ALMANAC_TEST

U.S. Upstream Almanac
January 2011

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

January 2011 2

Introduction

January 2011

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

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

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

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

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.)

January 2011 8

Continental United States

January 2011

INSERT 11X17 MAP FOLDED HERE

January 2011 10

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

January 2011 11

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

January 2011 12

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

January 2011 13

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

January 2011 14

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

January 2011 15

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

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%

January 2011 17

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

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%

January 2011 19

Production by Operator
Gross Production by Operator (1 – 35) Gross Production by Operator (36 – 70)
Rank Company Wells (MMcfepd) Total % Gas Rank Company Wells (MMcfepd) Total % Gas
1 BP AMERICA PRODUCTION COMPANY 12,857 15,533 15.43% 67% 36 CONCHO RESOURCES INC. 3,214 450 0.447% 37%
2 EXXON MOBIL CORPORATION 24,163 6,156 6.12% 85% 37 FOREST OIL CORPORATION 2,513 448 0.445% 89%
3 CONOCOPHILLIPS COMPANY 23,204 5,053 5.02% 65% 38 ENERGEN CORPORATION 5,386 438 0.435% 76%
4 CHEVRON, U.S.A., INC. 28,179 4,654 4.62% 36% 39 ENERVEST OPERATING, LLC 12,720 407 0.404% 86%
5 CHESAPEAKE ENERGY CORPORATION 14,836 3,860 3.83% 94% 40 CONTINENTAL RESOURCES, INC. 1,430 401 0.398% 38%
6 ANADARKO PETROLEUM CORPORATION 19,130 3,490 3.47% 78% 41 YATES CO INTERNATIONAL (YATES FAMILY) 3,333 395 0.393% 91%
7 DEVON ENERGY CORPORATION 13,978 2,708 2.69% 93% 42 WHITING PETROLEUM CORPORATION 2,397 381 0.378% 27%
8 RD SHELL 1,221 2,572 2.56% 49% 43 BILL BARRETT CORPORATION 1,807 351 0.349% 94%
9 ENCANA CORPORATION 6,726 2,539 2.52% 96% 44 MARINER ENERGY, INC. 124 341 0.339% 86%
10 OCCIDENTAL ENERGY COMPANY,INC. 18,698 2,430 2.41% 40% 45 MURPHY OIL CORPORATION 98 333 0.331% 19%
