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This section is equally flawed and appears to be written by someone who has no direct experience with oil shale. First, by what basis does the author claim that waste rock is a known carcinogen? Even if it were true for waste rock from some specific process, the differences in spent shale from different processes are vast, so it cannot be generally true. The statement that rock expands by about 30% after processing due to a popcorn effect is obsurd urban legend. The increase in mined oil shale volume occurs efore processing merely because there are interparticle voids introduced to any solid when it is broken up, and the fractional increase depends on the width of the particle size distribution. Beds of oil shale do not expand during retorting, as I have observed hundreds of times. A rare exception can occur for extremely rich oil shale veins (~60 gal/ton), which may froth during pyrolysis like a coking coal, but such cases are vanishingly small in importance, do not occur under load, and can be easily compacted away if they do occur.
Akburnham 00:17, 29 October 2006 (UTC)A. K. Burnham
There was a good faith addition concerning hydraulic fracturing: "Hydraulic fracturing, used for oil and gas shale extraction, can cause groundwater contamination." I removed this as it confused oil shale industry and oil and gas industry extracting from shales. These are different things. Although some proposed in-situ extraction technologies propose hydraulic fracturing as a part of the process, as of today hydraulic fracturing is not used in the oil shale industry. Beagel ( talk) 12:40, 14 September 2012 (UTC)
There is a good faith addition about methane release. Unfortunately this is incorrect as the reference concerns release of methane from hydraulically fractured shale in the process of oil and gas production, and it does not talk about oil shale (the term oil shale is even not used in this reference). Oil-bearing shales like Bakken Formation and oil shale are different things (oil shale event not always a shale but it could be, e.g. cannel coal etc). The confusion is based on the fact that the term "shale oil" is interchangeable, as it is used as well for crude oil produced from shales of other very low permeability formations. However, for avoiding the risk of confusion of shale oil produced from oil shale with crude oil in oil-bearing shales, the International Energy Agency recommends to use the term " light tight oil" and World Energy Resources 2013 report by the World Energy Council uses the term " tight oil" for the latter instead of shale oil. Correspondingly, oil and gas-bearing shales are not oil shales. Beagel ( talk) 15:17, 13 July 2015 (UTC)
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"In some cases it requires the lowering of groundwater levels below the level of the oil shale strata, which may have harmful effects on the surrounding arable land and forest". I failed to find a clue to explain the phenominon. Thank you very much. ThomasYehYeh ( talk) 02:18, 17 December 2022 (UTC)
This is the
talk page for discussing improvements to the
Environmental impact of the oil shale industry article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
![]() | Environmental impact of the oil shale industry received a peer review by Wikipedia editors, which is now archived. It may contain ideas you can use to improve this article. |
![]() | This article is rated Start-class on Wikipedia's
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![]() | Material from Oil shale was split to Environmental impact of the oil shale industry on 11:02, 19 July 2007. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted so long as the latter page exists. Please leave this template in place to link the article histories and preserve this attribution. The former page's talk page can be accessed at Talk:Oil shale. |
This section is equally flawed and appears to be written by someone who has no direct experience with oil shale. First, by what basis does the author claim that waste rock is a known carcinogen? Even if it were true for waste rock from some specific process, the differences in spent shale from different processes are vast, so it cannot be generally true. The statement that rock expands by about 30% after processing due to a popcorn effect is obsurd urban legend. The increase in mined oil shale volume occurs efore processing merely because there are interparticle voids introduced to any solid when it is broken up, and the fractional increase depends on the width of the particle size distribution. Beds of oil shale do not expand during retorting, as I have observed hundreds of times. A rare exception can occur for extremely rich oil shale veins (~60 gal/ton), which may froth during pyrolysis like a coking coal, but such cases are vanishingly small in importance, do not occur under load, and can be easily compacted away if they do occur.
Akburnham 00:17, 29 October 2006 (UTC)A. K. Burnham
There was a good faith addition concerning hydraulic fracturing: "Hydraulic fracturing, used for oil and gas shale extraction, can cause groundwater contamination." I removed this as it confused oil shale industry and oil and gas industry extracting from shales. These are different things. Although some proposed in-situ extraction technologies propose hydraulic fracturing as a part of the process, as of today hydraulic fracturing is not used in the oil shale industry. Beagel ( talk) 12:40, 14 September 2012 (UTC)
There is a good faith addition about methane release. Unfortunately this is incorrect as the reference concerns release of methane from hydraulically fractured shale in the process of oil and gas production, and it does not talk about oil shale (the term oil shale is even not used in this reference). Oil-bearing shales like Bakken Formation and oil shale are different things (oil shale event not always a shale but it could be, e.g. cannel coal etc). The confusion is based on the fact that the term "shale oil" is interchangeable, as it is used as well for crude oil produced from shales of other very low permeability formations. However, for avoiding the risk of confusion of shale oil produced from oil shale with crude oil in oil-bearing shales, the International Energy Agency recommends to use the term " light tight oil" and World Energy Resources 2013 report by the World Energy Council uses the term " tight oil" for the latter instead of shale oil. Correspondingly, oil and gas-bearing shales are not oil shales. Beagel ( talk) 15:17, 13 July 2015 (UTC)
Hello fellow Wikipedians,
I have just modified 4 external links on Environmental impact of the oil shale industry. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 22:57, 24 December 2016 (UTC)
"In some cases it requires the lowering of groundwater levels below the level of the oil shale strata, which may have harmful effects on the surrounding arable land and forest". I failed to find a clue to explain the phenominon. Thank you very much. ThomasYehYeh ( talk) 02:18, 17 December 2022 (UTC)