Summary: U.S. Crude Oil, Natural Gas,

and Natural Gas Liquids Proved Reserves

2009

November 2010

U.S. Energy Information Administration

Office of Oil, Gas, and Coal Supply Statistics

U.S. Department of Energy

Washington, DC 20585

This re port was pre pared by the U.S. En ergy In for ma tion Ad min is tra tion (EIA), the sta tis ti cal and an a lyt i cal agency within the 

U.S. De part ment of En ergy. By law, EIA’s data, anal y ses, and fore casts are in de pend ent of ap proval by any other of fi cer or

em ployee of the United States Gov ern ment. The views in this re port there fore should not be con strued as rep re sent ing

those of the De part ment of Energy or other Federal agencies.

1

U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Proved Reserves,

2009

Summary

Domestic proved reserves1of oil and natural gas increased significantly in 2009. U.S. natural gas proved

reserves2—estimated as “wet” gas which includes natural gas plant liquids—increased by 11 percent in 2009 to

284 trillion cubic feet (Tcf). This is their highest level since 1971, despite an approximate one-third decline in the

prices used to assess economic viability for 2009 reserves as compared to the prices used in 2008. U.S. crude

oil plus lease condensate proved reserves rose 9 percent to 22.3 billion barrels in 2009, regaining 1.8 billion

barrels of the 2.3 billion barrel decline in 2008. These increases demonstrate the possibility of an expanding

role for domestic natural gas and crude oil in meeting both current and projected U.S. energy demands.

Shale gas development in Louisiana, Arkansas, Texas, Oklahoma, and Pennsylvania drove the increase in

proved reserves of natural gas. Louisiana led the nation in wet natural gas proved reserves additions with a 77

percent net increase of 9.2 Tcf owing primarily to development of the Haynesville shale. Both Arkansas

(Fayetteville shale) and Pennsylvania (Marcellus shale) nearly doubled their reserves with net increases of 5.2

Tcf and 3.4 Tcf respectively. Shale development in Texas and Oklahoma wasn’t far behind, giving these two

States proved reserves increases of 3.2 Tcf and 2.1 Tcf. These increases occurred despite a decline in natural

gas prices relative to those used in assessing reserves at the end of 2008. This underscores the role of more

efficient and effective shale gas exploration and productive technologies such as horizontal drilling and

hydraulic fracturing.

Proved reserves of oil increased in each of the five largest crude oil and lease condensate areas (Texas, the

Gulf of Mexico Federal Offshore, California, Alaska, and North Dakota) in 2009. Texas had the largest proved

reserves increase, 529 million barrels (11 percent), nearly all in the Permian Basin. North Dakota reported the

second largest increase, 481 million barrels (83 percent), because of Bakken Formation development. A

significant driver for these increases was the higher average level of 2009 crude oil prices relative to those of

December 2008.

1

EIA defines proved reserves as those volumes of oil and natural gas that geologic and engineering data demonstrate with

reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating

conditions. Proved reserves are a small subset of recoverable resources with a probability of recovery of at least 90%.

2 Natural gas, wet after lease separation, is the volume of natural gas remaining after removal of lease condensate in lease

and/or field separation facilities, if any, and after exclusion of nonhydrocarbon gases where they occur in sufficient quantity

to render the gas unmarketable. Natural gas plant liquids may be recovered from volumes of natural gas, wet after lease

separation, at natural gas processing plants. Lease condensate is included with crude oil.

Table 1. Changes to Proved Reserves, 2009

Crude Oil plus Condensate

(billion barrels)

Wet Natural Gas

(trillion cubic feet)

Reserves at December 31, 2008 20.6 255.0

Total discoveries 1.5 47.6

Net revisions and other 2.1 3.8

Production -1.9 -22.5

Net change in reserves 1.8 28.8

Reserves at December 31, 2009 22.3 283.9

Percentage change in reserves 8.6% 11.3%

Notes: Oil includes lease condensate; wet natural gas includes plant liquids. Percent change

calculated from unrounded numbers.

Source: U.S. Energy Information Administration
2

Background

The U.S. Energy Information Administration (EIA) provides annual estimates of the United States proved

reserves of crude oil, natural gas, and natural gas liquids (NGL) based on filed responses to Form EIA-23,

Annual Survey of Domestic Oil and Gas Reserves—an annual survey of about 1,200 domestic operators.

EIA defines proved reserves as those volumes of oil and natural gas that geologic and engineering data

demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing

economic and operating conditions. Reserves estimates change from year to year as new discoveries are

made, existing reserves are produced, and as prices and technologies change. Discoveries include new fields,

identification of new reservoirs in old fields, and extensions. Extensions are reserve additions that result from

additional drilling and exploration in previously discovered reservoirs. Extensions typically account for a large

percentage of “discoveries” within a given year. While actual discoveries of new fields and reservoirs are

important indicators of new resources, they usually account for a small percentage of reserve additions in a

given year. Revisions occur primarily when operators change their estimates of what they will be able to

produce from the properties they operate using existing technology and prices.

Both EIA and the Securities and Exchange Commission (SEC) require oil and gas companies to provide

information on their oil and gas reserves. However, there are differences between these two reporting systems.

First, EIA takes a more comprehensive approach and collects information from both publicly traded and

privately held companies, while the SEC reporting requirements only apply to companies with more than $10

million in assets and whose securities are held by more than 500 owners3. Second, the SEC companies report

their owned reserves while companies that report to the EIA (both public and private) report operated reserves.

(Additional information and comparisons of the SEC and EIA reserves can be found in a supplemental report

Top 100 Operators: Proved Reserves and Production, Operated vs. Owned, 2009.)

The proved reserves estimates reported here are based on data provided by operators on Form EIA-23 plus an

adjustment to account for operators not required to supply information on proved reserves, who account for

roughly five percent of estimated total proved reserves. The breakdown of proved reserves estimates provided

for shale gas and coalbed methane, however, represent only information reported by operators on Form EIA-23

and do not include any adjustment to account for reserve holders not included in the survey. Therefore, the

actual U.S. proved reserves and production of shale gas and coalbed methane may be slightly different than

indicated in this report.

Information on production volumes included in this report may differ from other annual production data issued

by EIA, which makes extensive use of State-reported annual data and uses Form EIA-23 to fill in when such

data is not available. Since 1990, differences between the production volumes in this report and those that

reflect annual State-reported data have generally been well under one percent.

While several factors influence proved reserves estimates, crude oil and natural gas prices are particularly

important. Higher prices typically increase estimates (positive revisions) as operators consider a broader

portion of the resource base economically producible, or proved. Lower prices generally reduce estimates

(negative revisions) as the economically producible base contracts.

For the 2009 reporting year, companies reporting to the SEC followed updated rules for determining the prices

underpinning their proved reserves estimates. The new rules, which were designed to make estimates less

sensitive to price fluctuations during the year, require companies to use an average of the 12 first-day-of-themonth prices. In prior years, companies’ estimates were based on the market price on the last trading day of

the year. Oil and gas prices on the last day of 2008 were $44.60 per barrel and $5.63 per million Btu (MMbtu).

The 12 first-day-of-the-month average oil and gas prices for 2009 were $61.08 per barrel and $3.83 per MMbtu.

Oil prices increased 37 percent and gas prices declined 32 percent from 2008 to 2009 according to the SEC

price rules.

Estimates of oil and wet natural gas proved reserves each rose significantly in 2009; however, the underlying

drivers for each were quite different. For oil, higher prices had a major effect and proved reserves increased

primarily because of revisions. The situation was quite different for wet natural gas. Lower prices made net

revisions negative for 2009, but this loss was more than replaced by total discoveries, primarily extensions of

shale gas fields.

3

For 2009, 40 of the Top 100 Operators ranked by proved reserves of oil, and 28 of the Top 100 Operators ranked by wet

natural gas proved reserves are privately owned companies and do not report to the SEC.
3

Wet Natural Gas Proved Reserves (Includes Natural Gas Plant Liquids)

Total U.S. proved reserves of wet natural gas rose by 28.8 Tcf from 2008 to 2009, to 284 Tcf. That increase

reflects the strongest net proved reserve additions of wet natural gas in the United States in recent years. Wet

natural gas proved reserves are now at the highest level since 1971. U.S. proved reserves of natural gas have

increased in every year since 1999, a trend accelerated by shale gas drilling. (Figure 1)

The Importance of Unconventional Sources. Application of new technologies can convert categories of

previously uneconomic natural gas resources into proved reserves. EIA began reporting reserves data

separately for coalbed methane in 1990 and for shale gas in 2008. EIA does not currently report reserves

estimates for tight gas, the third category of gas sometimes categorized as unconventional.

Table 2. Changes to Proved Reserves of Wet Natural Gas by Source, 2009

(trillion cubic feet)

Proved Revisions & Proved

Reserves Discoveries Other Changes Production Reserves

Source of Gas Year-End 2008 2009 2009 2009 Year-End 2009

Coalbed Methane 20.8 0.8 -1.1 -1.9 18.6

Shale 34.4 24.8 4.5 -3.1 60.6

Other (Conventional & Tight)

Lower 48 Onshore 178.2 21.0 -1.1 -15.4 182.6

Lower 48 Offshore 13.9 0.9 0.5 -2.4 12.9

Alaska 7.8 0.0 1.1 -0.4 9.2

TOTAL 255.0 47.6 3.8 -22.5 283.9

Source: U.S. Energy Information Administration

0

50

100

150

200

250

300

1979 1982 1985 1988 1991 1994 1997 2000 2003 2006 2009

0

50

100

150

200

250

300

U.S. Total

Lower 48 Onshore

Federal Offshore

Alaska

Source: U.S. Energy Information Administration

Figure 1. U.S. Wet Natural Gas Proved Reserves, 1979-2009

trillion cubic feet
4

Shale Gas

Additions associated with shale gas activity were instrumental in boosting overall wet gas proved reserves. Shale

gas accounted for more than 90 percent of total net additions. Key shale States in 2009 include Arkansas (the

Fayetteville Shale), Louisiana (the Haynesville), Oklahoma (the Woodford), Pennsylvania (the Marcellus), and

Texas (the Barnett and Haynesville/Bossier). The 11 percent increase in U.S. proved natural gas reserves took

place during a low-price environment that resulted in negative revisions to existing reserves. This underscores

the major improvements in shale gas exploration and production technologies (horizontal drilling coupled with

hydraulic fracturing) and efficiencies. Natural gas from shale represented 21 percent of U.S. gas reserves in

2009, with the majority coming from 6 major shale areas (see table below and Figure 2). The largest shale gas

area in the U.S. remains the Barnett in Texas (Figure 3). The only shale of the six to decline in reserves in 2009

was the Antrim Shale of northern Michigan—a mature, shallow biogenic shale gas play discovered in 1986 that is

no longer being developed at the same pace as the other leading shales. For a state-by-state listing of shale gas

reserves and production from 2007 to 2009, click here. For a detailed listing of 2009 shale gas proved reserves,

reserves changes, and production, click here. For a series of maps showcasing the Nation’s shale gas resources

for both shale plays and geologic basins, click here.

