Abandoned wells
June 2, 2012
Yesterday on the NPR station WSKG broadcast of Living on Earth ( http://www.loe.org/) there was a segment on locating abandoned oil/gas wells in PA – very interesting and relevant.
Some excerpts:
DOE Looks for Orphan Wells
CURWOOD: It’s Living on Earth, I’m Steve Curwood. For more than 150 years prospectors in the United States have drilled countless holes in the ground in search of oil and gas. Most of the resulting wells were sealed once they became unprofitable. But improperly sealed ones can lead to explosions and other hazards.
With the gas rush now underway in the Marcellus Shale in the Eastern U.S., the federal Department of Energy has made the search for so-called “orphan wells” a high priority.
….The helicopter has special equipment mounted on long, white poles on either side. At the end of each pole is a white cylinder pointed at the ground. Inside, these canisters are essentially advanced metal detectors. They can pick up cars, natural metals like gold, or the metal casings found in abandoned oil and gas wells.
….An abandoned well, if it’s not properly plugged, it provides a conduit for gases to come to the surface. These gases could be, of course, methane, natural gas, or something like radon.
….The first natural gas well in Pennsylvania was drilled in 1859. But the industry wasn’t regulated until 1956. That left almost a century’s worth of wells drilled, with little or no records of where they were located. It’s estimated there are more than 100,000 of these so-called “orphan wells” sitting in Pennsylvania.
.…One problem with looking for wells, Carter says, is a lot of the metal casings used to detect these wells are gone.
(The program does not explain how these wells are located, as the sensing system is based on magnetism detecting the steel casing.)
…..Our story on orphaned wells comes to us from the radio show The Allegheny Front.
From the DEC’s revised DSGEIS
Preliminary Revised Draft SGEIS 2011, Page 7-59
To ensure that abandoned wells do not provide a conduit for contamination of fresh water
aquifers, the Department proposes to require that the operator consult the Division’s oil and gas
database as well as property owners and tenants in the proposed spacing unit to determine
whether any abandoned wells are present. If (1) the operator has property access rights, (2) the
well is accessible and (3) it is reasonable to believe based on available records and history of
drilling in the area that the well’s total depth may be as deep or deeper than the target formation
for high-volume hydraulic fracturing, then the Department would require the operator to enter
and evaluate the well, and properly plug it prior to high-volume hydraulic fracturing if the
evaluation shows the well is open to the target formation or is otherwise an immediate threat to
the environment. If any abandoned well is under the operator’s control as owner or lessee of the
pertinent mineral rights, then the operator is required to comply with the Department’s existing
regulations regarding shut-in or temporary abandonment if good cause exists to leave the well
unplugged. This would require a demonstration that the well is in satisfactory condition to not
pose a threat to the environment, including during nearby high-volume hydraulic fracturing, and
a demonstrated intent to complete and/or produce the well within the time frames provided by
existing regulations.
A criticism of the of this section is that this “proposal” could easily miss wells which have long since been abandoned, especially those from which the casing was removed for scrap steel. From the DEC’s website:
Long Abandoned Wells Predate Strict Rules
DEC has a strict environmental regulatory program for oil and gas wells drilled in New York. New York has had an active oil and gas industry since the 1880’s and DEC estimates that more than 75,000 oil and gas wells have been drilled in the state. Most of these wells existed prior to the establishment of New York’s regulatory program in 1963 that ensures the proper plugging of wells. DEC has identified about 4,800 unplugged, abandoned oil and gas wells in New York for which no known owner can be located. It estimates that at least as many more unplugged and abandoned wells exist that are yet to be discovered. Many of the older wells were abandoned by their owners when low production and/or low prices made it unprofitable for them to continue production.
I expect that this airborne scanning technology will be cited by the DEC to deflect some of the criticism about undocumented wells.
Jim Weiss
1. They didn’t talk about cost to find/time to find
2. They didn’t talk about cost to plug
3. They didn’t talk about alternative technologies to find (there is ALWAYS som other way(s)
4. They didn’t talk about old abandoned water wells – another contamination vector
5. Sigh, S
GDACC 
