by Taskforce_Unity » Tue 23 Aug 2005, 14:46:14
$this->bbcode_second_pass_quote('Shiraz', 'Q')uestion/criticism:
I'm not perfectly clear on this but, the way I read it, what you are doing is taking an estimated decline rate, extrapolating, then adding new projects on to that. This seems to be inconsistent because, after all, the historic decline rate has persisted despite new projects in the past. Alternatively, you may be referring to the rate of depletion of the existing resource base. It is ambiguous as to which of these you refer in places, and I hope this is not ambiguous in later updates.
This is correct for countries which have already peaked. It is ofcourse not the correct situation but an estimate. Since there are some big projects coming onstream (for example the USA, thunderhorse, atlantis etc..) it is quite possible that the decline rate seen in previous years is halted. It is not very likely but in some cases possible.
Ofcourse a better estimate is made by incorporating past projects and looking at the effect on the specificic fields declining. That would take so much time to find out however that i did not make that attempt. Then again we can question if it will change the outlook that much.
I understand also from khebab's post that it is not entirely clear how much outside sources or quotes about decline rates have been taken seriously.
My point was that everything under the heading:
Oil production outlook
is incorporated into the actual calculation, the rest (decline rate: and specific information: is just a guideline).
I will make this more clear in later versions.
$this->bbcode_second_pass_quote('Shiraz', '
')In general then, it would be nice if for each country, along with the other pieces of data listed (proven reserves etc.), we might be able to see the estimated rate of depletion of the existing resource base, and also the estimated decline rate (for the post-peak countries). After all, these are the core estimates that generate the prediction.
The incorporated decline rate is stated at oil production outlook? Or do you want the absolute decline as in numbers?
')Actually, I wonder whether you need to use a decline rate at all? Wouldn't it make more sense to simply take the rate of depletion of the existing resource base and add new projects to that?