11 APACHE CORPORATION 12,082 2,006 1.99% 58% 46 LINN OPERATING, LLC 5,394 329 0.327% 72%
12 EOG RESOURCES INCORPORATED 7,176 1,992 1.98% 75% 47 SM ENERGY COMPANY 1,443 314 0.312% 69%
13 SOUTHWESTERN ENERGY COMPANY 2,388 1,391 1.38% 100% 48 CABOT OIL & GAS CORPORATION 2,440 309 0.307% 95%
14 THE WILLIAMS COMPANIES, INC 7,840 1,323 1.31% 99% 49 QUICKSILVER RESOURCES, INC. 837 306 0.304% 98%
15 QUESTAR CORPORATION 3,549 1,070 1.06% 94% 50 DENBURY RESOURCES INC. 1,272 303 0.301% 12%
16 AERA ENERGY SERVICES COMPANY 11,575 966 0.96% 6% 51 CONSOL GAS COMPANY 4,564 289 0.287% 100%
17 EL PASO CORPORATION 4,961 888 0.88% 90% 52 COMSTOCK RESOURCES 844 275 0.274% 94%
18 SAMSON OIL & GAS USA INC 3,820 887 0.88% 90% 53 W & T OFFSHORE, INC. 188 272 0.270% 53%
19 BHP BILLITON 31 865 0.86% 11% 54 ENCORE ENERGY, INC. 1,839 269 0.267% 26%
20 NEWFIELD EXPLORATION COMPANY 3,151 819 0.81% 79% 55 WALTER OIL & GAS CORPORATION 72 256 0.255% 58%
21 MERIT ENERGY COMPANY 5,249 771 0.77% 75% 56 STONE ENERGY CORPORATION 221 249 0.247% 56%
22 SANDRIDGE ENERGY, INC. 3,596 769 0.76% 79% 57 BERRY PETROLEUM COMPANY 2,146 240 0.238% 43%
23 NOBLE ENERGY, INC. 10,544 763 0.76% 69% 58 ENDEAVOR ENERGY RESOURCES, LP 4,467 234 0.232% 42%
24 KINDER MORGAN INCORPORATED 1,043 762 0.76% 57% 59 MCMORAN EXPLORATION COMPANY 164 234 0.232% 76%
25 PIONEER NATURAL RESOURCES COMPANY 9,454 742 0.74% 74% 60 MEWBOURNE HOLDINGS INC 1,057 218 0.216% 81%
26 AMERADA HESS CORPORATION 848 741 0.74% 37% 61 J-W OPERATING COMPANY 847 214 0.213% 99%
27 ULTRA PETROLEUM 589 734 0.73% 96% 62 CONTANGO OPERATORS, INC. 10 202 0.200% 88%
28 MARATHON OIL COMPANY 3,924 712 0.71% 60% 63 HUNT OIL COMPANY 492 196 0.195% 66%
29 PETROHAWK ENERGY CORPORATION 1,552 695 0.69% 99% 64 MDU RESOURCES 3,148 196 0.195% 84%
30 CIMAREX ENERGY COMPANY 4,140 656 0.65% 73% 65 LLOG EXPLORATION OFFSHORE, INC. 23 185 0.184% 66%
31 EXCO RESOURCES, INC. 5,394 624 0.62% 97% 66 HIGHMOUNT E&P 5,461 183 0.182% 99%
32 HILCORP ENERGY COMPANY 1,557 613 0.61% 62% 67 BOPCO, L.P. 945 183 0.182% 63%
33 ENI PETROLEUM CO INC 75 525 0.52% 59% 68 THUMS LONG BEACH CO. 810 180 0.179% 6%
34 RANGE RESOURCES CORPORATION 5,147 468 0.46% 91% 69 CITATION OIL AND GAS CORPORATION 2,152 179 0.177% 23%
35 PLAINS EXPLORATION & PRODUCTION COMPANY 3,288 463 0.46% 38% 70 UNIT CORPORATION 1,165 178 0.177% 87%

