People in Pavilion had noticed a foul taste and smell to their drinking water, so they notified the Environmental Protection Agency (EPA) about this and complained until they said they would come out and conduct a study. In this study, many hydrocarbons and other compounds that can be related to hydraulic fracturing and natural gas production were found in the soil as well as the water.
These compounds were found to most likely be from hydraulic fracturing and surface pits used during drilling. When a well is drilled, surface pits are used for drilling wastes and produced and flowback waters. These are usually man made and should be cleaned up once the well has been drilled.
So this may make hydraulic fracturing sound like a horrible process and encourage us to discontinue it. However, there is more to consider while reading this report.
First, these wells were drilled in the 1950's. Much has changed since then including drilling technology and certain standards needing to be met. Information was lacking in the well design of these wells in Pavilion, so it is hard to know exactly how they were drilled. Secondly, these wells were only a few hundred feet beneath the surface. In my research, I have never heard of a single well being that shallow. From my experience working at BP America this summer, each of the wells we discussed were all a few thousand feet beneath the surface. Because the wells in Pavilion are so shallow, it is a lot easier for methane and other hydrocarbons to migrate to the water table. Third, the surface casing of these wells "do not extend below the maximum depth of domestic wells in the area of investigation." This goes along with the shallowness of these wells. Finally, there is no baseline information to compare the results from this study to what would have been before hydraulic fracturing occurred.
Overall, these downfalls related to hydraulic fracturing are easy to fix. Simply drill deeper wells to avoid the effects hydraulic fracturing had here.
Currently the EPA is working on getting the water and soil in Pavilion cleaned up. It is difficult to get the funding because there is still no proof of the exact source of these compounds.
I realize this post is long. There is merely too much to say and too little room to say it. If there is any questions about anything that I said, feel free to ask.
-Aubrey Bagley
Interesting post. I didn't know that all of these were older wells. Interesting that this case has been used to oppose fracking in general, then, right? Is this why Encana isn't prioritizing measurement in the area? Are there other cases where older, malfunctioning wells are being used as scapegoats for fracking in general? And is there no new, problematic fracking in Pavilion at all?
ReplyDeleteJen,
ReplyDeleteI found that interesting as well. I think it is an important fact though and shouldn't be overlooked. I am not sure of why Encana is not prioritizing measurement in the area. I need more information regarding this topic to be able to answer the rest of these questions because the report does not cover that. If I find any more updated information about drilling in Pavilion, WY I will let you know. In the mean time, if you have any other questions, I would be happy to answer them.
Aubrey
Hey, there is a broken link in this article, under the anchor text - report
ReplyDeleteHere is the correct, working link so you can replace it - https://selectra.co.uk/sites/selectra.co.uk/files/pdf/Groundwatercontamination.pdf