"With the Barnett now in decline, it joins the Haynesville and Fayetteville formations also experiencing rapid production declines. Considering these formations began to see widespread drilling operations less than 10 years ago, their overall rate of field declines are happening much more quickly than expected or represented. It also appears to validate the 2009 work of such petroleum geologists as Arthur Berman who has been documenting rapid and aggressive shale gas production decline rates on a per well basis since the U.S. shale gas boom took off."
More in Bob Magyar's article: "Is the Texas Barnett a harbinger for the Pennsylvania’s Marcellus?"