Shale Drilling Could Provide a Way to Deal with Abandoned Oil
Wells
Pittsburgh Tribune-Review
15 January 2012
By Timothy Puko
Almost all of the 20 homeowners in Belmar pay to run a water
chlorination system to replace what was free well water from an
Allegheny River aquifer. In the 1980s, an oil driller polluted the
water, in part, they believe, by dumping waste brine into
abandoned oil wells that could date to the 1800s, when Edwin L.
Drake set off the boom by tapping his famous well in Titusville.
Today the latest gas-drilling rush in the Marcellus shale may
bring an opportunity to plug many of those old wells, but it also
brings the risk that old wells could create a path for gas and
chemicals to migrate into soil and water.
"The whole area up here is like Swiss cheese," said Weltner, 80,
secretary-treasurer of Belmar Association Inc., which operates the
treatment system. "It just has holes through all the different
strata in the ground, so there's an awful lot of opportunities for
contamination of the groundwater. And I think a lot of people are
concerned about it, and a lot more communities are getting a
public system" to replace water wells.
Most of the state's abandoned wells are in Western Pennsylvania.
They arc though McKean, Venango and Butler counties and, in
smaller clusters, around the Pittsburgh area.
Unplugged wells pose risks of illegal dumping, water pollution,
cave-ins, gas seepage and even explosions, but the state can
afford to plug only about 130 a year. At that rate, it could take
the state more than 61 years to plug the 8,262 remaining wells
that officials know about, and more than 1,350 years to plug the
rest -- if crews could find them.
In the past, drillers abandoned wells because there was no rule
that said they couldn't.
Companies that no longer exist cannot be held liable.
The rejuvenation of the fuel-drilling industry in Pennsylvania
could provide a chance to deal with abandoned wells, officials
say. With the backing of Gov. Tom Corbett, the Senate and House in
November passed preliminary bills that would establish "impact
fees" on the industry, and some of that money would be put toward
plugging old wells.
Abandoned wells can appear -- or hide -- in a number of forms.
Some are holes that are several feet wide and more than 100 feet
deep. Others are a few inches of pipe at the wellhead poking up
from the ground. Some are camouflaged by cave-ins and overgrowth,
appearing as small dips in the landscape.
The Department of Environmental Protection ordered an emergency
plug of a well in Moon in 2010 when residents near J.A. Allard
Elementary School reported smelling gas from an abandoned well. A
house in McKean County exploded last February, leading the DEP to
order the owner of three abandoned wells there to pay to have them
plugged.
No state records of wells
Drillers pay a surcharge when they obtain permits, which
amounts to about $1.5 million annually that the state uses to plug
wells, according to DEP figures. The cost of plugging can vary.
DEP contracts since 2009 have ranged from as little as $3,027 per
well to as much as $194,082, an agency spokesman said.
The Senate's bill, which proposes higher well fees than the House
measure, would generate an additional $25 million annually for
statewide environmental projects that would include well plugging,
mine drainage cleanup, parks and water quality monitoring.
"We're trying to tie in ancient environmental problems with new
development, which is fantastic," said David Strong, a Jefferson
County environmental scientist who sits on several of DEP's
citizen advisory boards. "We can find new money to fight these old
problems."
It's in the industry's interest to help solve those problems, said
Strong and several others, including industry officials. One of
the biggest problems is finding most of the abandoned wells. If a
company unwittingly drills a well near an abandoned well, it can
create a path for gas to flow uncontrolled to the surface or into
groundwater, costing profits and causing a safety hazard.
The old holes usually range from 1,500 to 3,500 feet deep, said
Cleason Smith, who owns Hydrosystems Management Inc. in Washington
County. Smith's family photos of Washington, taken in the 1800s,
show about a dozen drilling derricks next to buildings in the
foreground -- and another dozen in the background, to the fading
horizon. The state never had records of where those wells and
others like them are located, according to its website.
Even if an old and new well don't cross, gas migrating from deep
wells can reach abandoned ones and cause contamination through
natural fissures, or if man-made seals don't hold, Smith said.
"Drilling through the rocks that have previously sealed in the
formation ... a lot depends on the efficiency of those borehole
seals in preventing any leakage," Smith said. "If there's any
leakage from a Marcellus well, there's potential for it to make
contact with an old, abandoned oil and gas well."
Who should plug wells?
Officials at several drilling companies did not grant interview
requests, but those who did respond said their companies check
drilling zones for abandoned wells before beginning their work.
They rarely find them.
Chesapeake Energy has found some in other parts of the state,
spokeswoman Jacque Bland wrote in an e-mail, noting that the
company worked with DEP to determine who should plug the wells.
Chesapeake has not found any near its sites in Washington County,
which, after Butler County, has one of the highest concentrations
of abandoned wells in the area, according to DEP.
Range Resources found one or two old wells while drilling about
200 wells in Washington County. The company worked with DEP and
obtained permission to plug one well, spokesman Matt Pitzarella
said. If company workers missed a well, it would cause notable
pressure changes that gauges should pick up during drilling,
allowing supervisors to stop drilling and avoid problems, he said.
The issue could become problematic for drillers as they explore
the edges of the Marcellus shale play where the oil industry once
operated, such as Butler and Venango counties and the northwestern
part of the state, industry officials said. It is not an issue
right now for Royal Dutch Shell plc, which operates in western
Butler County, but company officials know it could be if they move
into "natural expansion" areas such as Venango County, said Bill
Langin, who leads Shell's Appalachian exploration.
Using land surveys and record and data searches, Shell looks for
mined coal seams and abandoned wells before constructing its well
pads, Langin said. The metal that wells contain can help companies
identify them through aerial searches or magnetic surveying, but
many of the wells were stripped of metal during World War II,
complicating efforts, experts say.
"The only way to find the other ones -- you have to send somebody
into the woods to walk around," Pitzarella said.
It would help if the state required drillers to search for
abandoned wells as part of the permitting process, said Jack
Ubinger, senior vice president of the Pennsylvania Environmental
Council. That would ensure that all companies conduct thorough
searches and help the state incrementally increase the number of
wells it knows about, he said.
"We shouldn't be sitting around ... trying to speculate," Ubinger
said. "When we talk about having a more robust, pre-development
site permitting, we haven't got a lot of traction with the
industry."
Timothy Puko can be reached at tpuko@tribweb.com or 412-320-7991.