From this table you can see that there are 129,000 producing wells in Texas, and you can also read off their production data.
okay, so texas is pumping 7.3 barrels per day from each of 129,000 wells.

to give us an idea of the scale of this, there are reports that the saudis are injecting 7 million barrels of water a day into ghawar.

another report says they're injecting 500,000 barrels of sea water a day into Haradh to get 300,000 barrels per day of oil back out.

are those figures anywhere close to the truth, or does anyone know?