| |
Historical Gross Proved Reserves1
| |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
| Crude Oil and Liquids (mmbbls) |
|
| Opening Balance |
167.8 |
167.9 |
225.9 |
300.3 |
416.5 |
557.1 |
631.8 |
737.6 |
716.9 |
579.2 |
| Discoveries, additions, extensions |
15.4 |
33.8 |
68.7 |
83.3 |
62.0 |
72.5 |
143.9 |
90.2 |
53.3 |
74.0 |
| Dispositions and acquisitions |
0.9 |
35.6 |
29.0 |
67.3 |
111.3 |
57.2 |
36.7 |
1.5 |
(139.0) |
29.7 |
| Net revisions and transfers |
11.2 |
24.3 |
23.2 |
18.2 |
24.1 |
33.5 |
15.8 |
(13.9) |
26.3 |
17.3 |
| Production |
(27.4) |
(35.7) |
(46.5) |
(52.6) |
(56.8) |
(88.5) |
(90.6) |
(98.5) |
(78.3) |
(82.5) |
| Closing balance |
167.9 |
225.9 |
300.3 |
416.5 |
557.1 |
631.8 |
737.6 |
716.9 |
579.2 |
617.7 |
| Natural Gas (bcf) |
|
| Opening Balance |
1,852.1 |
1,901.8 |
2,301.7 |
2,663.5 |
2,834.4 |
3,221.0 |
3,272.3 |
4,496.5 |
4,607.3 |
4,695.5 |
| Discoveries, additions, extensions |
195.3 |
263.9 |
407.6 |
396.0 |
301.0 |
472.3 |
1,045.8 |
632.8 |
459.5 |
1,251.8 |
| Dispositions and acquisitions |
9.5 |
34.2 |
289.6 |
(51.7) |
368.6 |
(53.9) |
537.4 |
3.2 |
107.2 |
(50.3) |
| Net revisions and transfers |
82.0 |
338.7 |
(95.2) |
100.2 |
47.4 |
(5.0) |
10.0 |
(146.0) |
(80.1) |
(212.1) |
| Production |
(237.1) |
(236.9) |
(240.2) |
(273.6) |
(330.4) |
(362.1) |
(369.0) |
(379.2) |
(398.4) |
(461.7) |
| Closing balance |
1,901.8 |
2,301.7 |
2,663.5 |
2,834.4 |
3,221.0 |
3,272.3 |
4,496.5 |
4,607.3 |
4,695.5 |
5,223.2 |
| BOE2 (mmboe) |
|
| Opening Balance |
476.5 |
485.0 |
609.5 |
744.2 |
888.8 |
1,094.0 |
1,177.2 |
1,487.0 |
1,484.7 |
1,361.9 |
| Discoveries, additions, extensions |
47.9 |
77.7 |
136.6 |
149.2 |
112.0 |
151.1 |
318.2 |
195.7 |
129.8 |
282.6 |
| Dispositions and acquisitions |
2.5 |
41.3 |
77.3 |
58.7 |
172.8 |
48.1 |
126.2 |
2.1 |
(121.1) |
21.4 |
| Net revisions and transfers |
25.0 |
80.7 |
7.4 |
34.9 |
32.2 |
32.8 |
17.5 |
(38.4) |
13.2 |
(18.2) |
| Production |
(66.9) |
(75.2) |
(86.6) |
(98.2) |
(111.8) |
(148.8) |
(152.1) |
(161.7) |
(144.7) |
(159.5) |
| Closing balance (gross) |
485.0 |
609.5 |
744.2 |
888.8 |
1,094.0 |
1,177.2 |
1,487.0 |
1,484.7 |
1,361.9 |
1,488.3 |
Probable Reserves1
| |
North
America |
North
Sea |
Southeast
Asia |
Algeria |
Trinidad |
Total |
| Crude Oil and Liquids (mmbbls) |
|
| Probable reserves at December 31, 2003 |
86.8 |
172.3 |
63.3 |
40.2 |
19.3 |
381.9 |
| Discoveries, additions, and extensions |
14.3 |
33.5 |
(18.8) |
6.2 |
- |
35.2 |
| Dispositions and acquisitions |
(0.3) |
22.1 |
1.0 |
- |
- |
22.8 |
| Net revisions and transfers |
(25.2) |
(26.3) |
13.5 |
(3.0) |
(15.6) |
(56.6) |
Probable reserves
at December 31, 2004 |
75.6 |
201.6 |
59.0 |
43.4 |
3.7 |
383.3 |
| Natural Gas (bcf) |
|
| Probable reserves at December 31, 2003 |
1,359.6 |
134.6 |
1,320.2 |
- |
131.9 |
2,946.3 |
| Discoveries, additions, and extensions |
478.1 |
(4.0) |
(780.8) |
- |
|
(306.7) |
| Dispositions and acquisitions |
(17.2) |
1.2 |
(67.5) |
- |
|
(83.5) |
| Net revisions and transfers |
(497.5) |
(54.5) |
673.8 |
- |
(54.3) |
67.5 |
Probable reserves
at December 31, 2004 |
1,323.0 |
77.3 |
1,145.7 |
- |
77.6 |
2,623.6 |
| BOE2 (mmboe) |
|
| Probable reserves at December 31, 2003 |
313.4 |
194.7 |
283.4 |
40.2 |
41.3 |
873.0 |
| Discoveries, additions, and extensions |
94.0 |
32.8 |
(148.9) |
6.2 |
- |
(15.9) |
| Dispositions and acquisitions |
(3.2) |
22.3 |
(10.3) |
- |
- |
8.8 |
| Net revisions and transfers |
(108.1) |
(35.3) |
(125.7) |
(3.0) |
(24.7) |
(45.4) |
Probable reserves
at December 31, 2004 |
296.1 |
214.5 |
249.9 |
43.4 |
16.6 |
820.5 |
|
|
|
|
