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Oil and Natural Gas Property Transactions (Tables) | 9 Months Ended
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Sep. 30, 2018
Property, Plant and Equipment [Abstract] |
VPP Transactions | As of September 30, 2018, we had the following VPP outstanding:
|  |  |  |  |  |  |  | Volume Sold
VPP # |  | Date of VPP |  | Location |  | Proceeds |  | Oil |  | Natural Gas |  | NGL |  | Total
|  |  |  |  |  | ($ in millions) |  | (mmbbl) |  | (bcf) |  | (mmbbl) |  | (bcfe)
9 |  | May 2011 |  | Mid-Continent |  | $ | 853 |  |  | 1.7 |  |  | 138 |  |  | 4.8 |  |  | 177 |
VPP Volumes Remaining to Be Delivered | The volumes remaining to be delivered on behalf of our VPP buyers as of September 30, 2018 were as follows:
|  |  |  | Volume Remaining as of September 30, 2018
VPP # |  | Term Remaining |  | Oil |  | Natural Gas |  | NGL |  | Total
|  | (in months) |  | (mmbbl) |  | (bcf) |  | (mmbbl) |  | (bcfe)
9 |  | 29 |  | 0.3 |  |  | 25.8 |  |  | 0.7 |  |  | 31.4 |

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