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Changes in total proved undeveloped reserves (Details) | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Gas (MMCF) |  |  |
Proved undeveloped reserves - Gas | 2,168 | 2,168 | 2,168
Revaluation of undeveloped reserves - Gas | 0 | 0 | 0
Conversion to proved developed reserves - Gas | 0 | 0 | 0
Oil (MBBLS) |  |  |
Proved undeveloped reserves - Oil | 68 | 0 | 68
Revaluation of undeveloped reserves - Oil | 0 | 68 | (68)
Conversion to proved developed reserves - Oil | 0 | 0 | 0

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- Definition Conversion to proved developed reserves - Gas + References No definition available. + Details
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- Definition Conversion to proved developed reserves - Oil + References No definition available. + Details
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- References No definition available. + Details
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- References No definition available. + Details
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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References No definition available. + Details
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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References No definition available. + Details
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- Definition Revaluation of undeveloped reserves - Gas + References No definition available. + Details
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- Definition Revaluation of undeveloped reserves - Oil + References No definition available. + Details
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