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Energy Glossary
Crude Oil Proved Reserves, Reserves Changes, and Production
(Million Barrels)
Data Series:
Proved Reserves as of 12/31
Adjustments (+,-)
Revision Increases (+)
Revision Decreases (-)
Sales (-)
Acquisitions (+)
Extensions (+)
New Field Discoveries (+)
New Reservoir Discoveries in Old Fields (+)
Estimated Production (-)
Period:
Annual
Download Series History
Definitions, Sources & Notes
Show Data By:
Data Series
Area
2001
2002
2003
2004
2005
2006
View
History
U.S. Total
22,446
22,677
21,891
21,371
21,757
20,972
1899-2006
Lower 48 States
17,595
17,999
17,445
17,044
17,586
17,093
1977-2006
Federal Offshore
4,835
5,009
5,120
4,691
4,483
4,096
1980-2006
Pacific (California)
547
565
566
547
441
441
1977-2006
Gulf of Mexico (Louisiana)
3,877
4,088
4,251
3,919
3,852
3,500
1981-2006
Gulf of Mexico (Texas)
411
356
303
225
190
155
1977-2006
Alaska
4,851
4,678
4,446
4,327
4,171
3,879
1977-2006
Alabama
42
51
52
53
55
45
1977-2006
Arkansas
43
49
50
51
40
37
1977-2006
California
3,627
3,633
3,452
3,376
3,435
3,389
1977-2006
Coastal Region Onshore
385
404
395
380
374
375
1977-2006
Los Angeles Basin Onshore
297
330
319
286
300
364
1977-2006
San Joaquin Basin Onshore
2,766
2,702
2,565
2,523
2,556
2,448
1977-2006
State Offshore
179
197
173
187
205
202
1977-2006
Colorado
196
214
217
225
250
274
1977-2006
Florida
75
73
68
65
59
38
1977-2006
Illinois
92
107
125
92
95
89
1977-2006
Indiana
12
15
19
11
16
12
1977-2006
Kansas
216
237
243
245
281
263
1977-2006
Kentucky
17
27
25
27
23
25
1977-2006
Louisiana
564
501
452
427
432
428
1981-2006
North
87
75
66
58
68
68
1977-2006
South Onshore
341
335
314
304
299
312
1977-2006
State Offshore
136
91
72
65
65
48
1981-2006
Michigan
46
61
75
53
62
63
1977-2006
Mississippi
167
179
169
178
189
186
1977-2006
Montana
260
288
315
364
427
419
1977-2006
Nebraska
15
18
16
15
16
14
1977-2006
New Mexico
715
710
677
669
690
705
1977-2006
East
703
699
668
662
682
696
1977-2006
West
12
11
9
7
8
9
1977-2006
North Dakota
328
342
353
389
418
412
1977-2006
Ohio
46
67
66
49
46
49
1977-2006
Oklahoma
556
598
588
570
630
569
1977-2006
Pennsylvania
10
12
13
12
14
20
1977-2006
Texas
4,944
5,015
4,583
4,613
4,919
4,871
1977-2006
RRC District 1
46
50
59
58
65
76
1977-2006
RRC District 2 Onshore
48
54
51
56
62
65
1977-2006
RRC District 3 Onshore
195
218
190
185
179
180
1977-2006
RRC District 4 Onshore
32
28
30
27
40
30
1977-2006
RRC District 5
29
24
20
23
24
24
1977-2006
RRC District 6
200
198
189
187
168
157
1977-2006
RRC District 7B
91
82
68
73
80
89
1977-2006
RRC Distict 7C
188
177
205
206
245
288
1977-2006
RRC District 8
1,880
1,913
1,513
1,552
1,731
1,717
1977-2006
RRC District 8A
2,070
2,093
2,089
2,090
2,164
2,093
1977-2006
RRC District 9
104
113
114
102
103
96
1977-2006
RRC District 10
55
59
48
45
53
53
1977-2006
State Offshore
6
6
7
9
5
3
1977-2006
Utah
271
241
221
215
256
334
1977-2006
West Virginia
8
13
13
11
21
23
1977-2006
Wyoming
489
524
517
628
704
706
1977-2006
Miscellaneous
21
15
16
15
25
26
1977-2006
Last Updated 05/27/2008
-
= No Data Reported;
--
= Not Applicable;
NA
= Not Available;
W
= Withheld to avoid disclosure of individual company data.
Notes:
Miscellaneous includes Arizona, Missouri, Nevada, New York, South Dakota, Tennessee, and Virginia. The production estimates in this table are based on data reported on Form EIA-23, "Annual Survey of Domestic Oil and Gas Reserves." They many differ from the official Energy Information Administration production data for crude oil contained in the "Petroleum Supply Annual." See Definitions, Sources, and Notes link above for more information on this table.
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