
24
3.88x
Fayetteville, Austin Chalk
83
and Cotton Valley showed Spraberry Wolfcamp
66
1.26x
negative growth 80
Cotton Valley 2010 2008 0.68x
118
0 500 1,000 1,500 0.00x 10.00x 20.00x 30.00x 40.00x 50.00x
Horizontal Wells Drilled Two-Year Growth (2008-2010)
________________________________________
U.S. Upstream Almanac 1. Wells drilled are based on permits "At Total Depth" with timing based on permit granted date. 6
January 2011

7. Introduction
Key Themes (cont'd)
Top Horizontal Areas
3,468
TX 0.84x
Texas retained the top 4,114
spot by a wide margin for 1,005
ND 1.45x
horizontal wells drilled, 691
but came up a loser in 923
OK 1.02x
terms of growth 908
911
The biggest growth LA
169
5.39x
occurred in Colorado, 881
Pennsylvania, Louisiana PA 5.76x
153
and New Mexico driven by 822
AR 0.86x
the Niobrara, Marcellus, 959
Haynesville and Bone 239
NM 2.37x
Spring/Spraberry, 101
respectively 150
KY 0.70x
215
118
WV 1.01x
117
107
CO 7.13x
15
74
MT 1.14x
65
55
WY 1.53x
36
43
IN 1.65x
26
20
MS 0.63x
32
19
MI 2010 2008 0.34x
56
0 1,500 3,000 4,500 0.00x 5.00x 10.00x
Horizontal Wells Drilled Two-Year Growth (2008-2010)
________________________________________
U.S. Upstream Almanac 1. Wells drilled are based on permits "At Total Depth" with timing based on permit granted date. 7
January 2011

8. Introduction
Presentation Guide
Organization & Flow Standard Slides
Integral Advisors' US Upstream Almanac is a comprehensive
Introduction Slide
analysis of drilling and permitting data, providing key insights that
Key information
oil & gas professionals find useful
Top producers and permitters
The Almanac is organized in order of increased detail, beginning Well & permit activity map
with the Continental United States, followed by Regions, and
ending with Basins.
Integral worked with our data provider HPDI, LLC (www.hpdi.com)
to parse production and permitting data out into 54 specific basins, Vintaged Rate & Well Additions
which Integral has further grouped in 12 regions Production and well additions by year
since 2001
There are two key data sets in the Almanac: Data parsed by gas, oil and total
Historical Activity: Historical production and well additions are equivalent
broken out by oil and gas, and top operators are ranked over
the last twelve month ("LTM") time period
Future Activity: Permitting activity is broken out by operator
Quarterly Permits
and targeted formation
Top formations permitted over last 5
years
Continental United States Shown quarterly on graph, with
annual data below
Regions (12)
(Rockies, Alaska, Offshore GoM, etc.)
Tabular Data
Basins (54) Top producers and permitters shown
(Green River, DJ, for last twelve months ("LTM")
Sacramento, etc.)
U.S. Upstream Almanac
January 2011 8

9. Continental United States
U.S. Upstream Almanac
January 2011

10. INSERT 11X17 MAP FOLDED HERE
U.S. Upstream Almanac
January 2011 10

11. Continental United States
Overview
Continental U.S. Summary
Production Statistics Top Operators by Production (LTM)
Wells Drilled: 2,800,000+ BP AMERICA PRODUCTION COMPANY 15,533
EXXON MOBIL CORPORATION 6,156
First Reported Production: 1900
CONOCOPHILLIPS COMPANY 5,053
% Gas (LTM Production): 69% CHEVRON, U.S.A., INC. 4,654
Cum. Production: 891.8 Tcf (gas) & 116,799 MMBbl (oil) CHESAPEAKE ENERGY CORPORATION 3,860
No. Active Wells: 954,541 ANADARKO PETROLEUM CORPORATION 3,490
DEVON ENERGY CORPORATION 2,708
Avg. Daily Production (LTM): 99,867 MMcfepd
RD SHELL 2,572
Implied Prod. / Active Well: 105 Mcfepd ENCANA CORPORATION 2,539
OCCIDENTAL ENERGY COMPANY,INC. 2,430
Incremental Wells Drilled APACHE CORPORATION 2,006
EOG RESOURCES INCORPORATED 1,992
60,000 80% SOUTHWESTERN ENERGY COMPANY 1,391
49,716 75% THE WILLIAMS COMPANIES, INC 1,323
50,000
44,255 44,261 QUESTAR CORPORATION 1,070
70%
AERA ENERGY SERVICES COMPANY
Incremental Wells Drilled
38,757 966
40,000
33,271 65% EL PASO CORPORATION 888
% Gas Wells
31,373
29,787 SAMSON OIL & GAS USA INC 887
30,000 27,346 27,136 60%
24,041 BHP BILLITON 865
55% NEWFIELD EXPLORATION COMPANY 819
20,000
MERIT ENERGY COMPANY 771
50%
SANDRIDGE ENERGY, INC. 769
10,000
45% NOBLE ENERGY, INC. 763
KINDER MORGAN INCORPORATED 762
0 40%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 PIONEER NATURAL RESOURCES COMPANY 742
Annualized
0 5,000 10,000 15,000 20,000
Gas Oil % Gas MMcfepd
U.S. Upstream Almanac
January 2011 11