Note: The above table is based on shale gas proved reserves and production volumes as reported to the EIA on Form EIA-23.

It does not include EIA-estimated volumes for non-surveyed operators. For this and other reasons (e.g., incorrect or incomplete

respondent submissions, respondent misidentification of shale versus non-shale reservoirs) the actual proved reserves and

production of natural gas from shale plays may differ. Official EIA shale gas production volumes are reported in Natural Gas

Navigator.

The drop in natural gas prices began to impact development plans as operators started in late 2009 to shift

investments toward the development of shale gas plays in areas with a higher yield of NGLs and crude oil (e.g.

portions of the Marcellus Shale in southwest Pennsylvania and the Eagle Ford Shale of Texas). The addition of

higher priced crude oil, condensate, and NGLs improves project economics.

Table 3. Principal Shale Gas Plays: Natural Gas Production and Proved Reserves, 2008-2009

(billion cubic feet)

2008 2009 Change 2009-2008

Shale Play Production Reserves Production Reserves Production Reserves

Barnett 1,501 22,492 1,745 26,493 318 4,001

Haynesville/Bossier 25 1,031 321 10,468 296 9,437

Fayetteville 279 3,833 527 9,070 248 5,237

Woodford 168 3,845 249 6,389 81 2,544

Marcellus 2 102 76 4,478 74 4,376

Antrim 122 2,894 132 2,499 14 -395

Sub-total 2,097 34,197 3,050 59,397 953 25,200

Other Shale Plays 19 231 60 1,247 41 1,016

All U.S. Shale Plays 2,116 34,428 3,110 60,644 994 26,216
5

Note: The volumes of shale gas represent only data reported by operators on Form EIA-23; estimates for all non-surveyed operators are included in “Rest of

United States”.

Figure 3. Shale Gas Proved Reserves by Year

0

5

10

15

20

25

30

Texas Louisiana Arkansas Oklahoma Pennsylvania Michigan Other Statesa

2007 2008 2009

trillion cubic feet

a Other States include Indiana, Kentucky, Missouri, North Dakota, Tennessee, and West Virginia.

Source: U.S. Energy Information Administration.

Note: The volumes of shale gas represent only data reported by operators on Form EIA-23, as opposed to complete EIA estimates. The actual total volumes,

including estimates for non-surveyed operators, may consequently be different.

Rest of United States

79%

Marcellus

2%

Woodford

2%

Fayetteville

3%

Antrim

1%

Haynesville/Bossier

4%

Other Shales

<1%

Barnett

9%

Source: U.S. Energy Information Administration

Figure 2. Shares of U.S. Natural Gas Proved Reserves from Shale Plays and Other Sources, 2009

284 Tcf Total
6

Natural Gas Proved Reserves Changes in 2009

220

230

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270

280

290

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W

et N

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255

Tcf

284

Tcf

1.4 2.7

43.5

(1.9) (0.2)

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uisitio

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5.9

(22.5)

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9

Total Discoveries 47.6

Total Reserves Additions 51.4

Figure 4. U.S. Wet Natural Gas Proved Reserves Changes, 2009

Source: U.S. Energy Information Administration

Net Revisions and Other 3.8

Total Discoveries. Total wet natural gas discoveries of 47.6 Tcf represented the seventh consecutive yearly

increase and were by far the highest level of discoveries in the 33 years EIA has published proved reserves

estimates. In 2009, 91 percent of total wet natural gas discoveries and 90 percent of shale gas discoveries

came from extensions of existing fields. New field discoveries totaled 1.4 Tcf and new reservoir discoveries in

previously discovered fields totaled 2.7 Tcf, each representing an increase over 2008, but together accounting

for less than 10 percent of total discoveries.

Tight gas from the Pinedale Anticline in Wyoming added 3.6 Tcf of extensions to the U.S. total wet natural gas

reserves.

Net Revisions and Other Changes. Proved reserves revisions occur primarily when operators change their

estimates of what they will be able to produce from the properties they operate using existing technology and

prices. These revisions reflect changing prices, changing cost structures (for example, because of innovation),

and other factors. Other small changes occur when operators buy and sell properties (revaluing the proved

reserves in the process), and as various adjustments are made to reconcile estimated volumes.

Net revisions of wet natural gas proved reserves for 2009 were a negative 1.9 Tcf. Negative revisions of 34.6

Tcf were the second largest in the past decade, reflecting a significant drop in the wellhead price. The average

wellhead price dropped from $7.96 per thousand cubic feet (Mcf) in 2008 to $3.71 per Mcf in 2009. The 2009

negative revisions were largely offset by positive revisions of 32.7 Tcf that in part reflect an improving ability to

produce unconventional gas economically.

Production. Wet natural gas produced during a year is subtracted from proved reserves. As reported on the

survey, production of wet natural gas in 2009 totaled 22.5 Tcf, up 5.2 percent from 2008, marking the fourth

consecutive annual increase in U.S. wet natural gas production.

Maps. Figures 5 and 6 display wet natural gas proved reserves by area for 2009 and the annual changes in

reserves by area from 2008 to 2009.
7

Figure 5: Wet Natural Gas Proved Reserves by Area, 2009

States with a color but no value displayed above are intentionally unlabelled for confidentiality reasons.

Source: U.S. Energy Information Administration

Figure 6: Changes in Wet Natural Gas Proved Reserves by Area, 2008 to 2009

States with a color but no value displayed above are intentionally unlabelled for confidentiality reasons.

Source: U.S. Energy Information Administration
8

Oil Proved Reserves (Crude Oil plus Condensate)

Reported oil proved reserves rose by nearly 9 percent to 22.3 billion barrels, driven by net revisions and a fourth

consecutive increase in discoveries (Figure 7). The overall increase in reported oil proved reserves was the

largest in the 33 years that EIA has published estimates.

0

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10

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25

30

35

1979 1982 1985 1988 1991 1994 1997 2000 2003 2006 2009

0

5

10

15

20

25

30

35

U.S. Total

Lower 48 Onshore

Federal Offshore

Alaska

Source: U.S. Energy Information Administration

Figure 7. U.S. Crude Oil plus Condensate Proved Reserves, 1979-2009

billion barrels

The onshore Lower 48 States drove the overall increase in proved reserves. Technologies used to increase

shale gas production have also boosted oil reserves, especially from the Bakken Formation in North Dakota and

Montana. North Dakota recorded especially significant gains, up 83 percent over 2008, and now ranks behind

only Texas, Alaska, California, and the Gulf of Mexico in proved reserves. Higher prices and drilling activity in

the deepwater areas of the Gulf of Mexico Federal Offshore drove that region's second consecutive increase in

oil reserves after 4 consecutive years of decline, and contributed about 13 percent of the overall national

increase in 2009.
9

Oil Proved Reserves Changes in 2009

19

20

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26

Cru

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Oil plu

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2009 Liquids

Pro

duction

20.6

Billion

Barrels

22.3

Billion

Barrels

0.14 0.10

1.31

2.01 0.10 0.05

(1.93)

N

et R

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visions

Pro

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9

Total Discoveries 1.54

Total Reserves Additions 3.69

Figure 8. U.S. Crude Oil plus Condensate Proved Reserves Changes, 2009

Columns may not add due to independent rounding.

Source: U.S. Energy Information Administration

Net Revisions and Other 2.15

Total Discoveries. While net revisions were the primary driver of the overall increase in oil proved reserves in

2009, total discoveries also made a major contribution, adding 1.5 billion barrels, mostly from extensions of

existing fields.

Geographically, the largest volume of total oil discoveries in 2009 came mostly from the established areas of

Texas, with discoveries of 433 million barrels, and the Gulf of Mexico Federal Offshore, with 328 million barrels

of total discoveries. Relative newcomer North Dakota was again a notable source of total discoveries, adding

413 million barrels. These discoveries (mostly extensions) are associated with rapid growth in reserves of the

Bakken Formation and the underlying Three Forks Formation.

Net Revisions and Other Changes. Net revisions added 2.0 billion barrels to oil proved reserves in 2009,

reflecting the major increase in oil prices. Under the new SEC rules, the average spot price for West Texas

Intermediate (WTI) crude oil in 2009 was $61.08 per barrel, an increase of 37 percent over the year-end price in

2008 ($44.60). The low 2008 price was a major driver of near-record negative revisions and the resulting

overall decline in oil proved reserves in 2008. For 2009, the impact of negative revisions on oil proved reserves

was comparatively modest (less than one-third of the 2008 total).

Changes to proved oil reserves associated with buying and selling properties and adjustments were

comparatively minor.

Production. In 2009, operators reported oil production of about 1.9 billion barrels, a rise of 4.6 percent from

2008. The increase was driven by production from the Gulf of Mexico Federal Offshore, particularly from

deepwater fields. Deepwater production has offset steady shallow water declines, and presently accounts for

80 percent of the total Gulf of Mexico Federal Offshore oil production (up from 57 percent 5 years ago). Other

key producing areas include Alaska, California, and Texas.

Maps. Figures 9 and 10 display oil proved reserves by area for 2009, and the annual changes in proved

reserves by area from 2008 to 2009.
10

Figure 9: Oil Proved Reserves by Area, 2009

States with a color but no value displayed above are intentionally unlabelled for confidentiality reasons.

Source: U.S. Energy Information Administration

Figure 10: Changes in Oil Proved Reserves by Area, 2008 to 2009

States with a color but no value displayed above are intentionally unlabelled for confidentiality reasons.

Source: U.S. Energy Information Administration
11

Natural Gas Liquids (NGL) Proved Reserves

In previous annual summaries, the NGL data included both lease condensate and natural gas plant liquids.

Other EIA publications, however, apportion NGL reserves between crude oil and natural gas. Therefore, to

improve comparability across all EIA reserves data offerings, this summary included lease condensate with

crude oil (as liquids) and plant liquids were included in wet natural gas. EIA nevertheless continues to track both

lease condensate and natural gas plant liquids volumes separately, and the 2009 proved reserves changes and

production are summarized in this section.

Lease Condensate

U.S. lease condensate proved reserves increased from 1,433 million barrels in 2008 to 1,633 million barrels in

2009, a 14 percent increase primarily from extensions. Texas had the largest increase in lease condensate

proved reserves in 2009, followed by Wyoming and Oklahoma.

U,S. lease condensate production increased 3 percent from 173 million barrels in 2008 to 178 million barrels in

2009.

