v2.4.0.6

Suspended Wells | 12 Months Ended
--- | ---
Dec. 31, 2011
Suspended Wells | Note 8—Suspended Wells The following table reflects the net changes in suspended exploratory well costs during 2011, 2010 and 2009:
|  | Millions of Dollars |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Beginning balance at January 1 |  | $ | 1,013 |  |  |  | 908 |  |  |  | 660 |
Additions pending the determination of proved reserves |  |  | 96 |  |  |  | 216 |  |  |  | 342 |
Reclassifications to proved properties |  |  | (72 | ) |  |  | (106 | ) |  |  | (39 | )
Sales of suspended well investment |  |  | — |  |  |  | (4 | ) |  |  | (21 | )
Charged to dry hole expense |  |  | — |  |  |  | (1 | ) |  |  | (34 | )
Ending balance at December 31 |  | $ | 1,037 |  |  |  | 1,013 |  |  |  | 908 |
The following table provides an aging of suspended well balances at December 31, 2011, 2010 and 2009:
|  | Millions of Dollars |
|  | 2011 |  |  | 2010 |  |  | 2009 |
Exploratory well costs capitalized for a period of one year or less |  | $ | 115 |  |  |  | 220 |  |  |  | 319 |
Exploratory well costs capitalized for a period greater than one year |  |  | 922 |  |  |  | 793 |  |  |  | 589 |
Ending balance |  | $ | 1,037 |  |  |  | 1,013 |  |  |  | 908 |
Number of projects that have exploratory well costs that have been capitalized for a period greater than one year |  |  | 40 |  |  |  | 40 |  |  |  | 34 |
The following table provides a further aging of those exploratory well costs that have been capitalized for more than one year since the completion of drilling as of December 31, 2011:
|  | Millions of Dollars |
|  |  |  |  | Suspended Since |
Project |  | Total |  |  | 2008-2010 |  |  | 2005-2007 |  |  | 2001-2004 |
Aktote—Kazakhstan(2) |  | $ | 19 |  |  |  | — |  |  |  | — |  |  |  | 19 |
Alpine Satellite—Alaska(2) |  |  | 21 |  |  |  | — |  |  |  | — |  |  |  | 21 |
Browse Basin—Australia(1) |  |  | 216 |  |  |  | 216 |  |  |  | — |  |  |  | — |
Caldita/Barossa—Australia(1) |  |  | 77 |  |  |  | — |  |  |  | 77 |  |  |  | — |
Fiord West—Alaska(2) |  |  | 16 |  |  |  | 16 |  |  |  | — |  |  |  | — |
Harrison—U.K.(2) |  |  | 15 |  |  |  | — |  |  |  | 15 |  |  |  | — |
Kairan—Kazakhstan(2) |  |  | 27 |  |  |  | — |  |  |  | 14 |  |  |  | 13 |
Kalamkas—Kazakhstan(1) |  |  | 14 |  |  |  | 5 |  |  |  | 5 |  |  |  | 4 |
Kashagan—Kazakhstan(1) |  |  | 44 |  |  |  | 19 |  |  |  | 15 |  |  |  | 10 |
Malikai—Malaysia(2) |  |  | 52 |  |  |  | — |  |  |  | 40 |  |  |  | 12 |
NPR-A—Alaska(2) |  |  | 17 |  |  |  | 17 |  |  |  | — |  |  |  | — |
Petai—Malaysia(2) |  |  | 30 |  |  |  | 19 |  |  |  | 11 |  |  |  | — |
Point Thomson—Alaska(2) |  |  | 37 |  |  |  | 37 |  |  |  | — |  |  |  | — |
Rak More—Kazakhstan(1) |  |  | 22 |  |  |  | 22 |  |  |  | — |  |  |  | — |
Saleski—Canada(1) |  |  | 14 |  |  |  | 14 |  |  |  | — |  |  |  | — |
Shenandoah—Lower 48(1) |  |  | 43 |  |  |  | 43 |  |  |  | — |  |  |  | — |
Sunrise 3—Australia(2) |  |  | 13 |  |  |  | 13 |  |  |  | — |  |  |  | — |
Surmont III and beyond—Canada(1) |  |  | 26 |  |  |  | 6 |  |  |  | 18 |  |  |  | 2 |
Su tu Nau—Vietnam(2) |  |  | 18 |  |  |  | 9 |  |  |  | 9 |  |  |  | — |
Thornbury—Canada(1) |  |  | 19 |  |  |  | 19 |  |  |  | — |  |  |  | — |
Tiber—Lower 48(1) |  |  | 40 |  |  |  | 40 |  |  |  | — |  |  |  | — |
Titan—Norway(2) |  |  | 11 |  |  |  | 11 |  |  |  | — |  |  |  | — |
Ubah—Malaysia(2) |  |  | 34 |  |  |  | 34 |  |  |  | — |  |  |  | — |
Uge—Nigeria(1) |  |  | 29 |  |  |  | 15 |  |  |  | 14 |  |  |  | — |
Sixteen projects of $10 million or less each(1)(2) |  |  | 68 |  |  |  | 34 |  |  |  | 32 |  |  |  | 2 |
Total of 40 projects |  | $ | 922 |  |  |  | 589 |  |  |  | 250 |  |  |  | 83 |
(1) Additional appraisal wells planned. (2) Appraisal drilling complete; costs being incurred to assess development.

X
- Definition The entire disclosure for parts or all of the information related to suspended well costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61939-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS19-1 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_SuspendedWellCostsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration