CONCENTRATIONS (Tables)

12 Months Ended

Dec. 31, 2014

Risks and Uncertainties [Abstract]

Customers from Whom We Derived 10% or More of Total Oil and Gas Revenue

The following table identifies customers from whom we derived 10% or more of our total oil and gas revenue during the indicated periods:

	Year Ended December 31,
	2014			2013			2012
Conoco, Inc.		(a	)		(a	)		13	%
Phillips 66 Company		31	%		35	%		18	%
Shell Trading (US) Company		32	%		33	%		41	%

(a)    Less than 10 percent.