January 2011 20

Production by Operator (cont'd)
71 EQT CORPORATION 4,626 177 0.175% 100% 106 STEPHENS GROUP INC 833 90 0.089% 100%
72 SWIFT ENERGY COMPANY 1,041 162 0.161% 48% 107 LEGACY RESOURCES CO., L.P. 2,270 89 0.088% 33%
73 ATP OIL & GAS CORPORATION 31 153 0.152% 49% 108 EAGLE ROCK ENERGY PARTNERS 273 88 0.087% 79%
74 PDC ENERGY 3,116 152 0.151% 79% 109 SLAWSON EXPLORATION COMPANY, INC. 164 86 0.086% 13%
75 HELIX 119 151 0.150% 61% 110 MARITECH RESOURCES, INC. 128 85 0.084% 57%
76 ENERGY XXI, LLC 134 148 0.147% 29% 111 LAREDO PETROLEUM, INC. 350 84 0.083% 92%
77 VENOCO, INC. 612 142 0.141% 65% 112 QUEST ENERGY LLC 3,252 84 0.083% 97%
78 ATLAS RESOURCES LLC 4,336 142 0.141% 92% 113 PETRO-HUNT CORPORATION 319 81 0.081% 28%
79 CARRIZO OIL & GAS, INC. 279 137 0.136% 97% 114 FASKEN OIL AND RANCH, LTD. 732 80 0.079% 37%
80 KAISER-FRANCIS OIL COMPANY 1,213 132 0.131% 89% 115 ENERPLUS RESOURCES USA CORPORATION 197 79 0.079% 17%
81 PETROQUEST ENERGY, L.L.C. 378 132 0.131% 85% 116 DAVIS PETROLEUM, INC. 126 79 0.079% 82%
82 SHERIDAN PRODUCTION COMPANY, LLC 1,268 131 0.130% 64% 117 NEXEN PETROLEUM USA INC 100 79 0.078% 48%
83 BALLARD EXPLORATION COMPANY,INC. 62 131 0.130% 79% 118 LIME ROCK RESOURCES A, L.P. 1,215 71 0.071% 76%
84 TALISMAN ENERGY USA INC. 136 130 0.130% 94% 119 J M HUBER CORPORATION 1,585 70 0.070% 100%
85 ROSETTA RESOURCES INC. 954 128 0.127% 94% 120 T-C OIL COMPANY 230 69 0.069% 68%
86 CHAPARRAL ENERGY LLC 1,511 121 0.120% 60% 121 BASA RESOURCES, INC. 2,377 68 0.067% 17%
87 RED WILLOW PRODUCTION, LLC 356 121 0.120% 100% 122 LEGEND NATURAL GAS III, LP 354 66 0.066% 88%
88 STATOIL USA E&P INC. 1 117 0.117% 100% 123 RESOLUTE NATURAL RESOURCES 388 66 0.065% 15%
89 RAAM GLOBAL ENERGY COMPANY 37 117 0.116% 71% 124 NEW DOMINION LLC 258 64 0.064% 90%
90 TEXAS PETROLEUM INVESTMENT CO. 1,316 111 0.110% 28% 125 ALTA MESA SERVICES, LP 91 63 0.062% 71%
91 DYNAMIC OFFSHORE RESOURCES, LLC 58 108 0.107% 45% 126 FORTUNA ENERGY, INC. 92 62 0.062% 100%
92 ENERGY PARTNERS, LTD. 188 107 0.106% 65% 127 DCOR, LLC 225 61 0.061% 21%
93 VALENCE OPERATING COMPANY 474 104 0.104% 96% 128 BRIGHAM OIL & GAS, L.P. 106 60 0.060% 32%
94 HELIS WM G ESTATE 94 104 0.104% 57% 129 WAGNER OIL COMPANY 226 58 0.058% 82%
95 DOMINION RESOURCES INC 5,490 103 0.103% 98% 130 TELLUS OPERATING GROUP, LLC 395 58 0.057% 56%
96 BREITBURN ENERGY COMPANY LLC 1,527 102 0.102% 41% 131 KILLAM OIL COMPANY LIMITED 386 57 0.057% 91%
97 ANKOR ENERGY LLC 75 101 0.101% 31% 132 BLACK ELK ENERGY OFFSHORE OPERATIONS LLC 59 57 0.056% 76%
98 PENN VIRGINIA OIL & GAS CORPORATION 1,208 101 0.100% 91% 133 SOUTHERN BAY OPERATING, LLC 457 55 0.055% 80%
99 QUANTUM RESOURCES MANAGEMENT,LLC 1,466 97 0.096% 70% 134 WILDHORSE RESOURCES LLC 274 55 0.054% 91%
100 LEWIS PETRO PROPERTIES, INC. 1,099 97 0.096% 97% 135 THREE RIVERS OPERATING COMPANY LLC 615 53 0.052% 70%
101 MILAGRO EXPLORATION,LLC 535 95 0.094% 82% 136 SUMMIT PETROLEUM LLC 527 51 0.051% 35%
102 NATIONAL FUEL GAS COMPANY 2,049 95 0.094% 48% 137 DELTA PETROLEUM CORPORATION 1,138 51 0.051% 96%
103 NFR ENERGY, LLC 558 93 0.093% 98% 138 NADEL & GUSSMAN 613 50 0.050% 68%
104 GOODRICH PETROLEUM COMPANY 269 91 0.091% 97% 139 CRIMSON EXPLORATION OPERATING INC 215 50 0.049% 88%
105 ANTERO RESOURCES CORPORATION 527 90 0.090% 97% 140 PISCES ENERGY LLC 42 49 0.049% 60%

