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The Myths About Fracking Are Many And Damaging




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Disclaimer:
The author of this entry is responsible for this content, which is not edited by the Wilson County News or wilsoncountynews.com.
July 20, 2015 | 2,575 views | Post a comment

By Merrill Matthews

Fracking media coverage is a confused mess. One day there's a news story
implying that fracking is causing earthquakes or groundwater
contamination; the next day there's a different story asserting there's
no clear connection.

No wonder the Gallup Polling Co. recently found that an equal number, 40
percent, supported and opposed fracking.

One problem is that people, and especially reporters, frequently confuse
fracking with wastewater injection.

Hydraulic fracturing, or "fracking," has been around for decades. It's a
process whereby water, mixed largely with sand and a small amount of
chemicals, is forced into shale rock located miles underground.

The mixture breaks up the shale and allows the trapped oil and natural
gas to be extracted. Drillers then recapture that wastewater mixture and
dispose of it deep in the ground, sometimes in a previously existing
well, known as wastewater injection wells.

Whenever an earthquake happens, the public and the media immediately want
to blame fracking. But there is no evidence that fracking causes
earthquakes. During a spate of relatively minor earthquakes in Irving,
Texas last winter, the media and public immediately assumed fracking was
to blame. Only there was no active fracking close by.

Moreover, fracking usually occurs at depths of 6,000 to 10,000 feet,
while seismology tests conducted by federal agencies estimated the
earthquakes' origins at 18,000 feet deep or deeper.

Lately, some scientists have published a few studies suggesting that
wastewater injection wells might have been the cause of some of the
earthquakes in North Texas and other places.
The speculation is that wastewater injected near a fault line could cause
the tectonic plates to slip resulting in a minor earthquake.

The media immediately published unhelpful stories claiming fracking
caused the quakes, and in one case the study authors felt compelled to
make a statement that they were investigating wastewater injection, not
fracking.

But it appears these earthquakes are also originating 16,000 to 18,000
feet deep, and yet injection wells usually only go a third of that
distance. So while you can't rule out injection wells as the cause, they
aren't the most likely culprit.

Incidentally, both Connecticut and Alabama have been experiencing
numerous earthquakes recently, and there is no fracking or wastewater
injection in those states.

The other issue that has captured headlines over the past several years
is that fracking is contaminating drinking water. In response to these
concerns, Congress required the Environmental Protection Agency to study
the situation. After four years, the EPA just released its report,
concluding:

"We did not find evidence that these mechanisms (fracking and other
drilling processes) have led to widespread, systemic impacts on drinking
water resources in the United States."

The EPA's finding makes perfect sense, although it upset many in the
environmental community. Groundwater and aquifers tend to be a few
hundred feet below the surface, while fracked and injection wells are
thousands of feet deep--well below the bedrock that would keep chemicals
from rising to groundwater levels.

There have been some examples of the cement casings that surround a
well's borehole leaking small amounts of oil, gas or chemicals. But as
the EPA study indicates, those are isolated incidents and are easily
fixed. Moreover, these are wellbore integrity and maintenance issues and
are not limited to fracked wells.

Some environmentalists may not be happy with the science, but everyone
else should be because it means that the energy boom that has spurred the
U.S. economy for several years can and should proceed unhampered by
erroneous attacks.

Matthews is a resident scholar with the Institute for Policy Innovation
in Dallas.
 
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