Good, because even the use of propane to release gas trapped in layers of shale would have many of the same negatives - release of methane into the atmosphere, massive logistics, disruption to communities, visual desecration and above all, it is staill the extraction and usage of yet another fossil fuel.
It would seem that ex-minister Arnaud Montebourg ( now working at Habitat ) submitted a report on the matter and government promptly buried it.
Read the report here in French: http://www.challenges.fr/energie-et-environnement/20150407.CHA4637/gaz-de-schiste-exploitation-possible-sans-fracturation-hydraulique.html
And here, the réposte of Minister Ségolene Royal: http://www.lepoint.fr/politique/segolene-royal-les-gaz-de-schiste-ne-sont-plus-d-actualite-07-04-2015-1919107_20.php
NB If you do not currently use Google Translator: https://translate.google.com/ why not give it a whirl.