Oil and natural gas properties (under successful efforts accounting) (Tables)

3 Months Ended

Mar. 31, 2015

Extractive Industries [Abstract]

Components of Oil and Natural Gas Properties

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