Methane Migration in Gas Drilling More Common in Northeast PA

According to a recent article in the Elmira Star-Gazette, drilling for shale gas in northeastern PA is more challenging than other areas of the state because of the geology in the area—a geology that lends itself to methane migration. The methane that migrates does not necessarily come from the Marcellus Shale layer itself, but is often trapped above the Marcellus in limestone and other rock layers.

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