All of the USGS values are available at our website U.S.Geological Survey Assessment of the Middle Devonian Marcellus Shale of the Appalachian Basin 2011.
The USGS publishes its geological reports supporting its oil and gas resource assessment on its Energy Resources Program web site as soon as they are completed, peer reviewed by scientists knowledgeable about the s
The USGS does not have any current plans to re-assess the Marcellus shale resource potential. However, if new technology is developed and deployed, apparently resulting in substantial changes in technically recoverable resources, the USGS will look at
Why does the USGS publish its oil and gas resource assessment numbers using different units for the same assessment, i.e., billion cubic feet (BCF) and trillion cubic feet (TCF)?
Our standard practice in publishing the fact sheet of results is to use billions of cubic feet (BCF) and millions of barrels of oil (MMBO) or natural gas liquids, because we use a standard format for all assessment results. Some basins have very littl
Why doesn’t the USGS just provide a single oil and gas resource assessment number for its estimates instead of a table of numbers, which may be confusing?
The USGS uses a statistically based process to calculate the likely range of its estimate. The USGS publishes a range of values that encompasses 90% of likely outcomes from its modeling process. That range extends from a 5% or greater likelihood of o
Why is the USGS resource assessment so low, when compared with the Energy Information Administration and the petroleum industry’s assessments?
This question cannot be answered clearly, because the methodologies used by these and other entities to estimate resource volumes are not publically available to compare step-by-step. The USGS does not include previously discovered and booked reserves
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