The Marcellus gas reserve is able to remain profitable even at today's low, low gas prices, because production from its gas wells is so large. And sometimes it is record setting.
Consol reports that a well it drilled in Westmoreland county, Pennsylvania set an all-time company record for peak 24-hour production. The well produced 17,900,000 cubic feet of gas or 17,900 mcf. http://triblive.com/business/2202097-74/consol-company-drilling-friday-pad-production-rate-record-shale-westmoreland.
Consol last week also made another noteworthy announcement. It used coal mine water to frack a well or specifically 10% of a well's water needs was met by coal mine water.
Using coal mine water to frack wells is a win-win for the environment by reducing withdrawals of freshwater and by beneficially re-using coal mine water.