[SoothSayer]

Most PO charts etc that I have seen refer to "all liquids".

Is the peaking of sweet oil especially important in any way? Or can heavier grades easily subsitute for it?

And when is the peak for the sweeter oils likely to happen?

[Cynus]

There is some evidence that light sweet has already peaked (perhaps others can provide the necessary links). But it is apparently hard to come by production figures for the different grades of crude.

[RonMN]

From what i've read in the last year...Mostly here in PO.com

- Light sweet has peaked & in decline.
- We don't have much refining capacity for heavy sour.
- Heavy sour is harder to pump & harder to refine
- Heavy sour gives 60% of the energy of light sweet (that means at 84 million barrels per day, if we ONLY had heavy sour, we would need to pump over 117 MBPD just to break even).

[mekrob]

I'm almost sure that it has peaked. All you have to do is look at where the new production is going to be coming from: Venzueala heavy, Canadian tar sands, etc. There is a good bit of new production from SA, Angola, Russia, etc, but I don't think this will all be light sweet and that new production won't offset light sweet production losses which is happening all over. It just makes sense. Light sweet was the easiest and cheapest therefore it was exploited first. The mere mention of tar sands and heavy oil and ultra deep sea oil just points to the fact that light sweet can't do it. If it hasn't peaked yet, it will, and at least several years before 'all liquids peak'. I'd like to refer back to "net oil". That explains it pretty well.

[Zardoz]

Good story on it here:

Don't forget the "Twin Peaks" of oil production

"We will seriously misjudge our situation if we only focus on gross production Peak Oil and neglect the worsening quality of oil and worsening energy net return on energy invested (ENROEI)."

This only a synopsis. Original story is in Norwegian, dang it...

[MonteQuest]

Regular oil peaked in 2004, according to ASPO

http://peakoil.com/fortopic10613.html+2004

Sweet vs Sour

http://www.casinocapitalism.com/2005/10 ... eet_c.html

http://www.econbrowser.com/archives/200 ... _sour.html

[Dreamtwister]

$this->bbcode_second_pass_quote('SoothSayer', 'I')s the peaking of sweet oil especially important in any way? Or can heavier grades easily subsitute for it?