The tables present changes in the reserves of (i) Shell subsidiaries without deduction of the reserves attributable to non-controlling interest holders in our subsidiaries and (ii) the Shell share of equity-accounted investments. Changes in proven minable oil sands reserves are reported separately for 2007–2008. As a result of SEC rule changes, these proven minable oil sands reserves have been converted to synthetic crude oil proved reserves and from 2009 onwards these are included in the proved oil and gas reserves.
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PROVED CRUDE OIL AND NATURAL GAS LIQUIDS, SYNTHETIC CRUDE OIL AND BITUMEN RESERVES CHANGES FOR SHELL SUBSIDIARIES AND EQUITY-ACCOUNTED INVESTMENTS [A][C] (AT DECEMBER 31) |
MILLION BARRELS | ||||
|---|---|---|---|---|---|
|
|
2011 |
2010 |
2009 |
2008 |
2007 |
|
Revisions and reclassifications |
190 |
856 |
1,205[B] |
242 |
164 |
|
Improved recovery |
34 |
66 |
42 |
54 |
59 |
|
Extensions and discoveries |
326 |
161 |
617 |
51 |
225 |
|
Purchases of minerals in place |
– |
59 |
– |
4 |
– |
|
Sales of minerals in place |
(37) |
(57) |
(1) |
(65) |
(206) |
|
Total additions including |
513 |
1,085 |
1,863 |
286 |
242 |
|
Production |
(611) |
(626) |
(616) |
(619) |
(663) |
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PROVED NATURAL GAS RESERVES CHANGES FOR SHELL SUBSIDIARIES AND EQUITY-ACCOUNTED INVESTMENTS [A][C][D] (AT DECEMBER 31) |
THOUSAND MILLION SCF | ||||
|---|---|---|---|---|---|
|
|
2011 |
2010 |
2009 |
2008 |
2007 |
|
Revisions and reclassifications |
899 |
829 |
4,688 |
4,184 |
1,388 |
|
Improved recovery |
3 |
42 |
1 |
– |
1 |
|
Extensions and discoveries |
3,504 |
1,288 |
4,326 |
968 |
3,636 |
|
Purchases of minerals in place |
– |
237 |
16 |
448 |
1 |
|
Sales of minerals in place |
(394) |
(743) |
– |
(19) |
(5,275) |
|
Total additions including |
4,012 |
1,653 |
9,031 |
5,581 |
(249) |
|
Production |
(3,485) |
(3,573) |
(3,315) |
(3,137) |
(2,998) |
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PROVEN MINABLE OIL SANDS RESERVES CHANGES (AT DECEMBER 31) |
MILLION BARRELS | ||||
|---|---|---|---|---|---|
|
|
|
|
|
2008 |
2007 |
|
Revisions and reclassifications |
|
|
|
(85) |
6 |
|
Extensions and discoveries |
|
|
|
– |
– |
|
Total additions including year-end price effects |
|
|
(85) |
6 | |
|
Production |
|
|
|
(29) |
(29) |
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TOTAL PROVED OIL AND GAS RESERVES CHANGES [A][C][E][F] (AT DECEMBER 31) |
MILLION BOE | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
2011 |
2010 |
2009 |
2008 |
2007 | ||||||||||||
| |||||||||||||||||
|
Revisions and reclassifications |
345 |
999 |
2,013[B] |
878 |
409 | ||||||||||||
|
Improved recovery |
35 |
73 |
42 |
54 |
59 | ||||||||||||
|
Extensions and discoveries |
930 |
383 |
1,363 |
219 |
853 | ||||||||||||
|
Purchases of minerals in place |
– |
100 |
3 |
81 |
– | ||||||||||||
|
Sales of minerals in place |
(105) |
(185) |
(1) |
(68) |
(1,115) | ||||||||||||
|
Total additions including |
1,205 |
1,370 |
3,420 |
1,164 |
206 | ||||||||||||
|
Year-average/end price effects |
(235) |
(198) |
260 |
19 |
(183) | ||||||||||||
|
Total additions excluding |
1,440 |
1,568 |
3,160 |
1,145 |
389 | ||||||||||||
|
Total additions excluding acquisitions |
1,545 |
1,753 |
3,161 |
1,213 |
1,504 | ||||||||||||
|
Production |
(1,212) |
(1,242) |
(1,187) |
(1,189) |
(1,210) | ||||||||||||
