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Exploratory Well Costs (Notes) | 6 Months Ended
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Jun. 30, 2019
Capitalized Exploratory Well Costs [Abstract] |
Exploratory Well Costs | Exploratory Well Costs EOG's net changes in capitalized exploratory well costs for the six-month period ended June 30, 2019, are presented below (in thousands):
| Six Months Ended June 30, 2019
Balance at January 1 | $ | 4,121 |
Additions Pending the Determination of Proved Reserves | 19,664 |
Reclassifications to Proved Properties | (2,606 | )
Costs Charged to Expense | (3,801 | )
Balance at June 30 | $ | 17,378 |
At June 30, 2019, all capitalized exploratory well costs had been capitalized for periods of less than one year.

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- Definition The entire disclosure for parts or all of the information related to suspended well costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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