January 2011 21

Production by Operator (cont'd)
141 MARUBENI CORPORATION 5 49 0.049% 47% 176 THOMPSON, J. CLEO 804 39 0.039% 43%
142 INDIGO MINERALS LLC 244 49 0.049% 94% 177 DUNCAN OIL & GAS INC. 187 38 0.038% 74%
143 RICOCHET ENERGY, INC. 82 47 0.047% 93% 178 PRIMEENERGY CORPORATION 1,317 38 0.038% 52%
144 ALTEX ENERGY CORPORATION 130 47 0.047% 96% 179 CML EXPLORATION, LLC 184 38 0.038% 37%
145 WALTER BLACK WARRIOR BASIN LLC 1,312 47 0.047% 100% 180 BTA OIL PRODUCERS, LLC 427 37 0.037% 50%
146 GMX RESOURCES, INC. 173 47 0.046% 97% 181 SUNDOWN ENERGY, INC. 376 36 0.036% 49%
147 WOLVERINE GAS & OIL COMPANY OF UTAH, LLC 20 46 0.046% 0% 182 TARPON OIL & GAS CO. 71 36 0.036% 76%
148 WILLIAMS, CLAYTON ENERGY, INC. 352 46 0.045% 31% 183 GASTAR EXPLORATION TEXAS, LP 40 36 0.035% 99%
149 MANTI EXPLORATION OPERATING LLC 34 45 0.045% 81% 184 VESS OIL CORPORATION 1,260 36 0.035% 7%
150 MUREX PETROLEUM CORPORATION 128 45 0.045% 8% 185 ELM RIDGE RESOURCES INCORPORATED 812 36 0.035% 91%
151 ZENERGY, INC. 183 45 0.045% 50% 186 BEUSA ENERGY, INC. 68 35 0.035% 99%
152 SND OPERATING, LLC 696 45 0.045% 85% 187 GULFPORT ENERGY CORPORATION 103 35 0.035% 10%
153 HOLMES EXPLORATION, LLC 113 45 0.045% 51% 188 MIDROC OPERATING COMPANY 92 35 0.034% 23%
154 SANGUINE GAS EXPLORATION, LLC 94 45 0.044% 60% 189 SANCHEZ OIL & GAS CORPORATION 116 34 0.034% 80%
155 HEADINGTON OIL COMPANY LIMITED PARTNER 102 44 0.044% 94% 190 CROW CREEK OPERATING COMPANY II, LLC 259 34 0.034% 88%
156 JONES ENERGY, LTD. 284 44 0.044% 70% 191 PHOENIX EXPLORATION COMPANY LP 22 34 0.034% 84%
157 ENERGY CORPORATION OF AMERICA 3,288 44 0.044% 99% 192 JETTA OPERATING COMPANY, INC. 252 34 0.034% 29%
158 HALL HOUSTON EXPLORATION II L P 12 43 0.043% 89% 193 CLASSIC OPERATING CO. LLC 159 34 0.033% 94%
159 PREMIER NATURAL RESOURCES, LLC 231 43 0.043% 93% 194 FAULCONER,VERNON E., 451 33 0.033% 96%
160 BURNETT OIL COMPANY, INC. 254 43 0.042% 56% 195 BLACK WARRIOR METHANE CORP. 404 33 0.032% 100%
161 TANA EXPLORATION COMPANY LLC 11 42 0.042% 80% 196 WOODSIDE PETROLEUM 73 33 0.032% 89%
162 BLACK HILLS CORPORATION 707 41 0.041% 85% 197 GREAT WESTERN OIL & GAS COMPANY LLC 392 33 0.032% 27%
163 TEXLAND PETROLEUM, L.P. 559 41 0.041% 8% 198 FINLEY RESOURCES, INC. 435 33 0.032% 64%
164 MACK ENERGY/OIL COMPANIES 472 41 0.041% 36% 199 WARD PETROLEUM CORPORATION 182 33 0.032% 91%
165 R. LACY SERVICES, LTD. 244 41 0.040% 97% 200 WAGNER & BROWN, LTD. 96 32 0.032% 88%
166 SOUTHWEST ROYALTIES, INC. 804 41 0.040% 32% 201 ROSEWOOD RESOURCES, INC. 954 32 0.032% 98%
167 PATARA OIL & GAS, LLC 166 40 0.040% 98% 202 HUGHES, DAN A. COMPANY, L.P. 123 32 0.032% 86%
168 TIDELANDS OIL PROD. CO. 392 40 0.040% 4% 203 FIML NATURAL RESOURCES, LLC 629 32 0.032% 75%
169 STEPHENS & JOHNSON OPERATING COMPANY 807 40 0.040% 39% 204 VENTURE OIL AND GAS INC 57 32 0.032% 17%
170 APPROACH OPERATING, LLC 501 40 0.040% 84% 205 SQUARE MILE ENERGY, LLC 25 32 0.031% 76%
171 SAMUEL GARY JR. & ASSOCIATES, INC. 63 40 0.040% 65% 206 DART OIL AND GAS CORP 1,112 31 0.031% 89%
172 PABLO ENERGY II, LLC 78 40 0.040% 95% 207 ERGON INC. 36 31 0.031% 70%
173 BEREXCO, INC. 1,342 39 0.039% 20% 208 MARLIN OIL CORPORATION 177 31 0.031% 68%
174 MACPHERSON OIL CO. 235 39 0.039% 0% 209 CRAWLEY PETROLEUM CORPORATION 419 30 0.030% 87%
175 DUNE ENERGY INC. 88 39 0.039% 63% 210 BROAD OAK ENERGY, INC. 143 30 0.030% 38%
Others 475,771 29,424 29.2% 64%
Total 751,735 100,663 100.0% 68%

January 2011 22

Permits by Basin
Permits by Basin (1 – 24) Permits by Basin (25 – 49)

LTM Permits LTM Permits
Rank Basin Drilling Permit'd Drilled Total Rank Basin Drilling Permit'd Drilled Total
1 Appalachian 102 7,784 2,149 10,035 25 Sedgwick Basin 1 78 225 304
2 Permian Basin 124 3,164 6,508 9,796 26 Sacramento 0 144 119 263
3 Texas & Louisiana Gulf Coast Basin 62 2,821 2,856 5,739 27 Alaska 1 80 94 175
4 San Joaquin 16 2,371 2,063 4,450 28 Black Warrior Basin 0 113 52 165
5 Ft Worth Basin 40 1,170 2,072 3,282 29 Ouachita Folded Belt 1 103 55 159
6 Denver Julesburg 28 1,928 1,319 3,275 30 Ventura 0 105 42 147
7 Arkla Basin 49 1,893 1,144 3,086 31 Sweet Grass Arch 3 109 35 147
8 Anadarko Basin 58 920 2,102 3,080 32 Wind River 1 87 33 121
9 Piceance 28 1,862 672 2,562 33 Ca Coastal 3 64 54 121
10 Williston 124 1,029 1,242 2,395 34 Las Animas Arch 0 45 68 113
11 Chautauqua Platform 5 1,066 487 1,558 35 Santa Barbara 0 99 13 112
12 Arkoma Basin 31 240 1,153 1,424 36 Palo Duro Basin 0 29 79 108
13 East Texas Basin 32 564 740 1,336 37 Raton 0 89 15 104
14 Powder River 7 919 259 1,185 38 Nemaha Anticline 0 31 63 94
15 Uinta 11 645 484 1,140 39 Offshore Gom 4 28 48 80
16 Green River 10 668 411 1,089 40 Big Horn 1 34 33 68
17 Forest City Basin 0 964 23 987 41 Central Montana Uplift 0 41 22 63
18 Cherokee Basin 0 881 66 947 42 Paradox 1 48 10 59
19 Central Kansas Uplift 0 264 651 915 43 Chadron Arch 0 0 53 53
20 Mississippi & Alabama Gulf Coast Basin 3 366 216 585 44 Central Western Overthrust 1 42 9 52
21 San Juan 5 370 157 532 45 Salina Basin 0 9 16 25
22 Michigan 1 405 101 507 46 Great Basin 0 9 0 9
23 Los Angeles 3 340 76 419 47 North Park 0 7 1 8
24 South Oklahoma Folded Belt 0 230 166 396 48 Park Basin 0 3 1 4
49 Wasatch Uplift 0 0 3 3
Total 756 34,261 28,260 63,277

