How Much Natural Gas Does the Marcellus Really Hold?

The question of how much recoverable gas there is in the Marcellus will likely be a topic of debate for some years. In 2009, Penn State geosciences professor Dr. Terry Engelder estimated there’s around 489 trillion cubic feet of gas—the largest amount of recoverable gas of any shale play in the U.S. But in January of this year, the U.S. Energy Information Administration (EIA), the authoritative voice of the government for such data, estimated that the Marcellus has around 141 trillion cubic feet of recoverable gas total.

Who’s right? We have two new reports presented at a research conference on Monday at Penn State University which confirm Dr. Engelder’s original estimate:

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