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Earthquakes and Natural Gas Hydraulic Fracturing (Fracking) Link Confirmed

Commodities / Natural Gas Nov 10, 2011 - 01:56 AM GMT

By: OilPrice_Com

Commodities

Best Financial Markets Analysis ArticleOn 5 November an earthquake measuring 5.6 rattled Oklahoma and was felt as far away as Illinois.

Until two years ago Oklahoma typically had about 50 earthquakes a year, but in 2010, 1,047 quakes shook the state.


Why?

In Lincoln County, where most of this past weekend's seismic incidents were centered, there are 181 injection wells, according to Matt Skinner, an official from the Oklahoma Corporation Commission, the agency which oversees oil and gas production in the state.

Cause and effect?

The practice of injecting water into deep rock formations causes earthquakes, both the U.S. Army and the U.S. Geological Survey have concluded.

The U.S. natural gas industry pumps a mixture of water and assorted chemicals deep underground to shatter sediment layers containing natural gas, a process called hydraulic fracturing, known more informally as "fracking." While environmental groups have primarily focused on fracking's capacity to pollute underground water, a more ominous byproduct emerges from U.S. government studies - that forcing fluids under high pressure deep underground produces increased regional seismic activity.

As the U.S. natural gas industry mounts an unprecedented and expensive advertising campaign to convince the public that such practices are environmentally benign, U.S. government agencies have determined otherwise.

According to the U.S. Army's Rocky Mountain Arsenal website, the RMA drilled a deep well for disposing of the site's liquid waste after the U.S. Environmental Protection Agency "concluded that this procedure is effective and protective of the environment." According to the RMA, "The Rocky Mountain Arsenal deep injection well was constructed in 1961, and was drilled to a depth of 12,045 feet" and 165 million gallons of Basin F liquid waste, consisting of "very salty water that includes some metals, chlorides, wastewater and toxic organics" was injected into the well during 1962-1966.

Why was the process halted? "The Army discontinued use of the well in February 1966 because of the possibility that the fluid injection was "triggering earthquakes in the area," according to the RMA. In 1990, the "Earthquake Hazard Associated with Deep Well Injection--A Report to the U.S. Environmental Protection Agency" study of RMA events by Craig Nicholson, and R.I. Wesson stated simply, "Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established."

Twenty-five years later, "possibility" and 'established" changed in the Environmental Protection Agency's July 2001 87 page study, "Technical Program Overview: Underground Injection Control Regulations EPA 816-r-02-025," which reported, "In 1967, the U.S. Army Corps of Engineers and the U.S. Geological Survey (USGS) determined that a deep, hazardous waste disposal well at the Rocky Mountain Arsenal was causing significant seismic events in the vicinity of Denver, Colorado."

There is a significant divergence between "possibility," "established" and "was causing," and the most recent report was a decade ago. Much hydraulic fracturing to liberate shale oil gas in the Marcellus shale has occurred since.

According to the USGS website, under the undated heading, "Can we cause earthquakes? Is there any way to prevent earthquakes?" the agency notes, "Earthquakes induced by human activity have been documented in a few locations in the United States, Japan, and Canada.

The cause was injection of fluids into deep wells for waste disposal and secondary recovery of oil, and the use of reservoirs for water supplies. Most of these earthquakes were minor. The largest and most widely known resulted from fluid injection at the Rocky Mountain Arsenal near Denver, Colorado. In 1967, an earthquake of magnitude 5.5 followed a series of smaller earthquakes. Injection had been discontinued at the site in the previous year once the link between the fluid injection and the earlier series of earthquakes was established."

Note the phrase, "Once the link between the fluid injection and the earlier series of earthquakes was established."

So both the U.S Army and the U.S. Geological Survey over fifty years of research confirm on a federal level that that "fluid injection" introduces subterranean instability and is a contributory factor in inducing increased seismic activity." How about "causing significant seismic events?"

Fast forward to the present.

Overseas, last month Britain's Cuadrilla Resources announced that it has discovered huge underground deposits of natural gas in Lancashire, up to 200 trillion cubic feet of gas in all.
On 2 November a report commissioned by Cuadrilla Resources acknowledged that hydraulic fracturing was responsible for two tremors which hit Lancashire and possibly as many as fifty separate earth tremors overall. The British Geological Survey also linked smaller quakes in the Blackpool area to fracking. BGS Dr. Brian Baptie said, "It seems quite likely that they are related," noting, "We had a couple of instruments close to the site and they show that both events occurred near the site and at a shallow depth."

But, back to Oklahoma. Austin Holland's August 2011 report, "Examination of Possibly Induced Seismicity from Hydraulic Fracturing in the Eola Field, Garvin County, Oklahoma" Oklahoma Geological Survey OF1-2011, studied 43 earthquakes that occurred on 18 January, ranging in intensity from 1.0 to 2.8 Md (milliDarcies.) While the report's conclusions are understandably cautious, it does state, "Our analysis showed that shortly after hydraulic fracturing began small earthquakes started occurring, and more than 50 were identified, of which 43 were large enough to be located."

Sensitized to the issue, the oil and natural gas industry has been quick to dismiss the charges and deluge the public with a plethora of televisions advertisements about how natural gas from shale deposits is not only America's future, but provides jobs and energy companies are responsible custodians of the environment.

It seems likely that Washington will eventually be forced to address the issue, as the U.S. Army and the USGS have noted a causal link between the forced injection of liquids underground and increased seismic activity. While the Oklahoma quake caused a deal of property damage, had lives been lost, the policy would most certainly have come under increased scrutiny from the legal community.

While polluting a local community's water supply is a local tragedy barely heard inside the Beltway, an earthquake ranging from Oklahoma to Illinois, Kansas, Arkansas, Tennessee and Texas is an issue that might yet shake voters out of their torpor, and national elections are slightly less than a year away.

Source: http://oilprice.com/Energy/Natural-Gas/U.S.-Government-Confirms-Link-Between-Earthquakes-and-Hydraulic-Fracturing.html

This article was written by Dr. John CK Daly for Oilprice.com who offer detailed analysis on Crude Oil, Geopolitics, Gold and most other commodities. They also provide free political and economic intelligence to help investors gain a greater understanding of world events and the impact they have on certain regions and sectors. Visit: http://www.oilprice.com

© 2011 Copyright OilPrice.com- All Rights Reserved
Disclaimer: The above is a matter of opinion provided for general information purposes only and is not intended as investment advice. Information and analysis above are derived from sources and utilising methods believed to be reliable, but we cannot accept responsibility for any losses you may incur as a result of this analysis. Individuals should consult with their personal financial advisors.


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