Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and equivalents	$ 12,566,868	$ 11,883,725
Investments	17,064,136	13,207,778
Production accounts receivable	1,661,669	1,189,524
Other	64,681	60,725
Total current assets	31,357,354	26,341,752
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	175,062,777	179,141,990
Pipeline and support equipment	762,440	682,135
Corporate and other	2,094,423	2,127,423
Gross property and equipment	177,919,640	181,951,548
Less accumulated depreciation, depletion, amortization and write down	168,754,778	172,431,241
Net property and equipment	9,164,862	9,520,307
OTHER ASSETS	125,796	136,290
TOTAL ASSETS	40,648,012	35,998,349
CURRENT LIABILITIES
Accounts payable	1,869,885	1,958,042
Accrued expenses	1,084,347	1,624,205
Total current liabilities	2,954,232	3,582,247
DEFERRED INCOME TAXES	40,700	37,700
OPERATIONAL ADVANCES	2,135,632	1,513,924
ASSET RETIREMENT OBLIGATIONS	16,807,486	16,591,270
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units issued and outstanding - 5,549,355 and 5,587,616 Units, respectively	18,486,440	14,103,844
GENERAL PARTNER'S EQUITY	223,522	169,364
Total partners' equity	18,709,962	14,273,208
TOTAL LIABILITIES AND PARTNERS' EQUITY	$ 40,648,012	$ 35,998,349