Colorado oil and gas production -- despite the recession and new state drilling rules -- rose about 4 percent in 2009, according to Colorado Oil and Gas Conservation Commission estimates.
Natural-gas production rose by 4.4 percent to 1.6 trillion cubic feet, and oil production was up 1.6 percent to 28.9 million barrels.
"This increase in production is the result of the large number of producing wells in the state -- now 40,000 -- and the fact new wells were able to replace declining wells," said David Neslin, the commission's director.
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