Oil and Gas Reserves Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Changes in Net Quantities of Crude Oil and Natural Gas Reserves For Continuing Operations

Set forth below is a summary of the changes in Comstock's net quantities of oil and natural gas reserves for its continuing operations for each of the three years in the period ended December 31, 2014:

	2012						2013						2014
	Oil (MBbls)			Natural Gas (MMcf)			Oil (MBbls)			Natural Gas (MMcf)			Oil (MBbls)			Natural Gas (MMcf)
Proved Reserves:
Beginning of year		13,234			1,080,644			18,899			437,445			21,976			452,653
Revisions of previous estimates		327			(529,272	)		28			23,321			(2,182	)		3,998
Extensions and discoveries		11,953			21,525			5,363			47,581			5,373			78,383
Sales of minerals in place		(4,823	)		(53,690	)		—			—			—			—
Production		(1,792	)		(81,762	)		(2,314	)		(55,694	)		(4,313	)		(39,768	)
End of year		18,899			437,445			21,976			452,653			20,854			495,266
Proved Developed Reserves:
Beginning of year		6,499			546,627			8,389			362,426			13,914			344,278
End of year		8,389			362,426			13,914			344,278			16,247			324,597

Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves

The following table sets forth the standardized measure of discounted future net cash flows relating to proved reserves at December 31, 2013 and 2014:

	2013			2014
	(In thousands)
Cash Flows Relating to Proved Reserves:
Future Cash Flows	$	3,817,982		$	3,891,953
Future Costs:
Production		(1,307,923	)		(1,260,580	)
Development and Abandonment		(649,758	)		(571,200	)
Future Income Taxes		(451,708	)		(192,600	)
Future Net Cash Flows		1,408,593			1,867,573
10% Discount Factor		(601,376	)		(776,913	)
Standardized Measure of Discounted Future Net Cash Flows	$	807,217		$	1,090,660

Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves

The following table sets forth the changes in the standardized measure of discounted future net cash flows relating to proved reserves for the years ended December 31, 2012, 2013 and 2014:

	2012			2013			2014
	(In thousands)
Standardized Measure, Beginning of Year	$	887,798		$	641,325		$	807,217
Net change in sales price, net of production costs		(217,925	)		43,117			5,911
Development costs incurred during the year which were previously estimated		179,549			187,643			344,590
Revisions of quantity estimates		(886,531	)		48,411			(40,993	)
Accretion of discount		117,381			81,434			105,400
Changes in future development and abandonment costs		628,088			(157,207	)		(10,909	)
Changes in timing and other		27,077			80,348			(19,028	)
Extensions and discoveries		337,223			291,582			163,559
Sales of minerals in place		(236,925	)		—			—
Sales, net of production costs		(307,407	)		(335,677	)		(458,254	)
Net changes in income taxes		112,997			(73,759	)		193,167
Standardized Measure, End of Year	$	641,325		$	807,217		$	1,090,660

- Definition

Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period.

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- Definition

Tabular disclosure of the future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchase under long-term agreements in which the enterprise participates in the operation of the properties on which the oil and gas is located or otherwise serves as the producer. This information is presented in aggregate and for each geographic area for which reserve quantities are disclosed.

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