My quite limited undertsanding of "tight shale" is that produces a flood of gas at first and them settles down to a long term trickle.  -75% Year One, -5% Years Two, Three, etc. is my understanding.

So, mature tight shale wells are a good long term source of NG.  Better than most others.

Alan

It is significant, I think, that energy sources like these trickling NG wells and 'stripper' crude wells are gradually approaching the same kind of 'trickle' of energy flow that one gets from PV installations. If we are destined to have to live on a trickle of energy, rather than drilling 1,000,000 gas wells we should be installing energy extracting devices that have a limitless reservoir to draw from.