Garrett County and Natural Gas - Risks and Benefits

A selection of categorized links to allow one to assess the risks and benefits of gas development in Garrett Conty.

Garrett County Montage

Casings

Properly designed and installed casings are probably the most important aspect of a drilling operation because it dictates how well our drinking water is isolated from the gas operations. These are links related to that.

- 1429 - [April 12, 2014] - The Columbus Dispatch, Laura Arenschield - "Fracking study: Correctly built wells don't contaminate water"
"Fracking — fracturing shale to free up oil and gas — does not inherently contaminate nearby drinking water with methane, a new study has found.
But poorly constructed wells with leaky casings or faulty cement can allow methane to leach into drinking water, according to the study, published yesterday in the Proceedings of the National Academy of Sciences."
- 1489 - [NA] - Roscoe Moss Company, NA - "A Guide To Water Well Casing and Screen Selection"
"The material contained in this pamphlet is in based on a broad practical knowledge of water well design, construction, operation and maintenance, as well as steel products manufacture. These resources are enhanced by an ongoing systematic research and evaluation program. We are pleased to share the information following, some of which represents proprietary company knowledge and has never before been published."
- 1490 - [NA] - RigZone, RigZone - "How Does Casing Work?"
"Once a well has been drilled, if it is to become a production well, the well must undergo completion. While drilling a well cuts through the rock formations and allows drilling engineers to reach the reservoir below, the raw sides of the well cannot support themselves. Similar to the bones of your spine protecting the spinal cord, casing is tubing that is set inside the drilled well to protect and support the wellstream.
In addition to providing stabilization and keeping the sides of the well from caving in on themselves, casing protects the well-stream from outside contaminants, as well as any fresh water reservoirs from the oil or gas that is being produced.
Also known as setting pipe, casing a well involves running steel pipe down the inside of a recently drilled well. The small space between the casing and the untreated sides of the well is filled with cement to permanently set the casing in place."
- 1491 - [NA] - The Oil Drum, NA - "Casing a Well"
"Not that well casing is the only thing in the local environment that has to be protected or designed for. Because the odds are that where you want to drill does not sit right next to a highway. That means that you are going to have to install some sort of a road to get to where you want to put the drill. That may sound fairly straightforward in somewhere like Texas, (though it got some folks upset in Wyoming), but it becomes a lot more complicated if your oil patch is in the middle of the North Slope of Alaska, or the Empty Quarter in Saudi Arabia"
- 1604 - [June 26, 2014] - The Tyee, Andrew Nikiforuk | TheTyee.ca - "Shale Gas: How Often Do Fracked Wells Leak?"
"One of the boldest claims made by the shale gas industry goes like this: oil and gas companies have drilled and fractured a million oil and gas wells with nary a problem.
In other words fracture fluid or methane leaks are "a rare phenomenon."
But industry data disproves this dubious claim says Cornell University engineer Anthony Ingraffea, the main source for this series, who has studied the non-linear science of rock fractures for three decades. "
- 1610 - [NA] - PSE - Physicians Scientists & Engineers for Healthy Energy, Anthony R. Ingraffea , PH.D., P.E - "Fluid Migration Mechanisms due to Faulty Well Design and/or Construction: an Overview and Recent Experiences in the Pennsylvania Marcellus Play"
"An overall description of mechanisms by which oil and gas wells can develop gas and other fluid leaks can be found in Dusseault et al. (2000). These mechanisms can be exacerbated with repeated pressurization of the casing, with open-annulus sections along the casing, and with high gas pressures encountering curing cement or entering such open-hole sections. All of these exacerbating factors lead to more rapid occurrence and upward growth of circumferential fractures, essentially disbonding, in the rock-cement and /or the cement-casing interface."