Natural Gas Plant Liquids

U.S. natural gas plant liquids reserves increased from 7,842 million barrels in 2008 to 8,557 million barrels in

2009, a 9 percent increase. Texas had the largest volume and largest increase in natural gas plant liquids

proved reserves in 2009, followed by Wyoming and Oklahoma.

U.S. natural gas plant liquids production increased 7 percent from 667 million barrels in 2008 to 714 million

barrels in 2009.
Table 4. Total U.S. Proved Reserves of Wet Natural Gas, and Crude Oil plus Lease Condensate, 2001-2009

Revisionsa Net of Salesb New Reservoir Provedd Change

Net and and New Field Discoveries Totalc Estimated Reserves from

Adjustments Revisions Adjustments Acquisitions Extensions Discoveries in Old Fields Discoveries Production 12/31 Prior Year

Year (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)

Crude Oil plus Lease Condensate (Million Barrels of 42 U.S. Gallons)

2001 -61 -346 -407 -53 1,002 1,480 358 2,840 2,133 23,843 +326

2002 423 682 1,105 51 600 318 187 1,105 2,082 24,023 +180

2003 192 -9 183 -416 530 717 137 1,384 2,068 23,106 -917

2004 80 444 524 37 731 36 159 926 2,001 22,592 -514

2005 237 558 795 327 946 209 57 1,212 1,907 23,019 +427

2006 109 43 152 189 685 38 62 785 1,834 22,311 -708

2007 21 1,275 1,296 44 865 81 87 1,033 1,872 22,812 +501

2008 318 -2,189 -1,871 187 968 166 137 1,271 1,845 20,554 -2,258

2009 46 2,008 2,054 95 1,305 141 95 1,541 1,929 22,315 +1,761

Wet Natural Gas (Billion Cubic Feet, 14.73 psia, 60° Fahrenheit)

2001 1,849 -2,438 -589 2,715 17,183 3,668 2,898 23,749 20,642 191,743 +5,233

2002 4,006 1,038 5,044 428 15,468 1,374 1,752 18,594 20,248 195,561 +3,818

2003 2,323 -1,715 608 1,107 17,195 1,252 1,653 20,100 20,231 197,145 +1,584

2004 170 825 995 1,975 19,068 790 1,244 21,102 20,017 201,200 +4,055

2005 1,693 2,715 4,408 2,674 22,069 973 1,243 24,285 19,259 213,308 +12,108

2006 946 -2,099 -1,153 3,178 22,834 425 1,197 24,456 19,373 220,416 +7,108

2007 990 15,936 16,926 452 28,255 814 1,244 30,313 20,318 247,789 +27,373

2008 271 -3,254 -2,983 937 27,800 1,229 1,678 30,707 21,415 255,035 +7,246

2009 5,923 -1,899 4,024 -222 43,500 1,423 2,656 47,579 22,537 283,879 +28,844

aRevisions and adjustments = Col. 1 + Col. 2.

bNet of sales and acquisitions = acquisitions - sales.

c

Total discoveries = Col. 5 + Col. 6 + Col. 7.

dProved reserves = Col. 10 from prior year + Col. 3 + Col. 4 + Col. 8 - Col. 9.

Notes: Old means discovered in a prior year. New means discovered during the report year. The production estimates in this table are

based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas Reserves” and Form EIA-64A, “Annual Report of the Origin

of Natural Gas Liquids Production.” They may differ from EIA production data for crude oil, lease condensate, and wet natural gas for 2009

contained in the Petroleum Supply Annual 2009 and the Natural Gas Annual 2009.

Sources: U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2001 through 2009 annual reports.
a

Includes Federal offshore Alabama. b

Includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for natural gas for 2009 contained in the Natural Gas Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 7,766 2 1,887 108 5 0 2 0 0 361 9,183

Lower 48 States ............. 247,269 5,921 30,777 34,455 4,372 4,155 43,498 1,423 2,656 22,176 274,696

Alabama ................... 3,379 47 101 337 2 0 21 0 0 261 2,948

Arkansas ................... 5,628 4 1,912 621 54 36 4,629 0 36 698 10,872

California ................... 2,538 8 274 199 4 83 476 1 0 251 2,926

Coastal Region Onshore ..... 151 3 42 15 0 0 0 0 0 12 169

Los Angeles Basin Onshore . . 81 4 38 25 0 0 0 0 0 7 91

San Joaquin Basin Onshore . . 2,249 -1 191 156 4 83 472 1 0 226 2,609

State Offshore ............. 57 2 3 3 0 0 4 0 0 6 57

Colorado ................... 24,169 488 1,672 4,224 391 456 3,495 8 0 1,592 24,081

Florida ..................... 1 6 0 0 0 0 0 0 0 0 7

Kansas .................... 3,795 241 226 430 3 1 26 0 0 356 3,500

Kentucky ................... 2,846 103 132 797 0 0 748 0 0 113 2,919

Louisiana................... 11,816 303 1,901 3,157 130 105 9,893 259 1,555 1,575 20,970

North Onshore ............. 7,966 139 1,174 2,305 84 51 9,580 255 1,496 999 17,273

South Onshore............. 2,916 173 644 637 46 50 298 4 57 490 2,969

State Offshore ............. 934 -9 83 215 0 4 15 0 2 86 728

Michigan ................... 3,253 -314 373 412 0 17 16 19 9 156 2,805

Mississippi.................. 1,035 28 92 252 17 2 133 2 0 101 922

Montana ................... 1,014 140 134 213 3 3 33 0 0 115 993

New Mexico................. 17,347 582 1,498 1,830 309 318 479 1 3 1,445 16,644

East ..................... 4,406 307 596 691 164 252 349 0 3 500 4,558

West .................... 12,941 275 902 1,139 145 66 130 1 0 945 12,086

New York................... 389 -84 39 59 54 0 0 0 0 35 196

North Dakota ................ 603 58 273 91 2 1 450 7 6 92 1,213

Ohio....................... 985 70 70 43 196 79 10 0 0 79 896

Oklahoma .................. 22,113 1,094 3,077 3,819 637 411 3,682 0 189 1,903 24,207

Pennsylvania ................ 3,594 64 671 504 52 603 2,788 128 0 274 7,018

Texas...................... 81,843 1,090 8,382 10,274 2,026 1,661 10,812 518 446 7,418 85,034

RRC District 1 ............. 1,047 3 114 113 38 55 155 390 0 90 1,523

RRC District 2 Onshore ...... 2,364 -86 202 394 23 5 91 12 13 275 1,909

RRC District 3 Onshore ...... 2,932 -119 525 395 186 204 308 66 12 545 2,802

RRC District 4 Onshore ...... 7,930 -89 812 1,488 273 324 531 48 324 1,062 7,057

RRC District 5 ............. 20,460 173 1,928 1,477 32 281 3,029 0 0 1,739 22,623

RRC District 6 ............. 12,619 442 1,886 2,305 370 252 1,731 0 43 1,041 13,257

RRC District 7B ............ 2,750 103 168 225 577 32 372 0 0 199 2,424

RRC District 7C ............ 5,529 69 399 503 101 109 296 0 2 370 5,430

RRC District 8 ............. 7,586 284 924 1,534 290 216 832 2 28 608 7,440

RRC District 8A ............ 1,257 75 170 117 8 18 8 0 0 114 1,289

RRC District 9 ............. 9,548 22 644 532 75 90 2,536 0 14 725 11,522

RRC District 10 ............ 7,601 243 581 1,169 50 75 923 0 0 610 7,594

State Offshore ............. 220 -30 29 22 3 0 0 0 10 40 164

Utah....................... 6,714 71 1,371 501 94 135 167 0 4 456 7,411

Virginia .................... 2,378 339 256 87 0 0 383 0 0 178 3,091

West Virginia ................ 5,266 257 392 886 55 2 1,219 170 9 284 6,090

Wyoming ................... 32,399 1,244 5,501 3,682 181 56 3,646 0 91 2,326 36,748

Federal Offshorea............ 13,892 14 2,365 1,917 162 186 298 310 308 2,438 12,856

Pacific (California) .......... 705 0 79 7 0 0 0 0 0 37 740

Gulf of Mexico (Louisiana)a... 10,785 4 1,690 1,463 128 164 279 50 231 1,947 9,665

Gulf of Mexico (Texas)....... 2,402 10 596 447 34 22 19 260 77 454 2,451

Miscellaneousb.............. 272 68 65 120 0 0 94 0 0 30 349

U.S. Total .................. 255,035 5,923 32,664 34,563 4,377 4,155 43,500 1,423 2,656 22,537 283,879

Table 5. Natural Gas Proved Reserves, Reserves Changes, and Production,

Wet After Lease Separation, 2009 (Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
a

Includes Federal Offshore Alabama. b

Includes Arizona, Missouri, Nevada, New York, South Dakota, Tennessee, and Virginia.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for crude oil for 2009 contained in the Petroleum Supply Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 3,507 0 394 152 7 0 25 9 0 210 3,566

Lower 48 States ............. 17,047 46 2,876 1,110 242 344 1,280 132 95 1,719 18,749