January 2011 23

Permits by Operator
Permits by Operator (1 – 35) Permits by Operator (36 – 70)
Rank Company Drilling Permit'd Drilled Total Rank Company Drilling Permit'd Drilled Total
1 CHESAPEAKE OPERATING INC 70 1,420 1,237 2,727 36 CIMAREX ENERGY CO 6 150 138 294
2 ANADARKO PETROLEUM CORPORATION 26 975 946 1,947 37 EL PASO EXPLORATION & PRODUCTION COLP 1 144 146 291
3 CHEVRON USA INC 9 1,010 606 1,625 38 ULTRA RESOURCES INC 1 213 71 285
4 EXXONMOBIL DEVELOPMENT COMPANY 38 746 822 1,606 39 PLAINS EXPLORATION & PRODUCTION COMPANY 1 136 141 278
5 AERA ENERGY LLC 1 500 999 1,500 40 TALISMAN ENERGY USA INC 9 205 63 277
6 EOG RESOURCES INC 17 581 862 1,460 41 CONTINENTAL RESOURCES INC 22 71 181 274
7 ENCANA OIL & GAS (USA) INC 30 575 544 1,149 42 EXCO OPERATING COMPANY LP 4 127 141 272
8 DEVON ENERGY PRODUCTION COMPANY LP 30 367 654 1,051 43 ENDEAVOR ENERGY RESOURCES LP 2 97 165 264
9 WILLIAMS PRODUCTION COMPANY 12 665 331 1,008 44 PETROLEUM DEVELOPMENT CORPORATION 2 130 131 263
10 NOBLE ENERGY INC 11 564 417 992 45 HIGHMOUNT EXPL & PROD LLC 0 67 194 261
11 BERRY PETROLEUM COMPANY 4 571 276 851 46 SAMSON RESOURCES COMPANY 3 108 135 246
12 CONOCOPHILLIPS COMPANY 12 430 363 805 47 KRIEBEL MINERALS INC 0 204 33 237
13 EQUITABLE PRODUCTION COMPANY 12 544 220 776 48 ANTERO RESOURCES CORPORATION 4 175 56 235
14 OXY USA INC 8 352 392 752 49 HESS CORPORATION 9 129 92 230
15 PIONEER NATURAL RESOURCES USA INC 23 213 497 733 50 BROAD OAK ENERGY INC 0 3 219 222
16 SANDRIDGE ENERGY INC 3 126 597 726 51 SHELL EXPLORATION & PRODUCTION CO INC 5 110 96 211
17 SOUTHWESTERN ENERGY 9 101 600 710 52 LINN OPERATING INC 7 100 95 202
18 COG OPERATING LLC 8 201 456 665 53 CLAYTON WILLIAMS ENERGY INC 3 94 101 198
19 US ENERGY EXPLORATION CORPORATION 0 480 91 571 54 HENRY RESOURCES LLC 1 102 92 195
20 NEWFIELD EXPLORATION COMPANY 9 270 280 559 55 MEWBOURNE OIL COMPANY 2 59 129 190
21 APACHE CORPORATION 12 189 347 548 56 VENOCO INC 2 90 95 187
22 EAST RESOURCES INC 2 431 80 513 57 ROSETTA RESOURCES OPERATING LP 1 81 104 186
23 BP AMERICA PRODUCTION COMPANY 16 273 218 507 58 ATLAS RESOURCES INC 5 107 74 186
24 OCCIDENTAL OF ELK HILLS INC 7 289 205 501 59 OK ARENA OPERATING COMPANY 1 18 165 184
25 ENERGEN RESOURCES CORPORATION 6 123 308 437 60 CHAPARRAL ENERGY LLC 0 95 89 184
26 LANCE OIL & GAS COMPANY INC 0 342 87 429 61 YATES PETROLEUM CORPORATION 3 145 35 183
27 CNX GAS COMPANY LLC 4 405 17 426 62 CATALYST ENERGY INC 0 180 0 180
28 WHITING OIL & GAS CORPORATION 17 197 183 397 63 SENECA RESOURCES CORPORATION 3 136 40 179
29 DENBURY ONSHORE LLC 6 275 105 386 64 DELTA PETROLEUM CORPORATION 1 174 0 175
30 BILL BARRETT CORPORATION 4 276 100 380 65 AMERICAN WARRIOR INC 0 85 90 175
31 RANGE RESOURCES CORPORATION 10 165 172 347 66 GULFPORT ENERGY CORPORATION 0 99 56 155
32 HILCORP ENERGY COMPANY 0 236 95 331 67 ENERVEST OPERATING LLC 1 99 54 154
33 FIDELITY EXPLORATION & PRODUCTION CO 3 234 92 329 68 CABOT OIL & GAS CORPORATION 5 76 67 148
34 QEP ENERGY COMPANY 6 205 95 306 69 MARINER ENERGY INC 0 50 97 147
35 PETROHAWK OPERATING COMPANY 16 125 157 298 70 CHIEF OIL & GAS LLC 3 82 62 147

