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Oil and Natural Gas Properties (Tables) | 12 Months Ended
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Sep. 30, 2021
Extractive Industries [Abstract] |
Schedule of Oil and Gas Properties | Oil and natural gas properties are summarized below:
| Year Ended September 30,
| 2021 |  | 2020
| (In thousands)
Proved | $ | 402,165 |  |  | $ | 326,420 |
Unproved | 20,557 |  |  | 32,084 |
Work-in-progress | 11,411 |  |  | 15,398 |
| 434,133 |  |  | 373,902 |
Accumulated depletion and amortization | (88,336) |  |  | (63,176) |
Total oil and natural gas properties, net | $ | 345,797 |  |  | $ | 310,726 |

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