If you follow energy matters, you might have heard about the new shale gas extraction methods.
Allegedly the near cornucopia of free energy, the new methods, asides from using extremely toxic liquid materials to fracture the rock formations to let the gas slip out to the well bore, for extraction, have been promoted by people like T. Boone Pickens as the source for future US energy needs in the transport sector. The latter by switching the truck/heavy equipment fleet to natural gas power.
This is supposed to be a good idea because it’s supposedly a 100 year’s supply. As usual, sadly, with such rosy predictions, the real numbers, when re-examined in the light of non-delusional, somewhat sane, thinking, simply do not hold up.
A current theoildrum.com posting highlights this issue.
Arthur Berman talks about Shale Gas
If you investigate the origin of this supposed 100-year supply of natural gas…where does this come from? If you go back to the Potential Gas Committee’s [PGC] report, which is where I believe it comes from, and if you look at the magnitude of the technically recoverable resource they describe and you divide it by annual US consumption, you come up with 90 years, not 100. Some would say that’s splitting hairs, yet 10% is 10%. But if you go on and you actually read the report, they say that the probable number-I think they call it the P-2 number-is closer to 450 Tcf as opposed to roughly 1800 Tcf. What they’re saying is that if you pin this thing down where there have actually been some wells drilled that have actually produced some gas, the technically recoverable resource is closer to 450. And if you divide that by three, which is the component that is shale gas, you get about 150 Tcf and that’s about 7 year’s worth of US supply from shale. I happen to think that that’s a pretty darn realistic estimate. And remember that that’s a resource number, not a reserve number; it has nothing to do with commercial extractability. So the gross resource from shale is probably about 7 years worth of supply.