Alabama ................... 52 1 9 2 0 0 0 0 0 7 53

Arkansas ................... 31 2 5 0 3 0 0 0 0 6 29

California ................... 2,705 -17 427 119 3 20 30 0 0 208 2,835

Coastal Region Onshore ..... 255 1 105 4 0 2 0 0 0 18 341

Los Angeles Basin Onshore . . 188 10 98 47 0 0 1 0 0 15 235

San Joaquin Basin Onshore . . 2,125 -30 192 68 3 18 22 0 0 161 2,095

State Offshore ............. 137 2 32 0 0 0 7 0 0 14 164

Colorado ................... 392 -9 28 27 17 2 37 0 0 30 376

Florida ..................... 3 -1 8 0 0 0 0 0 0 1 9

Illinois ..................... 54 3 12 1 0 0 3 0 0 5 66

Indiana .................... 15 -7 1 0 0 0 0 0 0 1 8

Kansas .................... 249 20 49 21 2 2 2 2 3 40 264

Kentucky ................... 21 4 4 3 0 0 0 0 0 2 24

Louisiana................... 487 -1 100 69 9 11 26 0 3 68 480

North Onshore ............. 87 -4 15 6 2 1 1 0 0 11 81

South Onshore............. 341 4 76 57 7 7 24 0 3 48 343

State Offshore ............. 59 -1 9 6 0 3 1 0 0 9 56

Michigan ................... 52 -13 21 17 0 0 0 10 5 6 52

Mississippi.................. 255 -1 30 8 4 0 3 1 0 24 252

Montana ................... 321 21 72 47 3 3 5 0 0 29 343

Nebraska................... 11 0 1 0 0 0 0 0 0 2 10

New Mexico................. 732 3 102 77 16 20 76 0 0 60 780

East ..................... 701 4 95 74 15 19 76 0 0 58 748

West .................... 31 -1 7 3 1 1 0 0 0 2 32

North Dakota ................ 577 12 211 69 4 2 396 12 5 84 1,058

Ohio....................... 42 8 6 0 5 3 0 0 0 4 50

Oklahoma .................. 745 -18 169 93 31 29 64 0 0 63 802

Pennsylvania ................ 17 -1 4 4 0 0 3 0 0 2 17

Texas...................... 4,967 21 653 276 111 210 416 11 6 401 5,496

RRC District 1 ............. 97 -3 19 19 0 0 8 4 0 10 96

RRC District 2 Onshore ...... 67 -7 8 6 0 0 13 0 1 10 66

RRC District 3 Onshore ...... 235 -7 46 29 12 42 19 3 0 40 257

RRC District 4 Onshore ...... 101 -5 20 19 5 3 7 3 1 14 92

RRC District 5 ............. 26 -4 5 1 0 0 1 0 0 3 24

RRC District 6 ............. 221 3 38 29 3 4 8 0 0 18 224

RRC District 7B ............ 101 9 7 7 0 1 1 0 0 10 102

RRC District 7C ............ 389 35 55 25 7 25 69 0 0 32 509

RRC District 8 ............. 1,764 10 201 99 63 87 202 0 4 121 1,985

RRC District 8A ............ 1,704 19 172 15 8 24 4 1 0 111 1,790

RRC District 9 ............. 113 -24 29 9 12 22 45 0 0 15 149

RRC District 10 ............ 143 -3 52 18 1 2 39 0 0 16 198

State Offshore ............. 6 -2 1 0 0 0 0 0 0 1 4

Utah....................... 348 2 126 8 8 26 25 0 0 23 488

West Virginia ................ 26 -1 0 4 0 0 0 0 0 1 20

Wyoming ................... 790 19 123 55 6 0 35 0 0 51 855

Federal Offshorea............ 4,130 0 710 208 20 16 159 96 73 599 4,357

Pacific (California) .......... 357 -1 33 17 0 0 0 0 0 22 350

Gulf of Mexico (Louisiana)a... 3,539 2 616 174 20 14 158 34 57 522 3,704

Gulf of Mexico (Texas)....... 234 -1 61 17 0 2 1 62 16 55 303

Miscellaneousb.............. 25 -1 5 2 0 0 0 0 0 2 25

U.S. Total .................. 20,554 46 3,270 1,262 249 344 1,305 141 95 1,929 22,315

Table 6. Crude Oil plus Lease Condensate Proved Reserves, Reserves Changes, and Production, 2009

(Million Barrels of 42 U.S. Gallons)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
Table 7. Total U.S. Proved Reserves of Crude Oil, Dry Natural Gas, and Lease Condensate, 2001-2009

Revisionsa Net of Salesb New Reservoir Provedd Change

Net and and New Field Discoveries Totalc Estimated Reserves from

Adjustments Revisions Adjustments Acquisitions Extensions Discoveries in Old Fields Discoveries Production 12/31 Prior Year

Year (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)

Crude Oil (Million Barrels of 42 U.S. Gallons)

2001 -4 -158 -162 -87 866 1,407 292 2,565 1,915 22,446 +401

2002 416 720 1,136 24 492 300 154 946 1,875 22,677 +231

2003 163 94 257 -398 426 705 101 1,232 1,877 21,891 -786

2004 74 420 494 23 617 33 132 782 1,819 21,371 -520

2005 221 569 790 278 805 205 41 1,051 1,733 21,757 +386

2006 94 2 96 194 504 30 43 577 1,652 20,972 -785

2007 65 1,200 1,265 -19 651 66 73 790 1,691 21,317 +345

2008 278 -2,039 -1,761 166 805 142 124 1,071 1,672 19,121 -2,196

2009 -4 1,863 1,859 95 1,155 122 81 1,358 1,751 20,682 +1,561

Dry Natural Gas (Billion Cubic Feet, 14.73 psia, 60° Fahrenheit)

2001 2,742 -2,318 424 2,630 16,380 3,578 2,800 22,758 19,779 183,460 +6,033

2002 3,727 937 4,664 380 14,769 1,332 1,694 17,795 19,353 186,946 +3,486

2003 2,841 -1,638 1,203 1,034 16,454 1,222 1,610 19,286 19,425 189,044 +2,098

2004 -114 744 630 1,844 18,198 759 1,206 20,163 19,168 192,513 +3,469

2005 1,887 2,699 4,586 2,544 21,050 942 1,208 23,200 18,458 204,385 +11,872

2006 743 -1,836 -1,093 2,996 21,778 409 1,155 23,342 18,545 211,085 +6,700

2007 1,147 15,461 16,608 408 27,107 796 1,188 29,091 19,466 237,726 +26,641

2008 207 -3,128 -2,921 895 26,687 1,170 1,622 29,479 20,523 244,656 +6,930

2009 5,098 -1,619 3,479 -141 42,139 1,372 2,598 46,109 21,594 272,509 +27,853

Lease Condensate (Million Barrels of 42 U.S. Gallons)

2001 -57 -188 -245 34 136 73 66 275 218 1,397 -75

2002 7 -38 -31 27 108 18 33 159 207 1,346 -51

2003 29 -103 -74 -18 104 12 36 152 191 1,215 -131

2004 6 24 30 14 114 3 27 144 182 1,221 +6

2005 16 -11 5 49 141 4 16 161 174 1,262 +41

2006 15 41 56 -5 181 8 19 208 182 1,339 +77

2007 -44 75 31 63 214 15 14 243 181 1,495 +156

2008 40 -150 -110 21 163 24 13 200 173 1,433 -62

2009 50 145 195 0 150 19 14 183 178 1,633 +200

aRevisions and adjustments = Col. 1 + Col. 2.

bNet of sales and acquisitions = acquisitions - sales.

c

Total discoveries = Col. 5 + Col. 6 + Col. 7.

dProved reserves = Col. 10 from prior year + Col. 3 + Col. 4 + Col. 8 - Col. 9.

Notes: Old means discovered in a prior year. New means discovered during the report year. The production estimates in this table are

based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas Reserves” and Form EIA-64A, “Annual Report of the Origin

of Natural Gas Liquids Production.” They may differ from EIA production data for crude oil, natural gas, and natural gas liquids for 2009

contained in the Petroleum Supply Annual 2009 and the Natural Gas Annual 2009.

Sources: U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2001 through 2009 annual reports.
a

Indicates the estimate is associated with a sampling error (95 percent confidence interval) that exceeds 20 percent of the estimated value. b

Includes Arizona, Missouri, Nevada, New York, South Dakota, Tennessee, and Virginia.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for crude oil for 2009 contained in the Petroleum Supply Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 3,507 0 394 152 7 0 25 9 0 210 3,566

Lower 48 States ............. 15,614 -4 2,483 862 205 307 1,130 113 81 1,541 17,116

Alabama ................... 38 0 6 2 0 0 0 0 0 5 37

Arkansas ................... 30 2 5 0 3 0 0 0 0 6 28

California ................... 2,705 -17 427 119 3 20 30 0 0 208 2,835

Coastal Region Onshore ..... 255 1 105 4 0 2 0 0 0 18 341

Los Angeles Basin Onshore . . 188 10 98 47 0 0 1 0 0 15 235

San Joaquin Basin Onshore . . 2,125 -30 192 68 3 18 22 0 0 161 2,095

State Offshore ............. 137 2 32 0 0 0 7 0 0 14 164

Colorado ................... 288 -9 13 16 5 1 30 0 0 23 279

Florida ..................... 3 -1 8 0 0 0 0 0 0 1 9

Illinois ..................... 54 3 12 1 0 0 3 0 0 5 66

Indiana .................... 15 -7 1 0 0 0 0 0 0 1 8

Kansas .................... 243 20 47 19 2 2 2 2 3 39 259

Kentucky ................... 17 5 1 1 0 0 0 0 0 2 20

Louisiana................... 388 -13 67 45 7 9 20 0 1 50 370

North Onshore ............. 60 -9 12 1 1 0 1 0 0 7 55

South Onshore............. 277 -3 50 39 6 6 19 0 1 36 269

State Offshore ............. 51 -1 5 5 0 3 0 0 0 7 46

Michigan ................... 48 -12 4 17 0 0 0 10 5 5 33

Mississippi.................. 249 -3 30 6 4 0 0 1 0 23 244

Montana ................... 321 21 72 47 3 3 5 0 0 29 343

Nebraska................... 8 2 1 0 0 0 0 0 0 2 9

New Mexico................. 654 1 90 66 14 16 72 0 0 53 700

East ..................... 644 0 88 66 14 16 72 0 0 52 688

West .................... 10 1 2 0 0 0 0 0 0 1 12

North Dakota ................ 573 12 202 68 4 2 396 12 5 84 1,046

Ohio....................... 38 3 5 0 5 0 0 0 0 3 38

Oklahoma .................. 581 -18 146 57 26 24 18 0 0 46 622

Pennsylvania ................ 14 -3 2 2 0 0 0 0 0 1 10

Texas...................... 4,555 -11 544 196 102 189 365 1 4 343 5,006

RRC District 1 ............. 92 -8 18 18 0 0 7 0 0 9 82

RRC District 2 Onshore ...... 50 -10 6 0 0 0 12 0 0 7 51

RRC District 3 Onshore ...... 170 -10 26 19 11 41 9 0 0 23 183

RRC District 4 Onshore ...... 22 -3 5 3 0 0 0 0 0 3 18

RRC District 5 ............. 20 -6 4 1 0 0 1 0 0 2 16

RRC District 6 ............. 143 -2 14 16 1 0 2 0 0 11 129

RRC District 7B ............ 96 8 6 6 0 1 1 0 0 9 97

RRC District 7C ............ 359 30 51 17 7 24 64 0 0 29 475

RRC District 8 ............. 1,745 5 197 93 63 80 199 0 4 118 1,956

RRC District 8A ............ 1,699 18 172 14 8 19 4 1 0 111 1,780

RRC District 9 ............. 95 -25 18 4 12 22 43 0 0 13 124

RRC District 10 ............ 62 -7 27 5 0 2 23 0 0 8 94

State Offshore ............. 2 -1 0 0 0 0 0 0 0 0 1

Utah....................... 286 0 90 1 7 26 24 0 0 20 398

West Virginia ................ 23 1 0 4 0 0 0 0 0 1 19

Wyoming ................... 556 12 67 21 5 0 12 0 0 38 583

Federal Offshorea............ 3,903 8 638 172 15 15 153 87 63 551 4,129

Pacific (California) .......... 357 0 28 15 0 0 0 0 0 22 348

Gulf of Mexico (Louisiana)a... 3,388 6 576 143 15 13 153 34 52 494 3,570

Gulf of Mexico (Texas)....... 158 2 34 14 0 2 0 53 11 35 211

Miscellaneousb.............. 24 0 5 2 0 0 0 0 0 2 25

U.S. Total .................. 19,121 -4 2,877 1,014 212 307 1,155 122 81 1,751 20,682