12. Continental United States
Production & Well Additions
Rate & Annual Well Additions by Year (Gross)
7 14,533 16,000
6 14,000
Incremental Oil Wells
10,365 10,602 10,93512,000
5 9,705
Oil (MMBopd)
9,046
10,000
4 7,767 7,766
7,078
6,259 8,000
3
6,000
2 4,000
1 2,000
0 0
80 35,183 40,000
33,890 33,659
70 35,000
29,052
Incremental Gas Wells
60 25,505 30,000
Gas (Bcfpd)
23,606 22,709
50 21,087 25,000
18,090
40 20,000
13,106
30 15,000
20 10,000
10 5,000
0 0
120 60,000
49,716
100 44,255 44,261 50,000
Total Incremental Wells
Total (Bcfepd)
38,757
80 33,271 40,000
31,373 29,787
27,346 27,136
60 24,04130,000
40 20,000
20 10,000
0 0
Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10
Prior Years 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Wells Drilled
U.S. Upstream Almanac
January 2011 12

13. Continental United States
Quarterly Permits by Region
Summary
x x
23,069
23,239
25,000
20,136
20,117
20,035
19,663
19,579
19,403
18,948
18,829
17,972
17,912
16,893
15,935
20,000
15,680
14,769
13,485
12,265
12,230
11,246
15,000
10,000
5,000
0
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
2006 2007 2008 2009 2010
No. % No. % No. % No. % No. %
Rocky Mountain 17,026 22.1% 15,633 20.6% 17,384 20.2% 9,592 19.5% 12,982 20.5%
Eastern U.S. 15,932 20.6% 15,373 20.3% 16,890 19.6% 11,295 22.9% 10,707 16.9%
Mid-Continent 12,827 16.6% 12,414 16.4% 14,480 16.8% 7,129 14.5% 9,838 15.5%
Permian 7,919 10.3% 7,775 10.3% 9,745 11.3% 5,556 11.3% 9,796 15.5%
Gulf Coast 7,407 9.6% 7,106 9.4% 7,689 8.9% 4,373 8.9% 6,324 10.0%
Ark-La-Tex 6,081 7.9% 6,382 8.4% 6,903 8.0% 4,074 8.3% 4,422 7.0%
West Coast 5,577 7.2% 5,617 7.4% 6,603 7.7% 3,930 8.0% 5,512 8.7%
Central Texas 4,007 5.2% 5,040 6.7% 5,950 6.9% 2,930 6.0% 3,441 5.4%
Alaska 185 0.2% 175 0.2% 196 0.2% 182 0.4% 175 0.3%
Offshore Gom 212 0.3% 208 0.3% 166 0.2% 165 0.3% 80 0.1%
Total 77,173 100.0% 75,723 100.0% 86,006 100.0% 49,226 100.0% 63,277 100.0%
x
U.S. Upstream Almanac
January 2011 13

