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6 5 - RR DONNELLEY FINANCIAL - External Home Login

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CHESAPEAKE ENERGY CORPORATION AND SUBSIDIARIES<br />

NOTES TO CONSOLIDATED <strong>FINANCIAL</strong> STATEMENTS – (Continued)<br />

The following summary sets forth our future net cash flows relating to proved natural gas and oil reserves<br />

based on the standardized measure:<br />

Years Ended December 31,<br />

2010 2009 2008<br />

($ in millions)<br />

Future cash inflows ............................................. $ 69,616 (a) $ 49,322 (b) $ 62,995 (c)<br />

Future production costs .......................................... (20,384) (16,620) (18,828)<br />

Future development costs ........................................ (11,602) (8,881) (7,378)<br />

Future income tax provisions ...................................... (6,859) (4,106) (9,813)<br />

Future net cash flows ............................................ 30,771 19,715 26,976<br />

Less effect of a 10% discount factor ................................ (17,588) (11,512) (15,143)<br />

Standardized measure of discounted future net cash flows ............. $ 13,183 $ 8,203 $ 11,833<br />

(a) Calculated using prices of $4.38 per mcf of natural gas and $79.42 per barrel of oil, before field<br />

differentials.<br />

(b) Calculated using prices of $3.87 per mcf of natural gas and $61.14 per barrel of oil, before field<br />

differentials.<br />

(c) Calculated using prices of $5.71 per mcf of natural gas and $44.61 per barrel of oil, before field<br />

differentials.<br />

The principal sources of change in the standardized measure of discounted future net cash flows are as<br />

follows:<br />

Years Ended December 31,<br />

2010 2009 2008<br />

($ in millions)<br />

Standardized measure, beginning of period (a) ......................... $ 8,203 $ 11,833 $ 14,962<br />

Sales of natural gas and oil produced, net of production costs (b) .......... (3,199) (2,307) (5,896)<br />

Net changes in prices and production costs ........................... 3,337 (7,297) (5,025)<br />

Extensions and discoveries, net of production and development costs ..... 5,580 2,374 2,752<br />

Changes in future development costs ................................ 173 1,910 1,043<br />

Development costs incurred during the period that reduced future<br />

development costs ............................................. 717 650 1,130<br />

Revisions of previous quantity estimates ............................. 199 (1,290) 1,524<br />

Purchase of reserves-in-place ...................................... 255 41 362<br />

Sales of reserves-in-place ......................................... (2,235) (377) (1,696)<br />

Accretion of discount ............................................. 945 1,560 2,057<br />

Net change in income taxes ........................................ (716) 2,521 1,843<br />

Changes in production rates and other ............................... (76) (1,415) (1,223)<br />

Standardized measure, end of period (a) .............................. $ 13,183 $ 8,203 $ 11,833<br />

(a) The impact of cash flow hedges has not been included in any of the periods presented.<br />

(b) Excluding gains (losses) on derivatives.<br />

114

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