I am not saying that they do not use some very nasty chemicals in fracturing. The big thing is they DO NOT use them here in Canada for coalbed methane (CBMs).
Coalbed mathane is just narrow coal seams where they pull up to a zone apply pressure with nitrogen and then it shatters the fragile coal into small particles allow the gas to freely migrate to the well bore. Many of these wells are underpressure meaning that they even need to pump the gas out of them - psi maybe 5 in the well bore.
CBMs have now been abandoned though as it is too expensive given the cost and what you get back.
Encana in Alberta lost money on all of its hundreds of CBM wells and as such they do not do them anymore. It is all simple economics.
Now I will not say they do not use a lot of nasty stuff on deeper formations but if you take a look at where these chemicals are injected that it is well below any fresh water table. Just so you know there are some ugly gases and other chemicals deep down that are naturally there - hydrogen sulfide being one.
Is there sometimes gas migration as the result of drilling - yes there is - is it a major problem? That one is debateable.
As far as the Syncrude and Suncor main plants go I personally do not see them as part of the conventional oil and gas industry and I call them open-pit mining. They have the tailings ponds - that kill ducks - and in many ways deserve the shot they deserve from environmental groups.
SAGD (Steam Assist Gravity Drain) on the other hand has been around for a long time and has been proven to be a major godsend for lots of oil extraction. We have had it here in Saskatchewan - Lloydminster area - for decades.
Fracturing goes on extensively in the Saskatchewan Bakken areas and I have yet to hear of any problems and concerns being raised there.
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