SherryMayo wrote:Campbell uses proprietry IHS/petroconsultants data which is probably the reason it can't be released (usually you have to pay for access to it).
Thats not the impression I get from what ASPO say about it in their newsletter. Neither the defunct Petroconsultants or IHS are mentioned.
From the current newsletter:(my emphasis)
"635. Database
The database and depletion model, upon which the graph and table on Page 2 are based are
at present maintained by ASPO IRELAND (
www.peakoil.ie). It endeavours to unravel the ambiguous definitions, and misunderstood reporting practices, and
is compiled from individual country assessments (see last page).. Most of the numbers deserve generous rounding, but nevertheless form a useful basis for general planning."
I read that as meaning ASPO Ireland (I.e. Campbell) does an individual country assesment including calculating the projected Hubbert curve for that country, and then uses that data as input for the world as a whole. The source of the data used for the individual country assessment is not mentioned.
I see no reason why they should not release a thorough work through including all sources for at least one country so that we can see what is going on.
I would be interested to know what "unravel the ambiguous definitions, and misunderstood reporting practices" actually means in practice. - would Campbell use those words in relation to Petroconsultants/IHS data which would have had all the 'inconsistencies' already smoothed out of it? Accuracy and consistency is presumably what one is paying a huge ammount of money for in IHS data - and a certain ammount of predigestion and analysis..
Sounds more like he's compiling info from multiple public sources and having to 'adjust' them himself to achieve consistency from one company / country to another .
Koppelaar and Skrebowski seem to be somewhat more forthcoming than ASPO. From what Ive read it would more or less be possible for somebody with the neccessary stomach for it and the knowledge of the subject to replicate and/or check their results. I've no knowledge of how Deffeyes came up with Thanksgiving day as his global conventional peak!
there's still a pretty wide spread - 'Global peak oil now' from Deffeyes to 'sometime in the next ten years' for Non-Opec peak by the others you mentioned.