Quarterly report pursuant to Section 13 or 15(d)

Oil and natural gas properties, net of accumulated impairment (under successful efforts accounting) - Components of Oil and Natural Gas Properties (Details)

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Oil and natural gas properties, net of accumulated impairment (under successful efforts accounting) - Components of Oil and Natural Gas Properties (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Extractive Industries [Abstract]    
Proved property $ 9,702,938 $ 9,695,367
Unproved property 1,375,940 1,375,940
Total oil and natural gas properties, at cost 11,078,878 11,071,307
Less: accumulated impairment (8,283,321) (8,283,321)
Oil and natural gas properties, net of impairment 2,795,557 2,787,986
Less: accumulated depletion (2,214,709) (2,166,643)
Total oil and gas properties, net $ 580,848 $ 621,343