Officials with the survey, based at the University of Kansas, report the 43.7 million barrels of oil produced last year were the most since 1995. The oil had a value of $3.7 billion.
The survey also reported that Kansas natural gas production declined from 312 billion cubic feet in 2011 to slightly less than 300 billion cubic feet last year, a drop of 4 percent. The value of the gas declined 34 percent last year to about $790 million.
Ellis County was the state’s largest oil producer with 3.6 million barrels in 2012. Stevens County produced the most natural gas, with 40 billion cubic feet.