CHK » Topics » ROLL-FORWARD OF PROVED RESERVES

This excerpt taken from the CHK 8-K filed Jul 28, 2006.

ROLL-FORWARD OF PROVED RESERVES

(unaudited)

 

     Mmcfe  

Beginning balance, 12/31/05

   7,520,690  

Extensions and discoveries

   434,414  

Acquisitions

   269,239  

Divestitures

   (89 )

Revisions – performance

   351,613  

Revisions – price

   (195,541 )

Production

   (279,428 )
      

Ending balance, 6/30/06

   8,100,898  
      

Reserve replacement

   859,636  

Reserve replacement rate

   308 %

 

16


CHESAPEAKE ENERGY CORPORATION

This excerpt taken from the CHK 8-K filed May 2, 2006.

ROLL-FORWARD OF PROVED RESERVES

(unaudited)

 

     Mmcfe  

Beginning balance, 12/31/05

   7,520,690  

Extensions and discoveries

   196,769  

Acquisitions

   243,080  

Divestitures

   (67 )

Revisions – performance

   75,775  

Revisions – price

   (88,217 )

Production

   (136,752 )
      

Ending balance, 3/31/06

   7,811,278  
      

Reserve replacement

   427,340  

Reserve replacement rate

   312 %

 

13


CHESAPEAKE ENERGY CORPORATION

This excerpt taken from the CHK 8-K filed Feb 24, 2006.

ROLL-FORWARD OF PROVED RESERVES

(unaudited)

 

 

Mmcfe

 

 

 

 

 

Beginning balance, 12/31/04

 

4,901,751

 

Extensions and discoveries

 

1,005,564

 

Acquisitions

 

2,041,235

 

Divestitures

 

(486

)

Revisions – performance

 

16,729

 

Revisions – price

 

24,474

 

Production

 

(468,577

)

Ending balance, 12/31/05

 

7,520,690

 

 

 

 

 

Reserve replacement

 

3,087,516

 

Reserve replacement rate

 

659

%

 

CHESAPEAKE ENERGY CORPORATION

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