14. Continental United States
Data by Region
Gross Production by Region Permits by Region
LTM Production
Active Total % of LTM Permits
Rank Region Wells (Mcfepd) Total % Gas Rank Region Drilling Permit'd Drilled Total
1 ROCKIES 131,626 19,178,088 19.1% 80% 1 Rocky Mountain 220 7,935 4,827 12,982
2 OFFSHORE GOM 4,404 16,002,251 15.9% 40% 2 Eastern U.S. 103 8,302 2,302 10,707
3 ALASKA 1,858 12,291,956 12.2% 71% 3 Mid-Continent 95 4,712 5,031 9,838
4 MID-CON 148,532 10,909,741 10.8% 83% 4 Permian 124 3,164 6,508 9,796
5 PERMIAN 124,539 10,175,647 10.1% 46% 5 Gulf Coast 65 3,187 3,072 6,324
6 GULF COAST 49,651 9,780,578 9.7% 73% 6 West Coast 22 3,123 2,367 5,512
7 ARK-LA-TEX 62,078 9,411,247 9.3% 93% 7 Ark-La-Tex 81 2,457 1,884 4,422
8 CENTRAL TEXAS 50,568 5,570,803 5.5% 94% 8 Central Texas 41 1,273 2,127 3,441
9 WEST COAST 48,634 3,980,601 4.0% 17% 9 Alaska 1 80 94 175
10 EASTERN U.S. 129,457 2,882,520 2.9% 91% 10 Offshore Gom 4 28 48 80
11 OFFSHORE PACIFIC 387 479,864 0.5% 24% 11 Offshore Pacific 0 0 0 0
Total 751,735 100,663,296 100.0% 68% Total 756 34,261 28,260 63,277
U.S. Upstream Almanac
January 2011 14

15. Continental United States
Production by Region
Annual Production by Region
Annual Production Three-Year Compound Annual Growth Rate
19,178
ROCKIES ROCKIES 3%
17,322
16,002
OFFSHORE GOM OFFSHORE GOM 2%
15,295
12,292
ALASKA ALASKA (4%)
14,060
10,910
MID-CON MID-CON 5%
9,384
10,176
PERMIAN PERMIAN (0%)
10,244
9,781
GULF COAST GULF COAST (6%)
11,778
9,411
ARK-LA-TEX ARK-LA-TEX 10%
6,979
5,571
CENTRAL TEXAS CENTRAL TEXAS 21%
3,118
3,981
WEST COAST WEST COAST (4%)
4,503
2,883
EASTERN U.S. EASTERN U.S. (3%)
3,123
480
OFFSHORE PACIFIC LTM LTM-3 OFFSHORE PACIFIC (6%)
582
0 5,000 10,000 15,000 20,000 25,000 (10%) (5%) 0% 5% 10% 15% 20% 25%
MMcfepd 3 Year Compound Annual Growth Rate
U.S. Upstream Almanac
January 2011 15

16. Continental United States
Production by Basin
Annual Production and 3-Year CAGR by Basin (1 – 27) Annual Production and 3-Year CAGR by Basin (28 – 54)
ARCTIC SLOPE 11,872 (4%) RATON 421 4%
GOM - DEEPWATER 10,742 9% COOK INLET 420 (9%)
PERMIAN 10,176 33% POWDER RIVER… 292 (6%)
TX & LA GULF COAST 8,679 (7%) CENTRAL KANSAS… 281 1%
ANADARKO 5,542 (1%) BIG HORN 265 (6%)
FT WORTH 5,407 22% BLACK WARRIOR 250 (5%)
GOM - SHELF 5,260 (9%) SACRAMENTO 187 (2%)
EAST TEXAS 5,247 4% SEDGWICK 165 2%
GREEN RIVER 4,573 5% OUACHITA FOLDED… 164 12%
ARKLA 4,164 23% CHEROKEE 156 7%
SAN JUAN 3,588 (4%) VENTURA 147 (0%)
ARKOMA 3,317 31% PARADOX 137 (11%)
SAN JOAQUIN 2,951 (5%) COASTAL… 103 21%
WILLISTON 2,514 13% SANTA BARBARA 74 (1%)
APPALACHIAN 2,116 (2%) SWEET GRASS ARCH 65 (11%)
PICEANCE 1,974 12% LAS ANIMAS ARCH 64 2%
POWDER RIVER CBM 1,522 10% PALO DURO 50 (6%)
UINTA 1,395 5% WASATCH UPLIFT 46 13%
MS & AL GULF COAST 1,101 (0%) CENTRAL MT UPLIFT 38 (11%)
DENVER JULESBURG 1,047 5% NEMAHA ANTICLINE 30 1%
CHAUTAUQUA 802 2% FOREST CITY 22 (1%)
WIND RIVER 632 (5%) CHADRON ARCH 20 4%
CEN. W. O'THRUST 578 (3%) FLORIDA PLATFORM 10 (16%)
S. OK FOLDED BELT 539 (10%) GREAT BASIN 5 (5%)
LOS ANGELES 516 (3%) SALINA 4 7%
MICHIGAN 507 (5%) N. CALIFORNIA 2 (9%)
PACIFIC OFFSHORE 480 125% NORTH PARK 1 101%
0 5,000 10,000 15,000 (20%) 0% 20% 40% 0 250 500 (20%) 0% 20% 40%
MMcfepd MMcfepd
3-Year Compound Annual Growth Rate 3-Year Compound Annual Growth Rate
U.S. Upstream Almanac ROCKIES WEST COAST EASTERN U.S. MID-CON ARK-LA-TEX OFFSHORE GOM
January 2011 CENTRAL TEXAS ALASKA GULF COAST PERMIAN OFFSHORE PACIFIC Total
16

