Gas migration is a real issue and problem.
If you want to learn more, please read an important, good piece of journalism by Laura Legere of the Scranton Times Tribune in the Sunday July 10th paper. See http://thetimes-tribune.com/news/stray-gas-plagues-nepa-marcellus-wells-1.1173187.
This article has leading experts quoted on the record; the data in it seem solid. I would love to hear others reaction to it. I find it to be a real contribution to dealing with a real issue.
There has been focus on non-issues such as the false claims that drilling has poisoned water with radiation or drilling fluids are returning from depth and contaminating water wells. False. Wrong.
But gas migration caused by drilling has contaminated some water wells. This article improves public understanding of the gas migration issue. Please read it.