I don’t think it’s been used offshore like that? There’s a few people making a lot of noise about offshore fracking now but I’d never heard of it being done, at least on a production scale.
There’s 2 sides to it. First, is just whether or not you trust the tech. Second is whether it’s actually a good idea, since it’s all about extending carbon dependance when really we (mostly) want to be getting away from it.
Trouble is that there’s been 2 messages on carbon dependance- 1) It’ll set the world on fire and 2) We’ll run out. Both pretty good reasons and different groups of people are receptive to different arguments, but overturning one doesn’t mean you can ignore the other.
I see it as basically fossil fuel escalation, and all part of the problem of increasingly marginal/undesirable production- tar sands, antarctic drilling, dodgy exporting nations, oil wars etc. There’s got to be a line somewhere. Maybe fracking helps reduce the pressures that would otherwise lead to less desirable routes. Or maybe it is a less desirable route. Not sure we know.