Basis of Presentation

The accompanying condensed consolidated financial statements of Chesapeake Energy Corporation (“Chesapeake” or the “Company”) were prepared in accordance with accounting principles generally accepted in the United States (U.S. GAAP) and include the accounts of our direct and indirect wholly owned subsidiaries and entities in which Chesapeake has a controlling financial interest. Intercompany accounts and balances have been eliminated. These financial statements were prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with U.S. GAAP.

This Form 10-Q relates to the three and nine months ended September 30, 2017 (the “Current Quarter” and the “Current Period”, respectively) and the three and nine months ended September 30, 2016 (the “Prior Quarter” and the “Prior Period”, respectively). Chesapeake’s annual report on Form 10-K for the year ended December 31, 2016 (“2016 Form 10-K”) includes certain definitions and a summary of significant accounting policies and should be read in conjunction with this Form 10-Q. All material adjustments (consisting solely of normal recurring adjustments) which, in the opinion of management, are necessary for a fair statement of the results for the interim periods have been reflected. The results for the Current Quarter and the Current Period are not necessarily indicative of the results to be expected for the full year.

Revision of Previously Reported Condensed Consolidated Financial Statements

During the fourth quarter of 2016, we identified certain errors to the basis price differentials used in calculating the impairment of oil and natural gas properties and oil, natural gas and NGL depreciation, depletion and amortization for each of the first three interim periods in 2016. As disclosed within our 2016 Form 10-K, it was determined that these errors were not material to our previously issued 2016 interim financial statements. Accordingly, the correction of these errors was reflected in the quarterly unaudited financial data included within our 2016 Form 10-K. These revisions have been reflected in the comparative 2016 condensed consolidated financial statements presented herein. See Evaluation of Disclosure Controls and Procedures in Item 4 of this Form 10-Q. The following table reconciles the amounts as previously reported in the applicable financial statement to the corresponding revised amounts:



	Three Months Ended September 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported			Revision Adjustment			As Revised
	($ in millions except per share data)
Oil, natural gas and NGL depreciation, depletion and amortization	$	255		$	(4	)	$	251
Impairment of oil and natural gas properties	$	433		$	64		$	497
Total operating expenses	$	3,450		$	60		$	3,510
Loss from operations	$	(1,174	)	$	(60	)	$	(1,234	)
Loss before income taxes	$	(1,154	)	$	(60	)	$	(1,214	)
Net loss	$	(1,154	)	$	(60	)	$	(1,214	)
Net loss attributable to Chesapeake	$	(1,155	)	$	(60	)	$	(1,215	)
Net loss available to common stockholders	$	(1,197	)	$	(60	)	$	(1,257	)
Loss per common share basic	$	(1.54	)	$	(0.08	)	$	(1.62	)
Loss per common share diluted	$	(1.54	)	$	(0.08	)	$	(1.62	)



	Nine Months Ended September 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS	As Previously Reported			Revision Adjustment			As Revised
	($ in millions except per share data)
Impairment of oil and natural gas properties	$	2,331		$	233		$	2,564
Total operating expenses	$	9,734		$	233		$	9,967
Loss from operations	$	(3,883	)	$	(233	)	$	(4,116	)
Loss before income taxes	$	(3,825	)	$	(233	)	$	(4,058	)
Net loss	$	(3,825	)	$	(233	)	$	(4,058	)
Net loss attributable to Chesapeake	$	(3,826	)	$	(233	)	$	(4,059	)
Net loss available to common stockholders	$	(3,953	)	$	(233	)	$	(4,186	)
Loss per common share basic	$	(5.47	)	$	(0.33	)	$	(5.80	)
Loss per common share diluted	$	(5.47	)	$	(0.33	)	$	(5.80	)



	Three Months Ended September 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)	As Previously Reported			Revision Adjustment			As Revised
	($ in millions)
Net loss	$	(1,154	)	$	(60	)	$	(1,214	)
Comprehensive loss	$	(1,151	)	$	(60	)	$	(1,211	)
Comprehensive loss attributable to Chesapeake	$	(1,152	)	$	(60	)	$	(1,212	)

	Nine Months Ended September 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)	As Previously Reported			Revision Adjustment			As Revised
	($ in millions)
Net loss	$	(3,825	)	$	(233	)	$	(4,058	)
Comprehensive loss	$	(3,827	)	$	(233	)	$	(4,060	)
Comprehensive loss attributable to Chesapeake	$	(3,828	)	$	(233	)	$	(4,061	)



	Nine Months Ended September 30, 2016
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	As Previously Reported			Revision Adjustment			As Revised
	($ in millions)
Net loss	$	(3,825	)	$	(233	)	$	(4,058	)
Impairment of oil and natural gas properties	$	2,331		$	233		$	2,564