Table 8. Crude Oil Proved Reserves, Reserves Changes, and Production, 2009

(Million Barrels of 42 U.S. Gallons)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
a

Includes Federal offshore Alabama. b

Includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves,” and Form EIA-64A, “Annual Report of the Origin of Natural Gas Liquids Production.” They may differ from EIA production data for

natural gas for 2009 contained in the Natural Gas Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 7,699 3 1,868 108 5 0 2 0 0 358 9,101

Lower 48 States ............. 236,957 5,095 29,548 32,927 4,104 3,968 42,137 1,372 2,598 21,236 263,408

Alabama ................... 3,290 46 99 328 2 0 20 0 0 254 2,871

Arkansas ................... 5,626 5 1,912 621 54 36 4,627 0 36 698 10,869

California ................... 2,406 11 259 189 4 78 450 1 0 239 2,773

Coastal Region Onshore ..... 146 2 41 14 0 0 0 0 0 12 163

Los Angeles Basin Onshore . . 75 5 35 24 0 0 0 0 0 7 84

San Joaquin Basin Onshore . . 2,128 2 180 148 4 78 446 1 0 214 2,469

State Offshore ............. 57 2 3 3 0 0 4 0 0 6 57

Colorado ................... 23,302 306 1,601 4,044 374 437 3,346 8 0 1,524 23,058

Florida ..................... 1 6 0 0 0 0 0 0 0 0 7

Kansas .................... 3,557 224 212 403 2 1 24 0 0 334 3,279

Kentucky ................... 2,714 97 126 760 0 0 713 0 0 108 2,782

Louisiana................... 11,573 319 1,863 3,105 127 103 9,807 257 1,542 1,544 20,688

North Onshore ............. 7,876 167 1,166 2,288 83 51 9,508 253 1,485 992 17,143

South Onshore............. 2,799 159 617 610 44 48 285 4 55 469 2,844

State Offshore ............. 898 -7 80 207 0 4 14 0 2 83 701

Michigan ................... 3,174 -279 367 406 0 16 16 19 9 153 2,763

Mississippi.................. 1,030 26 92 250 17 2 132 2 0 100 917

Montana ................... 1,000 135 132 210 3 3 32 0 0 113 976

New Mexico................. 16,285 525 1,396 1,708 287 292 441 1 3 1,350 15,598

East ..................... 4,031 251 541 628 149 229 317 0 3 454 4,141

West .................... 12,254 274 855 1,080 138 63 124 1 0 896 11,457

New York................... 389 -84 39 59 54 0 0 0 0 35 196

North Dakota ................ 541 47 243 81 2 1 401 6 5 82 1,079

Ohio....................... 985 70 70 43 196 79 10 0 0 79 896

Oklahoma .................. 20,845 984 2,894 3,592 600 387 3,463 0 178 1,790 22,769

Pennsylvania ................ 3,577 65 668 502 52 600 2,774 128 0 273 6,985

Texas...................... 77,546 745 7,936 9,658 1,852 1,563 10,260 476 425 7,017 80,424

RRC District 1 ............. 985 -22 105 104 35 50 143 358 0 82 1,398

RRC District 2 Onshore ...... 2,238 -90 190 372 22 5 86 11 13 259 1,800

RRC District 3 Onshore ...... 2,752 -124 490 369 174 190 288 61 11 509 2,616

RRC District 4 Onshore ...... 7,604 -127 774 1,419 260 309 506 45 309 1,013 6,728

RRC District 5 ............. 20,281 96 1,904 1,458 31 277 2,992 0 0 1,718 22,343

RRC District 6 ............. 12,184 423 1,820 2,225 358 243 1,671 0 41 1,004 12,795

RRC District 7B ............ 2,382 63 144 193 494 27 319 0 0 171 2,077

RRC District 7C ............ 4,946 29 355 447 90 97 263 0 2 328 4,827

RRC District 8 ............. 6,824 233 828 1,375 260 194 747 1 25 545 6,672

RRC District 8A ............ 1,172 87 161 111 8 17 8 0 0 108 1,218

RRC District 9 ............. 9,037 18 610 503 71 86 2,400 0 14 687 10,904

RRC District 10 ............ 6,922 188 526 1,060 46 68 837 0 0 553 6,882

State Offshore ............. 219 -29 29 22 3 0 0 0 10 40 164

Utah....................... 6,643 1 1,342 491 92 133 164 0 4 447 7,257

Virginia .................... 2,378 339 256 87 0 0 383 0 0 178 3,091

West Virginia ................ 5,136 258 383 865 54 2 1,190 166 8 278 5,946

Wyoming ................... 31,143 1,158 5,281 3,535 174 54 3,501 0 88 2,233 35,283

Federal Offshorea............ 13,546 22 2,312 1,871 158 181 289 308 300 2,377 12,552

Pacific (California) .......... 704 0 79 7 0 0 0 0 0 37 739

Gulf of Mexico (Louisiana)a... 10,450 2 1,637 1,417 124 159 270 48 223 1,886 9,362

Gulf of Mexico (Texas)....... 2,392 20 596 447 34 22 19 260 77 454 2,451

Miscellaneousb.............. 270 69 65 119 0 0 94 0 0 30 349

U.S. Total .................. 244,656 5,098 31,416 33,035 4,109 3,968 42,139 1,372 2,598 21,594 272,509

Table 9. Dry Natural Gas Proved Reserves, Reserves Changes, and Production, 2009

(Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
a

Includes Federal Offshore Alabama. b

Includes Arizona, Nebraska, Nevada, New York, Ohio, Pennsylvania, South Dakota, Tennessee, and Virginia.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for lease condensate for 2009 contained in the Petroleum Supply Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 0 0 0 0 0 0 0 0 0 0 0

Lower 48 States ............. 1,433 50 393 248 37 37 150 19 14 178 1,633

Alabama ................... 14 1 3 0 0 0 0 0 0 2 16

Arkansas ................... 1 0 0 0 0 0 0 0 0 0 1

California ................... 0 0 0 0 0 0 0 0 0 0 0

Coastal Region Onshore ..... 0 0 0 0 0 0 0 0 0 0 0

Los Angeles Basin Onshore . . 0 0 0 0 0 0 0 0 0 0 0

San Joaquin Basin Onshore . . 0 0 0 0 0 0 0 0 0 0 0

State Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Colorado ................... 104 0 15 11 12 1 7 0 0 7 97

Florida ..................... 0 0 0 0 0 0 0 0 0 0 0

Kansas .................... 6 0 2 2 0 0 0 0 0 1 5

Kentucky ................... 4 -1 3 2 0 0 0 0 0 0 4

Louisiana................... 99 12 33 24 2 2 6 0 2 18 110

North Onshore ............. 27 5 3 5 1 1 0 0 0 4 26

South Onshore............. 64 7 26 18 1 1 5 0 2 12 74

State Offshore ............. 8 0 4 1 0 0 1 0 0 2 10

Michigan ................... 4 -1 17 0 0 0 0 0 0 1 19

Mississippi.................. 6 2 0 2 0 0 3 0 0 1 8

Montana ................... 0 0 0 0 0 0 0 0 0 0 0

New Mexico................. 78 2 12 11 2 4 4 0 0 7 80

East ..................... 57 4 7 8 1 3 4 0 0 6 60

West .................... 21 -2 5 3 1 1 0 0 0 1 20

North Dakota ................ 4 0 9 1 0 0 0 0 0 0 12

Oklahoma .................. 164 0 23 36 5 5 46 0 0 17 180

Texas...................... 412 32 109 80 9 21 51 10 2 58 490

RRC District 1 ............. 5 5 1 1 0 0 1 4 0 1 14

RRC District 2 Onshore ...... 17 3 2 6 0 0 1 0 1 3 15

RRC District 3 Onshore ...... 65 3 20 10 1 1 10 3 0 17 74

RRC District 4 Onshore ...... 79 -2 15 16 5 3 7 3 1 11 74

RRC District 5 ............. 6 2 1 0 0 0 0 0 0 1 8

RRC District 6 ............. 78 5 24 13 2 4 6 0 0 7 95

RRC District 7B ............ 5 1 1 1 0 0 0 0 0 1 5

RRC District 7C ............ 30 5 4 8 0 1 5 0 0 3 34

RRC District 8 ............. 19 5 4 6 0 7 3 0 0 3 29

RRC District 8A ............ 5 1 0 1 0 5 0 0 0 0 10

RRC District 9 ............. 18 1 11 5 0 0 2 0 0 2 25

RRC District 10 ............ 81 4 25 13 1 0 16 0 0 8 104

State Offshore ............. 4 -1 1 0 0 0 0 0 0 1 3

Utah....................... 62 2 36 7 1 0 1 0 0 3 90

West Virginia ................ 3 -2 0 0 0 0 0 0 0 0 1

Wyoming ................... 234 7 56 34 1 0 23 0 0 13 272

Federal Offshorea............ 227 -8 72 36 5 1 6 9 10 48 228

Pacific (California) .......... 0 -1 5 2 0 0 0 0 0 0 2

Gulf of Mexico (Louisiana)a... 151 -4 40 31 5 1 5 0 5 28 134

Gulf of Mexico (Texas)....... 76 -3 27 3 0 0 1 9 5 20 92

Miscellaneousb.............. 11 4 3 2 0 3 3 0 0 2 20

U.S. Total .................. 1,433 50 393 248 37 37 150 19 14 178 1,633

Table 10. Lease Condensate Proved Reserves, Reserves Changes, and Production, 2009

(Million Barrels of 42 U.S. Gallons)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
a

Includes Federal offshore Alabama. b

Includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for natural gas for 2009 contained in the Natural Gas Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 1,139 1 191 103 4 0 2 0 0 136 1,090

Lower 48 States ............. 224,873 5,045 26,951 31,762 3,809 3,477 40,829 1,160 2,487 19,845 249,406

Alabama ................... 3,360 42 90 336 2 0 21 0 0 256 2,919

Arkansas ................... 5,616 -8 1,907 621 49 36 4,629 0 36 694 10,852

California ................... 621 2 97 60 0 25 6 1 0 80 612

Coastal Region Onshore ..... 1 1 0 1 0 0 0 0 0 0 1

Los Angeles Basin Onshore . . 0 0 0 0 0 0 0 0 0 0 0

San Joaquin Basin Onshore . . 617 1 96 59 0 25 4 1 0 78 607

State Offshore ............. 3 0 1 0 0 0 2 0 0 2 4

Colorado ................... 22,159 474 1,661 4,039 382 446 3,330 8 0 1,458 22,199

