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USGS’ first assessment of shale gas resources in the Utica Shale: 38 trillion cubic feet

The Utica Shale contains about 38 trillion cubic feet (TCF) of undiscovered, technically recoverable natural gas (at the mean estimate) according to the first assessment of this continuous (unconventional) natural gas accumulation by the US Geological Survey (USGS). The Utica Shale has a mean of 940 million barrels of unconventional oil resources and a mean of 208 million barrels of unconventional natural gas liquids.

The Utica Shale lies beneath the Marcellus Shale, and both are part of the Appalachian Basin, which is the longest-producing petroleum province in the United States. The Marcellus Shale, at 84 TCF of natural gas, is the largest unconventional gas basin USGS has assessed. This is followed closely by the Greater Green River Basin in southwestern Wyoming, which has 84 TCF of undiscovered natural gas, of which 82 TCF is continuous (tight gas).

The Utica Shale assessment covered areas in Maryland, New York, Ohio, Pennsylvania, Virginia, and West Virginia.

Location of the oil and gas assessment units (AU) for the Utica Shale in the Appalachian Basin. Click to enlarge.

Some shale rock formations, such as the Utica and Marcellus, can be source rocks— formations from which hydrocarbons, such as oil and gas, originate. Conventional oil and gas resources gradually migrate away from the source rock into other formations and traps, whereas continuous resources, such as shale oil and shale gas, remain trapped within the original source rock.

These new estimates are for technically recoverable oil and gas resources, which are those quantities of oil and gas producible using currently available technology and industry practices, regardless of economic or accessibility considerations.

This USGS assessment is an estimate of continuous oil, gas, and natural gas liquid accumulations in the Upper Ordovician Utica Shale of the Appalachian Basin. The estimate of undiscovered oil ranges from 590 million barrels to 1.39 billion barrels (95% to 5% probability, respectively), natural gas ranges from 21 to 61 TCF (95% to 5% probability, respectively), and the estimate of natural gas liquids ranges from 4 to 16 million barrels (95% to 5% probability, respectively).

USGS is the only provider of publicly available estimates of undiscovered technically recoverable oil and gas resources of onshore lands and offshore state waters. The USGS Utica Shale assessment was undertaken as part of a nationwide project assessing domestic petroleum basins using standardized methodology and protocol.




84 trillion cubic feet is roughly 87 quadrillion BTU (quads).  The USA consumes about 100 quads of energy per year.  These deposits are nowhere near a solution for our energy needs; anyone who can do the math can see this.


If you combine wind, solar, grain ethanol, geothermal and hydro it is nowhere near a solution for our energy needs either; anyone who can do the math can see this.

They may be renewable but new fossil fuel discoveries continue at many per year.


Uranium already in the US inventory, burned in Integral Fast reactors, could power the USA for over 400 years at current rates of consumption.


Solar energy over unused desert lands in USA could supply enough power for USA for many thousand/million years.

Capturing solar energy at 50% rate will be possible within one or two decades. Transporting huge amount of electricity is not a real challenge. Storing huge amount of energy, is still a challenge but it will be done. Transforming excess solar electricity into hydrogen for FCEVs and for large power plants are possibilities. Local and distributed Hydrogen storage is a strong possibility.

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