CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and equivalents	$ 21,340,485	$ 19,661,106
Accounts and notes receivable:
Production	3,964,309	4,435,457
Employees (including notes receivable)	138,744	242,240
Joint venture partners	39,202	36,416
Other	276,542	370,260
Total current assets	25,759,282	24,745,479
PROPERTY AND EQUIPMENT
Proved properties (successful efforts accounting method)	173,866,203	173,134,659
Pipeline and support equipment	582,593	573,775
Corporate and other	2,020,760	2,009,485
Gross property and equipment	176,469,556	175,717,919
Less accumulated depreciation, depletion, amortization and write down	135,153,157	131,922,795
Net property and equipment	41,316,399	43,795,124
OTHER ASSETS
Employees' accounts and notes receivable	368,903	409,230
Other	77,546	77,546
Total other assets	446,449	486,776
Total assets	67,522,130	69,027,379
CURRENT LIABILITIES
Accounts payable	1,915,225	2,772,561
Deferred revenue	1,000,000	1,000,000
Accrued expenses	481,592	886,590
Total current liabilities	3,396,817	4,659,151
DEFERRED INCOME TAXES	267,000	284,000
ASSET RETIREMENT OBLIGATIONS	5,672,340	5,498,740
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNERS' EQUITY, SUBJECT TO REPURCHASE RIGHT
Authorized - 8,000,000 Units Issued and outstanding - 5,616,422 and 5,618,867 Units, respectively	57,499,046	57,894,142
GENERAL PARTNER'S EQUITY	686,927	691,346
Total partners' equity	58,185,973	58,585,488
Total liabilities and partners equity	$ 67,522,130	$ 69,027,379