|
Movements in net proved hydrocarbons reserves |
(mmboe) |
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
||
|
|
Italy (a) |
Rest of Europe |
North Africa |
Sub-Saharan |
Kazakhstan |
Rest of Asia |
America |
Australia |
Total |
||
|
2011 |
|
|
|
|
|
|
|
|
|
||
|
|||||||||||
|
Consolidated subsidiaries |
|
|
|
|
|
|
|
|
|
||
|
Reserves at December 31, 2010 |
724 |
601 |
2,096 |
1,133 |
1,126 |
295 |
230 |
127 |
6,332 |
||
|
of which: developed |
554 |
405 |
1,215 |
812 |
543 |
139 |
141 |
117 |
3,926 |
||
|
undeveloped |
170 |
196 |
881 |
321 |
583 |
156 |
89 |
10 |
2,406 |
||
|
Purchase of minerals in place |
2 |
|
|
|
|
|
|
|
2 |
||
|
Revisions of previous estimates |
48 |
94 |
88 |
12 |
(137) |
(26) |
10 |
17 |
106 |
||
|
Improved recovery |
|
2 |
2 |
2 |
|
|
|
|
6 |
||
|
Extensions and discoveries |
1 |
13 |
3 |
14 |
|
|
40 |
|
71 |
||
|
Production |
(68) |
(78) |
(158) |
(133) |
(39) |
(39) |
(42) |
(11) |
(568) |
||
|
Sales of minerals in place |
|
(2) |
|
(7) |
|
|
|
|
(9) |
||
|
Reserves at December 31, 2011 |
707 |
630 |
2,031 |
1,021 |
950 |
230 |
238 |
133 |
5,940 |
||
|
Equity-accounted entities |
|
|
|
|
|
|
|
|
|
||
|
Reserves at December 31, 2010 |
|
|
23 |
28 |
|
317 |
143 |
|
511 |
||
|
of which: developed |
|
|
22 |
5 |
|
43 |
26 |
|
96 |
||
|
undeveloped |
|
|
1 |
23 |
|
274 |
117 |
|
415 |
||
|
Purchase of minerals in place |
|
|
|
|
|
|
|
|
|
||
|
Revisions of previous estimates |
|
|
|
37 |
|
73 |
13 |
|
123 |
||
|
Improved recovery |
|
|
|
|
|
|
1 |
|
1 |
||
|
Extensions and discoveries |
|
|
|
19 |
|
268 |
233 |
|
520 |
||
|
Production |
|
|
(2) |
(1) |
|
(2) |
(4) |
|
(9) |
||
|
Sales of minerals in place |
|
|
|
|
|
|
|
|
|
||
|
Reserves at December 31, 2011 |
|
|
21 |
83 |
|
656 |
386 |
|
1,146 |
||
|
Reserves at December 31, 2011 |
707 |
630 |
2,052 |
1,104 |
950 |
886 |
624 |
133 |
7,086 |
||
|
Developed |
540 |
374 |
1,194 |
746 |
482 |
134 |
188 |
112 |
3,770 |
||
|
consolidated subsidiaries |
540 |
374 |
1,175 |
742 |
482 |
129 |
162 |
112 |
3,716 |
||
|
equity-accounted entities |
|
|
19 |
4 |
|
5 |
26 |
|
54 |
||
|
Undeveloped |
167 |
256 |
858 |
358 |
468 |
752 |
436 |
21 |
3,316 |
||
|
consolidated subsidiaries |
167 |
256 |
856 |
279 |
468 |
101 |
76 |
21 |
2,224 |
||
|
equity-accounted entities |
|
|
2 |
79 |
|
651 |
360 |
|
1,092 |
||
