Over the last six years, oil and natural gas production within the United States has exploded.
It was known that these resources were trapped in shale rock, but until recently there was no way to effectively reach them.
But with new technologies and improvements, the drilling technique fracking became an economical and viable way to extract these resources. And as this extraction became possible, people flocked to shale-heavy regions looking for work.
States like North Dakota and Kansas watched small towns blossom into boomtowns. Populations increased by the thousands.
And oil fields that had previously lost potential, or gotten close, were once again profitable. Fracking lit up the energy news as it created a huge growth in domestic energy production.
That growth has yet to slow. Improvements in fracking continue to increase the estimates of U.S. shale oil and gas reserves.
What is Fracking?
Hydraulic fracturing, or fracking, began in its most familiar form in 1947, but only recently, after numerous improvements and advances, has it entered the spotlight in its use on the shale formations across the United States.
It is the process of injecting water mixed with sand and chemicals into horizontal wells within shale formations. The high pressure injection creates fissures in the rock, held open by the grains of sand, which release the natural gas trapped inside. The diagram below from the EIA details the process:
There are a number of shale plays across the U.S. with the potential for natural gas extraction through fracking. Major ones include:
Marcellus – New York, Pennsylvania, Ohio, Maryland, West Virginia
Haynesvilles – Texas, Arkansas, Louisiana
Eagle Ford – Texas
Barnett – Texas
Bakken – Montana, North Dakota
Niobrara – Colorado, Kansas, Nebraska
These plays are being developed, though not in all areas. Some states are still weighing the benefits against the risks in deciding whether to allow drilling to proceed. Because, as with most things, there are two sides to the story.
Fracking All the Way
Advocates for fracking have praised it as the road to energy independence. Between 2010 and 2011, U.S. oil imports decreased by 3% according to BP's Statistical Review of World Energy. And oil and natural gas exploration companies continue to release new estimates on technically recoverable resources in their drilling regions, boosting the projection of shale gas and oil potential in the U.S.
Currently, the U.S. has an estimated 482 trillion cubic feet (Tcf) of technically recoverable shale gas, according to the EIA.
Fracking has also been a major job creator in the last few years, actually bringing the unemployment rate of the town of Williston, North Dakota, which sits atop the Bakken formation, to just above 1%.
And supporters also make the claim that burning natural gas is much cleaner than burning some dirtier fossil fuels like coal. Of course, there are still emissions, but they are greatly reduced. And since renewable power sources will need some time before they are able to compete with fossil fuels, natural gas is a good alternative.
But many environmentalists refuse to support hydraulic fracturing.
For all its benefits in increasing domestic production, fracking has raised a number of environmental and health concerns.
Because of the high chemical levels contained in fracking fluids, opponents are concerned that these chemicals may leak into groundwater. This has been the case in some situations, often due to leaks from weak well construction.
Companies are not required to disclose the chemicals involved in the injections, and so many worry about exposure to these unknown, potentially toxic substances.
Fracking uses very high amounts of water which, in addition to consuming millions of gallons of water per well that might be needed elsewhere, turns into millions of gallons of wastewater containing chemicals.
Earthquakes have occurred in areas with fracking wells. Though they're often very small, these sorts of man-made tremors have worried environmentalists and residents alike.
Vermont became the first state to ban fracking completely. Though this ban affects no existing shale plays, some believe it may set a standard for states that are debating the fracking issue.
The Department of Energy released a report on fracking in August, 2011 that recommended a number of actions and regulations to fracking companies in order to minimize public health concerns and avoid potential harm to the environment. Though it did not involve a thorough study of fracking and the potential environmental threats, the U.S. Environmental Protection Agency is currently involved in an intensive study of the effects.
The Department of Energy did recommend a number of safety precautions, but it also noted that the economic benefits of fracking were overwhelming.
So no matter which side you fall on in the fracking debate, you can be certain that it will probably be around for a while unless major environmental issues are uncovered in the EPA report, which is due out in 2014.
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