Texas

Barnet Shale
Number of Wells: 
13,740 (as of 2-25-10)
Annual Production: 
1,764 BCF
Cumulative Production: 
7 TCF
Percent of Total State Gas Production: 
26%
http://www.rrc.state.tx.us/barnettshale/index.php
Haynesville/Bossier Shale Formation
Aproximate Depth: 
Over 10,000 feet
Number of Wells: 
238 (as of 2-25-10)
Annual Production: 
0.654 BCF
http://www.rrc.state.tx.us/bossierplay/index.php
Eagle Ford Shale
Aproximate Depth: 
Over 11,000 feet
Number of Wells: 
123
Annual Production: 
12 BCF
Percent of Total State Gas Production: 
0.17%
http://www.rrc.state.tx.us/eagleford/index.php

Statistics are estimates provided by the states.

Texas State Progress: Shale Gas

At least 35 percent of all the onshore natural gas and 30 percent of the onshore oil produced in the United States comes from Texas, making us the top producing state in the country.  Much of this gas is unconventional gas.  Over 11,000 gas wells have been completed in the Barnett Shale trend, one of the nation’s most active and largest unconventional natural gas fields.  Since 2000, over 5 Tcf (trillion cubic feet) of gas has been produced from this one reservoir, and the Barnett Shale production currently contributes over 20% of total Texas natural gas production.  The remarkable success of the Barnett Shale results in large part from the use of horizontal drilling coupled with hydraulic fracturing.