Note 10 - Supplemental Financial Data - Oil and Gas Producing Activities (Unaudited): Summary of Changes Present Value of Estimated Future Net Revenue (Tables)

12 Months Ended

Sep. 30, 2022

Tables/Schedules

Summary of Changes Present Value of Estimated Future Net Revenue

	Year ended September 30
	2022	2021
Present value of estimated future net revenue, beginning of year	$ 33,000	$ 23,000
Sales, net of production costs	(33,000)	(41,000)
Net change in prices and cost of future production	24,000	18,000
Revisions of quantity estimates	42,000	27,000
Accretion of discount	4,000	3,000
Change in production rates and other	(2,000)	3,000
Present value of estimated future net revenue, end of year	$ 68,000	$ 33,000