6. Property, Plant and Equipment

Assets Held for Sale: At December 31, 2013, E&P assets totaling $1,097 million, primarily consisting of the net property, plant and equipment balances as well as allocated goodwill of $76 million, for the Corporation’s assets in Thailand and the Pangkah Field, offshore Indonesia (Hess 75%) were classified as held for sale and are reported within Other current assets in the Consolidated Balance Sheet. In addition, liabilities related to these properties totaling $286 million, primarily consisting of asset retirement obligations and deferred income taxes, are reported within Accrued liabilities. In 2014, the Corporation completed the sale of its interests in Thailand and Pangkah. See Note 4, Dispositions, in the Notes to the Consolidated Financial Statements.

Capitalized Exploratory Well Costs: The following table discloses the net changes in capitalized exploratory well costs pending determination of proved reserves for the nine months ended September 30, 2014 (in millions):

Balance at January 1	$	2,045
Additions to capitalized exploratory well costs pending the determination of proved reserves		184
Reclassifications to wells, facilities and equipment based on the determination of proved reserves		(28	)
Capitalized exploratory well costs charged to expense		(236	)
Dispositions and other		(57	)
Balance at September 30, 2014	$	1,908

The preceding table excludes exploratory dry hole costs of $61 million which were incurred and subsequently expensed in 2014. Capitalized exploratory well costs charged to expense in the second quarter of 2014 included $169 million to write-off a previously capitalized exploration well in the western half of Green Canyon Block 469 in the Gulf of Mexico as further explained below.

Capitalized exploratory well costs greater than one year old after completion of drilling were $1,737 million at September 30, 2014. Approximately 48% of the capitalized well costs in excess of one year relates to Block WA-390-P, offshore Western Australia, where development planning and commercial activities, including negotiations with potential liquefaction partners, are ongoing. Successful negotiation with a third party liquefaction partner is necessary before the Corporation can negotiate a gas sales agreement and sanction development of the project. Approximately 29% relates to the Stampede Project in the Gulf of Mexico where Hess is operator and owns a 25% working interest. An application to unitize Blocks 468, 512, the western half of 469 and the eastern half of 511 was filed with the Bureau of Safety and Environmental Enforcement in the first quarter of 2014. During the second quarter of 2014, the Corporation received approval to unitize Blocks 468, 512 and the eastern half of 511. As Block 469 was not accepted in the unitized development area, the Corporation expensed the capitalized well on this block in the second quarter. See also Note 16, Subsequent Events in the Notes to the Consolidated Financial Statements. Approximately 21% relates to offshore Ghana where the Corporation has drilled seven successful exploration wells. Appraisal plans for the seven wells on the block were submitted to the Ghanaian government in June 2013 for approval. Four of the plans were approved and discussions continue with the government on the three remaining appraisal plans. In the third quarter of 2014, the Corporation completed a three well appraisal program in Ghana. Well results are being evaluated and development planning is progressing. The remaining 2% of the capitalized well costs in excess of one year relates to projects where further drilling is planned or development planning and other assessment activities are ongoing to determine the economic and operating viability of the projects.