17. Continental United States
Permits by Region
Annual Permits by Region
Annual Permits Annual Increase / (Decrease)
12,929
Rocky Mountain Rocky Mountain 75%
7,379
10,707
Eastern U.S. Eastern U.S. 26%
8,485
9,891
Mid-Continent Mid-Continent 57%
6,303
9,796
Permian Permian 96%
4,989
6,324
Gulf Coast Gulf Coast 76%
3,591
5,512
West Coast West Coast 76%
3,132
4,422
Ark-La-Tex Ark-La-Tex 31%
3,370
3,441
Central Texas Central Texas 33%
2,591
175
Alaska Alaska 2%
172
80
Offshore Gom Offshore Gom (44%)
144
0
Offshore Pacific Offshore Pacific 0%
NA
0 2010 2009
0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 (60%) (40%) (20%) 0% 20% 40% 60% 80% 100% 120%
U.S. Upstream Almanac
January 2011 17

18. Continental United States
Permits by Basin
Annual Production and 3-Year CAGR by Basin (1 – 24) Annual Production and 3-Year CAGR by Basin (25 – 49)
Appalachian 10,035 25% Sedgwick Basin 304 91%
Permian Basin 9,796 96% Sacramento 263 8%
Texas & Louisiana Gulf… 5,739 74% Alaska 175 2%
San Joaquin 4,450 85% Black Warrior Basin 165 18%
Ft Worth Basin 3,282 31% Ouachita Folded Belt 159 104%
Denver Julesburg 135% Sweet Grass Arch 147 15%
3,275
Ventura 147 75%
Arkla Basin 3,086 48%
Wind River 121 6%
Anadarko Basin 3,080 69%
Ca Coastal 121 38%
Piceance 2,562 67%
Las Animas Arch 113 98%
Williston 2,395 127%
Santa Barbara 112 45%
Chautauqua Platform 1,558 63%
Palo Duro Basin 108 89%
Arkoma Basin 1,424 10%
Raton 104 197%
East Texas Basin 1,336 3%
Nemaha Anticline 94 45%
Powder River 1,185 114%
Offshore Gom 80 (44%)
Uinta 1,140 26%
Big Horn 68 113%
Green River 1,089 40%
Central Montana Uplift 63 (3%)
Forest City Basin 987 93%
Paradox 59 (12%)
Cherokee Basin 947 49% Chadron Arch 53 56%
Central Kansas Uplift 915 69% Central Western Overthrust 52 27%
Mississippi & Alabama… 585 98% Salina Basin 25 150%
San Juan 532 (7%) Great Basin 9 (53%)
Michigan 507 67% North Park 8 (56%)
Los Angeles 419 74% Park Basin 4 33%
South Oklahoma Folded… 396 82% Wasatch Uplift 3 50%
0 4,000 8,000 12,000 (100%) 0% 100% 200% 0 100 200 300 400 (300%) (150%) 0% 150% 300%
Permits Growth 2009-2010 Permits Growth 2009-2010
U.S. Upstream Almanac ROCKIES WEST COAST EASTERN U.S. MID-CON ARK-LA-TEX OFFSHORE GOM
January 2011 CENTRAL TEXAS ALASKA GULF COAST PERMIAN OFFSHORE PACIFIC Total
18

19. Continental United States
Production by Basin
Gross Production by Basin (1 – 27) Gross Production by Basin (28 – 54)
LTM Production LTM Production
Active Total % of Active Total % of
Rank Basin Wells (Mcfepd) Total % Gas Rank Basin Wells (Mcfepd) Total % Gas
1 ARCTIC SLOPE 1,576 11,871,997 11.8% 70% 28 RATON 3,577 420,546 0.4% 100%
2 GOM - DEEPWATER 516 10,741,938 10.7% 28% 29 COOK INLET 282 419,959 0.4% 86%
3 PERMIAN 124,539 10,175,647 10.1% 46% 30 POWDER RIVER CONVENTIONAL 5,012 292,337 0.3% 22%
4 TEXAS & LOUISIANA GULF COAST 46,032 8,679,393 8.6% 75% 31 CENTRAL KANSAS UPLIFT 10,511 281,381 0.3% 6%
5 ANADARKO 66,716 5,541,774 5.5% 85% 32 BIG HORN 3,175 264,800 0.3% 19%
6 FT WORTH 45,032 5,407,170 5.4% 94% 33 BLACK WARRIOR 4,780 249,998 0.2% 99%
7 GOM - SHELF 3,888 5,260,312 5.2% 66% 34 SACRAMENTO 1,197 186,943 0.2% 100%
8 EAST TEXAS 31,395 5,247,052 5.2% 93% 35 SEDGWICK 5,452 164,843 0.2% 56%
9 GREEN RIVER 10,087 4,573,441 4.5% 95% 36 OUACHITA FOLDED BELT 5,536 163,633 0.2% 88%
10 ARKLA 30,683 4,164,196 4.1% 94% 37 CHEROKEE 13,907 156,256 0.2% 78%
11 SAN JUAN 28,893 3,588,398 3.6% 99% 38 VENTURA 1,524 147,311 0.1% 14%
12 ARKOMA 14,191 3,317,341 3.3% 99% 39 PARADOX 1,133 136,649 0.1% 49%
13 SAN JOAQUIN 40,210 2,951,301 2.9% 14% 40 COASTAL CALIFORNIA 504 102,642 0.1% 4%
14 WILLISTON 9,730 2,513,903 2.5% 19% 41 SANTA BARBARA 958 74,346 0.1% 13%
15 APPALACHIAN 111,157 2,115,654 2.1% 94% 42 SWEET GRASS ARCH 3,718 65,357 0.1% 71%
16 PICEANCE 10,979 1,973,588 2.0% 94% 43 LAS ANIMAS ARCH 1,142 64,031 0.1% 51%
17 POWDER RIVER CBM 15,467 1,521,653 1.5% 100% 44 PALO DURO 1,435 49,966 0.0% 31%
18 UINTA 8,380 1,395,115 1.4% 81% 45 WASATCH UPLIFT 20 45,892 0.0% 0%
19 MISSISSIPPI & ALABAMA GULF COAST 3,619 1,101,185 1.1% 56% 46 CENTRAL MONTANA UPLIFT 967 37,982 0.0% 70%
20 DENVER JULESBURG 23,392 1,047,410 1.0% 67% 47 NEMAHA ANTICLINE 1,995 30,485 0.0% 3%
21 CHAUTAUQUA PLATFORM 18,579 802,241 0.8% 69% 48 FOREST CITY 6,797 22,390 0.0% 6%
22 WIND RIVER 2,735 631,898 0.6% 80% 49 CHADRON ARCH 1,083 20,335 0.0% 15%
23 CENTRAL WESTERN OVERTHRUST 2,041 578,125 0.6% 95% 50 FLORIDA PLATFORM 15 10,221 0.0% 2%
24 SOUTH OKLAHOMA FOLDED BELT 8,753 538,891 0.5% 50% 51 GREAT BASIN 61 5,468 0.0% 0%
25 LOS ANGELES 4,211 515,837 0.5% 9% 52 SALINA 197 4,173 0.0% 0%
26 MICHIGAN 13,505 506,647 0.5% 79% 53 NORTHERN CALIFORNIA 31 2,222 0.0% 100%
27 PACIFIC OFFSHORE 387 479,864 0.5% 24% 54 NORTH PARK 35 1,158 0.0% 13%
Total 751,735 100,663,296 100.0% 68%
U.S. Upstream Almanac
January 2011 19