Chesapeake Energy 2010 Annual Report Download - page 54

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Drilling Activity
The following table sets forth the wells we drilled or participated in during the periods indicated. In the
table, “gross” refers to the total wells in which we had a working interest and “net” refers to gross wells
multiplied by our working interest.
2010 2009 2008
Gross % Net % Gross % Net % Gross % Net %
Development:
Productive ............. 2,721 99 1,031 99 1,971 98 875 99 3,479 99 1,650 99
Dry .................. 30 1 12 1 33 2 8 1 40 1 13 1
Total ............... 2,751 100% 1,043 100% 2,004 100% 883 100% 3,519 100% 1,663 100%
Exploratory:
Productive ............. 265 95 99 93 196 97 115 96 142 90 63 90
Dry .................. 15 5 7 7 6 3 5 4 15 10 7 10
Total ............... 280 100% 106 100% 202 100% 120 100% 157 100% 70 100%
The following table shows the wells we drilled or participated in by area:
2010 2009 2008
Gross
Wells
Net
Wells
Gross
Wells
Net
Wells
Gross
Wells
Net
Wells
Mid-Continent ....................... 596 212 386 144 1,515 542
Haynesville/Bossier Shale ............. 500 202 337 163 81 42
Barnett Shale ....................... 503 287 417 339 776 600
Fayetteville Shale .................... 775 157 774 209 814 220
Permian and Delaware Basins ......... 156 84 93 42 165 95
Marcellus Shale ..................... 329 135 149 74 32 23
Eagle Ford Shale .................... 82 48 ————
Rockies/Williston Basin ............... 32 13 ————
Other .............................. 58 11 50 32 293 211
Total ............................ 3,031 1,149 2,206 1,003 3,676 1,733
At December 31, 2010, we had 221 (86 net) wells in process.
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