|
(billion cubic feet) |
Italy (b) |
Rest of Europe |
North Africa |
Sub-Saharan Africa |
Kazakh- |
Rest of Asia |
Americas |
Australia and Oceania |
Total |
||||
|
|||||||||||||
|
2011 |
|
|
|
|
|
|
|
|
|
||||
|
Reserves of consolidated subsidiaries at December 31, 2010 |
2,644 |
1,401 |
6,207 |
2,127 |
1,874 |
871 |
530 |
544 |
16,198 |
||||
|
of which: developed |
2,061 |
1,103 |
3,100 |
1,550 |
1,621 |
560 |
431 |
539 |
10,965 |
||||
|
undeveloped |
583 |
298 |
3,107 |
577 |
253 |
311 |
99 |
5 |
5,233 |
||||
|
Purchase of minerals in place |
9 |
|
|
|
|
|
|
|
9 |
||||
|
Revisions of previous estimates |
80 |
199 |
436 |
(11) |
(142) |
(38) |
51 |
96 |
671 |
||||
|
Improved recovery |
|
3 |
|
|
|
|
|
|
3 |
||||
|
Extensions and discoveries |
4 |
18 |
9 |
18 |
|
|
131 |
|
180 |
||||
|
Production |
(246) |
(196) |
(462) |
(185) |
(84) |
(148) |
(122) |
(36) |
(1,479) |
||||
|
Sales of minerals in place |
|
|
|
|
|
|
|
|
|
||||
|
Reserves of consolidated subsidiaries at December 31, 2011 |
2,491 |
1,425 |
6,190 |
1,949 |
1,648 |
685 |
590 |
604 |
15,582 |
||||
|
Reserves of equity-accounted entities at December 31, 2010 |
|
|
24 |
118 |
|
1,520 |
22 |
|
1,684 |
||||
|
of which: developed |
|
|
22 |
4 |
|
214 |
6 |
|
246 |
||||
|
undeveloped |
|
|
2 |
114 |
|
1,306 |
16 |
|
1,438 |
||||
|
Purchase of minerals in place |
|
2 |
|
|
|
|
|
|
2 |
||||
|
Revisions of previous estimates |
|
|
(2) |
147 |
|
372 |
11 |
|
528 |
||||
|
Improved recovery |
|
|
|
|
|
|
|
|
|
||||
|
Extensions and discoveries |
|
|
|
74 |
|
1,150 |
1,274 |
|
2,498 |
||||
|
Production |
|
|
(2) |
(1) |
|
(9) |
|
|
(12) |
||||
|
Sales of minerals in place |
|
|
|
|
|
|
|
|
|
||||
|
Reserves of equity-accounted entities at December 31, 2011 |
|
2 |
20 |
338 |
|
3,033 |
1,307 |
|
4,700 |
||||
|
Reserves at December 31, 2011 |
2,491 |
1,427 |
6,210 |
2,287 |
1,648 |
3,718 |
1,897 |
604 |
20,282 |
||||
|
Developed |
1,977 |
995 |
3,087 |
1,441 |
1,480 |
552 |
393 |
491 |
10,416 |
||||
|
consolidated subsidiaries |
1,977 |
995 |
3,070 |
1,437 |
1,480 |
528 |
385 |
491 |
10,363 |
||||
|
equity-accounted entities |
|
|
17 |
4 |
|
24 |
8 |
|
53 |
||||
|
Undeveloped |
514 |
432 |
3,123 |
846 |
168 |
3,166 |
1,504 |
113 |
9,866 |
||||
|
consolidated subsidiaries |
514 |
430 |
3,120 |
512 |
168 |
157 |
205 |
113 |
5,219 |
||||
|
equity-accounted entities |
|
2 |
3 |
334 |
|
3,009 |
1,299 |
|
4,647 |
||||
