Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and equivalents	$ 13,524,933	$ 12,566,868
Investments	17,379,591	17,064,136
Production accounts receivable	1,284,063	1,661,669
Other	8,150	64,681
Total current assets	32,196,737	31,357,354
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	174,919,377	175,062,777
Pipeline and support equipment	786,011	762,440
Corporate and other	2,090,250	2,094,423
Gross property and equipment	177,795,638	177,919,640
Less accumulated depreciation, depletion, amortization and write down	168,786,310	168,754,778
Net property and equipment	9,009,328	9,164,862
OTHER ASSETS	126,291	125,796
TOTAL ASSETS	41,332,356	40,648,012
CURRENT LIABILITIES
Accounts payable	2,085,986	1,869,885
Accrued expenses	771,355	1,084,347
Total current liabilities	2,857,341	2,954,232
DEFERRED INCOME TAXES	40,700	40,700
OPERATIONAL ADVANCES	2,376,437	2,135,632
ASSET RETIREMENT OBLIGATIONS	16,937,886	16,807,486
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units Issued and outstanding - 5,492,967 and 5,549,355 Units, respectively	18,889,255	18,486,440
GENERAL PARTNER'S EQUITY	230,737	223,522
Total partners' equity	19,119,992	18,709,962
TOTAL LIABILITIES AND PARTNERS' EQUITY	$ 41,332,356	$ 40,648,012