USGS Unveils Shale Potential for Alaska North Slope

For the first time, the U.S. Geological Survey has estimated the potential of undiscovered, technically recoverable onshore shale oil and gas resources in Alaska's North Slope. The estimates range from 0 up to 2 billion barrels of oil and from 0 up to 80 trillion cubic feet of gas – representing 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.

Primarily due to economic and infrastructure considerations, production has never been attempted from these Alaska North Slope shales, which span most of the North Slope but are largely absent from the environmentally sensitive Arctic National Wildlife Refuge.

"Better knowledge of the untapped resource potential found in all areas of the country will help us better make science-based decisions about how we continue to grow domestic energy production for America," said Secretary of the Interior Ken Salazar. "Alaska's energy resources hold great promise and economic opportunity for the American people, and we will continue to expand our scientific understanding of existing resources as part of our commitment to an all-of-the-above energy approach that includes safe and responsible production of American oil and gas resources."

"Providing scientifically sound, publicly available assessments of the quantity of new, untapped oil and gas resources in frontier areas is but the first step in weighing their potential contributions to energy supplies as well as the impacts of recovering them," said USGS Director Marcia McNutt. "This information can help leaders from both government and industry make good decisions for the long term, anticipate environmental issues in advance of development, and guide wise investments."

There is a large range of uncertainty associated with these assessment numbers, because of the uncertainty associated with estimation of undiscovered, continuous resources in source rocks from which no attempt has been made to produce oil or gas. However, the recent success of shale oil and shale gas development in the lower-48 states demonstrates the technical viability of such resources. Therefore, this new USGS assessment provides an estimate of potential resources that may be technically viable in this frontier region.

Three source rocks of the Alaska North Slope were assessed in this study – the Triassic Shublik Formation, the lower part of the Jurassic-Lower Cretaceous Kingak Shale, and the Cretaceous pebble shale unit-Hue Shale.

These shale formations are known to have generated oil and gas that migrated into conventional accumulations, including the super-giant Prudhoe Bay field. However, these shales also likely retain oil and gas that did not migrate.

Shales like those found in North Slope Alaska are known as source rocks – those 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, whereas continuous resources, such as shale oil and shale gas, remain trapped within the original source rock.

Shale oil is oil that was generated naturally in source rocks but that never migrated out of them. It should not be confused with "oil shale," a source rock in which oil has not yet been generated, but that is capable of generating oil if artificially heated.

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 worked with the Alaska Department of Natural Resources, the University of Alaska-Fairbanks, and others knowledgeable about North Slope geology for input into the geological models of the petroleum source rocks. This USGS assessment was undertaken as part of a nationwide project assessing domestic petroleum basins using standardized methodology and protocol.


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Tukirin | Mar. 4, 2012
about 3mb/day from oil shale:"Under high growth aitnmpssous, an oil shale production level of 1 million barrels per day is probably more than 20 years in the future, and 3 million barrels per day is probably more than 30 years into the future."Their most optimistic projection is a relative trickle of oil 30 years from now when we will be needing a flood. In case you havent heard, the world is on the verge of a serious and growing imbalance between the supply and demand of oil. The growth of oil production, which has averaged a couple percent a year for well over a century, has slowed to a halt in the last couple years. The oil industry can no longer satisfy growing demand and soon production will begin to decline. This is due to an inevitable reality of oil production called "Peak Oil". is an introduction to some of the darker implications of this problem.The point is that if oil shale, tar sands, and all other oil alternatives are wildly sucessful, it will at best merely lower the rate of decline of the worlds oil supplies. We are facing a future where we will have no choice but to use much less energy per person and our way of life will change dramatically to reflect that reality. Those who remain in denial of these harsh facts and do not prepare themselves for the coming changes will end up suffering far more than necessary.

david surbeck | Feb. 27, 2012
the USGS is active in finding new resources on American soil.

SOP | Feb. 25, 2012
2 billion barrels / 18 million barrels per day = 111 days US consumption

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