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Note 9 - Supplemental Financial Data - Oil and Gas Producing Activities (Unaudited): Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities (Tables)

12 Months Ended

Sep. 30, 2020

Tables/Schedules

Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities

Oil in Barrels

Balance at September 30, 2018

                             3,700

Revisions of previous estimates

                               (900)

Production

                               (400)

Balance at September 30, 2019

                             2,400

Revisions of previous estimates

                               (700)

Production

                               (600)

Balance at September 30, 2019

                             1,100

Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period.

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