Supplementary Information On Oil, NGL And Natural Gas Reserves (Summary of Proved Undeveloped Reserves) (Details) |
12 Months Ended |
---|---|
Sep. 30, 2016
Mcfe
| |
Extractive Industries [Abstract] | |
Beginning proved undeveloped reserves | 71,917,599 |
Proved undeveloped reserves transferred to proved developed | (1,806,525) |
Revisions | (44,108,114) |
Extensions and discoveries | 16,631,699 |
Ending proved undeveloped reserves | 42,634,659 |