Kansas .................... 3,710 246 205 421 3 1 25 0 0 346 3,417

Kentucky ................... 2,812 103 130 793 0 0 748 0 0 113 2,887

Louisiana................... 10,581 244 1,785 2,858 114 87 9,826 259 1,550 1,462 19,898

North Onshore ............. 7,888 154 1,168 2,296 82 51 9,580 255 1,494 992 17,220

South Onshore............. 2,445 98 572 522 32 36 231 4 56 425 2,463

State Offshore ............. 248 -8 45 40 0 0 15 0 0 45 215

Michigan ................... 3,105 -286 334 307 0 17 16 0 0 151 2,728

Mississippi.................. 990 6 85 232 7 2 133 0 0 93 884

Montana ................... 817 56 8 148 0 0 28 0 0 80 681

New Mexico................. 15,592 412 1,196 1,531 245 252 246 1 3 1,264 14,662

East ..................... 2,737 149 298 406 100 186 116 0 3 325 2,658

West .................... 12,855 263 898 1,125 145 66 130 1 0 939 12,004

New York................... 360 -55 39 59 54 0 0 0 0 35 196

North Dakota ................ 119 11 28 8 0 0 6 0 0 13 143

Ohio....................... 886 68 57 35 196 78 10 0 0 69 799

Oklahoma .................. 21,155 922 2,716 3,661 396 344 3,630 0 189 1,784 23,115

Pennsylvania ................ 3,467 52 668 493 52 591 2,788 128 0 264 6,885

Texas...................... 74,284 864 7,249 9,534 1,850 1,325 9,734 497 419 6,716 76,272

RRC District 1 ............. 987 5 110 110 38 55 141 390 0 84 1,456

RRC District 2 Onshore ...... 2,292 -101 194 364 23 5 80 0 13 259 1,837

RRC District 3 Onshore ...... 2,453 -105 456 338 152 147 270 58 12 475 2,326

RRC District 4 Onshore ...... 7,803 -94 798 1,456 273 324 530 48 324 1,043 6,961

RRC District 5 ............. 20,420 130 1,921 1,412 32 281 3,029 0 0 1,735 22,602

RRC District 6 ............. 12,207 426 1,801 2,271 370 252 1,708 0 43 990 12,806

RRC District 7B ............ 2,682 106 152 221 577 32 335 0 0 187 2,322

RRC District 7C ............ 4,147 56 175 444 83 53 93 0 0 273 3,724

RRC District 8 ............. 4,506 150 491 1,242 188 97 491 1 3 359 3,950

RRC District 8A ............ 63 -1 2 21 0 1 6 0 0 7 43

RRC District 9 ............. 9,390 98 628 514 69 21 2,234 0 14 702 11,100

RRC District 10 ............ 7,119 223 492 1,120 42 57 817 0 0 562 6,984

State Offshore ............. 215 -29 29 21 3 0 0 0 10 40 161

Utah....................... 6,393 67 1,181 499 90 69 108 0 4 423 6,810

Virginia .................... 2,378 339 256 87 0 0 383 0 0 178 3,091

West Virginia ................ 5,243 249 392 881 55 2 1,219 170 9 282 6,066

Wyoming ................... 32,176 1,209 5,344 3,652 172 37 3,641 0 91 2,288 36,386

Federal Offshorea............ 8,786 2 1,511 1,400 142 165 208 96 186 1,779 7,633

Pacific (California) .......... 3 -1 8 0 0 0 0 0 0 1 9

Gulf of Mexico (Louisiana)a... 6,846 -3 997 1,021 108 152 189 25 150 1,425 5,802

Gulf of Mexico (Texas)....... 1,937 6 506 379 34 13 19 71 36 353 1,822

Miscellaneousb.............. 263 26 12 107 0 0 94 0 0 17 271

U.S. Total .................. 226,012 5,046 27,142 31,865 3,813 3,477 40,831 1,160 2,487 19,981 250,496

Table 11. Nonassociated Natural Gas Proved Reserves, Reserves Changes, and Production,

Wet After Lease Separation, 2009 (Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
a

Includes Federal offshore Alabama. b

Includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, Oregon, South Dakota, and Tennessee.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves.” They may differ from EIA production data for natural gas for 2009 contained in the Natural Gas Annual 2009.

Source: U.S. Energy Information Administration.

Alaska ..................... 6,627 1 1,696 5 1 0 0 0 0 225 8,093

Lower 48 States ............. 22,396 876 3,826 2,693 563 678 2,669 263 169 2,331 25,290

Alabama ................... 19 5 11 1 0 0 0 0 0 5 29

Arkansas ................... 12 12 5 0 5 0 0 0 0 4 20

California ................... 1,917 6 177 139 4 58 470 0 0 171 2,314

Coastal Region Onshore ..... 150 2 42 14 0 0 0 0 0 12 168

Los Angeles Basin Onshore . . 81 4 38 25 0 0 0 0 0 7 91

San Joaquin Basin Onshore . . 1,632 -2 95 97 4 58 468 0 0 148 2,002

State Offshore ............. 54 2 2 3 0 0 2 0 0 4 53

Colorado ................... 2,010 14 11 185 9 10 165 0 0 134 1,882

Florida ..................... 1 6 0 0 0 0 0 0 0 0 7

Kansas .................... 85 -5 21 9 0 0 1 0 0 10 83

Kentucky ................... 34 0 2 4 0 0 0 0 0 0 32

Louisiana................... 1,235 59 116 299 16 18 67 0 5 113 1,072

North Onshore ............. 78 -15 6 9 2 0 0 0 2 7 53

South Onshore............. 471 75 72 115 14 14 67 0 1 65 506

State Offshore ............. 686 -1 38 175 0 4 0 0 2 41 513

Michigan ................... 148 -28 39 105 0 0 0 19 9 5 77

Mississippi.................. 45 22 7 20 10 0 0 2 0 8 38

Montana ................... 197 84 126 65 3 3 5 0 0 35 312

New Mexico................. 1,755 170 302 299 64 66 233 0 0 181 1,982

East ..................... 1,669 158 298 285 64 66 233 0 0 175 1,900

West .................... 86 12 4 14 0 0 0 0 0 6 82

New York................... 29 -29 0 0 0 0 0 0 0 0 0

North Dakota ................ 484 47 245 83 2 1 444 7 6 79 1,070

Ohio....................... 99 2 13 8 0 1 0 0 0 10 97

Oklahoma .................. 958 172 361 158 241 67 52 0 0 119 1,092

Pennsylvania ................ 127 12 3 11 0 12 0 0 0 10 133

Texas...................... 7,559 226 1,133 740 176 336 1,078 21 27 702 8,762

RRC District 1 ............. 60 -2 4 3 0 0 14 0 0 6 67

RRC District 2 Onshore ...... 72 15 8 30 0 0 11 12 0 16 72

RRC District 3 Onshore ...... 479 -14 69 57 34 57 38 8 0 70 476

RRC District 4 Onshore ...... 127 5 14 32 0 0 1 0 0 19 96

RRC District 5 ............. 40 43 7 65 0 0 0 0 0 4 21

RRC District 6 ............. 412 16 85 34 0 0 23 0 0 51 451

RRC District 7B ............ 68 -3 16 4 0 0 37 0 0 12 102

RRC District 7C ............ 1,382 13 224 59 18 56 203 0 2 97 1,706

RRC District 8 ............. 3,080 134 433 292 102 119 341 1 25 249 3,490

RRC District 8A ............ 1,194 76 168 96 8 17 2 0 0 107 1,246

RRC District 9 ............. 158 -76 16 18 6 69 302 0 0 23 422

RRC District 10 ............ 482 20 89 49 8 18 106 0 0 48 610

State Offshore ............. 5 -1 0 1 0 0 0 0 0 0 3

Utah....................... 321 4 190 2 4 66 59 0 0 33 601

West Virginia ................ 23 8 0 5 0 0 0 0 0 2 24

Wyoming ................... 223 35 157 30 9 19 5 0 0 38 362

Federal Offshorea............ 5,106 12 854 517 20 21 90 214 122 659 5,223

Pacific (California) .......... 702 1 71 7 0 0 0 0 0 36 731

Gulf of Mexico (Louisiana)a... 3,939 7 693 442 20 12 90 25 81 522 3,863

Gulf of Mexico (Texas)....... 465 4 90 68 0 9 0 189 41 101 629

Miscellaneousb.............. 9 42 53 13 0 0 0 0 0 13 78

U.S. Total .................. 29,023 877 5,522 2,698 564 678 2,669 263 169 2,556 33,383

Table 12. Associated-Dissolved Natural Gas Proved Reserves, Reserves Changes, and Production

Wet After Lease Separation, 2009 (Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
Table 13. Shale Gas Proved Reserves and Production, 2007 - 2009

(Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Reserves Production

State and Subdivision 2007 2008 2009 2007 2008 2009

Alaska .................. 0 0 0 0 0 0

Lower 48 States .......... 23,304 34,428 60,644 1,293 2,116 3,110

Alabama ................. 1 2 0 0 0 0

Arkansas ................ 1,460 3,833 9,070 94 279 527

California ................ 0 0 0 0 0 0

Colorado................. 0 0 4 0 0 1

Florida .................. 0 0 0 0 0 0

Kansas .................. 0 0 0 0 0 0

Kentucky ................ 21 20 55 2 2 5

Louisiana ................ 6 858 9,307 1 23 293

North .................. 6 858 9,307 1 23 293

South.................. 0 0 0 0 0 0

State Offshore ........... 0 0 0 0 0 0

Michigan................. 3,281 2,894 2,499 148 122 132

Mississippi ............... 0 0 0 0 0 0

Montana ................. 140 125 137 12 13 7

New Mexico .............. 12 0 36 2 0 2

East ................... 12 0 7 2 0 1

West .................. 0 0 29 0 0 1

New York ................ 0 0 0 0 0 0

North Dakota ............. 21 24 368 3 3 25

Ohio .................... 0 0 0 0 0 0

Oklahoma................ 944 3,845 6,389 40 168 249

Pennsylvania ............. 96 88 3,790 1 1 65

Texas ................... 17,256 22,667 28,167 988 1,503 1,789

RRC District 1 ........... 0 2 435 0 0 11

RRC District 2 Onshore.... 0 0 0 0 0 0

RRC District 3 Onshore.... 0 0 0 0 0 0

RRC District 4 Onshore.... 0 0 78 0 0 5

RRC District 5 ........... 8,099 11,408 13,691 437 769 954

RRC District 6 ........... 0 173 1,161 0 3 28

RRC District 7B .......... 2,018 2,336 2,022 90 141 145

RRC District 7C .......... 0 0 0 0 0 0

RRC District 8 ........... 5 48 24 1 4 3

RRC District 8A .......... 0 0 0 0 0 0

RRC District 9 ........... 7,134 8,700 10,756 460 586 643

RRC District 10 .......... 0 0 0 0 0 0

State Offshore ........... 0 0 0 0 0 0

Utah .................... 0 0 0 0 0 0

Virginia .................. 0 0 0 0 0 0

West Virginia ............. 0 14 688 0 0 11

Wyoming ................ 0 0 0 0 0 0

Federal Offshore .......... 0 0 0 0 0 0

Miscellaneousa............ 66 58 134 2 2 4

U.S. Total................ 23,304 34,428 60,644 1,293 2,116 3,110

a

Includes Indiana, Missouri, and Tennessee.

