Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and equivalents	$ 13,564,149	$ 12,566,868
Investments	17,229,650	17,064,136
Production accounts receivable	1,974,569	1,661,669
Other	8,150	64,681
Total current assets	32,776,518	31,357,354
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	175,004,277	175,062,777
Pipeline and support equipment	770,520	762,440
Corporate and other	2,094,423	2,094,423
Gross property and equipment	177,869,220	177,919,640
Less accumulated depreciation, depletion, amortization and write down	168,828,622	168,754,778
Net property and equipment	9,040,598	9,164,862
OTHER ASSETS	126,144	125,796
TOTAL ASSETS	41,943,260	40,648,012
CURRENT LIABILITIES
Accounts payable	2,084,538	1,869,885
Accrued expenses	590,162	1,084,347
Total current liabilities	2,674,700	2,954,232
DEFERRED INCOME TAXES	40,700	40,700
OPERATIONAL ADVANCES	2,267,913	2,135,632
ASSET RETIREMENT OBLIGATIONS	16,876,086	16,807,486
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units Issued and outstanding - 5,549,355 Units	19,843,925	18,486,440
GENERAL PARTNER'S EQUITY	239,936	223,522
Total partners' equity	20,083,861	18,709,962
TOTAL LIABILITIES AND PARTNERS' EQUITY	$ 41,943,260	$ 40,648,012