Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL INFORMATION RELATING TO OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) (Details 2)

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SUPPLEMENTAL INFORMATION RELATING TO OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) (Details 2) - bbl
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Proved Developed and Undeveloped Reserves [Roll Forward]    
Balance at the beginning 301,900 226,600
Revisions of prior estimates (99,207) 83,396
Purchases of reserves in place 536,140  
Production (4,313) (8,096)
Balance at the end 734,520 301,900