Note: The above table is based on shale gas proved reserves and production volumes as reported to the EIA on Form EIA-23 "Annual Survey of Domestic

Oil and Gas Reserves." It does not include EIA-estimated volumes for the non-surveyed operators. For this and other reasons (e.g. incorrect or incomplete

respondent submissions, respondent mis-identification of shale vs non-shale reservoirs) the actual proved reserves and production of shale plays may be

higher or lower. The production estimates are offered only as an observed indicator of production trends and may differ from production volumes listed

elsewhere on the EIA web page.

Sources: U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2007 through 2009 annual reports, DOE/EIA-0216.
a

Includes Indiana, Missouri, and Tennessee.

Note: The above table is based on shale gas proved reserves and production volumes as reported to the EIA on Form EIA-23 "Annual

Survey of Domestic Oil and Gas Reserves." It does not include EIA-estimated volumes for the non-surveyed operators. For this and other

reasons (e.g. incorrect or incomplete respondent submissions, respondent mis-identification of shale vs non-shale reservoirs) the actual

proved reserves and production of shale plays may be higher or lower. The production estimates are offered only as an observed indicator of

production trends and may differ from production volumes listed elsewhere on the EIA web page.

Source: U.S. Energy Information Administration.

Alaska ..................... 0 0 0 0 0 0 0 0 0 0 0

Lower 48 States ............. 34,428 1,690 6,363 3,642 563 665 22,332 868 1,613 3,110 60,644

Alabama ................... 2 0 0 2 0 0 0 0 0 0 0

Arkansas ................... 3,833 2 1,585 261 3 0 4,441 0 0 527 9,070

California ................... 0 0 0 0 0 0 0 0 0 0 0

Colorado ................... 0 1 0 0 0 0 0 4 0 1 4

Florida ..................... 0 0 0 0 0 0 0 0 0 0 0

Kansas .................... 0 0 0 0 0 0 0 0 0 0 0

Kentucky ................... 20 -1 44 3 0 0 0 0 0 5 55

Louisiana................... 858 131 636 826 3 0 7,183 244 1,377 293 9,307

North Onshore ............. 858 131 636 826 3 0 7,183 244 1,377 293 9,307

South Onshore............. 0 0 0 0 0 0 0 0 0 0 0

State Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Michigan ................... 2,894 -167 149 276 0 16 15 0 0 132 2,499

Mississippi.................. 0 0 0 0 0 0 0 0 0 0 0

Montana ................... 125 8 42 34 2 2 3 0 0 7 137

New Mexico................. 0 10 2 2 0 0 28 0 0 2 36

East ..................... 0 10 0 2 0 0 0 0 0 1 7

West .................... 0 0 2 0 0 0 28 0 0 1 29

New York................... 0 0 0 0 0 0 0 0 0 0 0

North Dakota ................ 24 101 119 17 1 1 159 6 1 25 368

Ohio....................... 0 0 0 0 0 0 0 0 0 0 0

Oklahoma .................. 3,845 1 1,373 865 0 0 2,122 0 162 249 6,389

Pennsylvania ................ 88 450 299 53 0 542 2,409 120 0 65 3,790

Texas...................... 22,667 990 2,052 1,267 554 104 5,546 353 65 1,789 28,167

RRC District 1 ............. 2 5 1 0 0 0 85 353 0 11 435

RRC District 2 Onshore ...... 0 0 0 0 0 0 0 0 0 0 0

RRC District 3 Onshore ...... 0 0 0 0 0 0 0 0 0 0 0

RRC District 4 Onshore ...... 0 53 0 0 0 0 0 0 30 5 78

RRC District 5 ............. 11,408 657 928 587 5 21 2,223 0 0 954 13,691

RRC District 6 ............. 173 40 422 8 0 0 541 0 21 28 1,161

RRC District 7B ............ 2,337 56 119 181 496 24 308 0 0 145 2,022

RRC District 7C ............ 0 0 0 0 0 0 0 0 0 0 0

RRC District 8 ............. 48 -1 2 22 0 0 0 0 0 3 24

RRC District 8A ............ 0 0 0 0 0 0 0 0 0 0 0

RRC District 9 ............. 8,700 179 580 469 53 59 2,389 0 14 643 10,756

RRC District 10 ............ 0 0 0 0 0 0 0 0 0 0 0

State Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Utah....................... 0 0 0 0 0 0 0 0 0 0 0

Virginia .................... 0 0 0 0 0 0 0 0 0 0 0

West Virginia ................ 14 140 58 13 0 0 351 141 8 11 688

Wyoming ................... 0 1 0 1 0 0 0 0 0 0 0

Federal Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Miscellaneousa.............. 58 23 4 22 0 0 75 0 0 4 134

U.S. Total .................. 34,428 1,690 6,363 3,642 563 665 22,332 868 1,613 3,110 60,644

Table 14. Shale Gas Proved Reserves, Reserves Changes, and Production,

Wet After Lease Separation, 2009 (Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
Table 15. Coalbed Methane Proved Reserves and Production, 2005 - 2009

(Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Reserves Production

State and Subdivision 2005 2006 2007 2008 2009 2005 2006 2007 2008 2009

Alaska .................... 0 0 0 0 0 0 0 0 0 0

Lower 48 States ............ 19,892 19,620 21,874 20,798 18,578 1,732 1,758 1,753 1,966 1,914

Alabama................... 1,773 2,068 2,126 1,727 1,342 113 114 114 107 105

Arkansas .................. 30 34 31 31 22 2 3 3 3 3

California .................. 0 0 0 0 0 0 0 0 0 0

Colorado................... 6,772 6,344 7,869 8,238 7,348 515 477 519 497 498

Florida .................... 0 0 0 0 0 0 0 0 0 0

Kansas .................... 257 234 340 301 163 17 25 38 47 43

Kentucky .................. 0 0 0 0 0 0 0 0 0 0

Louisiana .................. 0 1 7 9 0 0 0 0 1 1

North.................... 0 1 7 9 0 0 0 0 1 1

South Onshore ............ 0 0 0 0 0 0 0 0 0 0

State Offshore ............ 0 0 0 0 0 0 0 0 0 0

Michigan................... 0 0 0 0 0 0 0 0 0 0

Mississippi ................. 0 0 0 0 0 0 0 0 0 0

Montana ................... 73 77 66 75 37 12 12 13 14 12

New Mexico ................ 5,249 4,894 4,169 3,991 3,646 514 510 394 443 432

East .................... 335 322 389 530 474 25 26 23 23 26

West .................... 4,914 4,572 3,780 3,461 3,172 489 484 371 420 406

New York .................. 0 0 0 0 0 0 0 0 0 0

North Dakota ............... 0 0 0 0 0 0 0 0 0 0

Ohio ...................... 0 1 1 1 0 0 0 0 0 0

Oklahoma.................. 568 684 1,265 511 338 58 68 82 69 55

Pennsylvania ............... 45 50 108 102 131 3 5 5 11 16

Texas ..................... 0 0 0 0 0 0 0 0 0 0

RRC District 1............. 0 0 0 0 0 0 0 0 0 0

RRC District 2 Onshore ..... 0 0 0 0 0 0 0 0 0 0

RRC District 3 Onshore ..... 0 0 0 0 0 0 0 0 0 0

RRC District 4 Onshore ..... 0 0 0 0 0 0 0 0 0 0

RRC District 5............. 0 0 0 0 0 0 0 0 0 0

RRC District 6............. 0 0 0 0 0 0 0 0 0 0

RRC District 7B ........... 0 0 0 0 0 0 0 0 0 0

RRC District 7C ........... 0 0 0 0 0 0 0 0 0 0

RRC District 8............. 0 0 0 0 0 0 0 0 0 0

RRC District 8A ........... 0 0 0 0 0 0 0 0 0 0

RRC District 9............. 0 0 0 0 0 0 0 0 0 0

RRC District 10............ 0 0 0 0 0 0 0 0 0 0

State Offshore ............ 0 0 0 0 0 0 0 0 0 0

Utah ...................... 902 750 922 893 725 75 66 73 71 71

Virginia .................... 1,572 1,813 1,948 1,851 2,261 56 81 85 101 111

West Virginia ............... 186 194 255 246 220 30 18 25 28 31

Wyoming .................. 2,446 2,448 2,738 2,781 2,328 336 378 401 573 535

Federal Offshore ............ 0 0 0 0 0 0 0 0 0 0

Miscellaneousa............. 19 28 29 41 17 1 1 1 1 1

U.S. Total.................. 19,892 19,620 21,874 20,798 18,578 1,732 1,758 1,753 1,966 1,914

a

Includes Illinois and Indiana.

Note: The above table is based on coalbed methane proved reserves and production volumes as reported to the EIA on Form EIA-23 "Annual 

Survey of Domestic Oil and Gas Reserves." It does not include EIA-estimated volumes for the non-surveyed operators. For this and other

reasons (e.g. incorrect or incomplete respondent submissions) the actual proved reserves and production of coalbed methane plays may be

higher or lower. The production estimates are offered only as an observed indicator of production trends and may differ from production

volumes listed elsewhere on the EIA web page.

Sources: U.S. Crude Oil, Natural Gas, and Natural Gas Liquids Reserves, 2005 through 2009 annual reports, DOE/EIA-0216.
a

Includes Illinois and Indiana.

Note: The above table is based on coalbed methane proved reserves and production volumes as reported to the EIA on Form EIA-23 "Annual 

Survey of Domestic Oil and Gas Reserves." It does not include EIA-estimated volumes for the non-surveyed operators. For this and other

reasons (e.g. incorrect or incomplete respondent submissions) the actual proved reserves and production of coalbed methane plays may be

higher or lower. The production estimates are offered only as an observed indicator of production trends and may differ from production

volumes listed elsewhere on the EIA web page.

Source: U.S. Energy Information Administration.

