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Oil and natural gas properties (under successful efforts accounting)
3 Months Ended
Mar. 31, 2015
Extractive Industries [Abstract]  
Oil and natural gas properties
Oil and natural gas properties (under successful efforts accounting)

Oil and natural gas properties are comprised of the following:
 
 
March 31,
2015
 
December 31, 2014
Oil and natural gas properties
$
3,767,267

 
$
2,838,573

Less: accumulated depletion
(1,780,232
)
 
(1,942,380
)
Oil and natural gas properties, net
$
1,987,035

 
$
896,193


 
Depletion, depreciation, accretion, and amortization expense for the three months ended March 31, 2015 and 2014 was $75,199 and $78,031, respectively.

(* See footnote 2 regarding planned business combination)