Well, I think that getting at the truth of these reserves numbers revolves around what the National Oil Companies (NOCs) in various countries want to tell us, and what they know, versus reality. Aramco is the most egregious example but Russia as another. As far as I can see, there's no transparency in their numbers--all we can do is watch the production figures as time passes.

I use the BP 2005 numbers for proved reserves on a country by country basis. Here are their 2005 report production figures.

The problem is that I don't know what the relationship is between the SEC rules as in linked above to the BP reporting and I'm not sure if any of this bears any relationship with reality according to NOC reporting. Here are BP's guidelines for defining their terms with respect to "reserves" and "resources" As far as I can see, estimates of "undiscoverd resources" are akin to predictions made from a Ouija Board.

Then, occasionally I'll look at stuff like BP says global oil reserves growth stalled in 2004 and wonder what's going on.
Bubba,
  Those were not my definitions.
  I still have no clear idea what a "reserve" is,
  let alone what a "proven" reserve is.

Those definitions were plucked from the identified sites, ... obviously with a little spin added by meaux.

From an oil man's point of view, what is a "proven reserve" and how clearly does it tell us whether the unseen but alleged oil "down there" actually is there and actually is recoverable in an "economic" sense?

It seems to me that the plucked definitions are hardly definitions at all, just new mud water tossed on top of old mud water so as to make the situation crystal murky.

So that will be the focus of a future post of mine. What are reserves and when you see a number what should it tell you.