January 2011 24

Permits by Operator (cont'd)
71 MACPHERSON OIL COMPANY 1 104 34 139 106 OPAL RESOURCES OPERATING COMPANY LLC 1 47 44 92
72 SWIFT ENERGY OPERATING LLC 2 81 55 138 107 FASKEN OIL&RANCH LTD 4 22 64 90
73 MARATHON OIL COMPANY 3 61 72 136 108 CROWNQUEST OPERATING LLC 2 19 65 86
74 ENERGY PARTNERS LTD 0 125 9 134 109 PENNSYLVANIA GENERAL ENERGY CO LLC 0 66 19 85
75 SLAWSON EXPLORATION COMPANY INC 5 72 56 133 110 SHERIDAN PRODUCTION COMPANY LLC 2 55 27 84
76 EXCO RESOURCES INC 0 64 67 131 111 J & J OPERATING LLC 0 83 0 83
77 FOREST OIL CORPORATION 5 77 48 130 112 MERIT ENERGY COMPANY 0 63 19 82
78 BREITBURN ENERGY COMPANY LLC 0 123 5 128 113 STEVE BURCHETT OIL COMPANY 0 81 0 81
79 SNYDER BROTHERS INC 0 126 0 126 114 BRIGHAM OIL & GAS LP 4 16 59 79
80 SM ENERGY COMPANY 1 21 103 125 115 RELIANCE ENERGY INC 1 14 62 77
81 RUNNING FOXES PETROLEUM INC 1 120 2 123 116 NATIONS PETROLEUM (CALIFORNIA) LLC 0 76 0 76
82 E & B NATURAL RESOURCES MANAGEMENT CORP 0 122 1 123 117 JUNO OPERATING COMPANY LLC 0 46 30 76
83 DOMINION EXPLORATION & PRODUCTION INC 0 86 37 123 118 LAYMON OIL II LLC 0 75 0 75
84 UNIT PETROLEUM COMPANY 3 26 92 121 119 LEGEND NATURAL GAS III LP 0 23 49 72
85 PERFORMANCE ENERGY RESOURCES LLC 0 121 0 121 120 TITUSVILLE OIL & GAS ASSOCIATES INC 0 71 0 71
86 LEWIS PETRO PROPERTIES INC 2 12 107 121 121 BIRK PETROLEUM 0 68 0 68
87 NEW DOMINION LLC 1 20 100 121 122 ABARTA OIL & GAS COMPANY INC 0 31 37 68
88 CITATION OIL & GAS CORP 0 31 90 121 123 OASIS PETROLEUM NORTH AMERICA LLC 6 19 42 67
89 KINDER MORGAN PRODUCTION COMPANY LLC 0 55 64 119 124 PRIME OPERATING COMPANY 1 14 51 66
90 BOBCAT OIL FIELD SERVICE INC 0 116 0 116 125 MURFIN DRILLING COMPANY INC 0 0 66 66
91 COLT ENERGY INC 0 114 0 114 126 PETRO-HUNT LLC 5 37 23 65
92 R C OIL COMPANY INC 0 112 0 112 127 QUALITY NATURAL GAS LLC 0 37 27 64
93 R J ENTERPRISES 0 111 0 111 128 OMNI OIL & GAS INC 0 11 53 64
94 LAREDO PETROLEUM INC 1 19 87 107 129 K P KAUFFMAN COMPANY INC 0 64 0 64
95 CARRIZO OIL & GAS INC 0 43 63 106 130 SAMUEL GARY JR & ASSOCIATES INC 0 15 48 63
96 THUMS LONG BEACH COMPANY 1 66 36 103 131 MIDSTATES PETROLEUM COMPANY LLC 2 36 25 63
97 CONSOL GAS COMPANY 1 94 8 103 132 JONES ENERGY LTD 2 21 40 63
98 FIML NATURAL RESOURCES LLC 0 9 93 102 133 BOPCO LP 0 48 15 63
99 ALTAVISTA ENERGY INC 0 101 0 101 134 ZIEGLER-PERU INC 0 50 11 61
100 WEXPRO COMPANY 1 64 34 99 135 TAILWATER INC 0 61 0 61
101 TEXAS KEYSTONE INC 2 62 35 99 136 PENN VIRGINIA OIL & GAS CORPORATION 1 24 35 60
102 QUICKSILVER RESOURCES INC 1 45 53 99 137 HELIS OIL & GAS COMPANY LLC 2 40 17 59
103 PATRIOT RESOURCES INC 1 49 49 99 138 CHOLLA PETROLEUM INC 0 13 46 59
104 COMSTOCK OIL & GAS LP 0 49 47 96 139 ANSCHUTZ EXPLORATION CORPORATION 5 24 30 59
105 APPROACH OPERATING LLC 1 13 82 96 140 CONSTELLATION ENERGY 0 40 18 58