Alaska ..................... 0 0 0 0 0 0 0 0 0 0 0

Lower 48 States ............. 20,798 -14 1,563 2,486 208 24 724 0 91 1,914 18,578

Alabama ................... 1,727 0 17 316 2 0 21 0 0 105 1,342

Arkansas ................... 31 0 3 0 31 22 0 0 0 3 22

California ................... 0 0 0 0 0 0 0 0 0 0 0

Colorado ................... 8,238 0 126 566 0 0 48 0 0 498 7,348

Florida ..................... 0 0 0 0 0 0 0 0 0 0 0

Kansas .................... 301 -3 8 107 0 0 7 0 0 43 163

Kentucky ................... 0 0 0 0 0 0 0 0 0 0 0

Louisiana................... 9 0 0 0 8 0 0 0 0 1 0

North Onshore ............. 9 0 0 0 8 0 0 0 0 1 0

South Onshore............. 0 0 0 0 0 0 0 0 0 0 0

State Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Michigan ................... 0 0 0 0 0 0 0 0 0 0 0

Mississippi.................. 0 0 0 0 0 0 0 0 0 0 0

Montana ................... 75 0 0 29 0 0 3 0 0 12 37

New Mexico................. 3,991 -9 443 353 33 2 37 0 0 432 3,646

East ..................... 530 0 0 30 0 0 0 0 0 26 474

West .................... 3,461 -9 443 323 33 2 37 0 0 406 3,172

New York................... 0 0 0 0 0 0 0 0 0 0 0

North Dakota ................ 0 0 0 0 0 0 0 0 0 0 0

Ohio....................... 1 0 0 1 0 0 0 0 0 0 0

Oklahoma .................. 511 1 81 216 6 0 22 0 0 55 338

Pennsylvania ................ 102 0 29 1 17 0 34 0 0 16 131

Texas...................... 0 0 0 0 0 0 0 0 0 0 0

RRC District 1 ............. 0 0 0 0 0 0 0 0 0 0 0

RRC District 2 Onshore ...... 0 0 0 0 0 0 0 0 0 0 0

RRC District 3 Onshore ...... 0 0 0 0 0 0 0 0 0 0 0

RRC District 4 Onshore ...... 0 0 0 0 0 0 0 0 0 0 0

RRC District 5 ............. 0 0 0 0 0 0 0 0 0 0 0

RRC District 6 ............. 0 0 0 0 0 0 0 0 0 0 0

RRC District 7B ............ 0 0 0 0 0 0 0 0 0 0 0

RRC District 7C ............ 0 0 0 0 0 0 0 0 0 0 0

RRC District 8 ............. 0 0 0 0 0 0 0 0 0 0 0

RRC District 8A ............ 0 0 0 0 0 0 0 0 0 0 0

RRC District 9 ............. 0 0 0 0 0 0 0 0 0 0 0

RRC District 10 ............ 0 0 0 0 0 0 0 0 0 0 0

State Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Utah....................... 893 0 9 110 0 0 0 0 4 71 725

Virginia .................... 1,851 0 219 0 0 0 302 0 0 111 2,261

West Virginia ................ 246 0 19 38 0 0 24 0 0 31 220

Wyoming ................... 2,781 -4 609 725 111 0 226 0 87 535 2,328

Federal Offshore ............. 0 0 0 0 0 0 0 0 0 0 0

Miscellaneousa.............. 41 1 0 24 0 0 0 0 0 1 17

U.S. Total .................. 20,798 -14 1,563 2,486 208 24 724 0 91 1,914 18,578

Table 16. Coalbed Methane Proved Reserves, Reserves Changes, and Production, 2009

(Billion Cubic Feet at 14.73 psia and 60° Fahrenheit)

Changes in Reserves During 2009

 Published New Reservoir

 Proved Revision Revision New Field Discoveries Estimated Proved

 Reserves Adjustments Increases Decreases Sales Acquisitions Extensions Discoveries in Old Fields Production Reserves

State and Subdivision 12/31/08 (+,–) (+) (–) (–) (+) (+) (+) (+) (–) 12/31/09
Table 17. Natural Gas Plant Liquids Proved Reserves and Production, 2009 (excludes Lease Condensate)

(Million Barrels of 42 U.S. Gallons)

2009 2009 2009 2009

State and Subdivision Reserves Production State and Subdivision Reserves Production

Alaska....................... 299 13

Lower 48 States............... 8,258 701

Alabama ..................... 55 5

Arkansas..................... 2 0

California..................... 129 11

Coastal Region Onshore....... 10 1

Los Angeles Basin Onshore .... 6 0

San Joaquin Basin Onshore .... 113 10

State Offshore............... 0 0

Colorado ..................... 722 48

Florida....................... 0 0

Kansas ...................... 162 16

Kentucky ..................... 101 4

Louisiana .................... 231 26

North...................... 98 6

South Onshore .............. 90 15

State Offshore............... 43 5

Michigan ..................... 43 2

Mississippi ................... 4 0

Montana ..................... 12 1

New Mexico .................. 715 65

East....................... 289 32

West ...................... 426 33

North Dakota.................. 104 8

Oklahoma .................... 985 77

Pennsylvania.................. 25 1

Texas ....................... 3,432 300

RRC District 1 ............... 87 5

RRC District 2 Onshore ....... 77 11

RRC District 3 Onshore ....... 127 25

RRC District 4 Onshore ....... 231 35

RRC District 5 ............... 192 15

RRC District 6 ............... 330 26

RRC District 7B.............. 326 27

RRC District 7C ............. 412 28

RRC District 8 ............... 536 44

RRC District 8A.............. 201 18

RRC District 9 ............... 419 26

RRC District 10 .............. 494 40

State Offshore................. 0 0

Utah ........................ 116 7

West Virginia.................. 108 5

Wyoming..................... 1,010 64

Federal Offshorea.............. 302 61

Pacific (California)............ 1 0

Gulf of Mexico (Louisiana)a.... 301 61

Gulf of Mexico (Texas) ........ 0 0

Miscellaneousb................ 0 0

U.S. Total .................... 8,557 714

a

Includes Federal Offshore Alabama. b

Includes Arizona, Illinois, Indiana, Maryland, Missouri, Nebraska, Nevada, New York, Ohio, Oregon, South Dakota, Tennessee, and

Virginia.

Note: The production estimates in this table are based on data reported on Form EIA-23, “Annual Survey of Domestic Oil and Gas

Reserves,” and Form EIA-64A, “Annual Report of the Origin of Natural Gas Liquids Production.” They may differ from EIA production data for

natural gas plant liquids for 2009 contained in the Petroleum Supply Annual 2009 and the Natural Gas Annual 2009.

Source: U.S. Energy Information Administration.
Ta ble 18. Re ported Proved Nonproducing Re serves of Crude Oil, Lease Con den sate, and Wet Nat u ral Gas,

Wet Af ter Lease Sep a ra tion 2009a

Lease Nonassociated As so ci ated To tal

Crude Oil Con den sate Gas Dis solved Gas Gas

State and Sub di vi sion (Million bbls) (Million bbls) (Bcf) (Bcf) (Bcf)

Alaska .................................. 633 0 173 20 193

Lower 48 States .......................... 5,382 511 90,304 7,595 97,899

Al a bama................................. 0 0 126 0 126

Ar kan sas ................................ 0 0 5,872 0 5,872

Cal i for nia ................................ 272 0 314 146 460

Coastal Re gion On shore.................. 51 0 0 22 22

Los An geles Ba sin On shore ............... 29 0 0 12 12

San Joaquin Ba sin On shore ............... 146 0 311 90 401

State Off shore.......................... 46 0 3 22 25

Col o rado ................................ 42 34 7,732 456 8,188

Florida .................................. 2 0 0 0 0

Kan sas.................................. 3 0 128 4 132

Ken tucky ................................ 3 0 149 0 149

Lou i si ana ................................ 149 25 12,718 407 13,125

North ................................. 8 6 11,599 17 11,616

South On shore ......................... 129 13 976 249 1,225

State Off shore.......................... 12 6 143 141 284

Mich i gan ................................ 6 8 535 21 556

Mis sis sippi ............................... 117 1 255 2 257

Montana................................. 42 0 104 23 127

New Mex ico .............................. 149 13 3,376 408 3,784

East .................................... 149 12 649 403 1,052

West.................................... 0 1 2,727 5 2,732

New York ................................ 0 0 19 0 19

North Da kota ............................. 463 8 23 487 510

Ohio .................................... 5 0 67 1 68

Oklahoma ............................... 138 56 7,990 171 8,161

Penn syl va nia ............................. 0 3 2,282 0 2,282

Texas ................................... 1,455 124 28,549 2,787 31,336

RRC Dis trict 1 .......................... 26 6 719 24 743

RRC Dis trict 2 On shore .................. 14 1 617 31 648

RRC Dis trict 3 On shore .................. 26 14 685 113 798

RRC Dis trict 4 On shore .................. 1 23 2,644 19 2,663

RRC Dis trict 5 .......................... 1 0 9,039 0 9,039

RRC Dis trict 6 .......................... 12 21 5,671 19 5,690

RRC Dis trict 7B......................... 8 0 714 23 737

RRC Dis trict 7C ........................ 221 10 875 744 1,619

RRC Dis trict 8 .......................... 679 6 1,427 1,042 2,469

RRC Dis trict 8A......................... 413 6 2 374 376

RRC Dis trict 9 .......................... 25 8 3,935 233 4,168

RRC Dis trict 10 ......................... 29 27 2,162 163 2,325

State Off shore.......................... 0 2 59 2 61

Utah .................................... 235 11 1,739 371 2,110

Vir ginia.................................. 0 0 839 0 839

West Vir ginia ............................. 0 0 815 3 818

Wy o ming ................................ 144 125 12,812 27 12,839

Fed eral Off shoreb......................... 2,150 103 3,758 2,281 6039

Pa cific (Cal i for nia)....................... 12 2 2 34 36

Gulf of Mex ico (Lou i si ana)b............... 2,013 66 2,660 1,786 4,446

Gulf of Mex ico (Texas) ................... 125 35 1,096 461 1557

Mis cel la neousc........................... 7 0 102 0 102

U.S. To tal................................ 6,015 511 90,477 7,615 98,092

a

In cludes only those op er a tors who pro duced dur ing the re port year 400,000 bar rels of crude oil or 2 billion cu bic feet of wet nat u ral gas, or

more (Cat e gory I and Cat e gory II op er a tors).

b

In cludes Fed eral off shore Al a bama.

c

In cludes Ar i zona, Il li nois, In di ana, Mary land, Mis souri, Ne braska, Ne vada, Or e gon, South Da kota, and Ten nes see.

Source: Form EIA-23, "An nual Sur vey of Do mes tic Oil and Gas Re serves," 2009.