Marcellus Shale

The results of all USGS oil and gas resource assessments by a USGS assessment team are subject to a scientific peer review process prior to publication; however, the volumes determined by the assessment process are not subject to approval by higher-lev
During 2010 and early 2011, the USGS examined the Devonian Marcellus Shale in the Appalachian Basin of the eastern United States using the National Oil an
The objective of the 2011 oil and gas resource assessment was to estimate the volume of undiscovered, technically recoverable oil and natural gas resources in the Marcellus shale of the Appalachian basin.  There was no other objective to this study.  T
The objective of the 2011 oil and gas resource assessment was to estimate the volume of undiscovered, technically recoverable oil and natural gas resources in the Marcellus shale of the Appalachian basin.  There was no other objective to this study.
The USGS did not assess water-borne or atmospheric emissions during its 2011 oil and gas resource assessment of the Marcellus.
The USGS shale gas resource assessments place the 2011 three Marcellus assessment units in fourth, twenty-first, and twenty-third place in a field of twenty-six U.S.
The USGS does not separate out the fractions of natural gas liquids which it assesses in any of its assessment units, including the Marcellus shale.
The USGS did not exclude any of the Marcellus shale from its assessment study.  The USGS did not restrict the resource availability because of economic, cultural, legal, or any other factor.  The USGS did recognized that geologic properties, such as or
"RESERVES" are those quantities of petroleum anticipated to be commercially recoverable by application of development projects to known accumulations from a given date forward u
In 2002 the USGS assessed an estimated undiscovered, technically recoverable mean volume of 2 trillion cubic feet of gas (TCFG) for the Marcellus shale using geologic and production data available in 2002.  In 2011, the USGS assessed an estimated undis