January 2011 25

Permits by Operator (cont'd)
141 J CLEO THOMPSON 0 13 45 58 176 RKI EXPLORATION & PRODUCTION LLC 0 31 16 47
142 RICK-ROD OIL COMPANY INC 0 54 3 57 177 BEREXCO LLC 0 3 44 47
143 RDT PROPERTIES INC 0 30 27 57 178 MINARD RUN OIL COMPANY 0 46 0 46
144 AUGUSTUS ENERGY PARTNERS LLC 0 23 34 57 179 CONSOLIDATION COAL COMPANY 0 46 0 46
145 STONE ENERGY CORPORATION 2 38 16 56 180 BONANZA CREEK ENERGY OPERATING CO LLC 0 39 7 46
146 SUMMIT PETROLEUM LLC 0 4 52 56 181 PETRO-CANADA RESOURCES (USA) INC 0 31 14 45
147 ROSEWOOD RESOURCES INC 0 24 32 56 182 WEST BAY EXPLORATION COMPANY 0 19 25 44
148 LEGADO PERMIAN LLC 0 45 11 56 183 TEXAS ENERGY OPERATIONS LC 0 28 16 44
149 BLACK WARRIOR METHANE CORP 0 56 0 56 184 T-C OIL COMPANY 0 25 19 44
150 PARSLEY ENERGY OPERATIONS LLC 2 24 29 55 185 REX ENERGY OPERATING CORPORATION 3 14 27 44
151 MACK ENERGY CORPORATION 3 37 15 55 186 PENNECO OIL COMPANY INC 0 40 4 44
152 LCS PRODUCTION COMPANY 0 27 28 55 187 LIME ROCK RESOURCES A LP 0 13 31 44
153 J-W OPERATING COMPANY 0 35 20 55 188 LAYNE ENERGY OPERATING LLC 0 38 6 44
154 DOWNING-NELSON OIL COMPANY INC 0 55 0 55 189 WOOLSEY OPERATING COMPANY LLC 0 3 40 43
155 COBRA OIL & GAS CORPORATION 0 17 37 54 190 PINNACLE GAS RESOURCES INC 0 43 0 43
156 HIGHLAND OIL&GAS LLC 0 16 37 53 191 PHARYN RESOURCES LLC 0 42 0 42
157 WG OPERATING INC 0 4 48 52 192 BEUSA ENERGY INC 1 23 18 42
158 MUSKEGON DEVELOPMENT COMPANY 0 52 0 52 193 SIRIUS ENERGY CORP 0 41 0 41
159 INTERSTATE GAS MARKETING INC 0 47 5 52 194 CORDILLERA ENERGY PARTNERS III LLC 1 5 35 41
160 HOWARD DRILLING INC 0 52 0 52 195 HUNT OIL COMPANY 4 13 23 40
161 VAL ENERGY INC 0 4 47 51 196 RICKY BELL 0 39 0 39
162 STEPHENS PRODUCTION COMPANY 0 9 41 50 197 OXFORD OIL COMPANY 0 39 0 39
163 LARAMIE ENERGY II LLC 1 38 11 50 198 MARITECH RESOURCES INC 0 29 10 39
164 HOWELL PETROLEUM CORPORATION 0 39 11 50 199 H R STASNEY & SONS LTD 0 30 9 39
165 EDWARD MIKE DAVIS LLC 0 29 21 50 200 GOODRICH PETROLEUM COMPANY 0 16 23 39
166 EDWARD E BIRK 0 50 0 50 201 SAVOY ENERGY LP 1 32 5 38
167 ALLEGHENY ENTERPRISES INC 0 50 0 50 202 QUEST CHEROKEE LLC 0 37 1 38
168 TELLUS OPERATING GROUP LLC 1 37 11 49 203 NFR ENERGY LLC 0 10 28 38
169 SAGEBRUSH RESOURCES LLC 0 27 22 49 204 MILAGRO EXPLORATION LLC 0 27 11 38
170 L D DRILLING INC 0 5 44 49 205 BLACK RAVEN ENERGY INC 0 21 17 38
171 THREE SISTERS PETROLEUM INC 0 48 0 48 206 TEXLAND PETROLEUM LP 0 15 22 37
172 PLANTATION OPERATING LLC 0 28 20 48 207 MOUNTAIN VIEW ENERGY INC 0 37 0 37
173 PARALLEL PETROLEUM LLC 0 3 45 48 208 AMERICAN OIL & GAS INC 1 11 25 37
174 ELEMENT PETROLEUM OPERATING LLC 1 18 29 48 209 TOWN OIL COMPANY INC 0 36 0 36
175 WINDSOR PERMIAN LLC 0 18 29 47 210 ENERPLUS RESOURCES USA CORPORATION 0 25 11 36
Others 560 24,542 21,093 46,195
Total 759 34,410 28,348 63,517

January 2011 26

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