| Operating revenues | — | — | — |
| Oil | 2,953a | 2,667a | 3,016a |
| Natural gas | 1,693a | 2,292a | 5,469a |
| NGL | 738a | 644a | 964a |
| Gain (loss) on derivative instruments | -3a | 230a | -463a |
| Other | 77a | 81a | 65a |
| Operating expenses | — | — | — |
| Direct operations | -658a | -562a | -460a |
| Gathering, processing and transportation | -976a | -975a | -955a |
| Taxes other than income | -271a | -283a | -366a |
| Exploration | -25a | -20a | -29a |
| Depreciation, depletion and amortization | -1,840a | -1,641a | -1,635a |
| General and administrative | -302a | -291a | -396a |
| Gain (loss) on sale of assets | 3a | 12a | -1a |
| Income from operations | 1,389a | 2,154a | 5,209a |
| Interest expense | -106a | -73a | -80a |
| Interest income | -62a | -47a | -10a |
| Gain on debt extinguishment | | | -28a |
| Other income | | | -2a |
| Income before income taxes | 1,345a | 2,128a | 5,169a |
| Income tax expense | -224a | -503a | -1,104a |
| Net income | 1,121a | 1,625a | 4,065a |