Business Segment Information

The Company’s exploration and production segment is engaged in the acquisition and development of oil and natural gas properties. Revenues for the exploration and production segment are derived from the sale of crude oil and natural gas production. The Company’s midstream services business segment (“OMS”) performs produced and flowback water gathering and disposal services, fresh water services, natural gas gathering and processing and crude oil gathering and transportation and other midstream services for the Company’s crude oil and natural gas wells operated by OPNA and other third party operators. Revenues for the midstream segment are primarily derived from produced and flowback water pipeline transport, produced and flowback water disposal, fresh water sales, natural gas gathering and processing and crude oil gathering, blending, stabilization and transportation. The Company’s well services business segment (“OWS”) performs completion services for the Company’s crude oil and natural gas wells operated by OPNA. Revenues for the well services segment are derived from providing well services, product sales and equipment rentals. The revenues and expenses related to work performed by OMS and OWS for OPNA’s working interests are eliminated in consolidation, and only the revenues and expenses related to non-affiliated working interest owners are included in the Company’s Condensed Consolidated Statements of Operations. These segments represent the Company’s three operating units, each offering different products and services. The Company’s corporate activities have been allocated to the supported business segments accordingly.

Management evaluates the performance of the Company’s business segments based on operating income, which is defined as segment operating revenues less operating expenses, including depreciation, depletion and amortization (“DD&A”).

For the three months ended March 31, 2018, the Company has revised the condensed consolidated financial statements and business segment financial information to reflect the correction of errors, which are included in the Company’s exploration and production segment and had no effect on operating income. Please see Note 2 — Summary of Significant Accounting Policies for more information related to the revision.

The following table summarizes financial information for the Company’s three business segments for the periods presented:



	Exploration and Production			Midstream Services			Well Services			Eliminations			Consolidated
	(In thousands)
Three months ended March 31, 2019:
Revenues from non-affiliates	$	517,253		$	48,021		$	10,458		$	—		$	575,732
Inter-segment revenues	—			58,561			22,173			(80,734		)	—
Total revenues	517,253			106,582			32,631			(80,734		)	575,732
Operating income	1,924			49,806			815			(2,101		)	50,444
Other income (expense)	(158,382		)	(3,748		)	5			—			(162,125		)
Income (loss) before income taxes including non-controlling interests	$	(156,458	)	$	46,058		$	820		$	(2,101	)	$	(111,681	)
General and administrative	$	27,527		$	8,861		$	7,461		$	(9,390	)	$	34,459
Equity-based compensation	8,580			465			561			(593		)	9,013

Three months ended March 31, 2018:
Revenues from non-affiliates	$	434,304		$	27,922		$	11,586		$	—		$	473,812
Inter-segment revenues	—			36,640			33,302			(69,942		)	—
Total revenues	434,304			64,562			44,888			(69,942		)	473,812
Operating income	79,962			32,237			8,148			(7,362		)	112,985
Other expense	(108,146		)	(258		)	(41		)	—			(108,445		)
Income (loss) before income taxes including non-controlling interests	$	(28,184	)	$	31,979		$	8,107		$	(7,362	)	$	4,540
General and administrative	$	23,478		$	6,414		$	5,891		$	(7,843	)	$	27,940
Equity-based compensation	6,454			370			385			(455		)	6,754

At March 31, 2019:
Property, plant and equipment, net	$	6,292,206		$	949,100		$	34,150		$	(218,714	)	$	7,056,742
Total assets⁽¹⁾	6,795,467			1,915,729			(96,226		)	(968,624		)	7,646,346
At December 31, 2018:
Property, plant and equipment, net	$	6,311,566		$	893,285		$	38,871		$	(216,613	)	$	7,027,109
Total assets⁽¹⁾	6,838,987			920,619			48,150			(181,614		)	7,626,142

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(1)	Intercompany receivables (payables) for all segments were reclassified to capital contributions from (distributions to) parent and not included in total assets.