The Energy Information Administration (EIA) has an interesting post on rig movement between Pennsylvania and West Virginia. "West Virginia and southwest Pennsylvania form an integrated region when it comes to natural gas drilling, with rig operators often moving between the two states. Well drilling has become increasingly focused in these areas of the Appalachian Basin. *** Drilling continues to shift out of the dry region of northeast Pennsylvania, where most natural gas production in the Appalachian Basin's Marcellus Shale play has occurred. For the week ending August 16, 2013, there were 26 active rigs drilling natural gas wells in the northeast Pennsylvania dry region, compared with 43 rigs for the week ending August 17, 2012, and 83 rigs for the week ending August 19, 2011, according to data from Baker Hughes."
